Fix sing-to-Blobbi mic access on Android and preview playback on iOS

The sing action uses getUserMedia + MediaRecorder, which in a browser is
gated only by the standard web mic prompt. In Capacitor's Android
WebView it additionally requires the RECORD_AUDIO permission to be
declared in AndroidManifest.xml; without it the WebView rejects with
NotAllowedError and no system prompt is ever shown, so tapping record
silently fails on the Android app while working fine in the browser.

Also add MODIFY_AUDIO_SETTINGS, which some devices require for the
echoCancellation / noiseSuppression / autoGainControl constraints that
InlineSingCard passes to getUserMedia.

Separately, reorder AUDIO_MIME_CANDIDATES to prefer audio/mp4/aac over
audio/webm;codecs=opus. iOS WKWebView cannot decode WebM/Opus in an
<audio> element, so the recorded Blob's preview URL failed to load on
iOS. Android WebView and desktop Chromium both support mp4/aac, so
preferring it first is safe cross-platform. This mirrors the ordering
already used by useVoiceRecorder.ts.

android/app/src/main/AndroidManifest.xml

@@ -58,4 +58,6 @@
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
 </manifest>

src/blobbi/actions/components/InlineSingCard.tsx

@@ -39,10 +39,16 @@ interface InlineSingCardProps {
 
 // ─── MIME Type Selection ──────────────────────────────────────────────────────
 
+// Prefer mp4/aac first so the recorded Blob can be decoded by <audio> on
+// iOS WKWebView (which does not support WebM/Opus playback). Android WebView
+// and desktop Chromium still support mp4/aac, so putting it first is safe
+// cross-platform. See also useVoiceRecorder.ts which follows the same order.
 const AUDIO_MIME_CANDIDATES = [
+  'audio/mp4',
+  'audio/mp4;codecs=aac',
+  'audio/aac',
   'audio/webm;codecs=opus',
   'audio/webm',
-  'audio/mp4',
   'audio/ogg;codecs=opus',
   'audio/ogg',
 ] as const;