Rename the web interface to Daynivo Kiosk Manager with the Daynivo logo

The Daynivo mark sits on a small white tile in the navy bar, where its
navy parts would otherwise disappear; the favicon is Daynivo's too.

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

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "voxip-kiosk"
 dynamic = ["version"]
-description = "VoxIP Kiosk OS — kiosk runtime and VoxIP Kiosk Manager"
+description = "VoxIP Kiosk OS — kiosk runtime and Daynivo Kiosk Manager"
 requires-python = ">=3.11"
 
 [tool.pytest.ini_options]