feat: CRM Phase 1-2 완성 + 시즌 시뮬레이터 + 개인정보처리방침/이용약관

- WBS-CRM-02: 상담 이력 (consultations 테이블 V008, ClientDetail.razor)
- WBS-CRM-03: 문의→고객 전환 (V009 client_id FK, InquiryDetail 고객등록 버튼)
- WBS-CRM-04: 신고 일정 캘린더 (tax_filings 테이블 V010, TaxFilingList.razor)
- WBS-CRM-05: 문의 상태 5단계 확장 (V011, InquiryStatus enum, InquiryList 탭)
- WBS-MKT-04: 시즌 시뮬레이터 어드민 페이지 (SeasonSimulator.razor)
- WBS-UX-04: 개인정보처리방침 /taxbaik/privacy, 이용약관 /taxbaik/terms
- Dashboard.razor 마감 임박 신고 위젯 추가

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

TaxBaik.Infrastructure/Repositories/InquiryRepository.cs

@@ -20,7 +20,9 @@ public class InquiryRepository(IDbConnectionFactory connectionFactory) : BaseRep
     {
         using var conn = Conn();
         return await conn.QueryFirstOrDefaultAsync<Inquiry>(
-            "SELECT id, name, phone, email, service_type, message, status, ip_address, created_at FROM inquiries WHERE id = @Id",
+            @"SELECT id, name, phone, email, service_type, message, status, ip_address,
+                     client_id, admin_memo, created_at, updated_at
+              FROM inquiries WHERE id = @Id",
             new { Id = id });
     }
 
@@ -31,7 +33,8 @@ public class InquiryRepository(IDbConnectionFactory connectionFactory) : BaseRep
         var offset = (page - 1) * pageSize;
 
         using var reader = await conn.QueryMultipleAsync(
-            @"SELECT id, name, phone, email, service_type, message, status, ip_address, created_at
+            @"SELECT id, name, phone, email, service_type, message, status, ip_address,
+                     client_id, admin_memo, created_at, updated_at
               FROM inquiries
               WHERE @Status::text IS NULL OR status = @Status
               ORDER BY created_at DESC
@@ -74,6 +77,24 @@ public class InquiryRepository(IDbConnectionFactory connectionFactory) : BaseRep
     public async Task UpdateStatusAsync(int id, string status, CancellationToken cancellationToken = default)
     {
         using var conn = Conn();
-        await conn.ExecuteAsync("UPDATE inquiries SET status = @Status WHERE id = @Id", new { Id = id, Status = status });
+        await conn.ExecuteAsync(
+            "UPDATE inquiries SET status = @Status, updated_at = NOW() WHERE id = @Id",
+            new { Id = id, Status = status });
+    }
+
+    public async Task UpdateAdminMemoAsync(int id, string? adminMemo, CancellationToken cancellationToken = default)
+    {
+        using var conn = Conn();
+        await conn.ExecuteAsync(
+            "UPDATE inquiries SET admin_memo = @AdminMemo, updated_at = NOW() WHERE id = @Id",
+            new { Id = id, AdminMemo = adminMemo });
+    }
+
+    public async Task LinkClientAsync(int inquiryId, int clientId, CancellationToken cancellationToken = default)
+    {
+        using var conn = Conn();
+        await conn.ExecuteAsync(
+            "UPDATE inquiries SET client_id = @ClientId, updated_at = NOW() WHERE id = @Id",
+            new { Id = inquiryId, ClientId = clientId });
     }
 }