비공개 메모 기능 추가 + 아이콘 개선

- 식당별 1:1 비공개 메모 CRUD (user_memos 테이블)
- 내 기록에 리뷰/메모 탭 분리
- 백오피스 유저 관리에 메모 수/상세 표시
- 리뷰/메모 작성 시 현재 날짜 기본값
- 지도우선/목록우선 버튼 Material Symbols 아이콘 적용

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/lib/api.ts

@@ -129,6 +129,17 @@ export interface Review {
   user_avatar_url: string | null;
 }
 
+export interface Memo {
+  id: string;
+  user_id: string;
+  restaurant_id: string;
+  rating: number | null;
+  memo_text: string | null;
+  visited_at: string | null;
+  created_at: string;
+  updated_at: string;
+}
+
 export interface DaemonConfig {
   scan_enabled: boolean;
   scan_interval_min: number;
@@ -256,6 +267,28 @@ export const api = {
     );
   },
 
+  // Memos
+  getMemo(restaurantId: string) {
+    return fetchApi<Memo>(`/api/restaurants/${restaurantId}/memo`);
+  },
+
+  upsertMemo(restaurantId: string, data: { rating?: number; memo_text?: string; visited_at?: string }) {
+    return fetchApi<Memo>(`/api/restaurants/${restaurantId}/memo`, {
+      method: "POST",
+      body: JSON.stringify(data),
+    });
+  },
+
+  deleteMemo(restaurantId: string) {
+    return fetchApi<void>(`/api/restaurants/${restaurantId}/memo`, {
+      method: "DELETE",
+    });
+  },
+
+  getMyMemos() {
+    return fetchApi<(Memo & { restaurant_name: string | null })[]>("/api/users/me/memos");
+  },
+
   // Stats
   recordVisit() {
     return fetchApi<{ ok: boolean }>("/api/stats/visit", { method: "POST" });
@@ -281,6 +314,7 @@ export const api = {
         created_at: string | null;
         favorite_count: number;
         review_count: number;
+        memo_count: number;
       }[];
       total: number;
     }>(`/api/admin/users${qs ? `?${qs}` : ""}`);
@@ -315,6 +349,20 @@ export const api = {
     >(`/api/admin/users/${userId}/reviews`);
   },
 
+  getAdminUserMemos(userId: string) {
+    return fetchApi<
+      {
+        id: string;
+        restaurant_id: string;
+        rating: number | null;
+        memo_text: string | null;
+        visited_at: string | null;
+        created_at: string;
+        restaurant_name: string | null;
+      }[]
+    >(`/api/admin/users/${userId}/memos`);
+  },
+
   // Admin
   addChannel(channelId: string, channelName: string, titleFilter?: string) {
     return fetchApi<{ id: string; channel_id: string }>("/api/channels", {