오늘 이슈(TodayIssue) 기능 구현

- TodayIssue 모델 및 마이그레이션 추가
- TodayIssueController, TodayIssueService 구현
- TodayIssueObserverService 및 Observer 패턴 적용
- DailyReportService 연동
- Swagger API 문서 업데이트
- 라우트 추가

app/Http/Controllers/Api/V1/TodayIssueController.php

@@ -2,8 +2,8 @@
 
 namespace App\Http\Controllers\Api\V1;
 
-use App\Http\Controllers\Controller;
 use App\Helpers\ApiResponse;
+use App\Http\Controllers\Controller;
 use App\Services\TodayIssueService;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
@@ -25,4 +25,53 @@ public function summary(Request $request): JsonResponse
             return $this->todayIssueService->summary($limit);
         }, __('message.fetched'));
     }
-}
+
+    /**
+     * 읽지 않은 이슈 목록 조회 (헤더 알림용)
+     */
+    public function unread(Request $request): JsonResponse
+    {
+        $limit = (int) $request->input('limit', 10);
+
+        return ApiResponse::handle(function () use ($limit) {
+            return $this->todayIssueService->getUnreadList($limit);
+        }, __('message.fetched'));
+    }
+
+    /**
+     * 읽지 않은 이슈 개수 조회 (헤더 알림 뱃지용)
+     */
+    public function unreadCount(): JsonResponse
+    {
+        return ApiResponse::handle(function () {
+            return ['count' => $this->todayIssueService->getUnreadCount()];
+        }, __('message.fetched'));
+    }
+
+    /**
+     * 이슈 읽음 처리
+     */
+    public function markAsRead(int $id): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id) {
+            $result = $this->todayIssueService->markAsRead($id);
+            if (! $result) {
+                throw new \App\Exceptions\ApiException(__('error.not_found'), 404);
+            }
+
+            return null;
+        }, __('message.today_issue.marked_as_read'));
+    }
+
+    /**
+     * 모든 이슈 읽음 처리
+     */
+    public function markAllAsRead(): JsonResponse
+    {
+        return ApiResponse::handle(function () {
+            $count = $this->todayIssueService->markAllAsRead();
+
+            return ['count' => $count];
+        }, __('message.today_issue.all_marked_as_read'));
+    }
+}