feat(native): record encoding (#14188)

fix #13784 

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Start/stop system or meeting recordings with Ogg/Opus artifacts and
native start/stop APIs; workspace backup recovery.

* **Refactor**
* Simplified recording lifecycle and UI flows; native runtime now
orchestrates recording/processing and reporting.

* **Bug Fixes**
* Stronger path validation, safer import/export dialogs, consistent
error handling/logging, and retry-safe recording processing.

* **Chores**
* Added cross-platform native audio capture and Ogg/Opus encoding
support.

* **Tests**
* New unit, integration, and e2e tests for recording, path guards,
dialogs, and workspace recovery.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/utils/opus-encoding.ts

@@ -414,98 +414,3 @@ export async function encodeAudioBlobToOpusSlices(
     await audioContext.close();
   }
 }
-
-export const createStreamEncoder = (
-  recordingId: number,
-  codecs: {
-    sampleRate: number;
-    numberOfChannels: number;
-    targetBitrate?: number;
-  }
-) => {
-  const { encoder, encodedChunks } = createOpusEncoder({
-    sampleRate: codecs.sampleRate,
-    numberOfChannels: codecs.numberOfChannels,
-    bitrate: codecs.targetBitrate,
-  });
-
-  const toAudioData = (buffer: Uint8Array) => {
-    // Each sample in f32 format is 4 bytes
-    const BYTES_PER_SAMPLE = 4;
-    return new AudioData({
-      format: 'f32',
-      sampleRate: codecs.sampleRate,
-      numberOfChannels: codecs.numberOfChannels,
-      numberOfFrames:
-        buffer.length / BYTES_PER_SAMPLE / codecs.numberOfChannels,
-      timestamp: 0,
-      data: toArrayBuffer(buffer),
-    });
-  };
-
-  let cursor = 0;
-  let isClosed = false;
-
-  const next = async () => {
-    if (!apis) {
-      throw new Error('Electron API is not available');
-    }
-    if (isClosed) {
-      return;
-    }
-    const { buffer, nextCursor } = await apis.recording.getRawAudioBuffers(
-      recordingId,
-      cursor
-    );
-    if (isClosed || cursor === nextCursor) {
-      return;
-    }
-    cursor = nextCursor;
-    logger.debug('Encoding next chunk', cursor, nextCursor);
-    encoder.encode(toAudioData(buffer));
-  };
-
-  const poll = async () => {
-    if (isClosed) {
-      return;
-    }
-    logger.debug('Polling next chunk');
-    await next();
-    await new Promise(resolve => setTimeout(resolve, 1000));
-    await poll();
-  };
-
-  const close = () => {
-    if (isClosed) {
-      return;
-    }
-    isClosed = true;
-    return encoder.close();
-  };
-
-  return {
-    id: recordingId,
-    next,
-    poll,
-    flush: () => {
-      return encoder.flush();
-    },
-    close,
-    finish: async () => {
-      logger.debug('Finishing encoding');
-      await next();
-      close();
-      const buffer = muxToMp4(encodedChunks, {
-        sampleRate: codecs.sampleRate,
-        numberOfChannels: codecs.numberOfChannels,
-        bitrate: codecs.targetBitrate,
-      });
-      return buffer;
-    },
-    [Symbol.dispose]: () => {
-      close();
-    },
-  };
-};
-
-export type OpusStreamEncoder = ReturnType<typeof createStreamEncoder>;