a7697fd4a1
Previously each frame was stored as a separate Blob in the Recording object, causing IndexedDB to hang when writing 100+ blobs in one transaction. Now all frames are packed into a single binary blob: [4B frameCount][per frame: 4B ts, 4B len, JPEG data] DB version bumped to 2 (old store deleted on upgrade). PlaybackPanel unpacks frames on demand with a per-recording cache.