fix: admin inquiry creation now sends telegram notification and shows feedback

InquiryCreate.razor was passing suppressNotification: true, preventing telegram
alerts from reaching customers. Also, the success snackbar was dismissed too
quickly (immediate navigation) for users to see feedback.

Changes:
- Set suppressNotification: false so admin-created inquiries trigger telegram alerts
- Updated success message to explicitly mention notification was sent
- Added 3-second delay before redirecting, giving users time to see the feedback

User-facing improvement: admins now get clear confirmation that their inquiry
was logged and the customer was notified.

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

src/TaxBaik.Web.Client/Components/Admin/Pages/Inquiries/InquiryCreate.razor

@@ -36,7 +36,7 @@
                 Email = model.Email,
                 ServiceType = model.ServiceType,
                 Message = model.Message,
-                SuppressNotification = true
+                SuppressNotification = false
             });
 
             if (result == null)
@@ -45,7 +45,9 @@
                 return;
             }
 
-            Snackbar.Add("문의가 등록되었습니다.", Severity.Success);
+            Snackbar.Add("✅ 문의가 등록되었고 고객에게 알림이 발송되었습니다.", Severity.Success);
+            // 사용자가 성공 메시지를 볼 수 있도록 3초 후에 목록으로 이동
+            await Task.Delay(3000);
             Navigation.NavigateTo("/taxbaik/admin/inquiries");
         }
         catch (ValidationException ex)