feat: add customer-owned frontend, device config, pricing (v1.2.0)

- Add frontend/ at root (customer's own React app, all pages)
- Add customers/tianpu/devices.json (17 devices, 375kW PV)
- Add customers/tianpu/pricing.json (Beijing TOU 4-tier)
- Add customers/tianpu/hooks/__init__.py
- Add .githooks/pre-commit to block core/ modifications
- Add CLAUDE.md, .gitignore
- Update docker-compose.override.yml frontend -> ./frontend
- Pin bcrypt==4.0.1 in requirements.txt

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/vite.config.ts

@@ -0,0 +1,29 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+export default defineConfig({
+  plugins: [react()],
+  server: {
+    port: 3000,
+    proxy: {
+      '/api': {
+        target: 'http://backend:8000',
+        changeOrigin: true,
+      },
+    },
+  },
+  // Force consistent pre-bundling of deps that have CJS/ESM interop issues
+  optimizeDeps: {
+    include: [
+      'react',
+      'react-dom',
+      'react-dom/client',
+      '@react-three/fiber',
+      '@react-three/drei',
+      '@react-three/postprocessing',
+      'three',
+    ],
+    // Ensure all deps are processed in a single pass
+    force: true,
+  },
+})