feat: 主题切换 + 浅色模式适配，SFTP/批量命令/Webhook/仪表盘全面升级

backend/src/main/java/com/sshmanager/controller/WebhookController.java

@@ -0,0 +1,59 @@
+package com.sshmanager.controller;
+
+import com.sshmanager.entity.User;
+import com.sshmanager.entity.WebhookConfig;
+import com.sshmanager.repository.UserRepository;
+import com.sshmanager.service.WebhookService;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.Authentication;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/api/webhooks")
+public class WebhookController {
+
+    private final WebhookService webhookService;
+    private final UserRepository userRepository;
+
+    public WebhookController(WebhookService webhookService, UserRepository userRepository) {
+        this.webhookService = webhookService;
+        this.userRepository = userRepository;
+    }
+
+    private Long getCurrentUserId(Authentication auth) {
+        User user = userRepository.findByUsername(auth.getName())
+            .orElseThrow(() -> new IllegalStateException("User not found"));
+        return user.getId();
+    }
+
+    @GetMapping
+    public ResponseEntity<List<WebhookConfig>> list(Authentication auth) {
+        return ResponseEntity.ok(webhookService.listByUser(getCurrentUserId(auth)));
+    }
+
+    @PostMapping
+    public ResponseEntity<WebhookConfig> create(@RequestBody Map<String, String> body, Authentication auth) {
+        return ResponseEntity.ok(webhookService.create(
+            getCurrentUserId(auth), body.get("url"), body.get("eventType")));
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Map<String, String>> delete(@PathVariable Long id, Authentication auth) {
+        webhookService.delete(id, getCurrentUserId(auth));
+        Map<String, String> result = new HashMap<>();
+        result.put("message", "Deleted");
+        return ResponseEntity.ok(result);
+    }
+
+    @PostMapping("/test")
+    public ResponseEntity<Map<String, String>> test(@RequestBody Map<String, String> body) {
+        webhookService.fireEvent("test", "测试通知", body.getOrDefault("message", "这是一条测试消息"));
+        Map<String, String> result = new HashMap<>();
+        result.put("message", "Test event fired");
+        return ResponseEntity.ok(result);
+    }
+}