feat(web): prototype naturalcad marketing-style website front-end

ui: add explicit DXF-focused example prompt

feat: add 1d_path mode and DXF export/download support

tune: raise worker exec/llm timeouts and cap geometry complexity

fix: raise backend timeout default and show clear timeout errors

fix: make GLB preview generation robust and use stable artifacts path

fix: fallback preview to STL when GLB is unavailable

fix: restore GLB preview generation by correcting trimesh apply_transform call

sec: default to error-only logging across worker and UI

feat: store generated code in DB by default and disable GLB storage upload

sec: hide generated CAD code in worker logs and API response by default

ui: hide generated code in logs by default via NATURALCAD_SHOW_CODE flag

sec: harden modal worker, update deployment docs, and add pre-push safety checks

fix: align Gradio–Modal JSON contract, add Pydantic validation, and upgrade LLM prompts with structured context, output-type rules, and traceback repair

NaturalCAD: Add README and requirements for cad-worker app

NaturalCAD: Revert LLM to Qwen/Qwen2.5-Coder-32B-Instruct (DeepSeek not supported on HF Inference API)

NaturalCAD: Switch to DeepSeek-Coder-V2-Lite-Instruct and refine prompt for flexible pattern use

NaturalCAD: Expand build123d knowledge base with 6 more patterns (pyramid, loft, mirror, union, diff, intersect)

NaturalCAD: CRITICAL FIX - move export inside tmpdir context (was writing to deleted dir)

NaturalCAD: Fix UUID format, file path checks

Add debug logging for file downloads

NaturalCAD: Add build123d knowledge base with 9 canonical patterns

NaturalCAD: Fix file serving - use artifacts/runs dir like local mode

NaturalCAD: Download artifacts to temp files for Gradio display (HF Spaces blocks external URLs)

NaturalCAD: Add rule #10 about extrude requiring sketch context

NaturalCAD: Add try/catch to export functions and fix supabase spec column issue

NaturalCAD: fix indentation error in export block

NaturalCAD: Add 3-attempt LLM self-healing retry loop

NaturalCAD: strengthen translate/rotate ban in prompt

NaturalCAD: fix Supabase jobs column error and put error in spec

NaturalCAD: Add extrude() rule to system prompt

NaturalCAD: clarify PolarLocations context manager syntax

NaturalCAD: Add exact syntax for PolarLocations and GridLocations to system prompt

NaturalCAD: elaborate on object.rotate() in system prompt

NaturalCAD: ban standalone rotate() in system prompt

NaturalCAD: fix fastapi Request injection

NaturalCAD: remove fastapi top level import to fix local deployment

NaturalCAD: Add API key check, env scrub before exec, and Polygon syntax fix

NaturalCAD: remove second stray pydantic import

NaturalCAD: remove pydantic dependency so modal deploy runs locally

NaturalCAD: wire up Supabase logging and fix Modal fastapi endpoint

NaturalCAD: update HF UI to connect to Modal endpoint

NaturalCAD: remove deprecated Fly.io backend api

NaturalCAD: Add LLM via HF Inference, GLB export, and update docs

NaturalCAD: call /v1/generate from HF

NaturalCAD: return code only

NaturalCAD: run locally, upload to backend

NaturalCAD: restore CAD runtime and backend polling

NaturalCAD: use local fallback during worker debugging

NaturalCAD: add render_code_from_spec stub to backend