feat: 分离密码重置和修改密码功能

- 密码重置：用户忘记密码时通过邮箱/短信验证（需开启开关）
- 修改密码：已登录用户通过旧密码修改（固定功能，无需配置）
- 添加 EnablePasswordReset 开关控制密码重置功能
- PasswordResetMethod 只支持 email/sms 两种验证方式
- 添加短信配置管理功能
- 移除独立的应用邮箱设置页面

backend/internal/router/app/app_crypto_helper.go

@@ -42,11 +42,11 @@ func AppCryptoMiddleware() gin.HandlerFunc {
 
 		shouldEncrypt := encryptType != crypto.EncryptTypeNone
 
-		fmt.Printf("[AppCrypto] AppKey: %s, EncryptType: %s, SecretKey: %s, ShouldEncrypt: %v\n",
-			appKey, app.EncryptType, app.SecretKey, shouldEncrypt)
+		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.SecretKey))
+		c.Set("crypto_manager", crypto.NewCryptoManager(encryptType, app.EncryptKey))
 
 		c.Next()
 	}
@@ -68,7 +68,7 @@ func getAppCryptoManager(appKey string) (*crypto.CryptoManager, error) {
 		encryptType = crypto.EncryptTypeNone
 	}
 
-	return crypto.NewCryptoManager(encryptType, app.SecretKey), nil
+	return crypto.NewCryptoManager(encryptType, app.EncryptKey), nil
 }
 
 func decryptRequest(c *gin.Context, appKey string) ([]byte, error) {