feat: consolidate env config and add deployment files

- Add debug_font_path, demo_docs_dir, e2e_api_base_url to config.py
- Fix hardcoded paths in pp_structure_debug.py, create_demo_images.py
- Fix hardcoded paths in test files
- Update .env.example with new configuration options
- Update .gitignore to exclude AI development files (.claude/, openspec/, AGENTS.md, CLAUDE.md)
- Add production startup script (start-prod.sh)
- Add README.md with project documentation
- Add 1panel Docker deployment files (docker-compose.yml, Dockerfiles, nginx.conf)

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

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

frontend/vite.config.ts

@@ -1,23 +1,33 @@
-import { defineConfig } from 'vite'
+import { defineConfig, loadEnv } from 'vite'
 import react from '@vitejs/plugin-react'
 import path from 'path'
 
 // https://vite.dev/config/
-export default defineConfig({
-  plugins: [react()],
-  server: {
-    host: '0.0.0.0',
-    port: 5173,
-    proxy: {
-      '/api': {
-        target: process.env.VITE_API_URL || 'http://localhost:8000',
-        changeOrigin: true,
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode, process.cwd(), '')
+
+  const backendPort = env.BACKEND_PORT || '8000'
+  const backendBaseUrl = (env.VITE_API_BASE_URL || env.VITE_API_URL || `http://localhost:${backendPort}`).replace(/\/$/, '')
+
+  const frontendPort = Number.parseInt(env.FRONTEND_PORT || env.VITE_PORT || '5173', 10)
+  const frontendHost = env.FRONTEND_HOST || '0.0.0.0'
+
+  return {
+    plugins: [react()],
+    server: {
+      host: frontendHost,
+      port: Number.isFinite(frontendPort) ? frontendPort : 5173,
+      proxy: {
+        '/api': {
+          target: backendBaseUrl,
+          changeOrigin: true,
+        },
       },
     },
-  },
-  resolve: {
-    alias: {
-      '@': path.resolve(__dirname, './src'),
+    resolve: {
+      alias: {
+        '@': path.resolve(__dirname, './src'),
+      },
     },
-  },
+  }
 })