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.Application.Tests/InquiryServiceTests.cs

@@ -65,6 +65,22 @@ public class InquiryServiceTests
                 inquiry.Status = status;
             return Task.CompletedTask;
         }
+
+        public Task UpdateAdminMemoAsync(int id, string? adminMemo, CancellationToken cancellationToken = default)
+        {
+            var inquiry = Inquiries.FirstOrDefault(x => x.Id == id);
+            if (inquiry != null)
+                inquiry.AdminMemo = adminMemo;
+            return Task.CompletedTask;
+        }
+
+        public Task LinkClientAsync(int inquiryId, int clientId, CancellationToken cancellationToken = default)
+        {
+            var inquiry = Inquiries.FirstOrDefault(x => x.Id == inquiryId);
+            if (inquiry != null)
+                inquiry.ClientId = clientId;
+            return Task.CompletedTask;
+        }
     }
 
     private sealed class FakeInquiryNotificationService : IInquiryNotificationService