fix(mobile): lift composer by Capacitor Keyboard plugin height (resize:none, vv doesn't reflect kbd)

Device log (post-zoom-fix): keyboard open leaves clientHeight AND visualViewport at 926 -> vv gives 0 ->
composer covered. On resize:none the plugin's keyboardHeight is the only signal; now that zoom is gone
it's clean, so --kb = keyboardHeight lifts the composer flush, and keyboardWillShow at animation start +
the CSS bottom-transition makes it slide up WITH the keyboard (smooth). Config pinned to resize:none.
Build marker -> 2026-07-18-batch112.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

mobile/capacitor.config.json

@@ -17,7 +17,7 @@
       "offsetForKeyboardInsetBug": false
     },
     "Keyboard": {
-      "resize": "native"
+      "resize": "none"
     },
     "SplashScreen": {
       "launchShowDuration": 900,