Kann ich Midjourney vibecoden?

Build me a local image-generation studio wrapping open models, in place of
Midjourney. Requirements:

- A local web app (Node + Express, plain HTML/JS) on localhost:4890: prompt box,
  a generate-4 button, and a gallery grid of results.
- Backend targets whichever engine I have: a local ComfyUI instance running Flux
  or SDXL if there is a GPU, otherwise a hosted API like Replicate or fal.ai
  (key in .env). Same UI either way.
- Save every image to ~/ImageGen/YYYY-MM/ with a sidecar JSON: prompt, seed,
  model, steps, so any result is reproducible later.
- Gallery search over past prompts via SQLite FTS5, favorites, and one-click
  re-run with the same seed or a new variation.
- Style presets in a styles.json of prompt prefixes and suffixes I can toggle,
  a poor man's style reference.
- No accounts, no telemetry, everything stays local except the hosted-API calls.
- Out of scope: training or fine-tuning models, and matching Midjourney's look.
  Build for reproducibility and control, not a taste layer.
- README: both engine setups, the rough cost per image on the hosted route, and
  a plain note that this is not Midjourney, the proprietary model and its years
  of aesthetic tuning cannot be rebuilt, this trades that for privacy and control.

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