feat(system): 实现注册码功能并优化用户注册流程

- 新增注册码生成和验证功能- 实现系统设置管理，包括注册功能开关
- 更新前端界面，增加系统管理和注册码相关功能
- 修改数据库结构，添加系统设置和注册码表

biji-houdaun/src/main/java/com/test/bijihoudaun/controller/SystemController.java

@@ -0,0 +1,50 @@
+package com.test.bijihoudaun.controller;
+
+import com.test.bijihoudaun.common.response.R;
+import com.test.bijihoudaun.service.RegistrationCodeService;
+import com.test.bijihoudaun.service.SystemSettingService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.access.prepost.PreAuthorize;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.Collections;
+
+@RestController
+@RequestMapping("/system")
+@Tag(name = "系统管理")
+public class SystemController {
+
+    @Autowired
+    private SystemSettingService systemSettingService;
+
+    @Autowired
+    private RegistrationCodeService registrationCodeService;
+
+    @GetMapping("/registration/status")
+    @Operation(summary = "获取注册功能状态")
+    public R<Boolean> isRegistrationEnabled() {
+        return R.success(systemSettingService.isRegistrationEnabled());
+    }
+
+    @PostMapping("/registration/toggle")
+    @PreAuthorize("isAuthenticated()")
+    @Operation(summary = "切换注册功能状态")
+    public R<Void> toggleRegistration(@RequestBody Boolean enabled) {
+        systemSettingService.setRegistrationEnabled(enabled);
+        return R.success();
+    }
+
+    @PostMapping("/registration/generate-code")
+    @PreAuthorize("isAuthenticated()")
+    @Operation(summary = "生成注册码")
+    public R<String> generateRegistrationCode() {
+        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+        String currentUserName = authentication.getName();
+        String code = registrationCodeService.generateCode(currentUserName);
+        return R.success(code);
+    }
+}

biji-houdaun/src/main/java/com/test/bijihoudaun/controller/UserController.java

@@ -2,6 +2,8 @@ package com.test.bijihoudaun.controller;
 
 import com.test.bijihoudaun.common.response.R;
 import com.test.bijihoudaun.entity.User;
+import com.test.bijihoudaun.service.RegistrationCodeService;
+import com.test.bijihoudaun.service.SystemSettingService;
 import com.test.bijihoudaun.service.UserService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
@@ -24,14 +26,27 @@ public class UserController {
     @Autowired
     private UserService userService;
 
+    @Autowired
+    private SystemSettingService systemSettingService;
+
+    @Autowired
+    private RegistrationCodeService registrationCodeService;
+
     @Operation(summary = "用户注册")
     @Parameters({
             @Parameter(name = "username", description = "用户名",required = true),
             @Parameter(name = "password", description = "密码",required = true),
-            @Parameter(name = "email", description = "邮箱",required = true)
+            @Parameter(name = "email", description = "邮箱",required = true),
+            @Parameter(name = "registrationCode", description = "注册码", required = true)
     })
     @PostMapping("/register")
-    public R<User> register(String username, String password, String email){
+    public R<User> register(String username, String password, String email, String registrationCode){
+        if (!systemSettingService.isRegistrationEnabled()) {
+            return R.fail("注册功能已关闭");
+        }
+        if (!registrationCodeService.validateCode(registrationCode)) {
+            return R.fail("无效或已过期的注册码");
+        }
         return R.success(userService.register(username,password,email));
     }