Initial commit: 3D Viewer application

Features:
- Vue 3 frontend with Three.js/Online3DViewer
- Node.js API with PostgreSQL and Redis
- Python worker for model conversion
- Docker Compose for deployment
- ViewCube navigation with drag rotation and 90° snap
- Cross-section, exploded view, and render settings
- Parts tree with visibility controls

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,52 @@
+# Dependencies
+node_modules/
+.pnpm-store/
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# Build outputs
+dist/
+build/
+*.tsbuildinfo
+
+# IDE and editor
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+.venv/
+venv/
+.Python
+*.egg-info/
+
+# Claude Code
+.claude/
+
+# Docker volumes (local data)
+postgres_data/
+redis_data/
+minio_data/
+
+# Testing
+coverage/
+.nyc_output/
+
+# Misc
+*.tmp
+*.temp
+.cache/