feat: implement voice input feature with press-and-hold gesture

- Added new language strings for voice input functionality in English and Chinese.
- Updated manifest to include microphone permission for voice recording.
- Enhanced ai-chat-message component to support voice input with visual feedback for recording and cancellation gestures.
- Integrated voice recorder functionality in ai-chat-voice-panel, allowing users to record audio with a maximum duration of 60 seconds.
- Implemented audio handling logic to upload recorded audio files and display them in the chat interface.
- Added error handling for voice recording failures and user notifications.
- Updated styles for improved UI/UX during voice recording interactions.

lang/en-us/ai-chat/index.js

@@ -136,6 +136,18 @@ export const lang = {
 	recordingTip: 'Recording, release to end',
 	startRecordTip: 'Tap to start recording',
 	voiceInputFailed: 'Voice input failed',
+	// PR-FRONTEND-VOICE-INPUT (2026-09-24): press-and-hold gesture + recorder error messages
+	holdToTalk: 'Hold to talk',
+	releaseToSend: 'Release to send',
+	releaseToCancel: 'Release to cancel',
+	slideUpToCancel: '↑ Slide up to cancel',
+	slideUpToCancelHint: '↑ Release to cancel',
+	voiceStartFailed: 'Cannot start recording',
+	voiceStopFailed: 'Recording failed, please try again',
+	voiceNotSupported: 'Voice input is not supported on this platform',
+	// PR-FRONTEND-VOICE-INPUT (2026-09-24): upload error (recorder result -> cloud)
+	uploadFailed: 'Upload failed',
+	uploadFailedWithReason: 'Upload failed: {reason}',
 
 	// ====== index.vue - Menu ======
 	menuClearChat: 'Clear Chat',