Check the Capacitor support on real phones #337

#308 added Capacitor support. It was checked on an Android 16 emulator, an Android 16 Pixel Fold emulator and an iOS simulator, but not on a real phone yet.

Still to check

• Android phone over USB, with live reload through adb reverse
• Android phone over Wi-Fi, with live reload on the LAN address and the Express hub with allowedOrigins
• iPhone over Wi-Fi with live reload, and a bundled build from capacitor://localhost
• Typing the one-time code into the native iOS dialog
• iOS: whether plain HTTP to a LAN address needs NSAllowsLocalNetworking, and what happens when the Local Network prompt is denied
• CapacitorHttp detection on iOS, off and on
• Android: whether allowMixedContent is needed on its own (server.cleartext is required, even for localhost)
• Backgrounding for 30 seconds and for 6 minutes: does the page reconnect, and does it expire and come back in the panel?
• Two devices at once: the panel doesn't jump between pages, and the page picker works
• navigate through MCP on an app with more than one route
• The Geolocation watch shows as a stream, and the panel stays responsive

Already confirmed on emulators

• Android bundled build with the CLI: connection, native code prompt, pairing token, Capacitor (android) label, calls, redaction, CapacitorHttp off and on, CORS header values, the plugin notes, the Foldable card following fold events, the listener leak warning, inspect-component and highlight, and no overlay in a production build.
• iOS simulator: reached the server from capacitor://localhost without an ATS change, and showed the native code prompt.

Fix what a real phone finds, and update apps/docs/src/content/guides/capacitor.md with the answers.