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>

frontend/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "viewer3d-frontend",
+  "version": "1.0.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vue-tsc -b && vite build",
+    "preview": "vite preview",
+    "lint": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs,.ts,.tsx,.cts,.mts --fix",
+    "typecheck": "vue-tsc --noEmit"
+  },
+  "dependencies": {
+    "@types/earcut": "^3.0.0",
+    "axios": "^1.6.0",
+    "earcut": "^3.0.2",
+    "online-3d-viewer": "^0.16.0",
+    "pinia": "^2.1.0",
+    "three": "^0.160.0",
+    "three-mesh-bvh": "^0.9.3",
+    "vue": "^3.4.0"
+  },
+  "devDependencies": {
+    "@types/node": "^20.14.0",
+    "@types/three": "^0.160.0",
+    "@vitejs/plugin-vue": "^5.0.0",
+    "@vue/tsconfig": "^0.5.0",
+    "typescript": "~5.6.0",
+    "vite": "^5.0.0",
+    "vue-tsc": "^2.1.0"
+  }
+}