feat: 添加SysNoticeHandler通知管理API

novalon-manage-api/manage-sys/src/main/java/cn/novalon/manage/sys/handler/notice/SysNoticeHandler.java

@@ -0,0 +1,63 @@
+package cn.novalon.manage.sys.handler.notice;
+
+import cn.novalon.manage.sys.core.domain.SysNotice;
+import cn.novalon.manage.sys.core.service.ISysNoticeService;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+@RestController
+@RequestMapping("/api/notices")
+public class SysNoticeHandler {
+
+    private final ISysNoticeService noticeService;
+
+    public SysNoticeHandler(ISysNoticeService noticeService) {
+        this.noticeService = noticeService;
+    }
+
+    @GetMapping
+    public Flux<SysNotice> getAllNotices() {
+        return noticeService.findAll();
+    }
+
+    @GetMapping("/{id}")
+    public Mono<ResponseEntity<SysNotice>> getNoticeById(@PathVariable Long id) {
+        return noticeService.findById(id)
+                .map(ResponseEntity::ok)
+                .defaultIfEmpty(ResponseEntity.notFound().build());
+    }
+
+    @GetMapping("/status/{status}")
+    public Flux<SysNotice> getNoticesByStatus(@PathVariable String status) {
+        return noticeService.findByStatus(status);
+    }
+
+    @PostMapping
+    public Mono<ResponseEntity<SysNotice>> createNotice(@RequestBody SysNotice notice) {
+        return noticeService.save(notice)
+                .map(n -> ResponseEntity.status(HttpStatus.CREATED).body(n));
+    }
+
+    @PutMapping("/{id}")
+    public Mono<ResponseEntity<SysNotice>> updateNotice(@PathVariable Long id, @RequestBody SysNotice notice) {
+        return noticeService.findById(id)
+                .flatMap(existing -> {
+                    existing.setNoticeTitle(notice.getNoticeTitle());
+                    existing.setNoticeType(notice.getNoticeType());
+                    existing.setNoticeContent(notice.getNoticeContent());
+                    existing.setStatus(notice.getStatus());
+                    return noticeService.save(existing);
+                })
+                .map(ResponseEntity::ok)
+                .defaultIfEmpty(ResponseEntity.notFound().build());
+    }
+
+    @DeleteMapping("/{id}")
+    public Mono<ResponseEntity<Void>> deleteNotice(@PathVariable Long id) {
+        return noticeService.deleteById(id)
+                .then(Mono.just(ResponseEntity.noContent().build()));
+    }
+}