fix: JWT密钥同步、地图初始化时序、API中间件错误处理

- 修复安装完成后JWT密钥未同步到viper内存的问题
- 修复地图在loading状态时DOM元素不存在导致的初始化错误
- 修复AppCryptoMiddleware中数据库错误时未正确返回错误响应的问题
- 添加数据库未初始化检查
- 移除调试日志输出

backend/internal/router/app/app_crypto_helper.go

@@ -1,7 +1,6 @@
 package app
 
 import (
-	"fmt"
 	"verification-platform-backend/internal/database"
 	"verification-platform-backend/internal/model"
 	"verification-platform-backend/pkg/crypto"
@@ -11,25 +10,26 @@ import (
 
 func AppCryptoMiddleware() gin.HandlerFunc {
 	return func(c *gin.Context) {
-		fmt.Printf("[AppCrypto] Middleware called\n")
 		appKey := c.Param("appKey")
-		fmt.Printf("[AppCrypto] AppKey from param: %s\n", appKey)
 
 		if appKey == "" {
-			fmt.Printf("[AppCrypto] AppKey is empty, skipping\n")
 			c.Next()
 			return
 		}
 
+		if database.DB == nil {
+			c.JSON(500, gin.H{"code": 500, "message": "数据库未初始化"})
+			c.Abort()
+			return
+		}
+
 		var app model.Application
 		if err := database.DB.Where("app_key = ?", appKey).First(&app).Error; err != nil {
-			fmt.Printf("[AppCrypto] Database error: %v\n", err)
-			c.Next()
+			c.JSON(404, gin.H{"code": 404, "message": "应用不存在"})
+			c.Abort()
 			return
 		}
 
-		fmt.Printf("[AppCrypto] App found: %+v\n", app)
-
 		var encryptType crypto.EncryptType
 		switch app.EncryptType {
 		case "aes":
@@ -42,11 +42,9 @@ func AppCryptoMiddleware() gin.HandlerFunc {
 
 		shouldEncrypt := encryptType != crypto.EncryptTypeNone
 
-		fmt.Printf("[AppCrypto] AppKey: %s, EncryptType: %s, EncryptKey: %s, ShouldEncrypt: %v\n",
-			appKey, app.EncryptType, app.EncryptKey, shouldEncrypt)
-
 		c.Set("should_encrypt_response", shouldEncrypt)
 		c.Set("crypto_manager", crypto.NewCryptoManager(encryptType, app.EncryptKey))
+		c.Set("app", &app)
 
 		c.Next()
 	}