build: 打通 FastAPI 与 Vue 最小工程、依赖与数据库连接

后端入口、配置、Redis 与 Alembic 迁移就位；前端 Vite 工程可安装可构建。

frontend/scripts/build-widget-dev.ts

@@ -0,0 +1,67 @@
+import { build } from 'vite'
+import { resolve } from 'path'
+import * as fs from 'fs'
+import * as path from 'path'
+import * as dotenv from 'dotenv'
+
+// Load development environment variables
+dotenv.config({ path: '.env.dev' })
+
+const config = resolve(process.cwd(), 'vite.widget.config.ts')
+const assetsDir = resolve(process.cwd(), '../backend/assets')
+const filesToKeep = ['widget.js', 'widget.css']
+
+async function buildWidgetDev() {
+  try {
+    console.log('Building widget with development configuration...')
+    
+    // Set NODE_ENV to development for the build
+    process.env.NODE_ENV = 'development'
+    
+    // Run the Vite build
+    await build({ configFile: config })
+    console.log('Vite build completed')
+
+    // Copy CSS file from unused directory to the root assets directory
+    const unusedDir = path.join(assetsDir, 'unused')
+    if (fs.existsSync(unusedDir)) {
+      const files = fs.readdirSync(unusedDir)
+      const cssFile = files.find(file => file.endsWith('.css'))
+      
+      if (cssFile) {
+        const sourcePath = path.join(unusedDir, cssFile)
+        const destPath = path.join(assetsDir, 'widget.css')
+        
+        fs.copyFileSync(sourcePath, destPath)
+        console.log(`Copied CSS file to ${destPath}`)
+      }
+      
+      // Clean up unused directory
+      fs.rmSync(unusedDir, { recursive: true, force: true })
+      console.log('Cleaned up unused directory')
+    }
+
+    // Clean up the assets directory - keep only widget.js and widget.css
+    const entries = fs.readdirSync(assetsDir)
+    
+    for (const entry of entries) {
+      if (!filesToKeep.includes(entry)) {
+        const entryPath = path.join(assetsDir, entry)
+        
+        if (fs.statSync(entryPath).isDirectory()) {
+          fs.rmSync(entryPath, { recursive: true, force: true })
+        } else {
+          fs.unlinkSync(entryPath)
+        }
+      }
+    }
+    
+    console.log(`Cleaned up assets directory, keeping only: ${filesToKeep.join(', ')}`)
+    console.log('Development widget built successfully!')
+  } catch (error) {
+    console.error('Development build failed:', error)
+    process.exit(1)
+  }
+}
+
+buildWidgetDev()