Vale construir sua versão de Meshy?

Build a local single-user web app called "meshlab" that generates 3D meshes from a prompt or an image on my own GPU.

Stack, no substitutions:
- Python 3.11, FastAPI backend, plain HTML + vanilla JS frontend served by FastAPI
- SQLite via sqlite3 for the job table, no ORM
- three.js loaded from a CDN for the model viewer
- A single background worker thread with an in-process job queue. No Celery, no Redis.

Generation pipeline:
- Image to 3D is the primary path. Use an open-weights image-to-3D model from Hugging Face (Hunyuan3D-2 or TRELLIS, pick one and commit to it in the code and README). Load it lazily on first job and keep it resident.
- Text to 3D is a two stage path: call a local Stable Diffusion checkpoint via diffusers to make a single reference image, then feed that image into the same 3D pipeline. If no SD checkpoint is present, disable the text path in the UI with a clear message instead of failing.
- Export GLB. Also write the raw OBJ if the pipeline produces one.

UI, one page:
- Left: a text prompt box, an image upload dropzone, a "generate" button, and a seed field.
- Right: a job list with status (queued, running, done, failed), newest first, polling every 2 seconds.
- Clicking a done job loads its GLB into a three.js canvas with orbit controls, a grid floor, and one directional plus one ambient light. Add a wireframe toggle and a "download GLB" link.
- Show generation time and peak VRAM per job.

In scope: local file storage under ./outputs/{job_id}/, a jobs table, graceful failure with the traceback saved to the job row, a .env for MODEL_ID and SD_MODEL_PATH, a README that states the VRAM requirement bluntly.

Out of scope, do not build: user accounts, cloud storage, telemetry, retopology, UV unwrapping, PBR texture baking, rigging, animation, multi-GPU, payment, sharing links.

The README must include a short "limitations" section stating that output is dense triangle soup with baked vertex colors or a single texture, that it needs cleanup in Blender before engine use, and that model weight licenses must be checked before any commercial use.