fix(server): 更新数据库环境变量命名以保持一致性

fix(WorkerDashboardView): 调整扫描器延迟并简化错误处理

backend/server.js

@@ -14,11 +14,11 @@ async function startServer() {
 
   // --- Database Connection ---
   const db = mysql.createPool({
-    host: process.env.DB_HOST,
-    user: process.env.DB_USER,
-    password: process.env.DB_PASSWORD,
-    database: process.env.DB_NAME,
-    port: process.env.DB_PORT || 3306,
+    host: process.env.DBHOST,
+    user: process.env.DBUSER,
+    password: process.env.DBPASSWORD,
+    database: process.env.DBNAME,
+    port: process.env.DBPORT,
     waitForConnections: true,
     connectionLimit: 10,
     queueLimit: 0,

src/views/WorkerDashboardView.vue

@@ -115,8 +115,9 @@ const startScanner = () => {
         errorMessage.value = `Unable to start camera. Try uploading an image instead.`
         isScannerActive.value = false
       })
-  }, 100)
+  }, 2000)
 }
+
 const stopScanner = () => {
   if (html5QrCode && html5QrCode.isScanning) {
     html5QrCode.stop().catch((err) => console.error('Failed to stop scanner', err))
@@ -150,9 +151,8 @@ const onScanSuccess = (decodedText) => {
       (errorMessage.value = 'Unable to retrieve your location. Please enable location services.'),
   )
 }
-const onScanFailure = (error) => {
-  errorMessage.value = error
-  isScannerActive.value = false
+const onScanFailure = () => {
+  errorMessage.value = 'Please Try Again'
 }
 </script>