chore: apply oxlint autofix (safe level)

Auto-fixed 102 warnings (6040 → 5938) across 57 files. Main categories:
- preserve-caught-error: add { cause: error } to re-thrown errors
- unicorn/no-array-reverse: .reverse() → .toReversed()
- unicorn/no-useless-fallback-in-spread: drop unnecessary ?? {} in spreads
- oxc/no-map-spread: rewrite object spread in .map() to Object.assign
- react-hooks/exhaustive-deps: trim module-level constants from dep arrays

Ran npm run format after to clean up whitespace from lint mutations.

packages/app/src/hooks/use-audio-recorder.native.ts

@@ -227,7 +227,7 @@ export function useAudioRecorder(config?: AudioCaptureConfig) {
       if (error?.message !== "Recording cancelled") {
         console.error("[AudioRecorder] Failed to start recording:", error);
       }
-      throw new Error(`Failed to start audio recording: ${error.message}`);
+      throw new Error(`Failed to start audio recording: ${error.message}`, { cause: error });
     }
   }, [recordingOptions.sampleRate, recordingOptions.numberOfChannels, recordingOptions.bitRate]);
 
@@ -293,7 +293,7 @@ export function useAudioRecorder(config?: AudioCaptureConfig) {
     } catch (error: any) {
       setRecordingStartTime(null);
       console.error("[AudioRecorder] Failed to stop recording:", error);
-      throw new Error(`Failed to stop audio recording: ${error.message}`);
+      throw new Error(`Failed to stop audio recording: ${error.message}`, { cause: error });
     } finally {
       startStopMutexRef.current = null;
     }

packages/app/src/hooks/use-audio-recorder.web.ts

@@ -190,7 +190,7 @@ export function useAudioRecorder(config?: AudioCaptureConfig) {
     try {
       stream = await navigator.mediaDevices.getUserMedia(constraints);
     } catch (error: any) {
-      throw new Error(`Failed to access microphone: ${error?.message ?? error}`);
+      throw new Error(`Failed to access microphone: ${error?.message ?? error}`, { cause: error });
     }
 
     try {
@@ -225,7 +225,9 @@ export function useAudioRecorder(config?: AudioCaptureConfig) {
       recorder = new MediaRecorder(stream, recorderOptions);
     } catch (error: any) {
       cleanupStream();
-      throw new Error(`Failed to initialize recorder: ${error?.message ?? error}`);
+      throw new Error(`Failed to initialize recorder: ${error?.message ?? error}`, {
+        cause: error,
+      });
     }
 
     mediaRecorderRef.current = recorder;