fix: 오늘의 이슈 뱃지 타입 source_type 기반 매핑

- TodayIssue 모델에 SOURCE_TO_BADGE 매핑 상수 추가
- TodayIssueService에서 source_type 기반 badge 매핑 적용
- 입금/출금 소스 타입 및 뱃지 상수 추가

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/Services/TodayIssueService.php

@@ -44,9 +44,12 @@ public function summary(int $limit = 30, ?string $badge = null): array
         $issues = $query->limit($limit)->get();
 
         $items = $issues->map(function (TodayIssue $issue) {
+            // source_type 기반으로 badge 매핑 (DB 값보다 우선)
+            $badge = TodayIssue::SOURCE_TO_BADGE[$issue->source_type] ?? $issue->badge ?? '기타';
+
             return [
                 'id' => $issue->source_type.'_'.$issue->source_id,
-                'badge' => $issue->badge,
+                'badge' => $badge,
                 'content' => $issue->content,
                 'time' => $this->formatRelativeTime($issue->created_at),
                 'date' => $issue->created_at?->toDateString(),
@@ -85,9 +88,12 @@ public function getUnreadList(int $limit = 10): array
             ->count();
 
         $items = $issues->map(function (TodayIssue $issue) {
+            // source_type 기반으로 badge 매핑 (DB 값보다 우선)
+            $badge = TodayIssue::SOURCE_TO_BADGE[$issue->source_type] ?? $issue->badge ?? '기타';
+
             return [
                 'id' => $issue->id,
-                'badge' => $issue->badge,
+                'badge' => $badge,
                 'notification_type' => $issue->notification_type,
                 'content' => $issue->content,
                 'path' => $issue->path,