Kann ich Descript vibecoden?

Build me a text-based clip cutter to replace Descript for simple edits. Requirements:

- A local web app: Node + Express with a plain JS frontend, binds to localhost.
- I drop an audio/video file into ./media/; the app transcribes it with whisperX
  for word-level timestamps, or the OpenAI Whisper API if a key is in .env.
- The transcript renders as clickable words. I select and delete words or whole
  sentences; deleted spans go into a cut list I can undo from.
- Render: build one ffmpeg trim/concat command that removes the cut spans from
  the original and writes ./output/<name>-cut.mp4 (or .mp3 for audio-only).
- Pad each cut by about 80 ms so words are not clipped mid-syllable.
- Save each project as JSON next to the media file (transcript + cut list) so an
  edit can be reopened later.
- No accounts, no telemetry; everything stays on my machine except the optional
  Whisper API call.
- Out of scope: multitrack timeline, overdub or AI voices, filler-word
  auto-removal, cloud anything. This is a cutter, not an editor.
- README: installing ffmpeg and whisperX, and a warning that local
  transcription of long video is slow on CPU.

Antworte mir auf Deutsch. Oberfläche, Kommentare und README auf Deutsch, alle Bezeichner wie Tabellen, Spalten, Variablen, Routen und Dateinamen bleiben Englisch.