Rename the Python package to daynivo_kiosk

src/voxip_kiosk -> src/daynivo_kiosk, with every import, the launchers,
install.sh, the Makefile and the manager's gunicorn app path. An upgrade
replaces /usr/lib/voxip-kiosk/python as a whole, so the old package
disappears; tested by upgrading an installation of the previous commit.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/daynivo_kiosk/__init__.py

@@ -0,0 +1 @@
+"""Daynivo Kiosk OS — kiosk runtime and Daynivo Kiosk Manager."""

src/daynivo_kiosk/agent.py

@@ -0,0 +1,295 @@
+"""voxip-kiosk-agent — keeps the kiosk page where it should be.
+
+Runs as user ``kiosk`` and steers Chromium through the DevTools Protocol on
+127.0.0.1:
+
+* shows the setup page (with setup code) until an admin password exists;
+* leaves the local start page / Chromium error page for the kiosk URL as
+  soon as that URL is reachable, and shows the offline page meanwhile;
+* follows URL changes from the web interface without restarting Chromium;
+* reloads periodically when ``refresh_interval`` is set — but never while
+  the URL is unreachable, so a page that works offline keeps working;
+* reloads a hung renderer, and closes the browser (systemd restarts it) if
+  that does not help.
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+import signal
+import socket
+import ssl
+import time
+import urllib.error
+import urllib.request
+from pathlib import Path
+from typing import Any, Callable
+from urllib.parse import urlencode, urlsplit
+
+from . import logutil, sysinfo
+from .cdp import CDP, CDPError
+from .config import admin_url, load_config
+from .paths import Paths, load_paths
+from .validation import mask_url
+
+log = logging.getLogger("voxip-kiosk-agent")
+
+TICK_SECONDS = 5
+PROBE_MAX_AGE_LOADING = 10
+PROBE_MAX_AGE_ONLINE = 60
+HUNG_RELOAD_AFTER = 3
+HUNG_RESTART_AFTER = 6
+NO_NETWORK = "Geen netwerkverbinding (netwerkkabel los?)"
+BLANK_URLS = {"", "about:blank", "chrome://newtab/", "chrome://new-tab-page/"}
+
+
+def probe(url: str, timeout: float = 8.0) -> tuple[bool, str]:
+    """Is ``url`` reachable over HTTPS with a valid certificate? → (ok, reason)."""
+    req = urllib.request.Request(url, method="HEAD", headers={"User-Agent": "Daynivo-Kiosk-OS/agent"})
+    try:
+        with urllib.request.urlopen(req, timeout=timeout, context=ssl.create_default_context()):
+            return True, ""
+    except urllib.error.HTTPError as exc:
+        if exc.code >= 500:
+            return False, f"Serverfout {exc.code}"
+        return True, ""
+    except urllib.error.URLError as exc:
+        return False, _reason(exc.reason)
+    except (OSError, ValueError) as exc:
+        return False, _reason(exc)
+
+
+def _reason(exc: Any) -> str:
+    if isinstance(exc, ssl.SSLCertVerificationError) or "CERTIFICATE_VERIFY_FAILED" in str(exc):
+        return "Certificaat ongeldig"
+    if isinstance(exc, ssl.SSLError):
+        return "TLS-fout"
+    if isinstance(exc, socket.gaierror):
+        return "Naam niet gevonden (DNS)"
+    if isinstance(exc, (socket.timeout, TimeoutError)):
+        return "Time-out"
+    if isinstance(exc, ConnectionRefusedError):
+        return "Verbinding geweigerd"
+    if isinstance(exc, OSError) and exc.errno in (101, 113):
+        return "Geen netwerkverbinding"
+    return "Niet bereikbaar"
+
+
+class Agent:
+    def __init__(self, paths: Paths, cdp: Any = None, probe_fn: Callable[[str], tuple[bool, str]] = probe,
+                 clock: Callable[[], float] = time.monotonic, wall: Callable[[], float] = time.time,
+                 hostname: Callable[[], str] = lambda: socket.gethostname().split(".")[0], addresses: Callable[[], dict] = sysinfo.ip_addresses):
+        self.paths = paths
+        self.cdp = cdp or CDP()
+        self.probe_fn = probe_fn
+        self.clock = clock
+        self.wall = wall
+        self.hostname = hostname
+        self.addresses = addresses
+        self.applied_url: str | None = None
+        self.last_load: float | None = None
+        self.hung = 0
+        self.offline_since: float | None = None
+        self.refresh_skipped_logged = False
+        self._probe: tuple[str, float, bool, str] | None = None
+        self.state: dict[str, Any] = {"last_error": None}
+        self._written = ""
+        self._setup_shown: str | None = None
+
+    # -- helpers ------------------------------------------------------------
+
+    def local_url(self, page: str, params: dict[str, Any]) -> str:
+        return f"file://{self.paths.www_dir}/{page}.html?" + urlencode(params)
+
+    def classify(self, url: str) -> str:
+        prefix = f"file://{self.paths.www_dir}/"
+        if url.startswith(prefix):
+            return url[len(prefix):].split(".html", 1)[0]  # start / offline / setup
+        if url.startswith("chrome-error://"):
+            return "error"
+        if url in BLANK_URLS:
+            return "blank"
+        return "remote"
+
+    def reachable(self, url: str, max_age: float) -> tuple[bool, str]:
+        now = self.clock()
+        if self._probe and self._probe[0] == url and now - self._probe[1] < max_age:
+            return self._probe[2], self._probe[3]
+        ok, reason = self.probe_fn(url)
+        self._probe = (url, now, ok, reason)
+        self.state.update(target_reachable=ok, reason=reason, checked_at=int(self.wall()))
+        return ok, reason
+
+    def error(self, message: str) -> None:
+        log.warning(message)
+        self.state["last_error"] = {"at": int(self.wall()), "message": message}
+
+    def has_network(self) -> bool:
+        """False when no interface has an address, e.g. the cable is out and there is no wifi."""
+        return bool(self.addresses())
+
+    def show_offline(self, config: dict[str, Any], reason: str) -> None:
+        if self.offline_since is None:
+            self.offline_since = self.wall()
+            self.state["offline_since"] = int(self.offline_since)
+        self.error(f"Kiosk-URL niet bereikbaar ({reason}); offlinepagina getoond")
+        self.navigate(self.offline_url(config, reason))
+
+    def setup_required(self) -> bool:
+        return self.paths.setup_code_file.exists() and not self.paths.admin_file.exists()
+
+    def setup_url(self, config: dict[str, Any]) -> str:
+        try:
+            code = self.paths.setup_code_file.read_text(encoding="utf-8").strip()
+        except OSError:
+            code = ""
+        ips = sorted({a.split("/")[0] for addrs in self.addresses().values() for a in addrs if ":" not in a})
+        scheme = "https" if config["admin_https"] else "http"
+        return self.local_url("setup", {"code": code, "host": self.hostname(), "ips": ",".join(ips),
+                                        "port": config["admin_port"], "scheme": scheme, "name": config["device_name"]})
+
+    def offline_url(self, config: dict[str, Any], reason: str) -> str:
+        return self.local_url("offline", {"name": config["device_name"], "host": urlsplit(config["url"]).hostname or "",
+                                          "url": mask_url(config["url"]), "admin": admin_url(config, self.hostname()),
+                                          "reason": reason, "since": int(self.offline_since or self.wall())})
+
+    def navigate(self, url: str) -> None:
+        self.cdp.navigate(url)
+
+    # -- main loop ----------------------------------------------------------
+
+    def tick(self) -> None:
+        config = load_config(self.paths.config_file)
+        target = config["url"]
+        self.state["updated"] = int(self.wall())
+        try:
+            page = self.cdp.main_page()
+            if page is None:
+                self.cdp.new_page(self.local_url("start", {"name": config["device_name"], "next": target}))
+                return
+            self._tick_page(config, target, page)
+            self.state["browser"] = "ok"
+        except CDPError as exc:
+            self.state.update(browser="unreachable", page=None)
+            self.hung = 0
+            log.debug("DevTools niet bereikbaar: %s", exc)
+        finally:
+            self.write_state()
+
+    def _tick_page(self, config: dict[str, Any], target: str, page: dict[str, Any]) -> None:
+        url = page.get("url", "")
+        kind = self.classify(url)
+        self.state.update(page=kind, page_url=mask_url(url) if kind == "remote" else kind)
+
+        if self.setup_required():
+            self.state["setup_required"] = True
+            want = self.setup_url(config)
+            if kind != "setup" or want != self._setup_shown:
+                self.navigate(want)
+                self._setup_shown = want
+            return
+        self.state["setup_required"] = False
+        self._setup_shown = None
+
+        url_changed = self.applied_url is not None and target != self.applied_url
+        if url_changed:
+            log.info("Nieuwe kiosk-URL: %s", mask_url(target))
+        self.applied_url = target
+
+        if kind != "remote" or url_changed:
+            ok, reason = self.reachable(target, 0 if url_changed else PROBE_MAX_AGE_LOADING)
+            if not ok and not self.has_network():
+                reason = NO_NETWORK
+            if ok:
+                if self.offline_since is not None:
+                    log.info("Kiosk-URL weer bereikbaar na %.0f s", self.wall() - self.offline_since)
+                self.navigate(target)
+                self.last_load = self.clock()
+                self.offline_since = None
+                self.state["offline_since"] = None
+            elif kind != "offline" or url_changed:
+                self.show_offline(config, reason)
+            self.hung = 0
+            return
+
+        # Without any network the page cannot recover by itself: say so on screen. When only
+        # the server is unreachable the page stays, so Daynivo can show its offline cache.
+        if not self.has_network():
+            self.state.update(target_reachable=False, reason=NO_NETWORK, checked_at=int(self.wall()))
+            self._probe = None
+            self.hung = 0
+            self.show_offline(config, NO_NETWORK)
+            return
+
+        if self.last_load is None:
+            self.last_load = self.clock()
+
+        if not self.cdp.responsive(page.get("webSocketDebuggerUrl")):
+            self.hung += 1
+            if self.hung == HUNG_RELOAD_AFTER:
+                self.error("Pagina reageert niet; herladen")
+                self.cdp.reload()
+                self.last_load = self.clock()
+            elif self.hung >= HUNG_RESTART_AFTER and config["browser_restart"]:
+                self.error("Pagina reageert nog steeds niet; Chromium wordt herstart")
+                self.hung = 0
+                self.cdp.close_browser()
+            return
+        self.hung = 0
+
+        ok, reason = self.reachable(target, PROBE_MAX_AGE_ONLINE)
+        interval = config["refresh_interval"]
+        if interval and self.clock() - self.last_load >= interval:
+            if ok:
+                log.info("Automatisch verversen (interval %s s)", interval)
+                self.cdp.reload()
+                self.last_load = self.clock()
+                self.refresh_skipped_logged = False
+            elif not self.refresh_skipped_logged:
+                self.error(f"Verversen overgeslagen: kiosk-URL niet bereikbaar ({reason})")
+                self.refresh_skipped_logged = True
+
+    def write_state(self) -> None:
+        state = dict(self.state, last_load_wall=int(self.wall() - (self.clock() - self.last_load)) if self.last_load else None)
+        payload = json.dumps(state, sort_keys=True)
+        if payload == self._written:
+            return
+        try:
+            tmp = self.paths.agent_state_file.with_suffix(".tmp")
+            tmp.write_text(payload, encoding="utf-8")
+            tmp.replace(self.paths.agent_state_file)
+            self._written = payload
+        except OSError as exc:
+            log.debug("Kon agentstatus niet schrijven: %s", exc)
+
+
+def read_state(path: Path) -> dict[str, Any]:
+    try:
+        data = json.loads(path.read_text(encoding="utf-8"))
+    except (OSError, ValueError):
+        return {}
+    return data if isinstance(data, dict) else {}
+
+
+def main() -> int:
+    logutil.setup()
+    agent = Agent(load_paths())
+    running = True
+
+    def stop(*_: Any) -> None:
+        nonlocal running
+        running = False
+
+    signal.signal(signal.SIGTERM, stop)
+    log.info("Kiosk-agent gestart")
+    while running:
+        try:
+            agent.tick()
+        except Exception:  # never die on an unexpected page state; systemd would only restart us
+            log.exception("Onverwachte fout in de kiosk-agent")
+        for _ in range(TICK_SECONDS * 2):
+            if not running:
+                break
+            time.sleep(0.5)
+    return 0

src/daynivo_kiosk/browser.py

@@ -0,0 +1,251 @@
+"""voxip-kiosk-browser — prepares the display and runs Chromium.
+
+Started by ``voxip-kiosk-browser.service`` as user ``kiosk`` once the X
+server is up. Exit status tells systemd whether to restart: 1 when
+``browser_restart`` is enabled (``Restart=on-failure`` restarts it and the
+start limit catches crash loops), 0 when it is disabled.
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+import os
+import re
+import shutil
+import socket
+import subprocess
+import time
+from pathlib import Path
+from typing import Any
+from urllib.parse import urlencode
+
+from . import logutil, sysinfo
+from .config import admin_url, load_config
+from .paths import Paths, load_paths
+from .validation import mask_url, parse_resolution
+
+log = logging.getLogger("voxip-kiosk-browser")
+
+CDP_PORT = 9222
+CHROMIUM_CANDIDATES = ("/usr/bin/chromium-browser", "/usr/bin/chromium")
+ROTATIONS = {0: "normal", 90: "right", 180: "inverted", 270: "left"}
+
+# Every flag here is deliberate; certificate validation is never weakened.
+BASE_FLAGS = [
+    "--kiosk",
+    "--noerrdialogs",
+    "--disable-infobars",
+    "--disable-session-crashed-bubble",
+    "--no-first-run",
+    "--no-default-browser-check",
+    "--disable-translate",
+    "--disable-features=Translate,TranslateUI,MediaRouter,OptimizationHints,HardwareMediaKeyHandling,GlobalMediaControls",
+    "--disable-component-update",
+    "--check-for-update-interval=31536000",
+    "--simulate-outdated-no-au=Tue, 31 Dec 2099 23:59:59 GMT",
+    "--disable-pinch",
+    "--overscroll-history-navigation=0",
+    "--autoplay-policy=no-user-gesture-required",
+    "--password-store=basic",
+    "--ozone-platform=x11",
+    "--window-position=0,0",
+    "--remote-debugging-address=127.0.0.1",
+    f"--remote-debugging-port={CDP_PORT}",
+]
+FORBIDDEN_FLAGS = ("--ignore-certificate-errors", "--ignore-ssl-errors", "--allow-insecure-localhost", "--disable-web-security", "--remote-debugging-address=0.0.0.0")
+
+
+def find_chromium() -> str:
+    for candidate in CHROMIUM_CANDIDATES:
+        if os.access(candidate, os.X_OK):
+            return candidate
+    raise SystemExit("Chromium is niet geïnstalleerd")
+
+
+def build_args(chromium: str, config: dict[str, Any], profile_dir: Path, cache_dir: Path, start_url: str,
+               window_size: tuple[int, int] | None = None) -> list[str]:
+    args = [chromium, *BASE_FLAGS,
+            f"--user-data-dir={profile_dir}",
+            f"--disk-cache-dir={cache_dir}",
+            "--disk-cache-size=33554432"]
+    if window_size:
+        args.append(f"--window-size={window_size[0]},{window_size[1]}")
+    zoom = float(config.get("zoom", 1.0))
+    if abs(zoom - 1.0) > 0.001:
+        args.append(f"--force-device-scale-factor={zoom:g}")
+    args.append(start_url)
+    assert not any(a.startswith(FORBIDDEN_FLAGS) for a in args)
+    return args
+
+
+def start_page_url(paths: Paths, config: dict[str, Any]) -> str:
+    query = urlencode({"name": config["device_name"], "next": config["url"], "url": mask_url(config["url"]),
+                       "admin": admin_url(config, socket.gethostname().split(".")[0])})
+    return f"file://{paths.www_dir}/start.html?{query}"
+
+
+# -- display -------------------------------------------------------------
+
+def parse_xrandr(output: str) -> list[dict[str, Any]]:
+    """Connected outputs with their modes from ``xrandr --query``."""
+    outputs: list[dict[str, Any]] = []
+    current: dict[str, Any] | None = None
+    for line in output.splitlines():
+        head = re.match(r"^(\S+) (connected|disconnected)(?: primary)?(?: (\d+)x(\d+)\+\d+\+\d+)?", line)
+        if head:
+            current = None
+            if head.group(2) == "connected":
+                current = {"name": head.group(1), "modes": [], "current": None, "preferred": None}
+                if head.group(3):
+                    current["size"] = (int(head.group(3)), int(head.group(4)))
+                outputs.append(current)
+            continue
+        mode = re.match(r"^\s+(\d+x\d+i?)\s+(.*)$", line)
+        if mode and current is not None:
+            name = mode.group(1)
+            rates = re.findall(r"(\d+\.\d+)([ *+]*)", mode.group(2))
+            if name not in current["modes"]:
+                current["modes"].append(name)
+            for rate, marks in rates:
+                if "*" in marks:
+                    current["current"] = f"{name}@{rate}"
+                if "+" in marks and current["preferred"] is None:
+                    current["preferred"] = name
+    return outputs
+
+
+def xrandr_args(output: dict[str, Any], config: dict[str, Any]) -> list[str]:
+    args = ["xrandr", "--output", output["name"]]
+    res = parse_resolution(config.get("resolution", "auto"))
+    if res and res[0] in output["modes"]:
+        args += ["--mode", res[0]]
+        if res[1]:
+            args += ["--rate", res[1]]
+    else:
+        if res:
+            log.warning("Resolutie %s niet ondersteund door %s; automatisch gekozen", config["resolution"], output["name"])
+        args.append("--auto")
+    args += ["--rotate", ROTATIONS.get(int(config.get("rotation", 0)), "normal")]
+    return args
+
+
+def xset_commands(config: dict[str, Any]) -> list[list[str]]:
+    if config.get("screen_always_on", True):
+        return [["xset", "s", "off"], ["xset", "s", "noblank"], ["xset", "-dpms"]]
+    seconds = int(config.get("screen_off_minutes", 10)) * 60
+    return [["xset", "s", "off"], ["xset", "+dpms"], ["xset", "dpms", "0", "0", str(seconds)]]
+
+
+def _run(args: list[str]) -> subprocess.CompletedProcess | None:
+    try:
+        return subprocess.run(args, capture_output=True, text=True, timeout=15)
+    except (OSError, subprocess.SubprocessError) as exc:
+        log.warning("%s mislukt: %s", args[0], exc)
+        return None
+
+
+def wait_for_x(timeout: float = 60) -> bool:
+    deadline = time.monotonic() + timeout
+    while time.monotonic() < deadline:
+        proc = _run(["xset", "q"])
+        if proc is not None and proc.returncode == 0:
+            return True
+        time.sleep(1)
+    return False
+
+
+BOOT_GRACE_SECONDS = 180
+
+
+def prepare_display(paths: Paths, config: dict[str, Any]) -> tuple[int, int] | None:
+    outputs: list[dict[str, Any]] = []
+    # A monitor that powers up together with the Pi may need a moment to report
+    # itself. Later starts (a browser restart without a screen) should not wait.
+    attempts = 15 if (sysinfo.uptime_seconds() or 0) < BOOT_GRACE_SECONDS else 1
+    for attempt in range(attempts):
+        if attempt:
+            time.sleep(2)
+        proc = _run(["xrandr", "--query"])
+        outputs = parse_xrandr(proc.stdout) if proc and proc.returncode == 0 else []
+        if outputs:
+            break
+    size = None
+    if outputs:
+        output = outputs[0]
+        proc = _run(xrandr_args(output, config))
+        if proc is not None and proc.returncode != 0:
+            log.warning("xrandr: %s", proc.stderr.strip())
+        refreshed = _run(["xrandr", "--query"])
+        if refreshed and refreshed.returncode == 0:
+            outputs = parse_xrandr(refreshed.stdout) or outputs
+            output = outputs[0]
+        size = output.get("size")
+    else:
+        log.warning("Geen aangesloten scherm gevonden")
+    for cmd in xset_commands(config):
+        _run(cmd)
+    info = {"outputs": outputs, "rotation": config.get("rotation", 0), "updated": int(time.time())}
+    try:
+        paths.display_info_file.write_text(json.dumps(info), encoding="utf-8")
+    except OSError as exc:
+        log.warning("Kon schermgegevens niet opslaan: %s", exc)
+    return size
+
+
+# -- profile -------------------------------------------------------------
+
+def clean_profile(profile_dir: Path) -> None:
+    """Remove stale locks and the 'did not shut down correctly' flag left by a crash or power cut."""
+    for name in ("SingletonLock", "SingletonSocket", "SingletonCookie"):
+        try:
+            (profile_dir / name).unlink()
+        except FileNotFoundError:
+            pass
+        except OSError as exc:
+            log.warning("Kon %s niet verwijderen: %s", name, exc)
+    prefs = profile_dir / "Default" / "Preferences"
+    try:
+        data = json.loads(prefs.read_text(encoding="utf-8"))
+    except (OSError, ValueError):
+        return
+    profile = data.setdefault("profile", {})
+    profile["exit_type"] = "Normal"
+    profile["exited_cleanly"] = True
+    tmp = prefs.with_suffix(".voxip-tmp")
+    tmp.write_text(json.dumps(data), encoding="utf-8")
+    os.replace(tmp, prefs)
+
+
+def profile_dirs(config: dict[str, Any]) -> tuple[Path, Path]:
+    runtime = Path(os.environ.get("RUNTIME_DIRECTORY", "/run/voxip-kiosk-browser"))
+    state = Path(os.environ.get("STATE_DIRECTORY", "/var/lib/voxip-kiosk-browser"))
+    profile = state / "profile" if config.get("browser_profile") == "persistent" else runtime / "profile"
+    if config.get("browser_profile") != "persistent" and (state / "profile").exists():
+        shutil.rmtree(state / "profile", ignore_errors=True)
+    cache = runtime / "cache"
+    profile.mkdir(parents=True, exist_ok=True, mode=0o700)
+    cache.mkdir(parents=True, exist_ok=True, mode=0o700)
+    return profile, cache
+
+
+def main() -> int:
+    logutil.setup()
+    paths = load_paths()
+    config = load_config(paths.config_file)
+    if not wait_for_x():
+        log.error("X-server niet bereikbaar")
+        return 1
+    size = prepare_display(paths, config)
+    profile, cache = profile_dirs(config)
+    clean_profile(profile)
+    args = build_args(find_chromium(), config, profile, cache, start_page_url(paths, config), size)
+    log.info("Chromium starten (profiel: %s, zoom: %s, rotatie: %s°)", config["browser_profile"], config["zoom"], config["rotation"])
+    started = time.monotonic()
+    code = subprocess.call(args)
+    lifetime = time.monotonic() - started
+    if config.get("browser_restart", True):
+        log.warning("Chromium gestopt (exitcode %s na %.0f s); systemd start opnieuw", code, lifetime)
+        return 1
+    log.warning("Chromium gestopt (exitcode %s); automatisch herstarten staat uit", code)
+    return 0

src/daynivo_kiosk/cdp.py

@@ -0,0 +1,126 @@
+"""Minimal Chrome DevTools Protocol client for the local kiosk browser.
+
+Chromium listens on 127.0.0.1 only (``--remote-debugging-address``); this
+client refuses any other host. Each call opens a short-lived WebSocket to
+the page target, which keeps the client stateless and robust against
+browser restarts.
+"""
+
+from __future__ import annotations
+
+import base64
+import itertools
+import json
+import urllib.request
+from typing import Any
+
+DEFAULT_PORT = 9222
+_LOCAL_HOSTS = {"127.0.0.1", "localhost", "::1"}
+
+
+class CDPError(Exception):
+    pass
+
+
+class CDP:
+    def __init__(self, host: str = "127.0.0.1", port: int = DEFAULT_PORT, timeout: float = 5.0):
+        if host not in _LOCAL_HOSTS:
+            raise ValueError("DevTools is alleen lokaal bereikbaar")
+        self.host = host
+        self.port = port
+        self.timeout = timeout
+        self._ids = itertools.count(1)
+
+    # -- HTTP endpoints -------------------------------------------------
+
+    def _http_json(self, path: str, method: str = "GET") -> Any:
+        req = urllib.request.Request(f"http://{self.host}:{self.port}{path}", method=method)
+        try:
+            with urllib.request.urlopen(req, timeout=self.timeout) as resp:
+                return json.loads(resp.read().decode("utf-8"))
+        except (OSError, ValueError) as exc:
+            raise CDPError(f"DevTools niet bereikbaar: {exc}") from exc
+
+    def version(self) -> dict[str, Any]:
+        return self._http_json("/json/version")
+
+    def pages(self) -> list[dict[str, Any]]:
+        return [t for t in self._http_json("/json/list") if t.get("type") == "page"]
+
+    def main_page(self) -> dict[str, Any] | None:
+        pages = self.pages()
+        return pages[0] if pages else None
+
+    def new_page(self, url: str) -> dict[str, Any]:
+        from urllib.parse import quote
+
+        return self._http_json("/json/new?" + quote(url, safe=""), method="PUT")
+
+    # -- WebSocket commands ---------------------------------------------
+
+    def call(self, ws_url: str, method: str, params: dict[str, Any] | None = None, timeout: float | None = None) -> dict[str, Any]:
+        try:
+            import websocket  # websocket-client (python3-websocket)
+        except ImportError as exc:  # pragma: no cover - dependency missing
+            raise CDPError("python3-websocket is niet geïnstalleerd") from exc
+
+        msg_id = next(self._ids)
+        try:
+            # Chromium rejects DevTools WebSockets that carry a foreign Origin;
+            # we send none at all.
+            ws = websocket.create_connection(ws_url, timeout=timeout or self.timeout, suppress_origin=True)
+        except Exception as exc:
+            raise CDPError(f"Verbinding met DevTools mislukt: {exc}") from exc
+        try:
+            ws.send(json.dumps({"id": msg_id, "method": method, "params": params or {}}))
+            while True:
+                reply = json.loads(ws.recv())
+                if reply.get("id") == msg_id:
+                    break
+        except Exception as exc:
+            raise CDPError(f"DevTools-opdracht {method} mislukt: {exc}") from exc
+        finally:
+            try:
+                ws.close()
+            except Exception:
+                pass
+        if "error" in reply:
+            raise CDPError(f"{method}: {reply['error'].get('message', reply['error'])}")
+        return reply.get("result", {})
+
+    def _page_ws(self) -> str:
+        page = self.main_page()
+        if not page or not page.get("webSocketDebuggerUrl"):
+            raise CDPError("Geen browserpagina gevonden")
+        return page["webSocketDebuggerUrl"]
+
+    def current_url(self) -> str | None:
+        page = self.main_page()
+        return page.get("url") if page else None
+
+    def navigate(self, url: str) -> None:
+        self.call(self._page_ws(), "Page.navigate", {"url": url})
+
+    def reload(self, ignore_cache: bool = False) -> None:
+        self.call(self._page_ws(), "Page.reload", {"ignoreCache": ignore_cache})
+
+    def responsive(self, ws_url: str | None = None, timeout: float = 5.0) -> bool:
+        """True when the page's renderer still executes JavaScript."""
+        try:
+            result = self.call(ws_url or self._page_ws(), "Runtime.evaluate", {"expression": "1+1", "returnByValue": True}, timeout=timeout)
+        except CDPError:
+            return False
+        return result.get("result", {}).get("value") == 2
+
+    def screenshot(self, quality: int = 70) -> bytes:
+        result = self.call(self._page_ws(), "Page.captureScreenshot", {"format": "jpeg", "quality": quality}, timeout=15)
+        try:
+            return base64.b64decode(result["data"])
+        except (KeyError, ValueError) as exc:
+            raise CDPError("Ongeldige screenshot ontvangen") from exc
+
+    def close_browser(self) -> None:
+        ws_url = self.version().get("webSocketDebuggerUrl")
+        if not ws_url:
+            raise CDPError("Geen browser-endpoint gevonden")
+        self.call(ws_url, "Browser.close")

src/daynivo_kiosk/config.py

@@ -0,0 +1,257 @@
+"""Kiosk configuration: defaults, validation and atomic persistence.
+
+``load_config`` never raises: a missing, corrupt or partially invalid file
+falls back to the ``.bak`` copy and then to defaults per key, so a bad edit
+can never keep the kiosk from booting. ``save_config`` validates the whole
+result before anything touches the disk.
+"""
+
+from __future__ import annotations
+
+import copy
+import fcntl
+import json
+import logging
+import os
+import tempfile
+import threading
+from pathlib import Path
+from typing import Any, Callable
+
+from . import validation as v
+
+log = logging.getLogger(__name__)
+
+DEFAULTS: dict[str, Any] = {
+    "device_name": "Daynivo Kiosk",
+    "url": "https://schermen-ijsselflat.voxip.nl",
+    "refresh_interval": 0,
+    "screen_always_on": True,
+    "screen_off_minutes": 10,
+    "rotation": 0,
+    "resolution": "auto",
+    "zoom": 1.0,
+    "browser_restart": True,
+    "browser_profile": "persistent",
+    "admin_port": 8080,
+    "admin_https": False,
+    "admin_allow_public": False,
+    "auto_update": False,
+}
+
+
+def _bool(value: Any) -> bool:
+    if isinstance(value, bool):
+        return value
+    raise v.ValidationError("Verwacht ja/nee.")
+
+
+def _int_range(lo: int, hi: int, message: str, allow_zero: bool = False) -> Callable[[Any], int]:
+    def check(value: Any) -> int:
+        if isinstance(value, bool) or not isinstance(value, (int, float, str)):
+            raise v.ValidationError(message)
+        try:
+            number = int(value)
+        except (TypeError, ValueError):
+            raise v.ValidationError(message) from None
+        if allow_zero and number == 0:
+            return 0
+        if not lo <= number <= hi:
+            raise v.ValidationError(message)
+        return number
+
+    return check
+
+
+def _rotation(value: Any) -> int:
+    try:
+        number = int(value)
+    except (TypeError, ValueError):
+        number = -1
+    if isinstance(value, bool) or number not in (0, 90, 180, 270):
+        raise v.ValidationError("Rotatie moet 0, 90, 180 of 270 graden zijn.")
+    return number
+
+
+def _zoom(value: Any) -> float:
+    try:
+        number = round(float(value), 2)
+    except (TypeError, ValueError):
+        number = -1.0
+    if isinstance(value, bool) or not 0.25 <= number <= 4.0:
+        raise v.ValidationError("Zoomfactor moet tussen 0,25 en 4 liggen.")
+    return number
+
+
+def _choice(*options: str) -> Callable[[Any], str]:
+    def check(value: Any) -> str:
+        if value not in options:
+            raise v.ValidationError("Kies een van: " + ", ".join(options) + ".")
+        return value
+
+    return check
+
+
+def _str(fn: Callable[[str], Any]) -> Callable[[Any], Any]:
+    def check(value: Any) -> Any:
+        if not isinstance(value, str):
+            raise v.ValidationError("Verwacht tekst.")
+        return fn(value)
+
+    return check
+
+
+VALIDATORS: dict[str, Callable[[Any], Any]] = {
+    "device_name": _str(v.device_name),
+    "url": _str(v.kiosk_url),
+    "refresh_interval": _int_range(30, 86400, "Verversinterval: 0 (uit) of 30 tot 86400 seconden.", allow_zero=True),
+    "screen_always_on": _bool,
+    "screen_off_minutes": _int_range(1, 240, "Scherm uit na: 1 tot 240 minuten."),
+    "rotation": _rotation,
+    "resolution": _str(v.resolution),
+    "zoom": _zoom,
+    "browser_restart": _bool,
+    "browser_profile": _choice("persistent", "ephemeral"),
+    "admin_port": _int_range(1024, 65535, "Poort moet tussen 1024 en 65535 liggen."),
+    "admin_https": _bool,
+    "admin_allow_public": _bool,
+    "auto_update": _bool,
+}
+
+
+class ConfigError(Exception):
+    def __init__(self, errors: dict[str, str]):
+        super().__init__("; ".join(f"{k}: {m}" for k, m in errors.items()))
+        self.errors = errors
+
+
+def admin_url(config: dict[str, Any], hostname: str) -> str:
+    """Address of the web interface as shown on the kiosk screen."""
+    scheme = "https" if config["admin_https"] else "http"
+    return f"{scheme}://{hostname}.local:{config['admin_port']}"
+
+
+def validate(updates: dict[str, Any]) -> dict[str, Any]:
+    """Validate known keys in ``updates``; raise ConfigError listing every problem."""
+    clean: dict[str, Any] = {}
+    errors: dict[str, str] = {}
+    for key, value in updates.items():
+        check = VALIDATORS.get(key)
+        if check is None:
+            errors[key] = "Onbekende instelling."
+            continue
+        try:
+            clean[key] = check(value)
+        except v.ValidationError as exc:
+            errors[key] = str(exc)
+    if errors:
+        raise ConfigError(errors)
+    return clean
+
+
+def _read_json(path: Path) -> dict[str, Any] | None:
+    try:
+        with path.open(encoding="utf-8") as fh:
+            data = json.load(fh)
+    except FileNotFoundError:
+        return None
+    except (OSError, ValueError) as exc:
+        log.warning("Kan %s niet lezen: %s", path, exc)
+        return None
+    if not isinstance(data, dict):
+        log.warning("%s bevat geen JSON-object", path)
+        return None
+    return data
+
+
+def _read_raw(path: Path) -> dict[str, Any]:
+    data = _read_json(path)
+    if data is None and path.exists():
+        data = _read_json(path.with_suffix(path.suffix + ".bak"))
+        if data is not None:
+            log.warning("Configuratie hersteld uit %s.bak", path.name)
+    return data or {}
+
+
+def load_config(path: Path) -> dict[str, Any]:
+    """Effective configuration: defaults overlaid with every valid stored value."""
+    raw = _read_raw(path)
+    config = copy.deepcopy(DEFAULTS)
+    for key, value in raw.items():
+        check = VALIDATORS.get(key)
+        if check is None:
+            continue
+        try:
+            config[key] = check(value)
+        except v.ValidationError as exc:
+            log.warning("Ongeldige waarde voor %s in %s (%s); standaard gebruikt", key, path, exc)
+    return config
+
+
+def atomic_write(path: Path, content: bytes, mode: int = 0o640, owner: tuple[int, int] | None = None) -> None:
+    """Write ``content`` to ``path`` so readers see either the old or the new file, never a partial one."""
+    path = Path(path)
+    if owner is None and path.exists():
+        st = path.stat()
+        owner = (st.st_uid, st.st_gid)
+    fd, tmp = tempfile.mkstemp(prefix=f".{path.name}.", suffix=".tmp", dir=str(path.parent))
+    try:
+        with os.fdopen(fd, "wb") as fh:
+            fh.write(content)
+            fh.flush()
+            os.fsync(fh.fileno())
+        os.chmod(tmp, mode)
+        if owner is not None and os.geteuid() == 0:
+            os.chown(tmp, *owner)
+        os.replace(tmp, path)
+    except BaseException:
+        try:
+            os.unlink(tmp)
+        except FileNotFoundError:
+            pass
+        raise
+    dir_fd = os.open(str(path.parent), os.O_RDONLY)
+    try:
+        os.fsync(dir_fd)
+    finally:
+        os.close(dir_fd)
+
+
+def atomic_write_json(path: Path, data: Any, mode: int = 0o640, owner: tuple[int, int] | None = None) -> None:
+    content = (json.dumps(data, indent=2, ensure_ascii=False) + "\n").encode("utf-8")
+    atomic_write(path, content, mode=mode, owner=owner)
+
+
+_thread_lock = threading.Lock()
+
+
+def save_config(path: Path, updates: dict[str, Any]) -> dict[str, Any]:
+    """Validate ``updates``, merge them into the stored file and write it atomically.
+
+    Unknown keys already in the file are preserved; the previous version is
+    kept as ``config.json.bak``. Returns the new effective configuration.
+    """
+    clean = validate(updates)
+    path = Path(path)
+    lock_path = path.with_name(".config.lock")
+    with _thread_lock:
+        # Read-only is enough for flock and works for every writer (the web
+        # interface as voxip, the helper as root), whoever created the file.
+        lock_fd = os.open(str(lock_path), os.O_RDONLY | os.O_CREAT, 0o640)
+        try:
+            fcntl.flock(lock_fd, fcntl.LOCK_EX)
+            return _save_locked(path, clean)
+        finally:
+            os.close(lock_fd)
+
+
+def _save_locked(path: Path, clean: dict[str, Any]) -> dict[str, Any]:
+    raw = _read_raw(path)
+    if path.exists():
+        try:
+            atomic_write(path.with_suffix(path.suffix + ".bak"), path.read_bytes())
+        except OSError as exc:
+            log.warning("Kon geen back-up van de configuratie maken: %s", exc)
+    raw.update(clean)
+    atomic_write_json(path, raw)
+    return load_config(path)

src/daynivo_kiosk/ctl.py

@@ -0,0 +1,164 @@
+"""daynivo-kiosk-ctl — command-line management over SSH (run with sudo)."""
+
+from __future__ import annotations
+
+import argparse
+import grp
+import json
+import os
+import pwd
+import subprocess
+import sys
+
+from . import services, setupcode
+from .agent import read_state
+from .cdp import CDP, CDPError
+from .config import ConfigError, load_config, save_config
+from .healthcheck import HealthCheck
+from .helper import Helper, HelperError
+from .paths import default_paths, read_version
+from .validation import mask_url
+
+
+def _require_root() -> None:
+    if os.geteuid() != 0:
+        sys.exit("Voer dit commando uit met sudo.")
+
+
+def cmd_status(args) -> int:
+    paths = default_paths()
+    config = load_config(paths.config_file)
+    agent = read_state(paths.agent_state_file)
+    print(f"Daynivo Kiosk OS {read_version(paths)}")
+    print(f"Apparaat:   {config['device_name']}")
+    print(f"URL:        {config['url'] if args.show_secrets else mask_url(config['url'])}")
+    print(f"Beheer:     {'https' if config['admin_https'] else 'http'}://{os.uname().nodename}.local:{config['admin_port']}")
+    print(f"Wachtwoord: {'ingesteld' if paths.admin_file.exists() else 'NOG NIET INGESTELD (setupcode: sudo daynivo-kiosk-ctl setup-code)'}")
+    for key, info in services.summary().items():
+        print(f"{info['unit']:<34} {info['label']} (herstarts: {info['restarts']})")
+    if agent:
+        print(f"Pagina:     {agent.get('page')}  bereikbaar: {agent.get('target_reachable')}  {agent.get('reason') or ''}")
+    return 0
+
+
+def cmd_setup_code(_args) -> int:
+    paths = default_paths()
+    if paths.admin_file.exists():
+        print("Er is al een beheerderswachtwoord ingesteld. Gebruik 'reset-password' om opnieuw te beginnen.")
+        return 1
+    code = setupcode.read(paths.setup_code_file)
+    if not code:
+        print("Nog geen setupcode; start de beheerinterface: sudo systemctl restart voxip-kiosk-manager")
+        return 1
+    print(code)
+    return 0
+
+
+def cmd_reset_password(args) -> int:
+    _require_root()
+    paths = default_paths()
+    if not args.yes:
+        answer = input("Beheerderswachtwoord verwijderen en een nieuwe setupcode maken? [j/N] ")
+        if answer.strip().lower() not in ("j", "ja", "y", "yes"):
+            return 1
+    paths.admin_file.unlink(missing_ok=True)
+    code = setupcode.generate()
+    setupcode.write(paths.setup_code_file, code)
+    try:
+        os.chown(paths.setup_code_file, pwd.getpwnam("voxip").pw_uid, grp.getgrnam("kiosk").gr_gid)
+    except KeyError:
+        pass
+    subprocess.run(["systemctl", "restart", "voxip-kiosk-manager.service"], check=False)
+    print(f"Wachtwoord verwijderd. Nieuwe setupcode: {code}")
+    print("Open de beheerinterface en stel een nieuw wachtwoord in; de code staat ook op het kioskscherm.")
+    return 0
+
+
+def cmd_set_url(args) -> int:
+    _require_root()
+    try:
+        config = save_config(default_paths().config_file, {"url": args.url})
+    except ConfigError as exc:
+        print("; ".join(exc.errors.values()), file=sys.stderr)
+        return 1
+    print(f"Kiosk-URL ingesteld: {mask_url(config['url'])}")
+    return 0
+
+
+def cmd_reload(_args) -> int:
+    try:
+        CDP().reload()
+    except CDPError as exc:
+        print(exc, file=sys.stderr)
+        return 1
+    print("Pagina wordt herladen.")
+    return 0
+
+
+def cmd_restart_browser(_args) -> int:
+    _require_root()
+    try:
+        print(Helper().restart_browser()["message"])
+    except HelperError as exc:
+        print(exc, file=sys.stderr)
+        return 1
+    return 0
+
+
+def cmd_health(_args) -> int:
+    report = HealthCheck(default_paths()).run(act=False)
+    print(json.dumps(report, indent=2, ensure_ascii=False))
+    return 0
+
+
+def cmd_maintenance(args) -> int:
+    _require_root()
+    flag = default_paths().health_run_dir / "maintenance"
+    if args.state == "on":
+        flag.parent.mkdir(parents=True, exist_ok=True)
+        flag.touch()
+        print("Onderhoudsmodus aan: de healthcheck herstart niets tot 'maintenance off' of een reboot.")
+    else:
+        flag.unlink(missing_ok=True)
+        print("Onderhoudsmodus uit.")
+    return 0
+
+
+def cmd_config(args) -> int:
+    config = load_config(default_paths().config_file)
+    if not args.show_secrets:
+        config["url"] = mask_url(config["url"])
+    print(json.dumps(config, indent=2, ensure_ascii=False))
+    return 0
+
+
+def cmd_version(_args) -> int:
+    print(read_version(default_paths()))
+    return 0
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(prog="daynivo-kiosk-ctl", description="Beheer van Daynivo Kiosk OS vanaf de commandoregel.")
+    sub = parser.add_subparsers(dest="command", required=True)
+    p = sub.add_parser("status", help="toon de status")
+    p.add_argument("--show-secrets", action="store_true", help="toon de volledige URL inclusief token")
+    p.set_defaults(func=cmd_status)
+    sub.add_parser("setup-code", help="toon de setupcode voor de eerste configuratie").set_defaults(func=cmd_setup_code)
+    p = sub.add_parser("reset-password", help="verwijder het beheerderswachtwoord (nieuwe setupcode)")
+    p.add_argument("-y", "--yes", action="store_true")
+    p.set_defaults(func=cmd_reset_password)
+    p = sub.add_parser("set-url", help="stel de kiosk-URL in")
+    p.add_argument("url")
+    p.set_defaults(func=cmd_set_url)
+    sub.add_parser("reload", help="herlaad de pagina").set_defaults(func=cmd_reload)
+    sub.add_parser("restart-browser", help="herstart Chromium").set_defaults(func=cmd_restart_browser)
+    sub.add_parser("health", help="healthcheck-rapport (zonder herstelacties)").set_defaults(func=cmd_health)
+    p = sub.add_parser("maintenance", help="onderhoudsmodus aan/uit")
+    p.add_argument("state", choices=("on", "off"))
+    p.set_defaults(func=cmd_maintenance)
+    p = sub.add_parser("config", help="toon de configuratie")
+    p.add_argument("--show-secrets", action="store_true")
+    p.set_defaults(func=cmd_config)
+    sub.add_parser("version", help="toon de versie").set_defaults(func=cmd_version)
+    args = parser.parse_args(argv)
+    return args.func(args)

src/daynivo_kiosk/healthcheck.py

@@ -0,0 +1,161 @@
+"""voxip-kiosk-healthcheck — runs every minute (timer) as root.
+
+Keeps every kiosk service alive without hiding problems: each recovery is
+logged, and a crash loop that hit systemd's start limit is retried only
+after a cool-down, so the journal shows the loop instead of an endless
+stream of restarts.
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import logging
+import subprocess
+import time
+from pathlib import Path
+from typing import Any
+
+from . import logutil, services, sysinfo
+from .cdp import CDP, CDPError
+from .config import load_config
+from .paths import Paths, load_paths
+
+log = logging.getLogger("voxip-kiosk-healthcheck")
+
+ALWAYS_ON = (services.AGENT_UNIT, services.MANAGER_UNIT)
+DISPLAY_UNITS = (services.X_UNIT, services.BROWSER_UNIT)
+DISPLAY_RETRY_AFTER = 300
+CDP_GRACE = 90
+CDP_FAILURES_BEFORE_RESTART = 3
+WARN_EVERY = 3600
+
+
+def _systemctl(*args: str) -> None:
+    try:
+        subprocess.run(["systemctl", *args], capture_output=True, timeout=30)
+    except (OSError, subprocess.SubprocessError) as exc:
+        log.error("systemctl %s mislukt: %s", " ".join(args), exc)
+
+
+class HealthCheck:
+    def __init__(self, paths: Paths, unit_status=services.unit_status, systemctl=_systemctl, cdp: Any = None,
+                 throttled=sysinfo.throttled, disk=sysinfo.disk, now=time.time):
+        self.paths = paths
+        self.unit_status = unit_status
+        self.systemctl = systemctl
+        self.cdp = cdp or CDP(timeout=4)
+        self.throttled = throttled
+        self.disk = disk
+        self.now = now
+
+    def load_state(self) -> dict[str, Any]:
+        try:
+            data = json.loads(self.paths.health_state_file.read_text(encoding="utf-8"))
+            return data if isinstance(data, dict) else {}
+        except (OSError, ValueError):
+            return {}
+
+    def save_state(self, state: dict[str, Any]) -> None:
+        try:
+            self.paths.health_state_file.parent.mkdir(parents=True, exist_ok=True)
+            self.paths.health_state_file.write_text(json.dumps(state), encoding="utf-8")
+        except OSError as exc:
+            log.warning("Kon healthcheck-status niet opslaan: %s", exc)
+
+    def maintenance(self) -> bool:
+        return (self.paths.health_run_dir / "maintenance").exists()
+
+    def run(self, act: bool = True) -> dict[str, Any]:
+        now = self.now()
+        state = self.load_state()
+        failed_since: dict[str, float] = state.setdefault("failed_since", {})
+        warned: dict[str, float] = state.setdefault("warned", {})
+        config = load_config(self.paths.config_file)
+        report: dict[str, Any] = {"units": {}, "actions": [], "maintenance": self.maintenance()}
+        act = act and not report["maintenance"]
+
+        for unit in (*DISPLAY_UNITS, *ALWAYS_ON):
+            props = self.unit_status(unit)
+            active = props.get("ActiveState", "unknown")
+            report["units"][unit] = active
+            is_display = unit in DISPLAY_UNITS
+            if active == "failed":
+                if unit not in failed_since:
+                    failed_since[unit] = now
+                    log.error("%s is in fouttoestand (resultaat: %s, herstarts: %s)", unit, props.get("Result"), props.get("NRestarts"))
+                if is_display and not config["browser_restart"]:
+                    continue
+                wait = DISPLAY_RETRY_AFTER if is_display else 0
+                if act and now - failed_since[unit] >= wait:
+                    log.warning("%s opnieuw starten na fouttoestand", unit)
+                    self.systemctl("reset-failed", unit)
+                    self.systemctl("start", "--no-block", unit)
+                    report["actions"].append(f"start {unit}")
+                    del failed_since[unit]
+            elif active == "inactive":
+                failed_since.pop(unit, None)
+                should_run = not is_display or config["browser_restart"]
+                if act and should_run:
+                    log.warning("%s draaide niet; wordt gestart", unit)
+                    self.systemctl("start", "--no-block", unit)
+                    report["actions"].append(f"start {unit}")
+            else:
+                failed_since.pop(unit, None)
+
+        self._check_devtools(state, report, now, act)
+        self._check_hardware(warned, report, now)
+        self.save_state(state)
+        return report
+
+    def _check_devtools(self, state: dict[str, Any], report: dict[str, Any], now: float, act: bool) -> None:
+        if report["units"].get(services.BROWSER_UNIT) != "active":
+            state.pop("browser_active_since", None)
+            state["cdp_failures"] = 0
+            return
+        since = state.setdefault("browser_active_since", now)
+        if now - since < CDP_GRACE:
+            return
+        try:
+            self.cdp.version()
+            state["cdp_failures"] = 0
+            report["devtools"] = "ok"
+        except CDPError:
+            state["cdp_failures"] = state.get("cdp_failures", 0) + 1
+            report["devtools"] = "geen antwoord"
+            log.warning("Chromium reageert niet op DevTools (%s keer achter elkaar)", state["cdp_failures"])
+            if act and state["cdp_failures"] >= CDP_FAILURES_BEFORE_RESTART:
+                log.error("Chromium wordt herstart: DevTools reageert niet")
+                self.systemctl("restart", "--no-block", services.BROWSER_UNIT)
+                report["actions"].append(f"restart {services.BROWSER_UNIT}")
+                state["cdp_failures"] = 0
+                state.pop("browser_active_since", None)
+
+    def _check_hardware(self, warned: dict[str, float], report: dict[str, Any], now: float) -> None:
+        throttle = self.throttled()
+        if throttle and throttle["now"]:
+            report["throttled"] = throttle["flags"]
+            if now - warned.get("throttled", 0) >= WARN_EVERY:
+                log.warning("Voeding/temperatuur: %s — controleer de voedingsadapter", ", ".join(throttle["flags"]))
+                warned["throttled"] = now
+        usage = self.disk("/")
+        if usage and usage["percent"] >= 90:
+            report["disk_percent"] = usage["percent"]
+            if now - warned.get("disk", 0) >= WARN_EVERY:
+                log.warning("SD-kaart is voor %s%% vol", usage["percent"])
+                warned["disk"] = now
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(prog="voxip-kiosk-healthcheck")
+    parser.add_argument("--check-only", action="store_true", help="alleen rapporteren, niets herstellen")
+    parser.add_argument("--json", action="store_true", help="rapport als JSON")
+    args = parser.parse_args(argv)
+    logutil.setup()
+    report = HealthCheck(load_paths()).run(act=not args.check_only)
+    if args.json:
+        print(json.dumps(report, indent=2, ensure_ascii=False))
+    else:
+        units = ", ".join(f"{Path(u).stem}={s}" for u, s in report["units"].items())
+        log.info("Healthcheck: %s%s", units, f"; acties: {', '.join(report['actions'])}" if report["actions"] else "")
+    return 0

src/daynivo_kiosk/helper.py

@@ -0,0 +1,474 @@
+"""voxip-kiosk-helper — the only privileged entry point of Daynivo Kiosk OS.
+
+Runs as root, either through ``sudo -n`` from the web interface (user
+``voxip``) or from systemd units. It accepts a fixed set of verbs, validates
+every argument itself, never invokes a shell and prints a single JSON
+object on stdout.
+
+Usage: voxip-kiosk-helper <verb> [args]   (network-apply reads JSON on stdin)
+"""
+
+from __future__ import annotations
+
+import grp
+import json
+import os
+import pwd
+import shutil
+import subprocess
+import sys
+import syslog
+import time
+from pathlib import Path
+from typing import Any, Callable
+
+from . import config as cfg
+from . import netconfig, updater
+from . import validation as v
+from .paths import Paths, default_paths
+
+HELPER_PATH = "/usr/lib/voxip-kiosk/voxip-kiosk-helper"
+ROLLBACK_UNIT = "voxip-network-rollback"
+UPDATE_UNIT = "voxip-kiosk-update-now"
+UPDATER_PATH = "/usr/lib/voxip-kiosk/voxip-kiosk-updater"
+ACTIVATE_UNIT = "voxip-network-activate"
+BOOT_DIRS = (Path("/boot/firmware"), Path("/boot"))
+# Files on the boot partition. The voxip-* names are from before the rename to
+# Daynivo and keep working, so existing SD cards and instructions stay valid.
+RESET_TRIGGERS = ("daynivo-network-reset", "voxip-network-reset")
+IMPORT_CONFIGS = ("voxip-config.json", "daynivo-config.json")  # applied in this order: the Daynivo name wins
+IMPORT_KEYS = ("voxip-authorized_keys", "daynivo-authorized_keys")
+SSH_KEY_TYPES = ("ssh-ed25519", "ssh-rsa", "ecdsa-sha2-", "sk-ssh-ed25519@openssh.com", "sk-ecdsa-sha2-")
+
+# Verbs the web interface may call through sudo. Everything else is only
+# reachable from systemd units or a root shell.
+PUBLIC_VERBS = {
+    "reboot", "poweroff", "restart-browser", "restart-manager", "set-hostname", "set-wifi-country",
+    "wifi-scan", "network-apply", "network-confirm", "network-rollback", "network-pending",
+    "update-check", "update-install",
+}
+
+
+class HelperError(Exception):
+    pass
+
+
+def log(priority: int, message: str) -> None:
+    syslog.syslog(priority, message)
+    print(message, file=sys.stderr)
+
+
+class Runner:
+    """subprocess wrapper; tests replace it with a recorder."""
+
+    def __call__(self, args: list[str], timeout: float = 30, check: bool = True, input: str | None = None) -> subprocess.CompletedProcess:
+        try:
+            proc = subprocess.run(args, capture_output=True, text=True, timeout=timeout, input=input)
+        except (OSError, subprocess.SubprocessError) as exc:
+            raise HelperError(f"{args[0]}: {exc}") from exc
+        if check and proc.returncode != 0:
+            raise HelperError(f"{' '.join(args[:3])} mislukt: {(proc.stderr or proc.stdout).strip()[:300]}")
+        return proc
+
+
+class Helper:
+    def __init__(self, paths: Paths | None = None, run: Callable[..., Any] | None = None,
+                 etc: Path = Path("/etc"), boot_dirs: tuple[Path, ...] = BOOT_DIRS, helper_path: str = HELPER_PATH):
+        self.paths = paths or default_paths()
+        self.run = run or Runner()
+        self.etc = etc
+        self.boot_dirs = boot_dirs
+        self.helper_path = helper_path
+
+    # -- power & browser -------------------------------------------------
+
+    def reboot(self) -> dict[str, Any]:
+        self.run(["systemd-run", "--on-active=3", "--unit=voxip-power-reboot", "/bin/systemctl", "reboot"])
+        log(syslog.LOG_NOTICE, "Herstart aangevraagd via beheerinterface")
+        return {"message": "De Raspberry Pi wordt over enkele seconden herstart."}
+
+    def poweroff(self) -> dict[str, Any]:
+        self.run(["systemd-run", "--on-active=3", "--unit=voxip-power-off", "/bin/systemctl", "poweroff"])
+        log(syslog.LOG_NOTICE, "Uitschakelen aangevraagd via beheerinterface")
+        return {"message": "De Raspberry Pi wordt over enkele seconden uitgeschakeld."}
+
+    def restart_browser(self) -> dict[str, Any]:
+        self.run(["systemctl", "reset-failed", "voxip-kiosk-browser.service", "voxip-kiosk-x.service"], check=False)
+        self.run(["systemctl", "restart", "--no-block", "voxip-kiosk-browser.service"])
+        log(syslog.LOG_NOTICE, "Chromium wordt herstart")
+        return {"message": "Chromium wordt herstart."}
+
+    def restart_manager(self) -> dict[str, Any]:
+        # Delayed so the web interface can still answer the request that asked for it.
+        self.run(["systemd-run", "--on-active=2", "--unit=voxip-manager-restart", "/bin/systemctl", "restart", "voxip-kiosk-manager.service"])
+        log(syslog.LOG_NOTICE, "Beheerinterface wordt herstart")
+        return {"message": "De beheerinterface wordt herstart."}
+
+    # -- software updates -----------------------------------------------
+
+    def update_check(self) -> dict[str, Any]:
+        state, _ = updater.Updater(self.paths).check()
+        return {"update": state}
+
+    def update_install(self) -> dict[str, Any]:
+        # A transient unit of its own: install.sh restarts the web interface, which
+        # must not take the running update down with it.
+        proc = self.run(["systemd-run", f"--unit={UPDATE_UNIT}", "--collect", "--quiet",
+                         UPDATER_PATH, "--install"], check=False)
+        if proc.returncode != 0:
+            raise HelperError("Er loopt al een update, of die kon niet worden gestart.")
+        log(syslog.LOG_NOTICE, "Update gestart via beheerinterface")
+        return {"message": "De update is gestart. De beheerinterface is zo meteen even niet bereikbaar."}
+
+    # -- hostname -------------------------------------------------------
+
+    def set_hostname(self, name: str) -> dict[str, Any]:
+        name = v.hostname(name)
+        cfg.atomic_write(self.etc / "hostname", (name + "\n").encode(), mode=0o644, owner=(0, 0))
+        hosts_file = self.etc / "hosts"
+        try:
+            lines = hosts_file.read_text(encoding="utf-8").splitlines()
+        except FileNotFoundError:
+            lines = ["127.0.0.1\tlocalhost"]
+        lines = [line for line in lines if not line.startswith("127.0.1.1")]
+        lines.append(f"127.0.1.1\t{name}")
+        cfg.atomic_write(hosts_file, ("\n".join(lines) + "\n").encode(), mode=0o644, owner=(0, 0))
+        self.run(["hostname", name], check=False)
+        self.run(["systemctl", "try-restart", "--no-block", "avahi-daemon.service"], check=False)
+        log(syslog.LOG_NOTICE, f"Hostname gewijzigd naar {name}")
+        return {"message": f"Hostname is nu {name}. Beheer bereikbaar via http://{name}.local.", "hostname": name}
+
+    # -- wifi -----------------------------------------------------------
+
+    def set_wifi_country(self, code: str) -> dict[str, Any]:
+        code = v.country_code(code)
+        if shutil.which("raspi-config"):
+            self.run(["raspi-config", "nonint", "do_wifi_country", code])
+        else:
+            self.run(["iw", "reg", "set", code])
+        self.run(["rfkill", "unblock", "wifi"], check=False)
+        log(syslog.LOG_NOTICE, f"Wifi-land ingesteld op {code}")
+        return {"message": f"Wifi-land ingesteld op {code}.", "country": code}
+
+    def wifi_scan(self) -> dict[str, Any]:
+        self.run(["rfkill", "unblock", "wifi"], check=False)
+        proc = self.run(["nmcli", "-t", "-f", "IN-USE,SSID,SIGNAL,SECURITY", "device", "wifi", "list", "ifname", "wlan0", "--rescan", "yes"], timeout=40)
+        return {"networks": netconfig.parse_wifi_scan(proc.stdout)}
+
+    # -- network change with rollback -------------------------------------
+
+    def _pending(self) -> dict[str, Any] | None:
+        try:
+            data = json.loads(self.paths.network_pending_file.read_text(encoding="utf-8"))
+        except (OSError, ValueError):
+            return None
+        return data if isinstance(data, dict) else None
+
+    def _keyfile_path(self, interface: str) -> Path:
+        return self.paths.nm_connections_dir / f"{netconfig.profile_name(interface)}.nmconnection"
+
+    def _existing_profile(self, interface: str):
+        try:
+            return netconfig.read_keyfile(self._keyfile_path(interface).read_text(encoding="utf-8"))
+        except (OSError, ValueError):
+            return None
+
+    def _active_uuids(self) -> list[str]:
+        proc = self.run(["nmcli", "-t", "-f", "UUID", "connection", "show", "--active"], check=False)
+        return [line.strip() for line in (proc.stdout or "").splitlines() if line.strip()]
+
+    def _snapshot(self) -> None:
+        backup = self.paths.network_backup_dir
+        if backup.exists():
+            shutil.rmtree(backup)
+        backup.mkdir(parents=True, mode=0o700)
+        for item in self.paths.nm_connections_dir.iterdir():
+            if item.is_file():
+                shutil.copy2(item, backup / item.name)
+
+    def _schedule(self, unit: str, delay: int, *args: str) -> None:
+        self.run(["systemctl", "stop", f"{unit}.timer", f"{unit}.service"], check=False)
+        self.run(["systemctl", "reset-failed", f"{unit}.timer", f"{unit}.service"], check=False)
+        self.run(["systemd-run", f"--unit={unit}", f"--on-active={delay}", "--timer-property=AccuracySec=1s", self.helper_path, *args])
+
+    def network_apply(self, payload: Any) -> dict[str, Any]:
+        req = netconfig.validate_request(payload)
+        if self._pending():
+            raise HelperError("Er staat al een netwerkwijziging open. Bevestig of draai die eerst terug.")
+        existing = self._existing_profile(req["interface"])
+        uuid = existing.get("connection", "uuid", fallback=None) if existing else None
+        psk = ""
+        if req["interface"] == "wlan0" and not req["wifi"]["open"]:
+            psk = req["wifi"]["psk"]
+            if not psk and existing is not None:
+                old_ssid = netconfig.unescape(existing.get("wifi", "ssid", fallback=""))
+                if old_ssid == req["wifi"]["ssid"]:
+                    psk = netconfig.unescape(existing.get("wifi-security", "psk", fallback=""))
+            if not psk:
+                raise HelperError("Vul het wifi-wachtwoord in.")
+        keyfile = netconfig.build_keyfile(req, uuid=uuid, psk=psk)
+
+        active_before = self._active_uuids()
+        self.paths.network_state_dir.mkdir(parents=True, exist_ok=True, mode=0o755)
+        self._snapshot()
+        now = int(time.time())
+        pending = {
+            "interface": req["interface"],
+            "method": req["method"],
+            "address": req.get("address", ""),
+            "created": now,
+            "deadline": now + netconfig.ROLLBACK_SECONDS,
+            "active_before": active_before,
+        }
+        try:
+            cfg.atomic_write_json(self.paths.network_pending_file, pending, mode=0o644, owner=(0, 0))
+            cfg.atomic_write(self._keyfile_path(req["interface"]), keyfile.encode("utf-8"), mode=0o600, owner=(0, 0))
+            self.run(["nmcli", "connection", "reload"])
+            self._schedule(ROLLBACK_UNIT, netconfig.ROLLBACK_SECONDS, "network-restore")
+            self._schedule(ACTIVATE_UNIT, 2, "network-activate", req["interface"])
+        except Exception:
+            self.network_restore()
+            raise
+        log(syslog.LOG_NOTICE, f"Netwerkwijziging voor {req['interface']} toegepast; rollback over {netconfig.ROLLBACK_SECONDS}s tenzij bevestigd")
+        return {"message": "Netwerkwijziging wordt toegepast.", "pending": pending}
+
+    def network_activate(self, interface: str) -> dict[str, Any]:
+        if interface not in netconfig.INTERFACES:
+            raise HelperError("Onbekende interface")
+        proc = self.run(["nmcli", "--wait", "45", "connection", "up", "id", netconfig.profile_name(interface)], timeout=60, check=False)
+        if proc.returncode != 0:
+            log(syslog.LOG_WARNING, f"Activeren van {netconfig.profile_name(interface)} mislukt: {(proc.stderr or '').strip()}")
+            return {"activated": False}
+        log(syslog.LOG_INFO, f"{netconfig.profile_name(interface)} geactiveerd")
+        return {"activated": True}
+
+    def network_confirm(self) -> dict[str, Any]:
+        if not self._pending():
+            return {"message": "Er stond geen wijziging open."}
+        self.run(["systemctl", "stop", f"{ROLLBACK_UNIT}.timer"], check=False)
+        self.paths.network_pending_file.unlink(missing_ok=True)
+        shutil.rmtree(self.paths.network_backup_dir, ignore_errors=True)
+        log(syslog.LOG_NOTICE, "Netwerkwijziging bevestigd")
+        return {"message": "Netwerkwijziging bevestigd."}
+
+    def network_rollback(self) -> dict[str, Any]:
+        """Public rollback: runs asynchronously so the HTTP response still arrives."""
+        if not self._pending():
+            return {"message": "Er stond geen wijziging open."}
+        self._schedule(ROLLBACK_UNIT, 1, "network-restore")
+        return {"message": "De vorige netwerkinstellingen worden teruggezet."}
+
+    def _restore_files(self) -> bool:
+        backup = self.paths.network_backup_dir
+        if not backup.is_dir():
+            log(syslog.LOG_ERR, "Geen netwerk-back-up gevonden; niets teruggezet")
+            return False
+        target = self.paths.nm_connections_dir
+        for item in target.iterdir():
+            if item.is_file():
+                item.unlink()
+        for item in backup.iterdir():
+            shutil.copy2(item, target / item.name)
+            os.chmod(target / item.name, 0o600)
+        return True
+
+    def network_restore(self, boot: bool = False) -> dict[str, Any]:
+        pending = self._pending()
+        if pending is None:
+            return {"message": "Er stond geen wijziging open."}
+        if not boot:
+            for iface in netconfig.INTERFACES:
+                self.run(["nmcli", "connection", "down", "id", netconfig.profile_name(iface)], check=False)
+        restored = self._restore_files()
+        if not boot and restored:
+            self.run(["nmcli", "connection", "reload"], check=False)
+            for uuid in pending.get("active_before", []):
+                if isinstance(uuid, str) and len(uuid) <= 64:
+                    self.run(["nmcli", "--wait", "30", "connection", "up", "uuid", uuid], timeout=45, check=False)
+        self.paths.network_pending_file.unlink(missing_ok=True)
+        shutil.rmtree(self.paths.network_backup_dir, ignore_errors=True)
+        if not boot:
+            self.run(["systemctl", "stop", f"{ROLLBACK_UNIT}.timer"], check=False)
+        log(syslog.LOG_WARNING, "Netwerkwijziging teruggedraaid" + (" bij opstarten" if boot else ""))
+        return {"message": "Vorige netwerkinstellingen teruggezet."}
+
+    def network_pending(self) -> dict[str, Any]:
+        return {"pending": self._pending()}
+
+    def _boot_dir(self) -> Path | None:
+        for d in self.boot_dirs:
+            if (d / "config.txt").exists() or (d / "cmdline.txt").exists():
+                return d
+        return None
+
+    def network_boot_guard(self) -> dict[str, Any]:
+        """Before NetworkManager starts: undo an unconfirmed change and honour the reset trigger."""
+        result: dict[str, Any] = {}
+        if self._pending():
+            self.network_restore(boot=True)
+            result["rolled_back"] = True
+        boot = self._boot_dir()
+        triggers = [boot / name for name in RESET_TRIGGERS if (boot / name).exists()] if boot else []
+        if triggers:
+            stash = self.paths.network_state_dir / f"disabled-{int(time.time())}"
+            stash.mkdir(parents=True, mode=0o700)
+            for iface in netconfig.INTERFACES:
+                src = self._keyfile_path(iface)
+                if src.exists():
+                    shutil.move(str(src), str(stash / src.name))
+            for trigger in triggers:
+                trigger.unlink()
+            log(syslog.LOG_WARNING, f"Netwerk-reset uitgevoerd; Daynivo-profielen verplaatst naar {stash}")
+            result["reset"] = True
+        return result
+
+    # -- provisioning from the boot partition ----------------------------
+
+    def _chown_config(self, path: Path) -> None:
+        try:
+            uid = pwd.getpwnam("voxip").pw_uid
+            gid = grp.getgrnam("kiosk").gr_gid
+        except KeyError:
+            return
+        os.chown(path, uid, gid)
+        os.chmod(path, 0o640)
+
+    def boot_import(self) -> dict[str, Any]:
+        boot = self._boot_dir()
+        if boot is None:
+            return {"imported": []}
+        imported = []
+        for name in IMPORT_CONFIGS:
+            conf = boot / name
+            if not conf.exists():
+                continue
+            try:
+                data = json.loads(conf.read_text(encoding="utf-8-sig"))
+                if not isinstance(data, dict):
+                    raise HelperError(f"{name} moet een JSON-object zijn")
+                data = dict(data)
+                host = data.pop("hostname", None)
+                country = data.pop("wifi_country", None)
+                if data:
+                    cfg.save_config(self.paths.config_file, data)
+                    self._chown_config(self.paths.config_file)
+                if host:
+                    self.set_hostname(str(host))
+                if country:
+                    self.set_wifi_country(str(country))
+                conf.rename(conf.with_name(name + ".applied"))
+                imported.append(name)
+                log(syslog.LOG_NOTICE, f"Configuratie geïmporteerd vanaf de bootpartitie ({name})")
+            except (HelperError, cfg.ConfigError, v.ValidationError, ValueError, OSError) as exc:
+                (boot / name.replace(".json", ".error.txt")).write_text(f"{exc}\n", encoding="utf-8")
+                conf.rename(conf.with_name(name + ".rejected"))
+                log(syslog.LOG_ERR, f"{name} geweigerd: {exc}")
+        for name in IMPORT_KEYS:
+            keys = boot / name
+            if not keys.exists():
+                continue
+            try:
+                self._import_ssh_keys(keys.read_text(encoding="utf-8-sig"))
+                keys.rename(keys.with_name(name + ".applied"))
+                imported.append(name)
+            except (HelperError, OSError) as exc:
+                keys.rename(keys.with_name(name + ".rejected"))
+                log(syslog.LOG_ERR, f"SSH-sleutels geweigerd ({name}): {exc}")
+        return {"imported": imported}
+
+    def _import_ssh_keys(self, text: str) -> None:
+        keys = [line.strip() for line in text.splitlines() if line.strip() and not line.startswith("#")]
+        if not keys or any(not k.startswith(SSH_KEY_TYPES) or len(k) > 8192 for k in keys):
+            raise HelperError("Bestand bevat geen geldige openbare SSH-sleutels")
+        user = next((u for u in pwd.getpwall() if u.pw_uid == 1000), None)
+        if user is None:
+            raise HelperError("Geen beheerdersaccount (uid 1000) gevonden")
+        ssh_dir = Path(user.pw_dir) / ".ssh"
+        ssh_dir.mkdir(mode=0o700, exist_ok=True)
+        auth = ssh_dir / "authorized_keys"
+        existing = auth.read_text(encoding="utf-8").splitlines() if auth.exists() else []
+        merged = existing + [k for k in keys if k not in existing]
+        cfg.atomic_write(auth, ("\n".join(merged) + "\n").encode(), mode=0o600, owner=(user.pw_uid, user.pw_gid))
+        os.chown(ssh_dir, user.pw_uid, user.pw_gid)
+        sshd_dir = self.etc / "ssh" / "sshd_config.d"
+        sshd_dir.mkdir(parents=True, exist_ok=True)
+        (sshd_dir / "voxip-kiosk.conf").write_text(
+            "# Beheerd door Daynivo Kiosk OS: alleen inloggen met SSH-sleutels.\n"
+            "PasswordAuthentication no\nKbdInteractiveAuthentication no\nPermitRootLogin no\n",
+            encoding="utf-8",
+        )
+        self.run(["systemctl", "enable", "ssh.service"], check=False)
+        self.run(["systemctl", "start", "--no-block", "ssh.service"], check=False)
+        log(syslog.LOG_NOTICE, f"{len(keys)} SSH-sleutel(s) geïnstalleerd voor {user.pw_name}; SSH ingeschakeld")
+
+    # -- dispatch ---------------------------------------------------------
+
+    def dispatch(self, verb: str, args: list[str], stdin: str = "") -> dict[str, Any]:
+        def one_arg() -> str:
+            if len(args) != 1:
+                raise HelperError(f"{verb} verwacht precies één argument")
+            return args[0]
+
+        def no_args() -> None:
+            if args:
+                raise HelperError(f"{verb} verwacht geen argumenten")
+
+        table: dict[str, Callable[[], dict[str, Any]]] = {
+            "reboot": lambda: (no_args(), self.reboot())[1],
+            "poweroff": lambda: (no_args(), self.poweroff())[1],
+            "restart-browser": lambda: (no_args(), self.restart_browser())[1],
+            "restart-manager": lambda: (no_args(), self.restart_manager())[1],
+            "set-hostname": lambda: self.set_hostname(one_arg()),
+            "set-wifi-country": lambda: self.set_wifi_country(one_arg()),
+            "wifi-scan": lambda: (no_args(), self.wifi_scan())[1],
+            "network-apply": lambda: (no_args(), self.network_apply(_parse_json(stdin)))[1],
+            "network-activate": lambda: self.network_activate(one_arg()),
+            "network-confirm": lambda: (no_args(), self.network_confirm())[1],
+            "network-rollback": lambda: (no_args(), self.network_rollback())[1],
+            "network-restore": lambda: (no_args(), self.network_restore())[1],
+            "network-pending": lambda: (no_args(), self.network_pending())[1],
+            "network-boot-guard": lambda: (no_args(), self.network_boot_guard())[1],
+            "boot-import": lambda: (no_args(), self.boot_import())[1],
+            "update-check": lambda: (no_args(), self.update_check())[1],
+            "update-install": lambda: (no_args(), self.update_install())[1],
+        }
+        if verb not in table:
+            raise HelperError(f"Onbekende opdracht: {verb}")
+        return table[verb]()
+
+
+def _parse_json(text: str) -> Any:
+    if len(text) > 16384:
+        raise HelperError("Invoer te groot")
+    try:
+        return json.loads(text)
+    except ValueError as exc:
+        raise HelperError("Ongeldige JSON-invoer") from exc
+
+
+def main(argv: list[str] | None = None, helper: Helper | None = None, environ: dict[str, str] | None = None) -> int:
+    argv = sys.argv[1:] if argv is None else argv
+    environ = os.environ if environ is None else environ
+    syslog.openlog("voxip-kiosk-helper", 0, syslog.LOG_DAEMON)
+    if not argv:
+        print(json.dumps({"ok": False, "error": "Gebruik: voxip-kiosk-helper <opdracht> [argumenten]"}))
+        return 2
+    verb, args = argv[0], argv[1:]
+    caller = environ.get("SUDO_USER")
+    if caller and verb not in PUBLIC_VERBS:
+        log(syslog.LOG_WARNING, f"Geweigerd: {caller} probeerde interne opdracht {verb}")
+        print(json.dumps({"ok": False, "error": "Opdracht niet toegestaan"}))
+        return 1
+    if helper is None and os.geteuid() != 0:
+        print(json.dumps({"ok": False, "error": "voxip-kiosk-helper moet als root draaien"}))
+        return 1
+    helper = helper or Helper()
+    stdin = sys.stdin.read(16385) if verb == "network-apply" else ""
+    try:
+        result = helper.dispatch(verb, args, stdin)
+    except (HelperError, v.ValidationError, cfg.ConfigError) as exc:
+        log(syslog.LOG_WARNING, f"{verb} mislukt: {exc}")
+        print(json.dumps({"ok": False, "error": str(exc)}, ensure_ascii=False))
+        return 1
+    print(json.dumps({"ok": True, **result}, ensure_ascii=False))
+    return 0

src/daynivo_kiosk/helper_client.py

@@ -0,0 +1,37 @@
+"""Calls the root helper through ``sudo -n`` with a fixed argument list."""
+
+from __future__ import annotations
+
+import json
+import subprocess
+from pathlib import Path
+from typing import Any
+
+
+class HelperError(Exception):
+    pass
+
+
+class HelperClient:
+    def __init__(self, helper_path: Path):
+        self.helper_path = str(helper_path)
+
+    def call(self, verb: str, *args: str, payload: Any = None, timeout: float = 60) -> dict[str, Any]:
+        cmd = ["sudo", "-n", self.helper_path, verb, *args]
+        try:
+            proc = subprocess.run(
+                cmd, input=json.dumps(payload) if payload is not None else "",
+                capture_output=True, text=True, timeout=timeout,
+            )
+        except subprocess.TimeoutExpired:
+            raise HelperError("De opdracht duurde te lang.") from None
+        except OSError as exc:
+            raise HelperError(f"Systeemhelper niet beschikbaar: {exc}") from None
+        try:
+            result = json.loads(proc.stdout.strip().splitlines()[-1])
+        except (ValueError, IndexError):
+            detail = (proc.stderr or "").strip().splitlines()
+            raise HelperError(detail[-1] if detail else "Onverwacht antwoord van de systeemhelper.") from None
+        if not result.get("ok"):
+            raise HelperError(result.get("error") or "Opdracht mislukt.")
+        return result

src/daynivo_kiosk/logutil.py

@@ -0,0 +1,23 @@
+"""Logging to stdout with sd-daemon priority prefixes, so journald records
+warnings and errors at the right level (``journalctl -p warning`` works)."""
+
+from __future__ import annotations
+
+import logging
+import sys
+
+_PRIORITY = {logging.DEBUG: 7, logging.INFO: 6, logging.WARNING: 4, logging.ERROR: 3, logging.CRITICAL: 2}
+
+
+class JournalFormatter(logging.Formatter):
+    def format(self, record: logging.LogRecord) -> str:
+        prio = _PRIORITY.get(record.levelno, 6)
+        return "\n".join(f"<{prio}>{line}" for line in super().format(record).splitlines() or [""])
+
+
+def setup(level: int = logging.INFO) -> None:
+    handler = logging.StreamHandler(sys.stdout)
+    handler.setFormatter(JournalFormatter("%(message)s"))
+    root = logging.getLogger()
+    root.handlers[:] = [handler]
+    root.setLevel(level)

src/daynivo_kiosk/manager.py

@@ -0,0 +1,69 @@
+"""voxip-kiosk-manager — starts the web interface under gunicorn.
+
+Reads port and HTTPS settings from the kiosk configuration, creates a
+self-signed certificate when HTTPS is enabled and none exists yet, then
+replaces itself with gunicorn (one worker so the login throttle is shared).
+"""
+
+from __future__ import annotations
+
+import logging
+import os
+import shutil
+import socket
+import subprocess
+import sys
+from pathlib import Path
+
+from . import logutil
+from .config import load_config
+from .paths import Paths, load_paths
+
+log = logging.getLogger("voxip-kiosk-manager")
+PYTHON_LIB = "/usr/lib/voxip-kiosk/python"
+
+
+def ensure_certificate(paths: Paths) -> tuple[Path, Path]:
+    cert, key = paths.tls_dir / "cert.pem", paths.tls_dir / "key.pem"
+    if cert.exists() and key.exists():
+        return cert, key
+    paths.tls_dir.mkdir(mode=0o700, exist_ok=True)
+    host = socket.gethostname()
+    log.info("Zelfondertekend certificaat aanmaken voor %s.local", host)
+    subprocess.run([
+        "openssl", "req", "-x509", "-newkey", "rsa:2048", "-nodes", "-days", "3650",
+        "-subj", f"/CN={host}.local/O=Daynivo Kiosk OS",
+        "-addext", f"subjectAltName=DNS:{host}.local,DNS:{host},IP:127.0.0.1",
+        "-keyout", str(key), "-out", str(cert),
+    ], check=True, capture_output=True, timeout=120)
+    os.chmod(key, 0o600)
+    return cert, key
+
+
+def gunicorn_argv(paths: Paths, config: dict) -> list[str]:
+    binary = shutil.which("gunicorn") or shutil.which("gunicorn3")
+    argv = [binary] if binary else [sys.executable, "-m", "gunicorn"]
+    bind = f"[::]:{config['admin_port']}" if Path("/proc/net/if_inet6").exists() else f"0.0.0.0:{config['admin_port']}"
+    argv += [
+        "--workers", "1", "--threads", "4", "--worker-class", "gthread",
+        "--bind", bind,
+        "--timeout", "90", "--graceful-timeout", "10", "--keep-alive", "5",
+        "--worker-tmp-dir", "/dev/shm",
+        "--error-logfile", "-", "--log-level", "warning",
+        "--pythonpath", PYTHON_LIB,
+    ]
+    if config["admin_https"]:
+        cert, key = ensure_certificate(paths)
+        argv += ["--certfile", str(cert), "--keyfile", str(key)]
+    argv.append("daynivo_kiosk.web:create_app()")
+    return argv
+
+
+def main() -> int:
+    logutil.setup()
+    paths = load_paths()
+    config = load_config(paths.config_file)
+    argv = gunicorn_argv(paths, config)
+    log.info("Daynivo Kiosk Manager start op poort %s (%s)", config["admin_port"], "HTTPS" if config["admin_https"] else "HTTP")
+    os.execv(argv[0], argv)
+    return 1  # not reached

src/daynivo_kiosk/netconfig.py

@@ -0,0 +1,181 @@
+"""NetworkManager configuration model used by the root helper.
+
+The helper writes keyfiles itself instead of passing settings to ``nmcli``
+on the command line: secrets never show up in the process list, and a
+rollback is a plain file restore.
+"""
+
+from __future__ import annotations
+
+import configparser
+import io
+import uuid as uuidlib
+from typing import Any
+
+from . import validation as v
+
+INTERFACES = {"eth0": "ethernet", "wlan0": "wifi"}
+PROFILE_PREFIX = "voxip-"
+ROLLBACK_SECONDS = 180
+
+
+def profile_name(interface: str) -> str:
+    return PROFILE_PREFIX + interface
+
+
+def validate_request(payload: Any) -> dict[str, Any]:
+    """Validate a network change request coming from the web interface."""
+    if not isinstance(payload, dict):
+        raise v.ValidationError("Ongeldig verzoek.")
+    interface = payload.get("interface")
+    if interface not in INTERFACES:
+        raise v.ValidationError("Onbekende netwerkinterface.")
+    method = payload.get("method")
+    if method not in ("dhcp", "static"):
+        raise v.ValidationError("Kies DHCP of een statisch adres.")
+    clean: dict[str, Any] = {"interface": interface, "method": method}
+    if method == "static":
+        clean["address"] = v.ipv4_interface(str(payload.get("address", "")))
+        gateway = str(payload.get("gateway", "")).strip()
+        if gateway:
+            import ipaddress
+
+            gw = v.ipv4_address(gateway)
+            if ipaddress.IPv4Address(gw) not in ipaddress.IPv4Interface(clean["address"]).network:
+                raise v.ValidationError("De gateway ligt niet in hetzelfde subnet als het IP-adres.")
+            clean["gateway"] = gw
+        else:
+            clean["gateway"] = ""
+    dns = payload.get("dns", [])
+    if not isinstance(dns, (list, str)):
+        raise v.ValidationError("Ongeldige DNS-servers.")
+    clean["dns"] = v.dns_servers(dns)
+    if method == "static" and not clean["dns"]:
+        raise v.ValidationError("Vul bij een statisch adres minimaal één DNS-server in.")
+    if interface == "wlan0":
+        wifi = payload.get("wifi")
+        if not isinstance(wifi, dict):
+            raise v.ValidationError("Wifi-gegevens ontbreken.")
+        psk = wifi.get("psk") or ""
+        clean["wifi"] = {
+            "ssid": v.ssid(str(wifi.get("ssid", ""))),
+            "psk": v.wifi_psk(psk) if psk else "",
+            "hidden": bool(wifi.get("hidden", False)),
+            "open": bool(wifi.get("open", False)),
+        }
+    return clean
+
+
+def _escape(value: str) -> str:
+    """Escape a value for a GLib key file (the format NetworkManager uses)."""
+    out = value.replace("\\", "\\\\").replace("\n", "\\n").replace("\t", "\\t").replace("\r", "\\r")
+    if out.startswith(" "):
+        out = "\\s" + out[1:]
+    return out
+
+
+def build_keyfile(req: dict[str, Any], uuid: str | None = None, psk: str = "") -> str:
+    """Render a NetworkManager keyfile for a validated request."""
+    interface = req["interface"]
+    name = profile_name(interface)
+    lines = [
+        "[connection]",
+        f"id={name}",
+        f"uuid={uuid or uuidlib.uuid4()}",
+        f"type={INTERFACES[interface]}",
+        f"interface-name={interface}",
+        "autoconnect=true",
+        "autoconnect-priority=100",
+        "",
+    ]
+    if interface == "wlan0":
+        wifi = req["wifi"]
+        lines += ["[wifi]", "mode=infrastructure", f"ssid={_escape(wifi['ssid'])}", f"hidden={'true' if wifi['hidden'] else 'false'}", ""]
+        if not wifi["open"]:
+            if not psk:
+                raise v.ValidationError("Vul het wifi-wachtwoord in.")
+            lines += ["[wifi-security]", "key-mgmt=wpa-psk", f"psk={_escape(psk)}", ""]
+    else:
+        lines += ["[ethernet]", ""]
+    lines.append("[ipv4]")
+    if req["method"] == "static":
+        lines.append("method=manual")
+        address = req["address"]
+        lines.append(f"address1={address},{req['gateway']}" if req.get("gateway") else f"address1={address}")
+    else:
+        lines.append("method=auto")
+    if req["dns"]:
+        ipv4_dns = [d for d in req["dns"] if ":" not in d]
+        if ipv4_dns:
+            lines.append("dns=" + ";".join(ipv4_dns) + ";")
+            lines.append("ignore-auto-dns=true")
+    lines += ["", "[ipv6]", "addr-gen-mode=default", "method=auto"]
+    ipv6_dns = [d for d in req["dns"] if ":" in d]
+    if ipv6_dns:
+        lines.append("dns=" + ";".join(ipv6_dns) + ";")
+    lines += ["", "[proxy]", ""]
+    return "\n".join(lines)
+
+
+def read_keyfile(text: str) -> configparser.ConfigParser:
+    parser = configparser.ConfigParser(interpolation=None, strict=False)
+    parser.optionxform = str  # keep key case
+    parser.read_file(io.StringIO(text))
+    return parser
+
+
+def unescape(value: str) -> str:
+    out, i = [], 0
+    mapping = {"\\": "\\", "n": "\n", "t": "\t", "r": "\r", "s": " "}
+    while i < len(value):
+        ch = value[i]
+        if ch == "\\" and i + 1 < len(value) and value[i + 1] in mapping:
+            out.append(mapping[value[i + 1]])
+            i += 2
+        else:
+            out.append(ch)
+            i += 1
+    return "".join(out)
+
+
+def split_terse(line: str) -> list[str]:
+    """Split one line of ``nmcli -t`` output, honouring ``\\:`` and ``\\\\`` escapes."""
+    fields, current, i = [], [], 0
+    while i < len(line):
+        ch = line[i]
+        if ch == "\\" and i + 1 < len(line):
+            current.append(line[i + 1])
+            i += 2
+            continue
+        if ch == ":":
+            fields.append("".join(current))
+            current = []
+        else:
+            current.append(ch)
+        i += 1
+    fields.append("".join(current))
+    return fields
+
+
+def parse_wifi_scan(output: str) -> list[dict[str, Any]]:
+    """Parse ``nmcli -t -f IN-USE,SSID,SIGNAL,SECURITY device wifi list``."""
+    networks: dict[str, dict[str, Any]] = {}
+    for line in output.splitlines():
+        fields = split_terse(line)
+        if len(fields) < 4:
+            continue
+        in_use, ssid, signal, security = fields[:4]
+        if not ssid:
+            continue
+        try:
+            strength = int(signal)
+        except ValueError:
+            strength = 0
+        entry = {"ssid": ssid, "signal": strength, "security": security.strip() or "open", "in_use": in_use.strip() == "*"}
+        current = networks.get(ssid)
+        if current is None or strength > current["signal"]:
+            entry["in_use"] = entry["in_use"] or bool(current and current["in_use"])
+            networks[ssid] = entry
+        elif entry["in_use"]:
+            current["in_use"] = True
+    return sorted(networks.values(), key=lambda n: (-n["in_use"], -n["signal"], n["ssid"].lower()))

src/daynivo_kiosk/netinfo.py

@@ -0,0 +1,127 @@
+"""Network status for the web interface (read-only, no privileges needed)."""
+
+from __future__ import annotations
+
+import json
+import re
+import shutil
+import subprocess
+from pathlib import Path
+from typing import Any
+
+from .netconfig import INTERFACES, profile_name, split_terse
+
+STATE_LABELS = {
+    "connected": "Verbonden",
+    "connecting": "Bezig met verbinden",
+    "disconnected": "Niet verbonden",
+    "unavailable": "Niet beschikbaar",
+    "unmanaged": "Niet beheerd",
+}
+
+
+def _nmcli(*args: str) -> str | None:
+    if not shutil.which("nmcli"):
+        return None
+    try:
+        proc = subprocess.run(["nmcli", *args], capture_output=True, text=True, timeout=10)
+    except (OSError, subprocess.SubprocessError):
+        return None
+    return proc.stdout if proc.returncode == 0 else None
+
+
+def device_details(device: str) -> dict[str, Any]:
+    out = _nmcli("-t", "device", "show", device)
+    info: dict[str, Any] = {"addresses": [], "dns": [], "gateway": "", "hwaddr": "", "state": "", "connection": ""}
+    if not out:
+        return info
+    for line in out.splitlines():
+        key, _, value = line.partition(":")
+        value = value.replace("\\:", ":")
+        base = key.split("[", 1)[0]
+        if base == "IP4.ADDRESS" and value:
+            info["addresses"].append(value)
+        elif base == "IP4.DNS" and value:
+            info["dns"].append(value)
+        elif base == "IP4.GATEWAY" and value and value != "--":
+            info["gateway"] = value
+        elif base == "GENERAL.HWADDR":
+            info["hwaddr"] = value
+        elif base == "GENERAL.STATE":
+            info["state"] = re.sub(r"^\d+\s*", "", value).strip("() ")
+        elif base == "GENERAL.CONNECTION" and value != "--":
+            info["connection"] = value
+    return info
+
+
+def profile_settings(interface: str) -> dict[str, Any]:
+    """Current settings of our own profile, used to pre-fill the forms."""
+    out = _nmcli("-t", "-f", "ipv4.method,ipv4.addresses,ipv4.gateway,ipv4.dns,802-11-wireless.ssid,802-11-wireless.hidden",
+                 "connection", "show", profile_name(interface))
+    settings = {"exists": False, "method": "dhcp", "address": "", "gateway": "", "dns": "", "ssid": "", "hidden": False}
+    if not out:
+        return settings
+    settings["exists"] = True
+    for line in out.splitlines():
+        key, _, value = line.partition(":")
+        value = value.replace("\\:", ":")
+        if value == "--":
+            value = ""
+        if key == "ipv4.method":
+            settings["method"] = "static" if value == "manual" else "dhcp"
+        elif key == "ipv4.addresses":
+            settings["address"] = value.split(",")[0].strip()
+        elif key == "ipv4.gateway":
+            settings["gateway"] = value
+        elif key == "ipv4.dns":
+            settings["dns"] = ", ".join(x for x in value.split(",") if x)
+        elif key == "802-11-wireless.ssid":
+            settings["ssid"] = value
+        elif key == "802-11-wireless.hidden":
+            settings["hidden"] = value == "yes"
+    return settings
+
+
+def overview() -> dict[str, Any]:
+    available = shutil.which("nmcli") is not None
+    devices = {}
+    status = _nmcli("-t", "-f", "DEVICE,TYPE,STATE,CONNECTION", "device", "status") or ""
+    present = {split_terse(line)[0]: split_terse(line) for line in status.splitlines() if line}
+    for iface, kind in INTERFACES.items():
+        fields = present.get(iface)
+        details = device_details(iface) if fields else {}
+        state = fields[2] if fields and len(fields) > 2 else ""
+        devices[iface] = {
+            "interface": iface,
+            "kind": kind,
+            "present": fields is not None,
+            "state": state,
+            "state_label": STATE_LABELS.get(state, state or "Niet aanwezig"),
+            "connected": state == "connected",
+            "connection": fields[3] if fields and len(fields) > 3 and fields[3] != "--" else "",
+            "addresses": details.get("addresses", []),
+            "gateway": details.get("gateway", ""),
+            "dns": details.get("dns", []),
+            "hwaddr": details.get("hwaddr", ""),
+            "profile": profile_settings(iface) if available else {},
+        }
+    return {"available": available, "devices": devices, "wifi_country": wifi_country()}
+
+
+def wifi_country() -> str:
+    if not shutil.which("iw"):
+        return ""
+    try:
+        out = subprocess.run(["iw", "reg", "get"], capture_output=True, text=True, timeout=5).stdout
+    except (OSError, subprocess.SubprocessError):
+        return ""
+    match = re.search(r"country ([A-Z0-9]{2}):", out)
+    return match.group(1) if match and match.group(1) != "00" else ""
+
+
+def pending_change(pending_file: Path) -> dict[str, Any] | None:
+    try:
+        data = json.loads(pending_file.read_text(encoding="utf-8"))
+    except (OSError, ValueError):
+        return None
+    return data if isinstance(data, dict) else None

src/daynivo_kiosk/paths.py

@@ -0,0 +1,118 @@
+"""Filesystem locations used by every Daynivo Kiosk component.
+
+The defaults match the installed layout. Unprivileged components may
+override them through ``VOXIP_*`` environment variables (used by the test
+suite and for local development). The root helper always uses
+:func:`default_paths` and never reads the environment.
+"""
+
+from __future__ import annotations
+
+import os
+from dataclasses import dataclass
+from pathlib import Path
+
+
+@dataclass(frozen=True)
+class Paths:
+    config_dir: Path = Path("/etc/voxip-kiosk")
+    state_dir: Path = Path("/var/lib/voxip-kiosk")
+    network_state_dir: Path = Path("/var/lib/voxip-kiosk-network")
+    agent_run_dir: Path = Path("/run/voxip-kiosk-agent")
+    browser_run_dir: Path = Path("/run/voxip-kiosk-browser")
+    health_run_dir: Path = Path("/run/voxip-kiosk-health")
+    share_dir: Path = Path("/usr/share/voxip-kiosk")
+    log_dir: Path = Path("/var/log/voxip-kiosk")
+    helper: Path = Path("/usr/lib/voxip-kiosk/voxip-kiosk-helper")
+    nm_connections_dir: Path = Path("/etc/NetworkManager/system-connections")
+
+    @property
+    def config_file(self) -> Path:
+        return self.config_dir / "config.json"
+
+    @property
+    def admin_file(self) -> Path:
+        return self.config_dir / "admin.json"
+
+    @property
+    def setup_code_file(self) -> Path:
+        # Lives in the config dir (group kiosk) so the agent can show it on
+        # the HDMI screen during initial setup.
+        return self.config_dir / "setup-code"
+
+    @property
+    def tls_dir(self) -> Path:
+        return self.config_dir / "tls"
+
+    @property
+    def secret_key_file(self) -> Path:
+        return self.state_dir / "secret_key"
+
+    @property
+    def network_pending_file(self) -> Path:
+        return self.network_state_dir / "pending.json"
+
+    @property
+    def network_backup_dir(self) -> Path:
+        return self.network_state_dir / "backup"
+
+    @property
+    def agent_state_file(self) -> Path:
+        return self.agent_run_dir / "state.json"
+
+    @property
+    def display_info_file(self) -> Path:
+        return self.browser_run_dir / "display.json"
+
+    @property
+    def health_state_file(self) -> Path:
+        return self.health_run_dir / "state.json"
+
+    @property
+    def www_dir(self) -> Path:
+        return self.share_dir / "www"
+
+    @property
+    def version_file(self) -> Path:
+        return self.share_dir / "VERSION"
+
+    @property
+    def update_state_file(self) -> Path:
+        return self.state_dir / "update.json"
+
+    @property
+    def audit_log(self) -> Path:
+        return self.log_dir / "audit.log"
+
+
+def default_paths() -> Paths:
+    return Paths()
+
+
+_ENV = {
+    "config_dir": "VOXIP_CONFIG_DIR",
+    "state_dir": "VOXIP_STATE_DIR",
+    "network_state_dir": "VOXIP_NETWORK_STATE_DIR",
+    "agent_run_dir": "VOXIP_AGENT_RUN_DIR",
+    "browser_run_dir": "VOXIP_BROWSER_RUN_DIR",
+    "health_run_dir": "VOXIP_HEALTH_RUN_DIR",
+    "share_dir": "VOXIP_SHARE_DIR",
+    "log_dir": "VOXIP_LOG_DIR",
+    "helper": "VOXIP_HELPER",
+}
+
+
+def load_paths() -> Paths:
+    overrides = {field: Path(os.environ[env]) for field, env in _ENV.items() if os.environ.get(env)}
+    return Paths(**overrides)
+
+
+def read_version(paths: Paths) -> str:
+    try:
+        return paths.version_file.read_text(encoding="utf-8").strip() or "onbekend"
+    except OSError:
+        here = Path(__file__).resolve().parents[2] / "VERSION"
+        try:
+            return here.read_text(encoding="utf-8").strip() + "-dev"
+        except OSError:
+            return "dev"

src/daynivo_kiosk/services.py

@@ -0,0 +1,100 @@
+"""Read-only access to systemd unit state and the journal."""
+
+from __future__ import annotations
+
+import subprocess
+from typing import Any
+
+BROWSER_UNIT = "voxip-kiosk-browser.service"
+X_UNIT = "voxip-kiosk-x.service"
+AGENT_UNIT = "voxip-kiosk-agent.service"
+MANAGER_UNIT = "voxip-kiosk-manager.service"
+HEALTH_UNIT = "voxip-kiosk-healthcheck.service"
+
+# Units whose logs the web interface may show (label → journalctl -u args).
+LOG_SOURCES: dict[str, tuple[str, list[str]]] = {
+    "kiosk": ("Kiosk (Chromium, X, agent)", [BROWSER_UNIT, X_UNIT, AGENT_UNIT]),
+    "browser": ("Chromium", [BROWSER_UNIT]),
+    "agent": ("Kiosk-agent", [AGENT_UNIT]),
+    "health": ("Healthcheck", [HEALTH_UNIT]),
+    "manager": ("Beheerinterface", [MANAGER_UNIT]),
+    "network": ("Netwerk", ["NetworkManager.service", "voxip-network-guard.service", "voxip-network-rollback.service", "voxip-network-activate.service"]),
+    "system": ("Volledig systeem", []),
+}
+LOG_LINES = (50, 100, 200, 500)
+
+_SHOW_PROPS = "ActiveState,SubState,Result,NRestarts,ActiveEnterTimestamp,ExecMainStatus,LoadState"
+
+
+def unit_status(unit: str) -> dict[str, str]:
+    try:
+        out = subprocess.run(
+            ["systemctl", "show", unit, "--no-pager", "-p", _SHOW_PROPS],
+            capture_output=True, text=True, timeout=5,
+        ).stdout
+    except (OSError, subprocess.SubprocessError):
+        return {}
+    return parse_show(out)
+
+
+def parse_show(output: str) -> dict[str, str]:
+    props = {}
+    for line in output.splitlines():
+        key, sep, value = line.partition("=")
+        if sep:
+            props[key] = value
+    return props
+
+
+def describe(props: dict[str, str]) -> tuple[str, str]:
+    """(status, Dutch label) for a unit: status ∈ ok / starting / stopped / error / unknown."""
+    active = props.get("ActiveState")
+    if not active:
+        return "unknown", "Onbekend"
+    if active == "active":
+        return "ok", "Actief"
+    if active in ("activating", "reloading"):
+        return "starting", "Bezig met starten"
+    if active == "failed":
+        return "error", "Fout"
+    if active == "deactivating":
+        return "starting", "Bezig met stoppen"
+    if props.get("Result", "success") not in ("success", ""):
+        return "error", "Gestopt na fout"
+    return "stopped", "Gestopt"
+
+
+def journal(source: str, lines: int = 100, priority: str | None = None) -> str:
+    if source not in LOG_SOURCES:
+        raise ValueError("onbekende logbron")
+    lines = lines if lines in LOG_LINES else 100
+    cmd = ["journalctl", "--no-pager", "-o", "short-iso", "-n", str(lines)]
+    for unit in LOG_SOURCES[source][1]:
+        cmd += ["-u", unit]
+    if priority in ("err", "warning"):
+        cmd += ["-p", priority]
+    try:
+        proc = subprocess.run(cmd, capture_output=True, text=True, timeout=15)
+    except (OSError, subprocess.SubprocessError) as exc:
+        return f"Logs konden niet worden gelezen: {exc}"
+    return proc.stdout or proc.stderr or "(geen regels)"
+
+
+def recent_errors(lines: int = 20) -> list[str]:
+    """Warnings and errors logged by the kiosk agent, browser launcher and healthcheck."""
+    cmd = ["journalctl", "--no-pager", "-o", "short-iso", "-n", str(lines), "-p", "warning",
+           "-u", AGENT_UNIT, "-u", BROWSER_UNIT, "-u", HEALTH_UNIT, "-u", X_UNIT]
+    try:
+        out = subprocess.run(cmd, capture_output=True, text=True, timeout=10).stdout
+    except (OSError, subprocess.SubprocessError):
+        return []
+    return [line for line in out.splitlines() if line and not line.startswith("-- ")]
+
+
+def summary() -> dict[str, Any]:
+    result = {}
+    for key, unit in (("browser", BROWSER_UNIT), ("x", X_UNIT), ("agent", AGENT_UNIT), ("manager", MANAGER_UNIT)):
+        props = unit_status(unit)
+        status, label = describe(props)
+        result[key] = {"unit": unit, "status": status, "label": label, "restarts": props.get("NRestarts", "0"), "since": props.get("ActiveEnterTimestamp", "")}
+    return result

src/daynivo_kiosk/setupcode.py

@@ -0,0 +1,42 @@
+"""One-time setup code that guards the initial admin password."""
+
+from __future__ import annotations
+
+import hmac
+import os
+import secrets
+from pathlib import Path
+
+ALPHABET = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789"  # no 0/O/1/I confusion on screen
+
+
+def generate() -> str:
+    raw = "".join(secrets.choice(ALPHABET) for _ in range(8))
+    return f"{raw[:4]}-{raw[4:]}"
+
+
+def normalise(code: str) -> str:
+    cleaned = "".join(ch for ch in (code or "").upper() if ch.isalnum())
+    return f"{cleaned[:4]}-{cleaned[4:]}" if len(cleaned) == 8 else cleaned
+
+
+def write(path: Path, code: str) -> None:
+    """Store the code readable for group kiosk (the setup screen) only."""
+    fd = os.open(str(path), os.O_WRONLY | os.O_CREAT | os.O_TRUNC, 0o640)
+    with os.fdopen(fd, "w", encoding="utf-8") as fh:
+        fh.write(code + "\n")
+    os.chmod(path, 0o640)
+
+
+def read(path: Path) -> str | None:
+    try:
+        return path.read_text(encoding="utf-8").strip() or None
+    except OSError:
+        return None
+
+
+def matches(path: Path, candidate: str) -> bool:
+    stored = read(path)
+    if not stored:
+        return False
+    return hmac.compare_digest(stored.encode(), normalise(candidate).encode())

src/daynivo_kiosk/sysinfo.py

@@ -0,0 +1,201 @@
+"""System metrics for the dashboard, read without any privileges."""
+
+from __future__ import annotations
+
+import json
+import os
+import shutil
+import subprocess
+import threading
+import time
+from pathlib import Path
+from typing import Any
+
+_cpu_lock = threading.Lock()
+_cpu_prev: tuple[int, int] | None = None
+
+
+def _read(path: str) -> str | None:
+    try:
+        return Path(path).read_text(encoding="utf-8")
+    except OSError:
+        return None
+
+
+def uptime_seconds(proc: str = "/proc") -> float | None:
+    raw = _read(f"{proc}/uptime")
+    try:
+        return float(raw.split()[0]) if raw else None
+    except (ValueError, IndexError):
+        return None
+
+
+def load_average() -> tuple[float, float, float] | None:
+    try:
+        return os.getloadavg()
+    except OSError:
+        return None
+
+
+def _cpu_times(proc: str) -> tuple[int, int] | None:
+    raw = _read(f"{proc}/stat")
+    if not raw:
+        return None
+    fields = raw.splitlines()[0].split()
+    if not fields or fields[0] != "cpu":
+        return None
+    values = [int(x) for x in fields[1:]]
+    idle = values[3] + (values[4] if len(values) > 4 else 0)
+    return sum(values), idle
+
+
+def cpu_percent(proc: str = "/proc") -> float | None:
+    """CPU usage since the previous call (first call: since boot)."""
+    global _cpu_prev
+    now = _cpu_times(proc)
+    if now is None:
+        return None
+    with _cpu_lock:
+        prev, _cpu_prev = _cpu_prev, now
+    total, idle = now
+    if prev is not None and total > prev[0]:
+        total, idle = total - prev[0], idle - prev[1]
+    if total <= 0:
+        return None
+    return round(100.0 * (1 - idle / total), 1)
+
+
+def temperature_c(sys: str = "/sys") -> float | None:
+    raw = _read(f"{sys}/class/thermal/thermal_zone0/temp")
+    try:
+        return round(int(raw.strip()) / 1000, 1) if raw else None
+    except ValueError:
+        return None
+
+
+def memory(proc: str = "/proc") -> dict[str, Any] | None:
+    raw = _read(f"{proc}/meminfo")
+    if not raw:
+        return None
+    info = {}
+    for line in raw.splitlines():
+        key, _, rest = line.partition(":")
+        try:
+            info[key] = int(rest.split()[0]) * 1024
+        except (ValueError, IndexError):
+            continue
+    total = info.get("MemTotal")
+    avail = info.get("MemAvailable")
+    if not total or avail is None:
+        return None
+    used = total - avail
+    return {"total": total, "used": used, "percent": round(100 * used / total, 1)}
+
+
+def disk(path: str = "/") -> dict[str, Any] | None:
+    try:
+        usage = shutil.disk_usage(path)
+    except OSError:
+        return None
+    return {"total": usage.total, "used": usage.used, "percent": round(100 * usage.used / usage.total, 1)}
+
+
+THROTTLE_FLAGS = {
+    0: "Onderspanning",
+    1: "Frequentie begrensd",
+    2: "Afgeknepen (throttled)",
+    3: "Temperatuurlimiet",
+    16: "Onderspanning opgetreden",
+    17: "Frequentiebegrenzing opgetreden",
+    18: "Afknijpen opgetreden",
+    19: "Temperatuurlimiet opgetreden",
+}
+
+
+def parse_throttled(output: str) -> dict[str, Any] | None:
+    _, _, value = output.strip().partition("=")
+    try:
+        bits = int(value, 16)
+    except ValueError:
+        return None
+    flags = [label for bit, label in THROTTLE_FLAGS.items() if bits & (1 << bit)]
+    return {"raw": hex(bits), "now": bool(bits & 0xF), "ever": bool(bits & 0xF0000), "flags": flags}
+
+
+def throttled() -> dict[str, Any] | None:
+    """Power/thermal throttling as reported by the firmware (needs group video)."""
+    if not shutil.which("vcgencmd"):
+        return None
+    try:
+        out = subprocess.run(["vcgencmd", "get_throttled"], capture_output=True, text=True, timeout=3, check=True).stdout
+    except (OSError, subprocess.SubprocessError):
+        return None
+    return parse_throttled(out)
+
+
+def ip_addresses() -> dict[str, list[str]]:
+    """Global addresses per interface, e.g. ``{"eth0": ["192.168.1.20/24"]}``."""
+    try:
+        out = subprocess.run(["ip", "-j", "addr", "show"], capture_output=True, text=True, timeout=3, check=True).stdout
+        data = json.loads(out)
+    except (OSError, subprocess.SubprocessError, ValueError):
+        return {}
+    return parse_ip_json(data)
+
+
+def parse_ip_json(data: list[dict[str, Any]]) -> dict[str, list[str]]:
+    result: dict[str, list[str]] = {}
+    for iface in data:
+        name = iface.get("ifname", "")
+        if name == "lo":
+            continue
+        addrs = [
+            f"{a['local']}/{a['prefixlen']}"
+            for a in iface.get("addr_info", [])
+            if a.get("scope") == "global" and "local" in a
+        ]
+        if addrs:
+            result[name] = addrs
+    return result
+
+
+def os_release() -> str:
+    raw = _read("/etc/os-release") or ""
+    for line in raw.splitlines():
+        if line.startswith("PRETTY_NAME="):
+            return line.split("=", 1)[1].strip().strip('"')
+    return "onbekend"
+
+
+def model() -> str:
+    raw = _read("/proc/device-tree/model")
+    return raw.strip("\x00\n ") if raw else "onbekend"
+
+
+def format_duration(seconds: float | None) -> str:
+    if seconds is None:
+        return "–"
+    seconds = int(seconds)
+    days, rem = divmod(seconds, 86400)
+    hours, rem = divmod(rem, 3600)
+    minutes = rem // 60
+    if days:
+        return f"{days} d {hours} u {minutes} min"
+    if hours:
+        return f"{hours} u {minutes} min"
+    return f"{minutes} min"
+
+
+def format_bytes(value: int | None) -> str:
+    if value is None:
+        return "–"
+    size = float(value)
+    for unit in ("B", "KB", "MB", "GB", "TB"):
+        if size < 1024 or unit == "TB":
+            return f"{size:.0f} {unit}" if unit in ("B", "KB") else f"{size:.1f} {unit}".replace(".", ",")
+        size /= 1024
+    return f"{value} B"
+
+
+def timestamp() -> float:
+    return time.time()

src/daynivo_kiosk/updater.py

@@ -0,0 +1,244 @@
+"""voxip-kiosk-updater — installs new Daynivo Kiosk OS releases (runs as root).
+
+A release is a tag ``vX.Y.Z`` on the Gitea repository with two assets:
+``daynivo-kiosk-os-X.Y.Z.tar.gz`` and its ``.sha256``. The updater
+
+* checks the latest release and records the result in ``update.json`` in the
+  state directory (the web interface shows it),
+* downloads and verifies a newer release, unpacks it under
+  ``/opt/daynivo-kiosk-os/<version>`` and runs that release's
+  ``update.sh --no-pull`` (config backup + ``install.sh --upgrade``).
+
+It never installs an older or equal version. Usage::
+
+    voxip-kiosk-updater --check     # only check
+    voxip-kiosk-updater --auto      # check; install when auto_update is on (daily timer)
+    voxip-kiosk-updater --install   # check and install when newer (button in the web interface)
+"""
+
+from __future__ import annotations
+
+import argparse
+import hashlib
+import json
+import logging
+import re
+import shutil
+import ssl
+import subprocess
+import tarfile
+import tempfile
+import time
+import urllib.error
+import urllib.request
+from dataclasses import dataclass
+from pathlib import Path, PurePosixPath
+from typing import Any, Callable
+
+from . import logutil
+from .config import atomic_write_json, load_config
+from .paths import Paths, default_paths, read_version
+
+log = logging.getLogger("voxip-kiosk-updater")
+
+RELEASE_API = "https://git.rothman.nl/api/v1/repos/rothman/daynivo-kiosk-os/releases/latest"
+ASSET_PREFIX = "daynivo-kiosk-os-"
+RELEASE_DIR = Path("/opt/daynivo-kiosk-os")
+CACHE_DIR = Path("/var/cache/voxip-kiosk")
+KEEP_RELEASES = 2
+MAX_DOWNLOAD = 64 * 1024 * 1024
+USER_AGENT = "Daynivo-Kiosk-OS/updater"
+_VERSION = re.compile(r"^v?(\d+)\.(\d+)\.(\d+)$")
+
+
+class UpdateError(Exception):
+    pass
+
+
+@dataclass(frozen=True)
+class Release:
+    version: str
+    tarball_url: str
+    checksum_url: str
+    page_url: str
+
+
+def parse_version(text: str) -> tuple[int, int, int] | None:
+    match = _VERSION.match(text.strip())
+    return (int(match[1]), int(match[2]), int(match[3])) if match else None
+
+
+def is_newer(candidate: str, current: str) -> bool:
+    new, old = parse_version(candidate), parse_version(current.removesuffix("-dev"))
+    return new is not None and (old is None or new > old)
+
+
+def http_get(url: str, limit: int = MAX_DOWNLOAD, timeout: float = 30) -> bytes:
+    if not url.startswith("https://"):
+        raise UpdateError(f"Alleen HTTPS-downloads: {url}")
+    request = urllib.request.Request(url, headers={"User-Agent": USER_AGENT, "Accept": "application/json, */*"})
+    try:
+        with urllib.request.urlopen(request, timeout=timeout, context=ssl.create_default_context()) as response:
+            data = response.read(limit + 1)
+    except urllib.error.HTTPError as exc:
+        if exc.code == 404 and url == RELEASE_API:
+            raise UpdateError("Er is nog geen release gepubliceerd") from exc
+        raise UpdateError(f"Downloaden mislukt ({url}): HTTP {exc.code}") from exc
+    except OSError as exc:
+        raise UpdateError(f"Downloaden mislukt ({url}): {exc}") from exc
+    if len(data) > limit:
+        raise UpdateError(f"Download te groot: {url}")
+    return data
+
+
+def parse_release(data: dict[str, Any]) -> Release:
+    version = str(data.get("tag_name", "")).removeprefix("v")
+    if parse_version(version) is None:
+        raise UpdateError(f"Onbekend versienummer in release: {data.get('tag_name')!r}")
+    assets = {a.get("name"): a.get("browser_download_url") for a in data.get("assets") or [] if isinstance(a, dict)}
+    tarball = assets.get(f"{ASSET_PREFIX}{version}.tar.gz")
+    checksum = assets.get(f"{ASSET_PREFIX}{version}.tar.gz.sha256")
+    if not tarball or not checksum:
+        raise UpdateError(f"Release {version} mist het installatiebestand of de checksum")
+    return Release(version, tarball, checksum, str(data.get("html_url") or ""))
+
+
+def fetch_latest(get: Callable[[str], bytes] = http_get, api: str = RELEASE_API) -> Release:
+    try:
+        data = json.loads(get(api))
+    except ValueError as exc:
+        raise UpdateError("Ongeldig antwoord van de releaseserver") from exc
+    if not isinstance(data, dict):
+        raise UpdateError("Ongeldig antwoord van de releaseserver")
+    return parse_release(data)
+
+
+def read_state(paths: Paths) -> dict[str, Any]:
+    try:
+        data = json.loads(paths.update_state_file.read_text(encoding="utf-8"))
+    except (OSError, ValueError):
+        return {}
+    return data if isinstance(data, dict) else {}
+
+
+def safe_extract(archive: Path, target: Path) -> None:
+    """Unpack only regular files and directories that stay inside ``target``."""
+    with tarfile.open(archive, "r:gz") as tar:
+        members = tar.getmembers()
+        for member in members:
+            path = PurePosixPath(member.name)
+            if path.is_absolute() or ".." in path.parts or not (member.isfile() or member.isdir()):
+                raise UpdateError(f"Onveilig bestand in release: {member.name}")
+        tar.extractall(target, members=members)  # noqa: S202 - members checked above
+
+
+class Updater:
+    def __init__(self, paths: Paths | None = None, get: Callable[[str], bytes] = http_get,
+                 run: Callable[..., Any] = subprocess.run, release_dir: Path = RELEASE_DIR,
+                 cache_dir: Path = CACHE_DIR, now: Callable[[], float] = time.time):
+        self.paths = paths or default_paths()
+        self.get = get
+        self.run = run
+        self.release_dir = release_dir
+        self.cache_dir = cache_dir
+        self.now = now
+
+    def _write_state(self, **values: Any) -> dict[str, Any]:
+        state = {**read_state(self.paths), **values}
+        try:
+            atomic_write_json(self.paths.update_state_file, state, mode=0o644, owner=(0, 0))
+        except PermissionError:
+            atomic_write_json(self.paths.update_state_file, state, mode=0o644)
+        except OSError as exc:
+            log.warning("Kon updatestatus niet opslaan: %s", exc)
+        return state
+
+    def check(self) -> tuple[dict[str, Any], Release | None]:
+        current = read_version(self.paths)
+        try:
+            release = fetch_latest(self.get)
+        except UpdateError as exc:
+            log.warning("Controleren op updates mislukt: %s", exc)
+            return self._write_state(checked_at=int(self.now()), current=current, check_error=str(exc)), None
+        available = is_newer(release.version, current)
+        state = self._write_state(checked_at=int(self.now()), current=current, latest=release.version,
+                                  available=available, release_url=release.page_url, check_error=None)
+        if available:
+            log.info("Nieuwe versie beschikbaar: %s (geïnstalleerd: %s)", release.version, current)
+        return state, release if available else None
+
+    def install(self, release: Release) -> dict[str, Any]:
+        current = read_version(self.paths)
+        if not is_newer(release.version, current):
+            raise UpdateError(f"Versie {release.version} is niet nieuwer dan {current}")
+        self._write_state(status="updating", target=release.version, started_at=int(self.now()), install_error=None)
+        log.info("Bijwerken naar %s", release.version)
+        try:
+            folder = self._download(release)
+            proc = self.run([str(folder / "update.sh"), "--no-pull"], capture_output=True, text=True, timeout=3600)
+            if proc.returncode != 0:
+                tail = (proc.stderr or proc.stdout or "").strip().splitlines()[-5:]
+                raise UpdateError("Installatie mislukt: " + " / ".join(tail))
+        except (UpdateError, OSError, subprocess.SubprocessError) as exc:
+            log.error("Bijwerken naar %s mislukt: %s", release.version, exc)
+            return self._write_state(status="failed", finished_at=int(self.now()), install_error=str(exc))
+        self._prune(keep=release.version)
+        log.info("Bijgewerkt naar %s", release.version)
+        return self._write_state(status="done", finished_at=int(self.now()), current=release.version,
+                                 available=False, install_error=None)
+
+    def _download(self, release: Release) -> Path:
+        tarball = self.get(release.tarball_url)
+        expected = self.get(release.checksum_url, limit=4096).decode("ascii", "replace").split()
+        actual = hashlib.sha256(tarball).hexdigest()
+        if not expected or expected[0].lower() != actual:
+            raise UpdateError("Checksum klopt niet; de download wordt niet geïnstalleerd")
+
+        self.cache_dir.mkdir(parents=True, exist_ok=True)
+        self.release_dir.mkdir(parents=True, exist_ok=True)
+        with tempfile.TemporaryDirectory(dir=self.cache_dir) as tmp:
+            archive = Path(tmp) / "release.tar.gz"
+            archive.write_bytes(tarball)
+            unpacked = Path(tmp) / "unpacked"
+            safe_extract(archive, unpacked)
+            source = unpacked / f"{ASSET_PREFIX}{release.version}"
+            found = (source / "VERSION").read_text(encoding="utf-8").strip() if (source / "VERSION").exists() else None
+            if found != release.version:
+                raise UpdateError(f"Release bevat versie {found!r} in plaats van {release.version}")
+            target = self.release_dir / release.version
+            shutil.rmtree(target, ignore_errors=True)
+            shutil.move(str(source), target)
+        return target
+
+    def _prune(self, keep: str) -> None:
+        versions = sorted((p for p in self.release_dir.iterdir() if p.is_dir() and parse_version(p.name)),
+                          key=lambda p: parse_version(p.name), reverse=True)
+        for old in versions[KEEP_RELEASES:]:
+            if old.name != keep:
+                shutil.rmtree(old, ignore_errors=True)
+
+
+def main(argv: list[str] | None = None, updater: Updater | None = None) -> int:
+    parser = argparse.ArgumentParser(prog="voxip-kiosk-updater", description="Daynivo Kiosk OS bijwerken.")
+    mode = parser.add_mutually_exclusive_group(required=True)
+    mode.add_argument("--check", action="store_true", help="alleen controleren")
+    mode.add_argument("--auto", action="store_true", help="controleren en bijwerken als automatisch bijwerken aan staat")
+    mode.add_argument("--install", action="store_true", help="controleren en een nieuwere versie installeren")
+    args = parser.parse_args(argv)
+    logutil.setup()
+    updater = updater or Updater()
+
+    state, release = updater.check()
+    if args.check or release is None:
+        print(json.dumps(state, ensure_ascii=False))
+        return 1 if state.get("check_error") else 0
+    if args.auto:
+        if not load_config(updater.paths.config_file)["auto_update"]:
+            log.info("Automatisch bijwerken staat uit; %s wordt niet geïnstalleerd", release.version)
+            return 0
+        if (updater.paths.health_run_dir / "maintenance").exists():
+            log.info("Onderhoudsmodus actief; bijwerken overgeslagen")
+            return 0
+    state = updater.install(release)
+    print(json.dumps(state, ensure_ascii=False))
+    return 0 if state.get("status") == "done" else 1

src/daynivo_kiosk/validation.py

@@ -0,0 +1,195 @@
+"""Input validation shared by the web interface, the config loader and the
+root helper. Every validator either returns a normalised value or raises
+:class:`ValidationError` with a Dutch message suitable for the UI.
+"""
+
+from __future__ import annotations
+
+import ipaddress
+import re
+from urllib.parse import unquote_plus, urlsplit, urlunsplit
+
+
+class ValidationError(ValueError):
+    pass
+
+
+_CONTROL = re.compile(r"[\x00-\x1f\x7f]")
+_HOSTNAME = re.compile(r"^[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?$")
+_RESOLUTION = re.compile(r"^(\d{3,4})x(\d{3,4})(?:@(\d{2,3}(?:\.\d{1,3})?))?$")
+_COUNTRY = re.compile(r"^[A-Z]{2}$")
+_HEX64 = re.compile(r"^[0-9a-fA-F]{64}$")
+
+# Query parameters whose values are secrets (Daynivo display URLs carry
+# their access token as ?token=...). They are masked wherever a URL is shown
+# or logged.
+SECRET_PARAMS = {"token", "key", "apikey", "api_key", "secret", "password", "auth", "access_token"}
+
+
+def kiosk_url(value: str) -> str:
+    """A kiosk URL: HTTPS only, with a host, without embedded credentials."""
+    if not isinstance(value, str):
+        raise ValidationError("Ongeldige URL.")
+    url = value.strip()
+    if not url:
+        raise ValidationError("Vul een URL in.")
+    if len(url) > 2048:
+        raise ValidationError("De URL is te lang (maximaal 2048 tekens).")
+    if _CONTROL.search(url) or " " in url:
+        raise ValidationError("De URL mag geen spaties of stuurtekens bevatten.")
+    try:
+        parts = urlsplit(url)
+        port = parts.port
+    except ValueError:
+        raise ValidationError("De URL is ongeldig.") from None
+    if parts.scheme.lower() != "https":
+        raise ValidationError("Alleen HTTPS-URL's zijn toegestaan (https://…).")
+    if not parts.hostname:
+        raise ValidationError("De URL bevat geen hostnaam.")
+    if parts.username or parts.password:
+        raise ValidationError("Gebruikersnaam/wachtwoord in de URL is niet toegestaan.")
+    if port is not None and not 0 < port < 65536:
+        raise ValidationError("Ongeldige poort in de URL.")
+    host = parts.hostname
+    try:
+        ipaddress.ip_address(host)
+    except ValueError:
+        if not all(_HOSTNAME.match(label) for label in host.lower().rstrip(".").split(".")):
+            raise ValidationError("De hostnaam in de URL is ongeldig.") from None
+    return url
+
+
+def mask_url(url: str) -> str:
+    """Hide secret query parameter values: ``?token=abcdef1234`` → ``?token=…1234``."""
+    try:
+        parts = urlsplit(url)
+    except ValueError:
+        return url
+    if not parts.query:
+        return url
+    pairs = []
+    for pair in parts.query.split("&"):
+        key, sep, val = pair.partition("=")
+        if sep and val and unquote_plus(key).lower() in SECRET_PARAMS:
+            val = "…" + val[-4:] if len(val) > 8 else "…"
+        pairs.append(key + sep + val)
+    return urlunsplit(parts._replace(query="&".join(pairs)))
+
+
+def hostname(value: str) -> str:
+    name = (value or "").strip().lower()
+    if not _HOSTNAME.match(name):
+        raise ValidationError(
+            "Een hostname bestaat uit 1–63 tekens: kleine letters, cijfers en "
+            "koppeltekens, niet beginnend of eindigend met een koppelteken."
+        )
+    if name == "localhost":
+        raise ValidationError("'localhost' kan niet als hostname worden gebruikt.")
+    return name
+
+
+def device_name(value: str) -> str:
+    name = (value or "").strip()
+    if not name:
+        raise ValidationError("Vul een apparaatnaam in.")
+    if len(name) > 64 or _CONTROL.search(name):
+        raise ValidationError("De apparaatnaam mag maximaal 64 tekens bevatten, zonder stuurtekens.")
+    return name
+
+
+def resolution(value: str) -> str:
+    val = (value or "").strip().lower()
+    if val == "auto":
+        return val
+    match = _RESOLUTION.match(val)
+    if not match:
+        raise ValidationError("Gebruik 'auto' of een resolutie als 1920x1080 of 1920x1080@60.")
+    width, height = int(match.group(1)), int(match.group(2))
+    if not (320 <= width <= 4096 and 200 <= height <= 4096):
+        raise ValidationError("Resolutie buiten het ondersteunde bereik.")
+    return val
+
+
+def parse_resolution(value: str) -> tuple[str, str | None] | None:
+    """``"1920x1080@60"`` → ``("1920x1080", "60")``; ``"auto"`` → ``None``."""
+    if value == "auto":
+        return None
+    match = _RESOLUTION.match(value)
+    if not match:
+        return None
+    return f"{match.group(1)}x{match.group(2)}", match.group(3)
+
+
+def ipv4_address(value: str) -> str:
+    try:
+        addr = ipaddress.IPv4Address((value or "").strip())
+    except ValueError:
+        raise ValidationError(f"'{value}' is geen geldig IPv4-adres.") from None
+    if addr.is_multicast or addr.is_unspecified or addr.is_loopback:
+        raise ValidationError(f"'{value}' kan hier niet gebruikt worden.")
+    return str(addr)
+
+
+def ipv4_interface(value: str) -> str:
+    """``192.168.1.50/24`` (a host address with prefix length)."""
+    raw = (value or "").strip()
+    if "/" not in raw:
+        raise ValidationError("Vul het IP-adres in met prefixlengte, bijvoorbeeld 192.168.1.50/24.")
+    try:
+        iface = ipaddress.IPv4Interface(raw)
+    except ValueError:
+        raise ValidationError(f"'{raw}' is geen geldig IPv4-adres met prefix.") from None
+    if not 8 <= iface.network.prefixlen <= 32:
+        raise ValidationError("De prefixlengte moet tussen 8 en 32 liggen.")
+    if iface.network.prefixlen < 31 and iface.ip in (iface.network.network_address, iface.network.broadcast_address):
+        raise ValidationError("Het adres is een netwerk- of broadcastadres.")
+    ipv4_address(str(iface.ip))
+    return iface.with_prefixlen
+
+
+def dns_servers(values: list[str] | str) -> list[str]:
+    if isinstance(values, str):
+        values = re.split(r"[\s,;]+", values)
+    result: list[str] = []
+    for raw in values:
+        raw = raw.strip()
+        if not raw:
+            continue
+        try:
+            addr = ipaddress.ip_address(raw)
+        except ValueError:
+            raise ValidationError(f"'{raw}' is geen geldig DNS-serveradres.") from None
+        if str(addr) not in result:
+            result.append(str(addr))
+    if len(result) > 3:
+        raise ValidationError("Maximaal drie DNS-servers.")
+    return result
+
+
+def ssid(value: str) -> str:
+    val = value or ""
+    if not val:
+        raise ValidationError("Vul een netwerknaam (SSID) in.")
+    if len(val.encode("utf-8")) > 32:
+        raise ValidationError("Een SSID is maximaal 32 bytes.")
+    if _CONTROL.search(val):
+        raise ValidationError("De SSID bevat ongeldige tekens.")
+    return val
+
+
+def wifi_psk(value: str) -> str:
+    val = value or ""
+    if _HEX64.match(val):
+        return val
+    if not 8 <= len(val) <= 63:
+        raise ValidationError("Een wifi-wachtwoord is 8 tot 63 tekens (of 64 hexadecimale tekens).")
+    if any(not (32 <= ord(ch) <= 126) for ch in val):
+        raise ValidationError("Het wifi-wachtwoord mag alleen gewone ASCII-tekens bevatten.")
+    return val
+
+
+def country_code(value: str) -> str:
+    val = (value or "").strip().upper()
+    if not _COUNTRY.match(val):
+        raise ValidationError("Gebruik een landcode van twee letters, bijvoorbeeld NL.")
+    return val

src/daynivo_kiosk/web/__init__.py

@@ -0,0 +1,73 @@
+"""Daynivo Kiosk Manager — Flask application factory."""
+
+from __future__ import annotations
+
+import os
+import secrets
+from dataclasses import dataclass
+from datetime import timedelta
+from typing import Any
+
+from flask import Flask
+
+from ..cdp import CDP
+from ..config import load_config
+from ..helper_client import HelperClient
+from ..paths import Paths, load_paths, read_version
+from .auth import CredentialStore, LoginThrottle
+
+
+@dataclass
+class Services:
+    paths: Paths
+    credentials: CredentialStore
+    throttle: LoginThrottle
+    helper: Any
+    cdp: Any
+    version: str
+
+
+def _secret_key(paths: Paths) -> bytes:
+    path = paths.secret_key_file
+    try:
+        key = path.read_bytes()
+        if len(key) >= 32:
+            return key
+    except FileNotFoundError:
+        pass
+    key = secrets.token_bytes(64)
+    fd = os.open(str(path), os.O_WRONLY | os.O_CREAT | os.O_TRUNC, 0o600)
+    with os.fdopen(fd, "wb") as fh:
+        fh.write(key)
+    return key
+
+
+def create_app(paths: Paths | None = None, *, helper: Any = None, cdp: Any = None) -> Flask:
+    paths = paths or load_paths()
+    config = load_config(paths.config_file)
+    app = Flask(__name__)
+    app.secret_key = _secret_key(paths)
+    app.config.update(
+        SESSION_COOKIE_NAME="voxip_session",
+        SESSION_COOKIE_HTTPONLY=True,
+        SESSION_COOKIE_SAMESITE="Strict",
+        SESSION_COOKIE_SECURE=config["admin_https"],
+        PERMANENT_SESSION_LIFETIME=timedelta(hours=12),
+        MAX_CONTENT_LENGTH=64 * 1024,
+        TEMPLATES_AUTO_RELOAD=False,
+    )
+    credentials = CredentialStore(paths.admin_file, paths.setup_code_file)
+    credentials.ensure_setup_code()
+    app.extensions["voxip"] = Services(
+        paths=paths,
+        credentials=credentials,
+        throttle=LoginThrottle(),
+        helper=helper or HelperClient(paths.helper),
+        cdp=cdp or CDP(timeout=5),
+        version=read_version(paths),
+    )
+
+    from .views import bp
+
+    app.register_blueprint(bp)
+    return app

src/daynivo_kiosk/web/auth.py

@@ -0,0 +1,156 @@
+"""Admin credentials (Argon2id) and login throttling."""
+
+from __future__ import annotations
+
+import json
+import secrets
+import threading
+import time
+from collections import deque
+from pathlib import Path
+from typing import Any
+
+from argon2 import PasswordHasher, Type
+from argon2.exceptions import InvalidHash, VerificationError, VerifyMismatchError
+
+from .. import setupcode
+from ..config import atomic_write_json
+
+# 64 MiB / 3 passes / 2 lanes: ~0.5 s on a Raspberry Pi 3, fine for a single admin.
+HASHER = PasswordHasher(time_cost=3, memory_cost=65536, parallelism=2, hash_len=32, salt_len=16, type=Type.ID)
+
+MIN_LENGTH = 10
+MAX_LENGTH = 128
+WEAK = {"admin", "administrator", "password", "wachtwoord", "raspberry", "voxip", "kiosk", "welkom", "welcome", "qwerty", "123456"}
+
+
+def password_problem(password: str, confirm: str | None = None) -> str | None:
+    if confirm is not None and password != confirm:
+        return "De wachtwoorden komen niet overeen."
+    if len(password) < MIN_LENGTH:
+        return f"Gebruik minimaal {MIN_LENGTH} tekens."
+    if len(password) > MAX_LENGTH:
+        return f"Gebruik maximaal {MAX_LENGTH} tekens."
+    remainder = password.lower()
+    for word in WEAK:
+        remainder = remainder.replace(word, "")
+    if len(set(password)) < 4 or len(remainder) < 6 or remainder.isdigit():
+        return "Dit wachtwoord is te eenvoudig. Kies een uniek wachtwoord."
+    return None
+
+
+class CredentialStore:
+    def __init__(self, admin_file: Path, setup_code_file: Path):
+        self.admin_file = admin_file
+        self.setup_code_file = setup_code_file
+        self._lock = threading.Lock()
+
+    def _load(self) -> dict[str, Any] | None:
+        try:
+            data = json.loads(self.admin_file.read_text(encoding="utf-8"))
+        except (OSError, ValueError):
+            return None
+        if not isinstance(data, dict) or not str(data.get("password_hash", "")).startswith("$argon2id$"):
+            return None
+        return data
+
+    def is_configured(self) -> bool:
+        return self._load() is not None
+
+    def ensure_setup_code(self) -> str | None:
+        """Create a setup code while no password exists; remove it afterwards."""
+        if self.is_configured():
+            self.setup_code_file.unlink(missing_ok=True)
+            return None
+        code = setupcode.read(self.setup_code_file)
+        if not code:
+            code = setupcode.generate()
+            setupcode.write(self.setup_code_file, code)
+        return code
+
+    def check_setup_code(self, candidate: str) -> bool:
+        return setupcode.matches(self.setup_code_file, candidate)
+
+    def set_password(self, password: str) -> str:
+        """Store a new password hash; returns the new session epoch (old sessions become invalid)."""
+        epoch = secrets.token_hex(16)
+        record = {
+            "password_hash": HASHER.hash(password),
+            "session_epoch": epoch,
+            "updated_at": int(time.time()),
+        }
+        with self._lock:
+            atomic_write_json(self.admin_file, record, mode=0o600)
+        self.setup_code_file.unlink(missing_ok=True)
+        return epoch
+
+    def verify(self, password: str) -> bool:
+        data = self._load()
+        if data is None or len(password) > MAX_LENGTH:
+            return False
+        try:
+            HASHER.verify(data["password_hash"], password)
+        except (VerifyMismatchError, VerificationError, InvalidHash):
+            return False
+        if HASHER.check_needs_rehash(data["password_hash"]):
+            data["password_hash"] = HASHER.hash(password)
+            with self._lock:
+                atomic_write_json(self.admin_file, data, mode=0o600)
+        return True
+
+    def session_epoch(self) -> str | None:
+        data = self._load()
+        return data.get("session_epoch") if data else None
+
+
+class LoginThrottle:
+    """Per-IP exponential lockout plus a global brake against distributed guessing."""
+
+    def __init__(self, free_attempts: int = 5, window: float = 900, max_lock: float = 900,
+                 global_limit: int = 30, global_window: float = 300, clock=time.monotonic):
+        self.free_attempts = free_attempts
+        self.window = window
+        self.max_lock = max_lock
+        self.global_limit = global_limit
+        self.global_window = global_window
+        self.clock = clock
+        self._lock = threading.Lock()
+        self._failures: dict[str, deque] = {}
+        self._locked_until: dict[str, float] = {}
+        self._global: deque = deque()
+
+    def _prune(self, now: float) -> None:
+        while self._global and now - self._global[0] > self.global_window:
+            self._global.popleft()
+        for ip in list(self._failures):
+            q = self._failures[ip]
+            while q and now - q[0] > self.window:
+                q.popleft()
+            if not q and self._locked_until.get(ip, 0) <= now:
+                self._failures.pop(ip, None)
+                self._locked_until.pop(ip, None)
+
+    def retry_after(self, ip: str) -> int:
+        with self._lock:
+            now = self.clock()
+            self._prune(now)
+            wait = self._locked_until.get(ip, 0) - now
+            if len(self._global) >= self.global_limit:
+                wait = max(wait, self.global_window - (now - self._global[0]))
+            return max(0, int(wait + 0.999))
+
+    def failure(self, ip: str) -> None:
+        with self._lock:
+            now = self.clock()
+            self._prune(now)
+            q = self._failures.setdefault(ip, deque())
+            q.append(now)
+            self._global.append(now)
+            excess = len(q) - self.free_attempts
+            if excess >= 0:
+                self._locked_until[ip] = now + min(self.max_lock, 30 * (2 ** excess))
+
+    def success(self, ip: str) -> None:
+        with self._lock:
+            self._failures.pop(ip, None)
+            self._locked_until.pop(ip, None)

src/daynivo_kiosk/web/security.py

@@ -0,0 +1,90 @@
+"""Request-level protections: client network filter, CSRF, security headers."""
+
+from __future__ import annotations
+
+import hmac
+import ipaddress
+import secrets
+from urllib.parse import urlsplit
+
+from flask import Request, session
+
+CSRF_FIELD = "csrf_token"
+CSRF_HEADER = "X-CSRF-Token"
+_VPN_RANGES = (ipaddress.ip_network("100.64.0.0/10"),)  # CGNAT, used by Tailscale and many VPNs
+
+CSP = "; ".join([
+    "default-src 'self'",
+    "img-src 'self' data: blob:",
+    "style-src 'self'",
+    "script-src 'self'",
+    "connect-src 'self'",
+    "frame-ancestors 'none'",
+    "form-action 'self'",
+    "base-uri 'none'",
+    "object-src 'none'",
+])
+
+
+def client_allowed(remote_addr: str | None, allow_public: bool, local_networks: list[str] = ()) -> bool:
+    """Only local networks may reach the admin interface unless explicitly opened up.
+
+    Local means: private/link-local/loopback ranges, CGNAT (VPN) or one of
+    the subnets this device itself is on (covers global IPv6 prefixes on
+    the LAN).
+    """
+    if allow_public:
+        return True
+    try:
+        addr = ipaddress.ip_address((remote_addr or "").split("%", 1)[0])
+    except ValueError:
+        return False
+    if isinstance(addr, ipaddress.IPv6Address) and addr.ipv4_mapped:
+        addr = addr.ipv4_mapped
+    if addr.is_multicast:
+        return False
+    if addr.is_loopback or addr.is_link_local or addr.is_private:
+        return True
+    if any(addr in net for net in _VPN_RANGES if addr.version == net.version):
+        return True
+    for cidr in local_networks:
+        try:
+            net = ipaddress.ip_interface(cidr).network
+        except ValueError:
+            continue
+        if net.version == addr.version and addr in net and net.prefixlen >= (16 if net.version == 4 else 48):
+            return True
+    return False
+
+
+def csrf_token() -> str:
+    token = session.get("csrf")
+    if not token:
+        token = secrets.token_urlsafe(32)
+        session["csrf"] = token
+    return token
+
+
+def csrf_valid(request: Request) -> bool:
+    expected = session.get("csrf")
+    supplied = request.headers.get(CSRF_HEADER) or request.form.get(CSRF_FIELD, "")
+    if not expected or not supplied or not hmac.compare_digest(expected, supplied):
+        return False
+    origin = request.headers.get("Origin")
+    if origin and origin != "null":
+        return urlsplit(origin).netloc == request.host
+    return True
+
+
+def apply_headers(response, secure: bool):
+    response.headers.setdefault("Content-Security-Policy", CSP)
+    response.headers["X-Content-Type-Options"] = "nosniff"
+    response.headers["X-Frame-Options"] = "DENY"
+    response.headers["Referrer-Policy"] = "no-referrer"
+    response.headers["Permissions-Policy"] = "camera=(), microphone=(), geolocation=()"
+    response.headers["Cross-Origin-Opener-Policy"] = "same-origin"
+    if response.mimetype in ("text/html", "application/json") or response.mimetype.startswith("image/"):
+        response.headers["Cache-Control"] = "no-store"
+    if secure:
+        response.headers["Strict-Transport-Security"] = "max-age=31536000"
+    return response

src/daynivo_kiosk/web/static/app.css

@@ -0,0 +1,170 @@
+:root {
+  --navy: #0b2545;
+  --navy-2: #13315c;
+  --accent: #0b2545;
+  --accent-dark: #13315c;
+  --bg: #f2f5f9;
+  --card: #ffffff;
+  --text: #1b2433;
+  --muted: #5c6b80;
+  --border: #dde3eb;
+  --ok: #1f9d55;
+  --warning: #d98a00;
+  --error: #d64545;
+  --stopped: #8592a3;
+  --starting: #2f80ed;
+  --radius: 8px;
+  --shadow: none;
+  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+  color: var(--text);
+  background: var(--bg);
+}
+
+* { box-sizing: border-box; }
+[hidden] { display: none !important; }
+body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; background: var(--bg); line-height: 1.5; }
+a { color: var(--accent); }
+code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92em; background: #eef2f7; padding: .05em .35em; border-radius: 4px; }
+h1 { font-size: 1.6rem; margin: 0 0 .25rem; }
+h2 { font-size: 1.1rem; margin: 0 0 .9rem; }
+.mt { margin-top: 1.6rem; }
+.mt-sm { margin-top: 1rem; }
+.muted { color: var(--muted); }
+.small { font-size: .875rem; }
+.break { overflow-wrap: anywhere; }
+.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
+
+/* --- top bar --------------------------------------------------------------- */
+.topbar { background: var(--navy); color: #fff; position: sticky; top: 0; z-index: 10; }
+.topbar-inner { max-width: 1200px; margin: 0 auto; padding: 0 1rem; display: flex; align-items: center; gap: 1rem; min-height: 56px; flex-wrap: wrap; }
+.brand { display: flex; align-items: center; gap: .6rem; color: #fff; text-decoration: none; font-size: 1.1rem; margin-right: auto; }
+/* The Daynivo mark has navy parts that would vanish on the navy bar. */
+.brand-mark { display: inline-flex; align-items: center; background: #fff; border-radius: 6px; padding: 3px 5px; }
+.brand-mark img { display: block; height: 22px; width: auto; }
+.mainnav { display: flex; align-items: center; gap: .25rem; flex-wrap: wrap; }
+.mainnav a, .mainnav button { color: #d6e2f3; text-decoration: none; padding: .45rem .7rem; border-radius: 6px; font: inherit; font-size: .95rem; background: none; border: 0; cursor: pointer; }
+.mainnav a:hover, .mainnav button:hover { background: var(--navy-2); color: #fff; }
+.mainnav a[aria-current="page"] { background: var(--navy-2); color: #fff; }
+.nav-logout { margin: 0; }
+.nav-menu { position: relative; }
+.nav-menu summary { list-style: none; color: #d6e2f3; padding: .45rem .7rem; border-radius: 6px; font-size: .95rem; cursor: pointer; user-select: none; }
+.nav-menu summary::-webkit-details-marker { display: none; }
+.nav-menu summary:hover, .nav-menu[open] summary { background: var(--navy-2); color: #fff; }
+.nav-menu-list { position: absolute; right: 0; top: calc(100% + 6px); min-width: 230px; padding: .3rem 0; background: #fff; border: 1px solid var(--border); border-radius: 6px; box-shadow: 0 8px 24px rgba(11, 37, 69, .15); z-index: 20; }
+.nav-menu-list form { margin: 0; }
+.mainnav .nav-menu-list button { display: block; width: 100%; text-align: left; padding: .55rem .9rem; border-radius: 0; color: var(--text); }
+.mainnav .nav-menu-list button:hover { background: #f1f4f8; color: var(--text); }
+.mainnav .nav-menu-list button.danger { color: #b03030; }
+.nav-menu-list hr { border: 0; border-top: 1px solid var(--border); margin: .3rem 0; }
+.nav-toggle { display: none; background: none; border: 1px solid rgba(255, 255, 255, .3); border-radius: 8px; width: 44px; height: 40px; cursor: pointer; }
+.nav-toggle .bars, .nav-toggle .bars::before, .nav-toggle .bars::after { display: block; width: 20px; height: 2px; background: #fff; margin: 0 auto; position: relative; content: ""; }
+.nav-toggle .bars::before { position: absolute; top: -6px; }
+.nav-toggle .bars::after { position: absolute; top: 6px; }
+
+@media (max-width: 860px) {
+  .nav-toggle { display: block; }
+  .mainnav { display: none; width: 100%; flex-direction: column; align-items: stretch; padding-bottom: .75rem; }
+  .mainnav.open { display: flex; }
+  .mainnav a, .mainnav button, .nav-menu summary { padding: .75rem; text-align: left; width: 100%; }
+  .nav-menu-list { position: static; min-width: 0; margin: .25rem 0 0 .75rem; background: none; border: 0; border-left: 1px solid rgba(255, 255, 255, .2); border-radius: 0; box-shadow: none; }
+  .mainnav .nav-menu-list button { color: #d6e2f3; }
+  .mainnav .nav-menu-list button:hover { background: var(--navy-2); color: #fff; }
+  .mainnav .nav-menu-list button.danger { color: #ffb4b4; }
+  .nav-menu-list hr { border-top-color: rgba(255, 255, 255, .2); }
+}
+
+/* --- layout ------------------------------------------------------------------ */
+.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 1.5rem 1rem 2rem; flex: 1; }
+.page-head { display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
+.page-head p { margin: 0; }
+.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); margin-bottom: 1rem; }
+.grid-2 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 460px), 1fr)); }
+.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow); margin-bottom: 1rem; min-width: 0; }
+.grid > .card { margin-bottom: 0; }
+.card-narrow { max-width: 460px; margin: 2rem auto; }
+.card-pending { border-color: var(--warning); background: #fff8eb; }
+.footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; padding: 1rem; color: var(--muted); font-size: .85rem; max-width: 1200px; width: 100%; margin: 0 auto; }
+
+/* --- key/value lists ---------------------------------------------------------- */
+.kv { display: grid; grid-template-columns: minmax(110px, 38%) 1fr; gap: .55rem 1rem; margin: 0; }
+.kv dt { color: var(--muted); }
+.kv dd { margin: 0; min-width: 0; }
+.kv-tight { margin-top: 1rem; font-size: .92rem; }
+.note { margin: 1rem 0 0; padding: .6rem .8rem; background: #f4f6f9; border-radius: 6px; font-size: .9rem; }
+
+/* --- status badges ------------------------------------------------------------- */
+.badge { display: inline-flex; align-items: center; gap: .45rem; padding: .1rem .55rem; border-radius: 4px; font-size: .875rem; font-weight: 500; background: #eef1f5; color: var(--text); }
+.badge .dot { width: .6rem; height: .6rem; border-radius: 50%; background: var(--stopped); flex: none; }
+.badge-ok .dot { background: var(--ok); }
+.badge-warning .dot { background: var(--warning); }
+.badge-error { color: #a32c2c; } .badge-error .dot { background: var(--error); }
+.badge-starting .dot { background: var(--starting); animation: pulse 1.2s infinite; }
+.badge-stopped, .badge-unknown { color: var(--muted); }
+@keyframes pulse { 50% { opacity: .35; } }
+
+.meter { height: 6px; border-radius: 3px; background: #e6ebf2; margin-top: .35rem; overflow: hidden; }
+.meter span { display: block; height: 100%; width: 0; background: #7d8ba0; transition: width .4s; }
+.meter span.is-mid { background: var(--warning); }
+.meter span.is-high { background: var(--error); }
+
+/* --- buttons ---------------------------------------------------------------------- */
+.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; font: inherit; font-size: .95rem; font-weight: 500; padding: .45rem .9rem; border-radius: 6px; border: 1px solid transparent; cursor: pointer; text-decoration: none; transition: background .15s; min-height: 38px; }
+.btn:disabled { opacity: .6; cursor: progress; }
+.btn-primary { background: var(--accent); color: #fff; } .btn-primary:hover { background: var(--accent-dark); }
+.btn-secondary { background: #fff; color: var(--text); border-color: #c5cfdb; } .btn-secondary:hover { background: #f1f4f8; }
+.btn-danger { background: #fff; color: #b03030; border-color: #e3b5b5; } .btn-danger:hover { background: #fcf1f1; }
+.btn-big { padding: .55rem 1.1rem; min-height: 42px; }
+.btn-block { width: 100%; }
+.actions-row { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
+.inline-form { margin: 0; }
+@media (max-width: 560px) {
+  .actions-row .inline-form, .actions-row .btn-big { width: 100%; }
+}
+
+/* --- forms -------------------------------------------------------------------------- */
+.form { display: flex; flex-direction: column; gap: .9rem; }
+.form label { display: flex; flex-direction: column; gap: .3rem; font-weight: 600; font-size: .95rem; }
+.form small { font-weight: 400; color: var(--muted); }
+.form input[type=text], .form input[type=url], .form input[type=password], .form input[type=number], .form select {
+  font: inherit; font-weight: 400; padding: .6rem .7rem; border: 1px solid #c5cfdb; border-radius: 8px; background: #fff; color: var(--text); width: 100%; min-height: 44px;
+}
+.form input:focus, .form select:focus { outline: 2px solid #9fb3cc; outline-offset: 1px; border-color: var(--navy); }
+.form label.check { flex-direction: row; align-items: center; gap: .55rem; font-weight: 400; }
+.form label.check input { width: 1.15rem; height: 1.15rem; }
+.form .btn { align-self: flex-start; }
+.form .btn-block { align-self: stretch; }
+.form-inline { flex-direction: row; flex-wrap: wrap; align-items: flex-end; }
+.form-inline label { min-width: 150px; }
+.input-short { max-width: 6rem; text-transform: uppercase; }
+.input-code { text-transform: uppercase; letter-spacing: .15em; font-family: ui-monospace, Menlo, monospace !important; }
+.input-row { display: flex; gap: .5rem; }
+.input-row input { flex: 1; }
+.radio-row { border: 0; padding: 0; margin: 0; display: flex; gap: 1.5rem; flex-wrap: wrap; }
+.radio-row legend { font-weight: 600; font-size: .95rem; margin-bottom: .3rem; padding: 0; }
+.static-fields { display: flex; flex-direction: column; gap: .9rem; }
+.static-fields[hidden] { display: none; }
+.scan-results { list-style: none; margin: 0; padding: 0; border: 1px solid var(--border); border-radius: 8px; max-height: 240px; overflow: auto; }
+.scan-results li button { width: 100%; display: flex; justify-content: space-between; gap: 1rem; padding: .55rem .75rem; background: none; border: 0; border-bottom: 1px solid var(--border); font: inherit; cursor: pointer; text-align: left; }
+.scan-results li button:hover { background: #f1f4f8; }
+.plain { margin: 0; padding-left: 1.2rem; }
+.plain li { margin-bottom: .4rem; }
+
+/* --- alerts --------------------------------------------------------------------------- */
+.alert { padding: .7rem .9rem; border-radius: 6px; margin-bottom: 1rem; border: 1px solid; }
+.alert-success { background: #e3f5ea; border-color: #b6e2c6; color: #145c33; }
+.alert-error { background: #fde6e6; border-color: #f4bcbc; color: #8f2424; }
+.alert-warning { background: #fff1d6; border-color: #f3d39b; color: #7a4e00; }
+.alert-info { background: #e3eefc; border-color: #bcd4f7; color: #1d4f9c; }
+
+/* --- logs & screenshot ----------------------------------------------------------------- */
+.log { background: #0f1b2d; color: #d7e3f4; padding: 1rem; border-radius: 10px; font-size: .8rem; line-height: 1.45; overflow: auto; max-height: 65vh; white-space: pre-wrap; word-break: break-word; margin: 1rem 0 0; }
+.log-short { max-height: 280px; margin-top: 0; }
+.screenshot { background: #0f1b2d; border-radius: 10px; min-height: 160px; display: flex; align-items: center; justify-content: center; margin-bottom: .8rem; overflow: hidden; }
+.screenshot p { color: #b9c7da; padding: 1rem; text-align: center; margin: 0; }
+.screenshot img { width: 100%; height: auto; display: block; }
+
+/* --- dialog ------------------------------------------------------------------------------ */
+.dialog { border: 0; border-radius: var(--radius); padding: 1.5rem; max-width: min(440px, calc(100vw - 2rem)); box-shadow: 0 20px 60px rgba(0, 0, 0, .3); }
+.dialog::backdrop { background: rgba(11, 37, 69, .55); }
+.dialog form { margin: 0; }
+.dialog-actions { display: flex; justify-content: flex-end; gap: .6rem; margin-top: 1.25rem; flex-wrap: wrap; }

src/daynivo_kiosk/web/static/app.js

@@ -0,0 +1,217 @@
+/* Daynivo Kiosk Manager — progressive enhancements. Every page works without JS. */
+(function () {
+  "use strict";
+
+  const csrf = () => document.querySelector('meta[name="csrf-token"]').content;
+  const $ = (sel, root = document) => root.querySelector(sel);
+  const $$ = (sel, root = document) => Array.from(root.querySelectorAll(sel));
+
+  // Mobile navigation
+  const toggle = $("[data-nav-toggle]");
+  if (toggle) {
+    toggle.addEventListener("click", () => {
+      const nav = $("#mainnav");
+      const open = nav.classList.toggle("open");
+      toggle.setAttribute("aria-expanded", String(open));
+    });
+  }
+
+  // Actions menu: close after choosing an item, on a click outside it or on Escape
+  const menu = $("[data-nav-menu]");
+  if (menu) {
+    document.addEventListener("click", (event) => {
+      if (menu.open && (!menu.contains(event.target) || event.target.closest(".nav-menu-list button"))) menu.open = false;
+    });
+    document.addEventListener("keydown", (event) => {
+      if (event.key === "Escape" && menu.open) menu.open = false;
+    });
+  }
+
+  // Confirmation dialog for dangerous actions (forms with data-confirm)
+  const dialog = $("#confirm-dialog");
+  $$("form[data-confirm]").forEach((form) => {
+    form.addEventListener("submit", (event) => {
+      if (form.dataset.confirmed === "1" || !dialog || typeof dialog.showModal !== "function") return;
+      event.preventDefault();
+      $("[data-confirm-title]", dialog).textContent = form.dataset.confirmTitle || "Weet je het zeker?";
+      $("[data-confirm-text]", dialog).textContent = form.dataset.confirm;
+      dialog.returnValue = "";
+      dialog.showModal();
+      dialog.addEventListener("close", function onClose() {
+        dialog.removeEventListener("close", onClose);
+        if (dialog.returnValue === "ok") {
+          form.dataset.confirmed = "1";
+          form.requestSubmit ? form.requestSubmit() : form.submit();
+        }
+      });
+    });
+  });
+
+  // Disable buttons while a form submits, to prevent double actions
+  $$("form").forEach((form) => {
+    form.addEventListener("submit", (event) => {
+      if (event.defaultPrevented || form.method.toLowerCase() !== "post") return;
+      setTimeout(() => $$("button[type=submit], button:not([type])", form).forEach((b) => (b.disabled = true)), 0);
+    });
+  });
+
+  // Meters (width set here because the CSP forbids inline styles)
+  function setMeter(el, pct) {
+    const value = Math.max(0, Math.min(100, Number(pct) || 0));
+    el.style.width = value + "%";
+    el.classList.toggle("is-high", value >= 90);
+    el.classList.toggle("is-mid", value >= 75 && value < 90);
+  }
+  $$("[data-meter]").forEach((el) => setMeter(el, el.dataset.pct));
+
+  // Local time for epoch timestamps
+  $$("time[data-epoch]").forEach((el) => {
+    const d = new Date(Number(el.dataset.epoch) * 1000);
+    el.dateTime = d.toISOString();
+    el.textContent = d.toLocaleString("nl-NL", { dateStyle: "short", timeStyle: "medium" });
+  });
+
+  // Live dashboard
+  const live = $("[data-live-status]");
+  if (live) {
+    const get = (obj, path) => path.split(".").reduce((o, k) => (o == null ? o : o[k]), obj);
+    const refresh = async () => {
+      try {
+        const res = await fetch(live.dataset.liveStatus, { headers: { Accept: "application/json" }, cache: "no-store" });
+        if (res.status === 401) return location.reload();
+        if (!res.ok) return;
+        const data = await res.json();
+        $$("[data-field]").forEach((el) => {
+          const value = get(data, el.dataset.field);
+          if (value !== undefined && value !== null) el.textContent = value;
+        });
+        $$("[data-meter]").forEach((el) => setMeter(el, data[el.dataset.meter]));
+        $$("[data-badge]").forEach((el) => {
+          const key = el.dataset.badge;
+          let status, label;
+          if (key === "temperature") { status = data.temperature_status; label = data.temperature; }
+          else if (data[key]) { status = data[key].status; label = data[key].label; }
+          if (!status) return;
+          el.className = "badge badge-" + status;
+          $("[data-badge-label]", el).textContent = label;
+        });
+      } catch (e) { /* device rebooting or offline: try again next round */ }
+    };
+    setInterval(refresh, 5000);
+  }
+
+  // Screenshot
+  const shotBtn = $("[data-screenshot-btn]");
+  if (shotBtn) {
+    const box = $("[data-screenshot]");
+    const img = $("img", box);
+    const msg = $("[data-screenshot-msg]", box);
+    shotBtn.addEventListener("click", async () => {
+      shotBtn.disabled = true;
+      msg.textContent = "Screenshot maken…";
+      msg.hidden = false;
+      try {
+        const res = await fetch(box.dataset.screenshot + "?t=" + Date.now(), { cache: "no-store" });
+        if (!res.ok) throw new Error(await res.text());
+        const blob = await res.blob();
+        if (img.src) URL.revokeObjectURL(img.src);
+        img.src = URL.createObjectURL(blob);
+        img.hidden = false;
+        msg.hidden = true;
+      } catch (e) {
+        img.hidden = true;
+        msg.textContent = e.message || "Screenshot niet beschikbaar.";
+      } finally {
+        shotBtn.disabled = false;
+      }
+    });
+  }
+
+  // Static IP fields only when "Statisch" is selected
+  $$("form[data-ipform]").forEach((form) => {
+    const fields = $("[data-static-fields]", form);
+    const update = () => {
+      const method = $('input[name="method"]:checked', form);
+      fields.hidden = !method || method.value !== "static";
+    };
+    $$('input[name="method"]', form).forEach((r) => r.addEventListener("change", update));
+    update();
+  });
+
+  // "Scherm altijd aan" hides the timeout field
+  $$("[data-toggle-target]").forEach((box) => {
+    const target = $(box.dataset.toggleTarget);
+    const update = () => { if (target) target.hidden = box.checked; };
+    box.addEventListener("change", update);
+    update();
+  });
+
+  // Wifi scan
+  const scanBtn = $("[data-wifi-scan]");
+  if (scanBtn) {
+    const form = scanBtn.closest("form");
+    const list = $("[data-scan-results]", form);
+    const datalist = $("#wifi-networks");
+    scanBtn.addEventListener("click", async () => {
+      scanBtn.disabled = true;
+      scanBtn.textContent = "Scannen…";
+      list.hidden = false;
+      list.replaceChildren(Object.assign(document.createElement("li"), { textContent: "Netwerken zoeken…", className: "muted" }));
+      try {
+        const res = await fetch(scanBtn.dataset.wifiScan, { method: "POST", headers: { "X-CSRF-Token": csrf(), Accept: "application/json" } });
+        const data = await res.json();
+        if (!res.ok) throw new Error(data.error || "Scannen mislukt");
+        list.replaceChildren();
+        datalist.replaceChildren();
+        if (!data.networks.length) list.append(Object.assign(document.createElement("li"), { textContent: "Geen netwerken gevonden.", className: "muted" }));
+        data.networks.forEach((n) => {
+          const li = document.createElement("li");
+          const b = document.createElement("button");
+          b.type = "button";
+          const name = document.createElement("span");
+          name.textContent = n.ssid + (n.in_use ? " (verbonden)" : "");
+          const meta = document.createElement("span");
+          meta.className = "muted";
+          meta.textContent = n.signal + "% · " + (n.security === "open" ? "open" : n.security);
+          b.append(name, meta);
+          b.addEventListener("click", () => {
+            $('input[name="ssid"]', form).value = n.ssid;
+            $('input[name="open"]', form).checked = n.security === "open";
+            list.hidden = true;
+            $('input[name="psk"]', form).focus();
+          });
+          li.append(b);
+          list.append(li);
+          datalist.append(Object.assign(document.createElement("option"), { value: n.ssid }));
+        });
+      } catch (e) {
+        list.replaceChildren(Object.assign(document.createElement("li"), { textContent: e.message, className: "muted" }));
+      } finally {
+        scanBtn.disabled = false;
+        scanBtn.textContent = "Scannen";
+      }
+    });
+  }
+
+  // Pending network change countdown
+  const pending = $("[data-pending]");
+  if (pending) {
+    let remaining = Number(pending.dataset.remaining) || 0;
+    const counter = $("[data-countdown]", pending);
+    const tick = setInterval(() => {
+      remaining = Math.max(0, remaining - 1);
+      counter.textContent = remaining;
+      if (remaining === 0) {
+        clearInterval(tick);
+        setTimeout(() => location.reload(), 5000);
+      }
+    }, 1000);
+  }
+
+  // Redirect after the admin interface moved
+  const moved = $("[data-redirect]");
+  if (moved) setTimeout(() => (location.href = moved.dataset.redirect), Number(moved.dataset.redirectAfter) * 1000);
+
+  // Scroll log views to the newest line
+  $$("[data-scroll-bottom]").forEach((el) => (el.scrollTop = el.scrollHeight));
+})();

src/daynivo_kiosk/web/templates/_ipv4_fields.html

@@ -0,0 +1,17 @@
+<fieldset class="radio-row">
+  <legend>IPv4-adres</legend>
+  <label class="check"><input type="radio" name="method" value="dhcp" {% if p.method != 'static' %}checked{% endif %}> Automatisch (DHCP)</label>
+  <label class="check"><input type="radio" name="method" value="static" {% if p.method == 'static' %}checked{% endif %}> Statisch</label>
+</fieldset>
+<div class="static-fields" data-static-fields>
+  <label>IP-adres met prefix
+    <input type="text" name="address" value="{{ p.address }}" placeholder="192.168.1.50/24" autocomplete="off" spellcheck="false">
+  </label>
+  <label>Gateway
+    <input type="text" name="gateway" value="{{ p.gateway }}" placeholder="192.168.1.1" autocomplete="off" spellcheck="false">
+  </label>
+</div>
+<label>DNS-servers
+  <input type="text" name="dns" value="{{ p.dns }}" placeholder="Leeg = via DHCP, bijv. 1.1.1.1, 9.9.9.9" autocomplete="off" spellcheck="false">
+  <small>Maximaal drie, gescheiden door komma's. Verplicht bij een statisch adres.</small>
+</label>

src/daynivo_kiosk/web/templates/_macros.html

@@ -0,0 +1,19 @@
+{% macro badge(status, label, field=None) -%}
+<span class="badge badge-{{ status }}" {% if field %}data-badge="{{ field }}"{% endif %}><span class="dot" aria-hidden="true"></span><span data-badge-label>{{ label }}</span></span>
+{%- endmacro %}
+
+{% macro menu_action(url, label, confirm=None, confirm_title=None, danger=False) -%}
+<form method="post" action="{{ url }}" {% if confirm %}data-confirm="{{ confirm }}" data-confirm-title="{{ confirm_title or label }}"{% endif %}>
+  <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+  <button type="submit"{% if danger %} class="danger"{% endif %}>{{ label }}</button>
+</form>
+{%- endmacro %}
+
+{% macro csrf() -%}
+<input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+{%- endmacro %}
+
+{# Width is applied by app.js: the CSP does not allow inline style attributes. #}
+{% macro meter(percent, field) -%}
+<div class="meter" role="presentation"><span data-meter="{{ field }}" data-pct="{{ percent }}"></span></div>
+{%- endmacro %}

src/daynivo_kiosk/web/templates/base.html

@@ -0,0 +1,75 @@
+{% from "_macros.html" import menu_action with context %}
+<!doctype html>
+<html lang="nl">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta name="csrf-token" content="{{ csrf_token() }}">
+  <title>{% block title %}{{ title or "Beheer" }}{% endblock %} · Daynivo Kiosk Manager</title>
+  <link rel="icon" href="{{ url_for('static', filename='favicon.png') }}" type="image/png">
+  <link rel="stylesheet" href="{{ url_for('static', filename='app.css') }}?v={{ version }}">
+  <script src="{{ url_for('static', filename='app.js') }}?v={{ version }}" defer></script>
+</head>
+<body>
+  <header class="topbar">
+    <div class="topbar-inner">
+      <a class="brand" href="{{ url_for('ui.dashboard') }}">
+        <span class="brand-mark"><img src="{{ url_for('static', filename='logo-mark.png') }}" alt="" width="34" height="22"></span>
+        <span><strong>Daynivo</strong> Kiosk Manager</span>
+      </a>
+      {% if logged_in %}
+      <button class="nav-toggle" type="button" aria-controls="mainnav" aria-expanded="false" data-nav-toggle>
+        <span class="sr-only">Menu</span><span class="bars" aria-hidden="true"></span>
+      </button>
+      <nav id="mainnav" class="mainnav">
+        <a href="{{ url_for('ui.dashboard') }}" {% if active == 'dashboard' %}aria-current="page"{% endif %}>Dashboard</a>
+        <a href="{{ url_for('ui.kiosk') }}" {% if active == 'kiosk' %}aria-current="page"{% endif %}>Kiosk</a>
+        <a href="{{ url_for('ui.system') }}" {% if active == 'system' %}aria-current="page"{% endif %}>Systeem</a>
+        <a href="{{ url_for('ui.network') }}" {% if active == 'network' %}aria-current="page"{% endif %}>Netwerk</a>
+        <a href="{{ url_for('ui.logs') }}" {% if active == 'logs' %}aria-current="page"{% endif %}>Logboek</a>
+        <a href="{{ url_for('ui.change_password') }}" {% if active == 'account' %}aria-current="page"{% endif %}>Wachtwoord</a>
+        <details class="nav-menu" data-nav-menu>
+          <summary>Acties <span aria-hidden="true">▾</span></summary>
+          <div class="nav-menu-list">
+            {{ menu_action(url_for('ui.kiosk_reload'), "Pagina herladen") }}
+            {{ menu_action(url_for('ui.kiosk_restart'), "Chromium herstarten", confirm="Chromium wordt afgesloten en opnieuw gestart. Het scherm is enkele seconden zwart.") }}
+            <hr>
+            {{ menu_action(url_for('ui.system_reboot'), "Raspberry Pi herstarten", confirm="De Raspberry Pi herstart. Het scherm en de beheerinterface zijn ongeveer een minuut niet beschikbaar.", danger=True) }}
+            {{ menu_action(url_for('ui.system_poweroff'), "Veilig uitschakelen", confirm="De Raspberry Pi wordt uitgeschakeld. Daarna kan hij alleen weer aan door de stroom los en weer vast te maken.", confirm_title="Raspberry Pi uitschakelen", danger=True) }}
+          </div>
+        </details>
+        <form method="post" action="{{ url_for('ui.logout') }}" class="nav-logout">
+          <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+          <button type="submit">Uitloggen</button>
+        </form>
+      </nav>
+      {% endif %}
+    </div>
+  </header>
+
+  <main class="container">
+    {% with messages = get_flashed_messages(with_categories=true) %}
+      {% for category, message in messages %}
+        <div class="alert alert-{{ category }}" role="status">{{ message }}</div>
+      {% endfor %}
+    {% endwith %}
+    {% block content %}{% endblock %}
+  </main>
+
+  <footer class="footer">
+    <span>{{ device_name }} · {{ hostname }}</span>
+    <span>Daynivo Kiosk OS {{ version }}</span>
+  </footer>
+
+  <dialog id="confirm-dialog" class="dialog">
+    <form method="dialog">
+      <h2 data-confirm-title>Weet je het zeker?</h2>
+      <p data-confirm-text></p>
+      <div class="dialog-actions">
+        <button value="cancel" class="btn btn-secondary">Annuleren</button>
+        <button value="ok" class="btn btn-danger" data-confirm-ok>Doorgaan</button>
+      </div>
+    </form>
+  </dialog>
+</body>
+</html>

src/daynivo_kiosk/web/templates/dashboard.html

@@ -0,0 +1,62 @@
+{% extends "base.html" %}
+{% from "_macros.html" import badge, meter with context %}
+{% set title = "Dashboard" %}
+{% block content %}
+<div class="page-head">
+  <h1>Dashboard</h1>
+  <p class="muted">Ververst automatisch elke 5 seconden.</p>
+</div>
+
+
+<div class="grid" data-live-status="{{ url_for('ui.api_status') }}">
+  <section class="card">
+    <h2>Kiosk</h2>
+    <dl class="kv">
+      <dt>Chromium</dt><dd>{{ badge(s.browser.status, s.browser.label, "browser") }}</dd>
+      <dt>Kiosk-URL</dt><dd class="break" data-field="url">{{ s.url }}</dd>
+      <dt>Verbinding</dt><dd>{{ badge(s.network.status, s.network.label, "network") }}</dd>
+      <dt>Herstarts</dt><dd data-field="browser.restarts">{{ s.browser.restarts }}</dd>
+    </dl>
+    {% if s.last_error %}
+    <p class="note">Laatste melding: <span data-field="last_error.message">{{ s.last_error.message }}</span></p>
+    {% endif %}
+  </section>
+
+  <section class="card">
+    <h2>Systeem</h2>
+    <dl class="kv">
+      <dt>Uptime</dt><dd data-field="uptime">{{ s.uptime }}</dd>
+      <dt>CPU-belasting</dt><dd><span data-field="cpu">{{ s.cpu }}</span> <span class="muted">(load <span data-field="load">{{ s.load }}</span>)</span></dd>
+      <dt>Temperatuur</dt><dd>{{ badge(s.temperature_status, s.temperature, "temperature") }}</dd>
+      {% if s.power %}<dt>Voeding</dt><dd>{{ badge(s.power.status, s.power.label, "power") }}</dd>{% endif %}
+    </dl>
+  </section>
+
+  <section class="card">
+    <h2>Geheugen &amp; opslag</h2>
+    <dl class="kv">
+      <dt>RAM</dt><dd><span data-field="memory">{{ s.memory }}</span>{{ meter(s.memory_percent, "memory_percent") }}</dd>
+      <dt>SD-kaart</dt><dd><span data-field="disk">{{ s.disk }}</span>{{ meter(s.disk_percent, "disk_percent") }}</dd>
+    </dl>
+  </section>
+
+  <section class="card">
+    <h2>Netwerk</h2>
+    <dl class="kv">
+      <dt>Ethernet</dt><dd data-field="eth0">{{ s.eth0 }}</dd>
+      <dt>Wifi</dt><dd data-field="wlan0">{{ s.wlan0 }}</dd>
+      <dt>Hostname</dt><dd>{{ hostname }}.local</dd>
+    </dl>
+  </section>
+
+  <section class="card">
+    <h2>Over dit apparaat</h2>
+    <dl class="kv">
+      <dt>Naam</dt><dd>{{ device_name }}</dd>
+      <dt>Versie</dt><dd>Daynivo Kiosk OS {{ s.version }}</dd>
+      <dt>Besturingssysteem</dt><dd>{{ s.os }}</dd>
+      <dt>Hardware</dt><dd>{{ s.model }}</dd>
+    </dl>
+  </section>
+</div>
+{% endblock %}

src/daynivo_kiosk/web/templates/error.html

@@ -0,0 +1,7 @@
+{% extends "base.html" %}
+{% block content %}
+<section class="card card-narrow">
+  <h1>{{ title }}</h1>
+  <p>{{ message }}</p>
+</section>
+{% endblock %}

src/daynivo_kiosk/web/templates/kiosk.html

@@ -0,0 +1,69 @@
+{% extends "base.html" %}
+{% from "_macros.html" import badge, csrf with context %}
+{% set title = "Kiosk" %}
+{% block content %}
+<div class="page-head">
+  <h1>Kioskbeheer</h1>
+  {{ badge(s.browser.status, s.browser.label) }}
+</div>
+
+
+<div class="grid grid-2">
+  <section class="card">
+    <h2>Instellingen</h2>
+    <form method="post" action="{{ url_for('ui.kiosk_settings') }}" class="form">
+      {{ csrf() }}
+      <label>Kiosk-URL
+        <input type="url" name="url" value="{{ conf.url }}" required pattern="https://.+" maxlength="2048" autocomplete="off" spellcheck="false">
+        <small>Alleen HTTPS. Een toegangstoken in de URL (zoals <code>?token=</code> van Daynivo) wordt elders afgeschermd getoond.</small>
+      </label>
+      <label>Apparaatnaam
+        <input type="text" name="device_name" value="{{ conf.device_name }}" required maxlength="64">
+      </label>
+      <label>Automatisch verversen
+        <select name="refresh_interval">
+          {% set intervals = [(0, "Uit"), (60, "Elke minuut"), (300, "Elke 5 minuten"), (900, "Elk kwartier"), (1800, "Elk half uur"), (3600, "Elk uur"), (21600, "Elke 6 uur"), (86400, "Elke dag")] %}
+          {% set known = intervals|map(attribute=0)|list %}
+          {% for value, label in intervals %}<option value="{{ value }}" {% if conf.refresh_interval == value %}selected{% endif %}>{{ label }}</option>{% endfor %}
+          {% if conf.refresh_interval not in known %}<option value="{{ conf.refresh_interval }}" selected>Elke {{ conf.refresh_interval }} seconden</option>{% endif %}
+        </select>
+        <small>Wordt overgeslagen zolang de URL niet bereikbaar is, zodat een offline werkende pagina blijft staan.</small>
+      </label>
+      <label>Browserprofiel
+        <select name="browser_profile">
+          <option value="persistent" {% if conf.browser_profile == 'persistent' %}selected{% endif %}>Bewaren (cookies en offline-cache blijven na herstart)</option>
+          <option value="ephemeral" {% if conf.browser_profile == 'ephemeral' %}selected{% endif %}>Alleen in werkgeheugen (schoon bij iedere start)</option>
+        </select>
+      </label>
+      <label class="check"><input type="checkbox" name="browser_restart" value="1" {% if conf.browser_restart %}checked{% endif %}> Chromium automatisch herstarten na een crash</label>
+      <button type="submit" class="btn btn-primary">Opslaan</button>
+    </form>
+  </section>
+
+  <section class="card">
+    <h2>Huidig scherm</h2>
+    <div class="screenshot" data-screenshot="{{ url_for('ui.kiosk_screenshot') }}">
+      <p class="muted" data-screenshot-msg>Klik op ‘Screenshot maken’ om te zien wat de kiosk nu toont.</p>
+      <img alt="Screenshot van het kioskscherm" hidden>
+    </div>
+    <button type="button" class="btn btn-secondary" data-screenshot-btn>Screenshot maken</button>
+    <dl class="kv kv-tight">
+      <dt>Ingestelde URL</dt><dd class="break">{{ masked_url }}</dd>
+      <dt>Getoonde pagina</dt><dd class="break">{{ agent.page_url or "–" }}</dd>
+      <dt>Laatste controle</dt><dd>{% if agent.checked_at %}<time data-epoch="{{ agent.checked_at }}"></time> — {% if agent.target_reachable %}bereikbaar{% else %}{{ agent.reason or "niet bereikbaar" }}{% endif %}{% else %}–{% endif %}</dd>
+      {% if agent.offline_since %}<dt>Offline sinds</dt><dd><time data-epoch="{{ agent.offline_since }}"></time></dd>{% endif %}
+    </dl>
+  </section>
+</div>
+
+<section class="card">
+  <h2>Laatste meldingen</h2>
+  {% if errors %}
+  <pre class="log log-short">{% for line in errors %}{{ line }}
+{% endfor %}</pre>
+  {% else %}
+  <p class="muted">Geen waarschuwingen of fouten.</p>
+  {% endif %}
+  <p><a href="{{ url_for('ui.logs', source='kiosk') }}">Alle kiosklogs bekijken →</a></p>
+</section>
+{% endblock %}

src/daynivo_kiosk/web/templates/login.html

@@ -0,0 +1,17 @@
+{% extends "base.html" %}
+{% set title = "Inloggen" %}
+{% block content %}
+<section class="card card-narrow">
+  <h1>Inloggen</h1>
+  <p class="muted">{{ device_name }} · {{ hostname }}</p>
+  {% if error %}<div class="alert alert-error" role="alert">{{ error }}</div>{% endif %}
+  <form method="post" class="form">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+    <label>Beheerderswachtwoord
+      <input type="password" name="password" required autofocus autocomplete="current-password" maxlength="128">
+    </label>
+    <button type="submit" class="btn btn-primary btn-block">Inloggen</button>
+  </form>
+  <p class="muted small">Wachtwoord vergeten? Log via SSH in en voer <code>sudo daynivo-kiosk-ctl reset-password</code> uit.</p>
+</section>
+{% endblock %}

src/daynivo_kiosk/web/templates/logs.html

@@ -0,0 +1,28 @@
+{% extends "base.html" %}
+{% set title = "Logboek" %}
+{% block content %}
+<div class="page-head"><h1>Logboek</h1></div>
+<section class="card">
+  <form method="get" class="form form-inline">
+    <label>Bron
+      <select name="source">
+        {% for key, item in sources.items() %}<option value="{{ key }}" {% if key == source %}selected{% endif %}>{{ item[0] }}</option>{% endfor %}
+      </select>
+    </label>
+    <label>Regels
+      <select name="lines">
+        {% for n in line_options %}<option value="{{ n }}" {% if n == lines %}selected{% endif %}>{{ n }}</option>{% endfor %}
+      </select>
+    </label>
+    <label>Niveau
+      <select name="priority">
+        <option value="" {% if not priority %}selected{% endif %}>Alles</option>
+        <option value="warning" {% if priority == 'warning' %}selected{% endif %}>Waarschuwingen en fouten</option>
+        <option value="err" {% if priority == 'err' %}selected{% endif %}>Alleen fouten</option>
+      </select>
+    </label>
+    <button type="submit" class="btn btn-primary">Tonen</button>
+  </form>
+  <pre class="log" data-scroll-bottom>{{ text }}</pre>
+</section>
+{% endblock %}

src/daynivo_kiosk/web/templates/moved.html

@@ -0,0 +1,11 @@
+{% extends "base.html" %}
+{% set title = "Beheerinterface herstart" %}
+{% block content %}
+<section class="card card-narrow" data-redirect="{{ target }}" data-redirect-after="8">
+  <h1>Beheerinterface herstart</h1>
+  <p>De beheerinterface is straks bereikbaar op:</p>
+  <p><a href="{{ target }}"><code>{{ target }}</code></a></p>
+  <p class="muted">Je wordt over enkele seconden automatisch doorgestuurd. Bij HTTPS met een zelfondertekend
+     certificaat vraagt je browser eenmalig om bevestiging.</p>
+</section>
+{% endblock %}

src/daynivo_kiosk/web/templates/network.html

@@ -0,0 +1,100 @@
+{% extends "base.html" %}
+{% from "_macros.html" import badge, csrf with context %}
+{% set title = "Netwerk" %}
+{% block content %}
+<div class="page-head"><h1>Netwerkbeheer</h1></div>
+
+{% if pending %}
+<section class="card card-pending" data-pending="{{ url_for('ui.api_network_pending') }}" data-remaining="{{ pending.remaining }}">
+  <h2>Netwerkwijziging bevestigen</h2>
+  <p>De nieuwe instellingen voor <strong>{{ 'ethernet' if pending.interface == 'eth0' else 'wifi' }}</strong>
+    {% if pending.method == 'static' %}(statisch adres <strong>{{ pending.address }}</strong>){% else %}(DHCP){% endif %} zijn actief.
+    Werkt de beheerinterface nog? Bevestig dan. Zonder bevestiging worden over
+    <strong data-countdown>{{ pending.remaining }}</strong> seconden automatisch de vorige instellingen teruggezet.</p>
+  {% if pending.method == 'static' %}
+  <p class="muted">Is het adres veranderd? Open dan <code>{{ admin_scheme }}://{{ pending.address.split('/')[0] }}:{{ admin_port }}/network</code>, log in en bevestig daar.</p>
+  {% endif %}
+  <div class="actions-row">
+    <form method="post" action="{{ url_for('ui.network_confirm') }}" class="inline-form">{{ csrf() }}<button class="btn btn-primary btn-big">Bevestigen</button></form>
+    <form method="post" action="{{ url_for('ui.network_rollback') }}" class="inline-form">{{ csrf() }}<button class="btn btn-secondary btn-big">Nu terugdraaien</button></form>
+  </div>
+</section>
+{% endif %}
+
+{% if not net.available %}
+<div class="alert alert-error">NetworkManager (nmcli) is niet beschikbaar op dit systeem.</div>
+{% endif %}
+
+<div class="grid grid-2">
+  {% for iface in ['eth0', 'wlan0'] %}
+  {% set d = net.devices[iface] %}
+  <section class="card">
+    <h2>{{ 'Ethernet' if iface == 'eth0' else 'Wifi' }} <span class="muted small">({{ iface }})</span></h2>
+    <dl class="kv">
+      <dt>Status</dt><dd>{{ badge('ok' if d.connected else ('starting' if d.state == 'connecting' else 'stopped'), d.state_label) }}</dd>
+      {% if d.connection %}<dt>Verbinding</dt><dd>{{ d.connection }}</dd>{% endif %}
+      <dt>IP-adres</dt><dd>{{ d.addresses|join(', ') or '–' }}</dd>
+      <dt>Gateway</dt><dd>{{ d.gateway or '–' }}</dd>
+      <dt>DNS</dt><dd>{{ d.dns|join(', ') or '–' }}</dd>
+      {% if d.hwaddr %}<dt>MAC</dt><dd><code>{{ d.hwaddr }}</code></dd>{% endif %}
+    </dl>
+  </section>
+  {% endfor %}
+</div>
+
+<div class="grid grid-2">
+  <section class="card">
+    <h2>Ethernet instellen</h2>
+    {% set p = net.devices.eth0.profile %}
+    <form method="post" action="{{ url_for('ui.network_apply') }}" class="form" data-ipform
+          data-confirm="De netwerkinstellingen worden gewijzigd. Bevestig daarna binnen {{ rollback_seconds // 60 }} minuten, anders worden ze teruggezet." data-confirm-title="Ethernet wijzigen">
+      {{ csrf() }}
+      <input type="hidden" name="interface" value="eth0">
+      {% include "_ipv4_fields.html" %}
+      <button type="submit" class="btn btn-primary">Toepassen</button>
+    </form>
+  </section>
+
+  <section class="card">
+    <h2>Wifi instellen</h2>
+    {% set p = net.devices.wlan0.profile %}
+    <form method="post" action="{{ url_for('ui.network_apply') }}" class="form" data-ipform
+          data-confirm="De wifi-instellingen worden gewijzigd. Bevestig daarna binnen {{ rollback_seconds // 60 }} minuten, anders worden ze teruggezet." data-confirm-title="Wifi wijzigen">
+      {{ csrf() }}
+      <input type="hidden" name="interface" value="wlan0">
+      <label>Netwerknaam (SSID)
+        <span class="input-row">
+          <input type="text" name="ssid" value="{{ p.ssid }}" required maxlength="32" list="wifi-networks" autocomplete="off" spellcheck="false">
+          <button type="button" class="btn btn-secondary" data-wifi-scan="{{ url_for('ui.network_scan') }}">Scannen</button>
+        </span>
+        <datalist id="wifi-networks"></datalist>
+      </label>
+      <ul class="scan-results" data-scan-results hidden></ul>
+      <label>Wachtwoord
+        <input type="password" name="psk" minlength="8" maxlength="64" autocomplete="new-password" {% if p.exists %}placeholder="Leeg laten om het huidige wachtwoord te behouden"{% endif %}>
+      </label>
+      <label class="check"><input type="checkbox" name="open" value="1"> Open netwerk (zonder wachtwoord)</label>
+      <label class="check"><input type="checkbox" name="hidden" value="1" {% if p.hidden %}checked{% endif %}> Verborgen netwerk</label>
+      {% include "_ipv4_fields.html" %}
+      <button type="submit" class="btn btn-primary">Toepassen</button>
+    </form>
+
+    <h2 class="mt">Wifi-land</h2>
+    <form method="post" action="{{ url_for('ui.network_country') }}" class="form form-inline">
+      {{ csrf() }}
+      <label>Landcode
+        <input type="text" name="country" value="{{ net.wifi_country or 'NL' }}" required maxlength="2" pattern="[A-Za-z]{2}" class="input-short">
+      </label>
+      <button type="submit" class="btn btn-secondary">Instellen</button>
+    </form>
+  </section>
+</div>
+
+<section class="card">
+  <h2>Herstel bij een onbereikbare kiosk</h2>
+  <ul class="plain">
+    <li>Iedere wijziging wordt na {{ rollback_seconds // 60 }} minuten automatisch teruggedraaid als je hem niet bevestigt, ook als de stroom tussendoor uitvalt.</li>
+    <li>Noodherstel: zet een leeg bestand <code>daynivo-network-reset</code> op de bootpartitie van de SD-kaart en start de Pi. Alle Daynivo-netwerkprofielen worden dan verwijderd (terug naar DHCP).</li>
+  </ul>
+</section>
+{% endblock %}

src/daynivo_kiosk/web/templates/password.html

@@ -0,0 +1,21 @@
+{% extends "base.html" %}
+{% set title = "Wachtwoord wijzigen" %}
+{% block content %}
+<section class="card card-narrow">
+  <h1>Wachtwoord wijzigen</h1>
+  <form method="post" class="form">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+    <label>Huidig wachtwoord
+      <input type="password" name="current_password" required autocomplete="current-password" maxlength="128">
+    </label>
+    <label>Nieuw wachtwoord
+      <input type="password" name="password" required minlength="10" maxlength="128" autocomplete="new-password">
+    </label>
+    <label>Herhaal nieuw wachtwoord
+      <input type="password" name="password_confirm" required minlength="10" maxlength="128" autocomplete="new-password">
+    </label>
+    <button type="submit" class="btn btn-primary btn-block">Wijzigen</button>
+  </form>
+  <p class="muted small">Na het wijzigen worden alle andere sessies uitgelogd.</p>
+</section>
+{% endblock %}

src/daynivo_kiosk/web/templates/setup.html

@@ -0,0 +1,24 @@
+{% extends "base.html" %}
+{% set title = "Eerste configuratie" %}
+{% block content %}
+<section class="card card-narrow">
+  <h1>Welkom bij Daynivo Kiosk Manager</h1>
+  <p>Stel eerst een uniek beheerderswachtwoord in. Je hebt daarvoor de <strong>setupcode</strong> nodig die op het
+     scherm van de kiosk staat (of via SSH: <code>sudo daynivo-kiosk-ctl setup-code</code>).</p>
+  {% if error %}<div class="alert alert-error" role="alert">{{ error }}</div>{% endif %}
+  <form method="post" class="form">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+    <label>Setupcode
+      <input type="text" name="setup_code" required autocomplete="off" autocapitalize="characters" spellcheck="false" placeholder="ABCD-EFGH" maxlength="12" class="input-code">
+    </label>
+    <label>Nieuw wachtwoord
+      <input type="password" name="password" required minlength="10" maxlength="128" autocomplete="new-password">
+      <small>Minimaal 10 tekens. Gebruik voor iedere kiosk een eigen wachtwoord.</small>
+    </label>
+    <label>Herhaal wachtwoord
+      <input type="password" name="password_confirm" required minlength="10" maxlength="128" autocomplete="new-password">
+    </label>
+    <button type="submit" class="btn btn-primary btn-block">Wachtwoord instellen</button>
+  </form>
+</section>
+{% endblock %}

src/daynivo_kiosk/web/templates/system.html

@@ -0,0 +1,109 @@
+{% extends "base.html" %}
+{% from "_macros.html" import csrf with context %}
+{% set title = "Systeem" %}
+{% block content %}
+<div class="page-head"><h1>Systeembeheer</h1></div>
+
+
+<div class="grid grid-2">
+  <section class="card">
+    <h2>Scherm</h2>
+    <form method="post" action="{{ url_for('ui.system_display') }}" class="form">
+      {{ csrf() }}
+      <label>Rotatie
+        <select name="rotation">
+          {% for deg, label in [(0, "0° (normaal)"), (90, "90° (rechtsom)"), (180, "180° (ondersteboven)"), (270, "270° (linksom)")] %}
+          <option value="{{ deg }}" {% if conf.rotation == deg %}selected{% endif %}>{{ label }}</option>
+          {% endfor %}
+        </select>
+      </label>
+      <label>Resolutie
+        <select name="resolution">
+          <option value="auto" {% if conf.resolution == 'auto' %}selected{% endif %}>Automatisch (voorkeur van het scherm)</option>
+          {% for mode in modes %}<option value="{{ mode }}" {% if conf.resolution == mode %}selected{% endif %}>{{ mode }}</option>{% endfor %}
+          {% if conf.resolution != 'auto' and conf.resolution not in modes %}<option value="{{ conf.resolution }}" selected>{{ conf.resolution }}</option>{% endif %}
+        </select>
+        <small>{% if output %}Aangesloten: {{ output.name }}{% if output.current %}, nu {{ output.current }}{% endif %}.{% else %}Schermgegevens verschijnen zodra de kiosk draait.{% endif %}</small>
+      </label>
+      <label>Zoomfactor
+        <input type="number" name="zoom" min="0.25" max="4" step="0.05" value="{{ conf.zoom }}">
+        <small>1 = normaal. Groter maakt alles groter (handig op grote tv's).</small>
+      </label>
+      <label class="check"><input type="checkbox" name="screen_always_on" value="1" {% if conf.screen_always_on %}checked{% endif %} data-toggle-target="#screen-off"> Scherm altijd aan (geen screensaver of energiebeheer)</label>
+      <label id="screen-off">Scherm uitschakelen na (minuten zonder invoer)
+        <input type="number" name="screen_off_minutes" min="1" max="240" value="{{ conf.screen_off_minutes }}">
+      </label>
+      <label class="check"><input type="checkbox" name="apply_now" value="1" checked> Direct toepassen (Chromium herstart)</label>
+      <button type="submit" class="btn btn-primary">Opslaan</button>
+    </form>
+  </section>
+
+  <section class="card">
+    <h2>Hostname</h2>
+    <form method="post" action="{{ url_for('ui.system_hostname') }}" class="form">
+      {{ csrf() }}
+      <label>Hostname
+        <input type="text" name="hostname" value="{{ hostname }}" required maxlength="63" pattern="[a-zA-Z0-9]([a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?" autocomplete="off" spellcheck="false">
+        <small>De beheerinterface is daarna bereikbaar via <code>http://&lt;hostname&gt;.local:{{ conf.admin_port }}</code>. Geef iedere kiosk op hetzelfde netwerk een unieke naam.</small>
+      </label>
+      <button type="submit" class="btn btn-primary">Hostname wijzigen</button>
+    </form>
+
+    <h2 class="mt">Beheerinterface</h2>
+    <form method="post" action="{{ url_for('ui.system_admin') }}" class="form" data-confirm="Als je poort of HTTPS wijzigt, herstart de beheerinterface en word je doorgestuurd naar het nieuwe adres." data-confirm-title="Beheerinterface aanpassen">
+      {{ csrf() }}
+      <label>Poort
+        <input type="number" name="admin_port" min="1024" max="65535" value="{{ conf.admin_port }}">
+      </label>
+      <label class="check"><input type="checkbox" name="admin_https" value="1" {% if conf.admin_https %}checked{% endif %}> HTTPS gebruiken (zelfondertekend certificaat)</label>
+      <label class="check"><input type="checkbox" name="admin_allow_public" value="1" {% if conf.admin_allow_public %}checked{% endif %}> Toegang vanaf publieke IP-adressen toestaan <span class="muted">(afgeraden; gebruik liever VPN)</span></label>
+      <button type="submit" class="btn btn-secondary">Opslaan</button>
+    </form>
+  </section>
+</div>
+
+<section class="card" id="updates">
+  <h2>Software-updates</h2>
+  <dl class="kv">
+    <dt>Geïnstalleerd</dt><dd>Daynivo Kiosk OS {{ s.version }}</dd>
+    <dt>Nieuwste versie</dt>
+    <dd>
+      {% if update.check_error %}<span class="muted">Onbekend — controleren mislukt: {{ update.check_error }}</span>
+      {% elif update.latest %}{{ update.latest }}{% if update.available %} <strong>— beschikbaar</strong>{% else %} <span class="muted">(je bent bij)</span>{% endif %}
+      {% else %}<span class="muted">Nog niet gecontroleerd</span>{% endif %}
+    </dd>
+    {% if update.checked %}<dt>Gecontroleerd</dt><dd>{{ update.checked }}</dd>{% endif %}
+    {% if update.running %}<dt>Status</dt><dd>Bezig met bijwerken naar {{ update.target }}…</dd>
+    {% elif update.status == 'failed' %}<dt>Laatste update</dt><dd>Mislukt{% if update.finished %} op {{ update.finished }}{% endif %}: {{ update.install_error }}</dd>
+    {% elif update.status == 'done' and update.finished %}<dt>Laatste update</dt><dd>Gelukt op {{ update.finished }}</dd>{% endif %}
+  </dl>
+
+  <form method="post" action="{{ url_for('ui.system_updates') }}" class="form mt-sm">
+    {{ csrf() }}
+    <label class="check"><input type="checkbox" name="auto_update" value="1" {% if conf.auto_update %}checked{% endif %}> Automatisch bijwerken <span class="muted">(elke nacht tussen 03:00 en 05:00, als er een nieuwe versie is)</span></label>
+    <button type="submit" class="btn btn-secondary">Opslaan</button>
+  </form>
+
+  <div class="actions-row mt-sm">
+    <form method="post" action="{{ url_for('ui.system_update_check') }}" class="inline-form">{{ csrf() }}<button type="submit" class="btn btn-secondary">Nu controleren</button></form>
+    {% if update.available and not update.running %}
+    <form method="post" action="{{ url_for('ui.system_update_install') }}" class="inline-form"
+          data-confirm="Daynivo Kiosk OS wordt bijgewerkt naar {{ update.latest }}. Het scherm en de beheerinterface zijn een paar minuten niet beschikbaar." data-confirm-title="Nu bijwerken">
+      {{ csrf() }}<button type="submit" class="btn btn-primary">Bijwerken naar {{ update.latest }}</button>
+    </form>
+    {% endif %}
+  </div>
+  <p class="muted small">De configuratie blijft behouden en wordt voor elke update eerst bewaard in <code>/var/backups</code>.</p>
+</section>
+
+<section class="card">
+  <h2>Systeeminformatie</h2>
+  <dl class="kv">
+    <dt>Versie</dt><dd>Daynivo Kiosk OS {{ s.version }}</dd>
+    <dt>Besturingssysteem</dt><dd>{{ s.os }}</dd>
+    <dt>Hardware</dt><dd>{{ s.model }}</dd>
+    <dt>Uptime</dt><dd>{{ s.uptime }}</dd>
+  </dl>
+  <p><a href="{{ url_for('ui.logs', source='system') }}">Systeemlogs bekijken →</a></p>
+</section>
+{% endblock %}

src/daynivo_kiosk/web/views.py

@@ -0,0 +1,603 @@
+"""Routes of the Daynivo Kiosk Manager."""
+
+from __future__ import annotations
+
+import json
+import logging
+import socket
+import time
+from typing import Any
+
+from flask import (Blueprint, Response, abort, current_app, flash, g, jsonify, redirect, render_template, request,
+                   session, url_for)
+
+from .. import netconfig, netinfo, services, sysinfo
+from ..agent import read_state
+from ..updater import read_state as read_update_state
+from ..cdp import CDPError
+from ..config import ConfigError, load_config, save_config
+from ..helper_client import HelperError
+from ..validation import ValidationError, mask_url
+from . import security
+from .auth import password_problem
+
+bp = Blueprint("ui", __name__)
+audit_log = logging.getLogger("voxip-kiosk-audit")
+
+IDLE_TIMEOUT = 3600
+PUBLIC_ENDPOINTS = {"ui.login", "ui.setup", "static"}
+
+
+def svc():
+    return current_app.extensions["voxip"]
+
+
+def cfg() -> dict[str, Any]:
+    if "cfg" not in g:
+        g.cfg = load_config(svc().paths.config_file)
+    return g.cfg
+
+
+def client_ip() -> str:
+    return request.remote_addr or "?"
+
+
+def audit(event: str, **details: Any) -> None:
+    record = {"time": int(time.time()), "event": event, "ip": client_ip(), **details}
+    audit_log.info(json.dumps(record, ensure_ascii=False))
+    try:
+        with open(svc().paths.audit_log, "a", encoding="utf-8") as fh:
+            fh.write(json.dumps(record, ensure_ascii=False) + "\n")
+    except OSError:
+        pass
+
+
+def wants_json() -> bool:
+    return request.path.startswith("/api/") or request.headers.get("Accept", "").startswith("application/json")
+
+
+_local_nets_cache: tuple[float, list[str]] = (0.0, [])
+
+
+def local_networks() -> list[str]:
+    global _local_nets_cache
+    now = time.monotonic()
+    if now - _local_nets_cache[0] > 60:
+        nets = [a for addrs in sysinfo.ip_addresses().values() for a in addrs]
+        _local_nets_cache = (now, nets)
+    return _local_nets_cache[1]
+
+
+# -- request pipeline ----------------------------------------------------------
+
+@bp.before_app_request
+def guard():
+    if not security.client_allowed(request.remote_addr, cfg()["admin_allow_public"], local_networks()):
+        abort(403)
+    if request.endpoint == "static":
+        return None
+    creds = svc().credentials
+    if not creds.is_configured():
+        if request.endpoint != "ui.setup":
+            return redirect(url_for("ui.setup"))
+    elif request.endpoint == "ui.setup":
+        return redirect(url_for("ui.dashboard"))
+
+    if session.get("auth"):
+        expired = time.time() - session.get("seen", 0) > IDLE_TIMEOUT
+        if expired or session.get("epoch") != creds.session_epoch():
+            session.clear()
+            flash("Je sessie is verlopen. Log opnieuw in.", "info")
+    if request.endpoint not in PUBLIC_ENDPOINTS and not session.get("auth"):
+        if wants_json():
+            return jsonify(error="Niet ingelogd"), 401
+        return redirect(url_for("ui.login"))
+    if session.get("auth"):
+        session["seen"] = int(time.time())
+
+    if request.method == "POST" and not security.csrf_valid(request):
+        audit("csrf_rejected", path=request.path)
+        if wants_json():
+            return jsonify(error="Beveiligingstoken ongeldig. Herlaad de pagina."), 400
+        flash("Beveiligingstoken ongeldig of verlopen. Probeer het opnieuw.", "error")
+        return redirect(request.path if request.endpoint in PUBLIC_ENDPOINTS else url_for("ui.dashboard")), 303
+    return None
+
+
+@bp.after_app_request
+def headers(response: Response):
+    return security.apply_headers(response, secure=current_app.config["SESSION_COOKIE_SECURE"])
+
+
+@bp.app_context_processor
+def template_globals():
+    return {
+        "csrf_token": security.csrf_token,
+        "version": svc().version,
+        "device_name": cfg()["device_name"],
+        "hostname": socket.gethostname().split(".")[0],
+        "logged_in": bool(session.get("auth")),
+        "admin_port": cfg()["admin_port"],
+        "admin_scheme": "https" if cfg()["admin_https"] else "http",
+    }
+
+
+@bp.app_errorhandler(403)
+def forbidden(_):
+    return render_template("error.html", title="Geen toegang",
+                           message="De beheerinterface is alleen bereikbaar vanaf het lokale netwerk of via VPN."), 403
+
+
+@bp.app_errorhandler(404)
+def not_found(_):
+    return render_template("error.html", title="Niet gevonden", message="Deze pagina bestaat niet."), 404
+
+
+@bp.app_errorhandler(413)
+def too_large(_):
+    return render_template("error.html", title="Te groot", message="Het verzoek is te groot."), 413
+
+
+# -- setup & login --------------------------------------------------------------
+
+@bp.route("/setup", methods=["GET", "POST"])
+def setup():
+    creds = svc().credentials
+    error = None
+    if request.method == "POST":
+        ip = client_ip()
+        wait = svc().throttle.retry_after(ip)
+        password = request.form.get("password", "")
+        if wait:
+            error = f"Te veel pogingen. Probeer het over {wait} seconden opnieuw."
+        elif not creds.check_setup_code(request.form.get("setup_code", "")):
+            svc().throttle.failure(ip)
+            audit("setup_code_rejected")
+            error = "De setupcode klopt niet. Je vindt de code op het scherm van de kiosk."
+        else:
+            error = password_problem(password, request.form.get("password_confirm", ""))
+            if error is None:
+                epoch = creds.set_password(password)
+                svc().throttle.success(ip)
+                session.clear()
+                session.update(auth=True, epoch=epoch, seen=int(time.time()))
+                session.permanent = True
+                audit("setup_completed")
+                flash("Het beheerderswachtwoord is ingesteld. Welkom!", "success")
+                return redirect(url_for("ui.dashboard"))
+    return render_template("setup.html", error=error)
+
+
+@bp.route("/login", methods=["GET", "POST"])
+def login():
+    if session.get("auth"):
+        return redirect(url_for("ui.dashboard"))
+    error = None
+    if request.method == "POST":
+        ip = client_ip()
+        wait = svc().throttle.retry_after(ip)
+        if wait:
+            error = f"Te veel mislukte pogingen. Probeer het over {wait} seconden opnieuw."
+        elif svc().credentials.verify(request.form.get("password", "")):
+            svc().throttle.success(ip)
+            session.clear()
+            session.update(auth=True, epoch=svc().credentials.session_epoch(), seen=int(time.time()))
+            session.permanent = True
+            audit("login")
+            return redirect(url_for("ui.dashboard"))
+        else:
+            svc().throttle.failure(ip)
+            audit("login_failed")
+            error = "Onjuist wachtwoord."
+    return render_template("login.html", error=error)
+
+
+@bp.post("/logout")
+def logout():
+    audit("logout")
+    session.clear()
+    flash("Je bent uitgelogd.", "info")
+    return redirect(url_for("ui.login"))
+
+
+@bp.route("/account/password", methods=["GET", "POST"])
+def change_password():
+    if request.method == "POST":
+        creds = svc().credentials
+        if not creds.verify(request.form.get("current_password", "")):
+            audit("password_change_failed")
+            flash("Het huidige wachtwoord klopt niet.", "error")
+        else:
+            password = request.form.get("password", "")
+            problem = password_problem(password, request.form.get("password_confirm", ""))
+            if problem:
+                flash(problem, "error")
+            else:
+                epoch = creds.set_password(password)
+                session["epoch"] = epoch
+                audit("password_changed")
+                flash("Wachtwoord gewijzigd. Andere sessies zijn uitgelogd.", "success")
+                return redirect(url_for("ui.dashboard"))
+    return render_template("password.html", active="account")
+
+
+# -- dashboard -------------------------------------------------------------------
+
+def browser_state(units: dict[str, Any], agent: dict[str, Any]) -> tuple[str, str]:
+    unit = units.get("browser", {})
+    if unit.get("status") != "ok":
+        return unit.get("status", "unknown"), unit.get("label", "Onbekend")
+    if agent.get("browser") == "unreachable":
+        return "starting", "Bezig met starten"
+    page = agent.get("page")
+    if page == "offline":
+        return "warning", "Actief — offlinepagina"
+    if page == "setup":
+        return "warning", "Actief — wacht op initiële configuratie"
+    if page in ("start", "blank", "error"):
+        return "starting", "Pagina wordt geladen"
+    return "ok", "Actief"
+
+
+def collect_status() -> dict[str, Any]:
+    conf = cfg()
+    paths = svc().paths
+    agent = read_state(paths.agent_state_file)
+    units = services.summary()
+    b_status, b_label = browser_state(units, agent)
+    mem = sysinfo.memory()
+    disk = sysinfo.disk("/")
+    temp = sysinfo.temperature_c()
+    load = sysinfo.load_average()
+    cpu = sysinfo.cpu_percent()
+    throttle = sysinfo.throttled()
+    reachable = agent.get("target_reachable")
+    if reachable is None:
+        net_status, net_label = "unknown", "Nog niet gecontroleerd"
+    elif reachable:
+        net_status, net_label = "ok", "Online — kiosk-URL bereikbaar"
+    else:
+        net_status, net_label = "error", f"Offline — {agent.get('reason') or 'niet bereikbaar'}"
+    addresses = sysinfo.ip_addresses()
+    return {
+        "browser": {"status": b_status, "label": b_label, "restarts": units.get("browser", {}).get("restarts", "0")},
+        "agent": units.get("agent", {}),
+        "url": mask_url(conf["url"]),
+        "refresh_interval": conf["refresh_interval"],
+        "uptime": sysinfo.format_duration(sysinfo.uptime_seconds()),
+        "cpu": f"{cpu:.0f}%".replace(".", ",") if cpu is not None else "–",
+        "cpu_percent": cpu or 0,
+        "load": " / ".join(f"{x:.2f}".replace(".", ",") for x in load) if load else "–",
+        "temperature": f"{temp:.1f} °C".replace(".", ",") if temp is not None else "–",
+        "temperature_status": "error" if temp and temp >= 80 else "warning" if temp and temp >= 70 else "ok",
+        "memory": f"{sysinfo.format_bytes(mem['used'])} van {sysinfo.format_bytes(mem['total'])}" if mem else "–",
+        "memory_percent": mem["percent"] if mem else 0,
+        "disk": f"{sysinfo.format_bytes(disk['used'])} van {sysinfo.format_bytes(disk['total'])}" if disk else "–",
+        "disk_percent": disk["percent"] if disk else 0,
+        "eth0": ", ".join(addresses.get("eth0", [])) or "Niet verbonden",
+        "wlan0": ", ".join(addresses.get("wlan0", [])) or "Niet verbonden",
+        "network": {"status": net_status, "label": net_label},
+        "power": {"status": "error" if throttle and throttle["now"] else "warning" if throttle and throttle["ever"] else "ok",
+                  "label": ", ".join(throttle["flags"]) if throttle and throttle["flags"] else "In orde"} if throttle else None,
+        "last_error": agent.get("last_error"),
+        "version": svc().version,
+        "os": sysinfo.os_release(),
+        "model": sysinfo.model(),
+    }
+
+
+@bp.get("/")
+def dashboard():
+    return render_template("dashboard.html", active="dashboard", s=collect_status())
+
+
+@bp.get("/api/status")
+def api_status():
+    return jsonify(collect_status())
+
+
+# -- kiosk -----------------------------------------------------------------------
+
+@bp.get("/kiosk")
+def kiosk():
+    agent = read_state(svc().paths.agent_state_file)
+    return render_template("kiosk.html", active="kiosk", conf=cfg(), agent=agent,
+                           errors=services.recent_errors(25), masked_url=mask_url(cfg()["url"]),
+                           s={"browser": dict(zip(("status", "label"), browser_state(services.summary(), agent)))})
+
+
+def _form_bool(name: str) -> bool:
+    return request.form.get(name) in ("1", "on", "true", "yes")
+
+
+def _save(updates: dict[str, Any]) -> dict[str, Any] | None:
+    try:
+        return save_config(svc().paths.config_file, updates)
+    except ConfigError as exc:
+        for message in exc.errors.values():
+            flash(message, "error")
+    except OSError as exc:
+        flash(f"Opslaan mislukt: {exc}", "error")
+    return None
+
+
+@bp.post("/kiosk/settings")
+def kiosk_settings():
+    updates = {
+        "url": request.form.get("url", ""),
+        "device_name": request.form.get("device_name", ""),
+        "refresh_interval": request.form.get("refresh_interval", "0"),
+        "browser_restart": _form_bool("browser_restart"),
+        "browser_profile": request.form.get("browser_profile", "persistent"),
+    }
+    old = cfg()
+    new = _save(updates)
+    if new is not None:
+        changed = sorted(k for k in updates if old.get(k) != new.get(k))
+        audit("kiosk_settings", changed=changed, url=mask_url(new["url"]))
+        message = "Instellingen opgeslagen."
+        if "url" in changed:
+            message += " De kiosk opent de nieuwe URL binnen enkele seconden."
+        if "browser_profile" in changed:
+            message += " Het profieltype geldt na het herstarten van Chromium."
+        flash(message, "success")
+    return redirect(url_for("ui.kiosk"))
+
+
+def _action_response(ok: bool, message: str, back: str):
+    if wants_json():
+        return jsonify(ok=ok, message=message), (200 if ok else 500)
+    flash(message, "success" if ok else "error")
+    return redirect(back)
+
+
+@bp.post("/kiosk/reload")
+def kiosk_reload():
+    try:
+        svc().cdp.reload()
+        audit("page_reload")
+        return _action_response(True, "De pagina wordt herladen.", request.referrer or url_for("ui.dashboard"))
+    except CDPError as exc:
+        current_app.logger.warning("Herladen mislukt: %s", exc)
+        return _action_response(
+            False,
+            "Herladen mislukt: Chromium reageert niet. Als hij net (her)start, probeer het over een halve minuut opnieuw.",
+            request.referrer or url_for("ui.dashboard"),
+        )
+
+
+def _helper_action(event: str, verb: str, *args: str, back: str):
+    try:
+        result = svc().helper.call(verb, *args)
+        audit(event, **({"args": list(args)} if args else {}))
+        return _action_response(True, result.get("message", "Uitgevoerd."), back)
+    except HelperError as exc:
+        audit(event + "_failed", error=str(exc))
+        return _action_response(False, str(exc), back)
+
+
+@bp.post("/kiosk/restart")
+def kiosk_restart():
+    return _helper_action("browser_restart", "restart-browser", back=request.referrer or url_for("ui.dashboard"))
+
+
+@bp.get("/kiosk/screenshot.jpg")
+def kiosk_screenshot():
+    try:
+        data = svc().cdp.screenshot(quality=70)
+    except CDPError as exc:
+        return Response(f"Screenshot niet beschikbaar: {exc}", status=503, mimetype="text/plain")
+    return Response(data, mimetype="image/jpeg")
+
+
+# -- system ----------------------------------------------------------------------
+
+def display_info() -> dict[str, Any]:
+    try:
+        return json.loads(svc().paths.display_info_file.read_text(encoding="utf-8"))
+    except (OSError, ValueError):
+        return {}
+
+
+@bp.get("/system")
+def system():
+    info = display_info()
+    outputs = info.get("outputs") or []
+    modes = outputs[0]["modes"] if outputs else []
+    return render_template("system.html", active="system", conf=cfg(), modes=modes,
+                           output=outputs[0] if outputs else None, s=collect_status(), update=update_view())
+
+
+def _when(timestamp: Any) -> str | None:
+    if not isinstance(timestamp, (int, float)):
+        return None
+    return time.strftime("%d-%m-%Y %H:%M", time.localtime(timestamp))
+
+
+def update_view() -> dict[str, Any]:
+    """The updater's last result (update.json, written by root) in display form."""
+    state = read_update_state(svc().paths)
+    return {
+        **state,
+        "checked": _when(state.get("checked_at")),
+        "finished": _when(state.get("finished_at")),
+        # A run that started more than two hours ago and never finished is reported as failed.
+        "running": state.get("status") == "updating" and time.time() - state.get("started_at", 0) < 7200,
+    }
+
+
+@bp.post("/system/display")
+def system_display():
+    updates = {
+        "rotation": request.form.get("rotation", "0"),
+        "resolution": request.form.get("resolution", "auto"),
+        "zoom": request.form.get("zoom", "1").replace(",", "."),
+        "screen_always_on": _form_bool("screen_always_on"),
+        "screen_off_minutes": request.form.get("screen_off_minutes", "10"),
+    }
+    if _save(updates) is None:
+        return redirect(url_for("ui.system"))
+    audit("display_settings", **{k: v for k, v in updates.items()})
+    if _form_bool("apply_now"):
+        return _helper_action("browser_restart", "restart-browser", back=url_for("ui.system"))
+    flash("Scherminstellingen opgeslagen. Ze worden actief bij de volgende herstart van Chromium.", "success")
+    return redirect(url_for("ui.system"))
+
+
+@bp.post("/system/hostname")
+def system_hostname():
+    return _helper_action("hostname", "set-hostname", request.form.get("hostname", "").strip().lower(), back=url_for("ui.system"))
+
+
+@bp.post("/system/reboot")
+def system_reboot():
+    return _helper_action("reboot", "reboot", back=url_for("ui.dashboard"))
+
+
+@bp.post("/system/poweroff")
+def system_poweroff():
+    return _helper_action("poweroff", "poweroff", back=url_for("ui.dashboard"))
+
+
+@bp.post("/system/admin")
+def system_admin():
+    updates = {
+        "admin_port": request.form.get("admin_port", "8080"),
+        "admin_https": _form_bool("admin_https"),
+        "admin_allow_public": _form_bool("admin_allow_public"),
+    }
+    old = cfg()
+    new = _save(updates)
+    if new is None:
+        return redirect(url_for("ui.system"))
+    audit("admin_settings", **updates)
+    if any(old[k] != new[k] for k in ("admin_port", "admin_https")):
+        scheme = "https" if new["admin_https"] else "http"
+        target = f"{scheme}://{request.host.rsplit(':', 1)[0]}:{new['admin_port']}/"
+        try:
+            svc().helper.call("restart-manager")
+        except HelperError as exc:
+            flash(f"Opgeslagen, maar herstarten van de beheerinterface mislukte: {exc}", "error")
+            return redirect(url_for("ui.system"))
+        return render_template("moved.html", target=target)
+    flash("Instellingen opgeslagen.", "success")
+    return redirect(url_for("ui.system"))
+
+
+@bp.post("/system/updates")
+def system_updates():
+    auto = _form_bool("auto_update")
+    if _save({"auto_update": auto}) is not None:
+        audit("update_settings", auto_update=auto)
+        flash("Automatisch bijwerken staat " + ("aan." if auto else "uit."), "success")
+    return redirect(url_for("ui.system") + "#updates")
+
+
+@bp.post("/system/update/check")
+def system_update_check():
+    back = url_for("ui.system") + "#updates"
+    try:
+        state = svc().helper.call("update-check", timeout=60).get("update", {})
+    except HelperError as exc:
+        return _action_response(False, str(exc), back)
+    if state.get("check_error"):
+        return _action_response(False, f"Controleren mislukt: {state['check_error']}", back)
+    if state.get("available"):
+        return _action_response(True, f"Versie {state.get('latest')} is beschikbaar.", back)
+    return _action_response(True, f"Je hebt de nieuwste versie ({state.get('current')}).", back)
+
+
+@bp.post("/system/update/install")
+def system_update_install():
+    return _helper_action("update_install", "update-install", back=url_for("ui.system") + "#updates")
+
+
+# -- logs ------------------------------------------------------------------------
+
+@bp.get("/logs")
+def logs():
+    source = request.args.get("source", "kiosk")
+    if source not in services.LOG_SOURCES:
+        source = "kiosk"
+    try:
+        lines = int(request.args.get("lines", 100))
+    except ValueError:
+        lines = 100
+    priority = request.args.get("priority") or None
+    text = services.journal(source, lines, priority)
+    return render_template("logs.html", active="logs", text=text, source=source, lines=lines, priority=priority,
+                           sources=services.LOG_SOURCES, line_options=services.LOG_LINES)
+
+
+# -- network -----------------------------------------------------------------------
+
+def _pending() -> dict[str, Any] | None:
+    pending = netinfo.pending_change(svc().paths.network_pending_file)
+    if pending:
+        pending = {k: pending.get(k) for k in ("interface", "method", "address", "created", "deadline")}
+        pending["remaining"] = max(0, int(pending.get("deadline") or 0) - int(time.time()))
+    return pending
+
+
+@bp.get("/network")
+def network():
+    return render_template("network.html", active="network", net=netinfo.overview(), pending=_pending(),
+                           rollback_seconds=netconfig.ROLLBACK_SECONDS)
+
+
+@bp.get("/api/network/pending")
+def api_network_pending():
+    return jsonify(pending=_pending())
+
+
+@bp.post("/network/apply")
+def network_apply():
+    interface = request.form.get("interface", "")
+    payload: dict[str, Any] = {
+        "interface": interface,
+        "method": request.form.get("method", "dhcp"),
+        "address": request.form.get("address", ""),
+        "gateway": request.form.get("gateway", ""),
+        "dns": request.form.get("dns", ""),
+    }
+    if interface == "wlan0":
+        payload["wifi"] = {
+            "ssid": request.form.get("ssid", ""),
+            "psk": request.form.get("psk", ""),
+            "hidden": _form_bool("hidden"),
+            "open": _form_bool("open"),
+        }
+    try:
+        netconfig.validate_request(payload)  # early feedback; the helper validates again
+        svc().helper.call("network-apply", payload=payload, timeout=60)
+    except (ValidationError, HelperError) as exc:
+        flash(str(exc), "error")
+        return redirect(url_for("ui.network"))
+    audit("network_apply", interface=interface, method=payload["method"], address=payload["address"])
+    flash(f"Netwerkwijziging toegepast. Bevestig binnen {netconfig.ROLLBACK_SECONDS // 60} minuten, anders worden de "
+          "vorige instellingen automatisch teruggezet.", "warning")
+    return redirect(url_for("ui.network"))
+
+
+@bp.post("/network/confirm")
+def network_confirm():
+    return _helper_action("network_confirm", "network-confirm", back=url_for("ui.network"))
+
+
+@bp.post("/network/rollback")
+def network_rollback():
+    return _helper_action("network_rollback", "network-rollback", back=url_for("ui.network"))
+
+
+@bp.post("/network/country")
+def network_country():
+    return _helper_action("wifi_country", "set-wifi-country", request.form.get("country", "").strip().upper(), back=url_for("ui.network"))
+
+
+@bp.post("/api/network/scan")
+def network_scan():
+    try:
+        result = svc().helper.call("wifi-scan", timeout=60)
+    except HelperError as exc:
+        return jsonify(error=str(exc)), 500
+    return jsonify(networks=result.get("networks", []))