Summary

• add a typed upload progress model (processing, uploading, completed, failed) with bytes + fraction snapshots in FileUploader
• upgrade ApiClient.uploadFile progress callbacks to emit structured transport progress (bytesSent, totalBytes, fractionCompleted)
• preprocess videos in the upload path (compression attempt + safe fallback), and keep upload metadata aligned with the actual payload
• make video export cancellation-aware so canceling send cancels AV export immediately
• expose upload progress publishers for media local IDs and bridge legacy fraction handlers for compatibility
• wire iOS/macOS NewVideoView to upload progress so pending videos show processing/upload byte state instead of duration only
• add a non-UI plan doc for thread 1061 context and implementation scope

Tests

• cd apple/InlineKit && swift test

Scope notes

• intentionally out of scope: multipart uploads/resume-after-restart/server large-file architecture changes (stage-3 items in thread 1061)