Adds `deflockapp://node?id=<nodeId>` deep link support: parses the node
ID, fetches the OSM node via the public API, and delivers it via an
`onNodeDeepLink` callback for HomeScreen to register. Includes URL
parsing unit tests.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
flockhopperdev