feat: add whether to enable self registration toggle (#760)

* refactor(frontend): extract RegistrationDisabled as reusable component
- Create RegistrationDisabled component with i18n support
- Add registrationClosed and registrationClosedMessage translations
- Replace inline JSX in App.tsx with new component
- Improve code maintainability and reusability
- Add hover effect to back button for better UX
* fix(frontend): add registration toggle to LoginModal component
- Add useSystemConfig hook to LoginModal
- Conditionally render registration button based on registration_enabled config
- Ensures consistency with HeaderBar and LoginPage registration controls
- Completes registration toggle feature implementation across all entry points
* feat(frontend): add registration toggle UI support
- Add registration disabled page in App.tsx when registration is closed
- Hide registration link in LoginPage when registration is disabled
- Add registration_enabled field to SystemConfig interface
- Frontend conditionally shows/hides registration UI based on backend config
* feat: add registration toggle feature
Add system-level registration enable/disable control:
- Add registration_enabled config to system_config table (default: true)
- Add registration check in handleRegister API endpoint
- Expose registration_enabled status in /api/config endpoint
- Frontend can use this config to conditionally show/hide registration UI
This allows administrators to control user registration without code changes.
* fix(frontend): add registration toggle to HeaderBar and RegisterPage
- Add useSystemConfig hook and registrationEnabled check to HeaderBar
- Conditionally show/hide signup buttons in both desktop and mobile views
- Add registration check to RegisterPage to show RegistrationDisabled component
- This completes the registration toggle feature across all UI components
* test(frontend): add comprehensive unit tests for registration toggle feature
- Add RegistrationDisabled component tests (rendering, navigation, styling)
- Add registrationToggle logic tests (config handling, edge cases, multi-location consistency)
- Configure Vitest with jsdom environment for React component testing
- All 80 tests passing (9 new tests for RegistrationDisabled + 21 for toggle logic)

api/server.go

@@ -197,11 +197,18 @@ func (s *Server) handleGetSystemConfig(c *gin.Context) {
 	betaModeStr, _ := s.database.GetSystemConfig("beta_mode")
 	betaMode := betaModeStr == "true"
 
+	regEnabledStr, err := s.database.GetSystemConfig("registration_enabled")
+	registrationEnabled := true
+	if err == nil {
+		registrationEnabled = strings.ToLower(regEnabledStr) != "false"
+	}
+
 	c.JSON(http.StatusOK, gin.H{
-		"beta_mode":        betaMode,
-		"default_coins":    defaultCoins,
-		"btc_eth_leverage": btcEthLeverage,
-		"altcoin_leverage": altcoinLeverage,
+		"beta_mode":            betaMode,
+		"default_coins":        defaultCoins,
+		"btc_eth_leverage":     btcEthLeverage,
+		"altcoin_leverage":     altcoinLeverage,
+		"registration_enabled": registrationEnabled,
 	})
 }
 
@@ -1704,6 +1711,14 @@ func (s *Server) handleLogout(c *gin.Context) {
 
 // handleRegister 处理用户注册请求
 func (s *Server) handleRegister(c *gin.Context) {
+	regEnabled := true
+	if regStr, err := s.database.GetSystemConfig("registration_enabled"); err == nil {
+		regEnabled = strings.ToLower(regStr) != "false"
+	}
+	if !regEnabled {
+		c.JSON(http.StatusForbidden, gin.H{"error": "注册已关闭"})
+		return
+	}
 
 	var req struct {
 		Email    string `json:"email" binding:"required,email"`