refactor: Phase 7-2 - Inquiry page API-First (partial)

**Implementation:**
- InquiryBrowserClient: HTTP API client interface
  * GetPagedAsync(page, pageSize): Fetch inquiries
  * GetByIdAsync(id): Fetch single inquiry
  * UpdateStatusAsync(id, status): Change status

- Program.cs: Register InquiryBrowserClient
  * AddHttpClient with TokenRefreshHandler

- InquiryTable.razor: Refactored
  * Before: @inject InquiryService (direct service call)
  * After: @inject IInquiryBrowserClient (API call)
  * Status labels: Use InquiryStatusMapper
  * API calls via client instead of service

**Status:**
- Blog page: ✅ Already API-First (ApiClient)
- Inquiry table: ✅ API-First (IInquiryBrowserClient)
- Inquiry detail: ⏳ Pending (needs additional API endpoints)
  * UpdateAdminMemoAsync
  * LinkClientAsync
  * ConvertToClientAsync

**SOLID Applied:**
✓ S (Single Responsibility): InquiryBrowserClient handles only Inquiry API calls
✓ D (Dependency Inversion): Blazor depends on IInquiryBrowserClient abstraction
✓ O (Open/Closed): Client can be extended without Blazor changes

Next: Implement remaining API endpoints for InquiryDetail refactoring

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

TaxBaik.Web/Components/Admin/InquiryTable.razor

@@ -1,5 +1,5 @@
-@using TaxBaik.Application.Services
-@inject InquiryService InquiryService
+@using TaxBaik.Web.Services
+@inject IInquiryBrowserClient InquiryClient
 
 <MudSimpleTable Striped="true" Dense="true" Class="admin-table mt-4">
     <thead>
@@ -45,7 +45,7 @@
 
     protected override async Task OnInitializedAsync()
     {
-        var (items, _) = await InquiryService.GetPagedAsync(1, 100);
+        var (items, _) = await InquiryClient.GetPagedAsync(1, 100);
         inquiries = items.ToList();
         FilterInquiries();
     }
@@ -69,18 +69,14 @@
     private static Color GetStatusColor(string status) => status switch
     {
         "new" => Color.Warning,
-        "contacted" => Color.Info,
-        "completed" => Color.Success,
+        "consulting" => Color.Info,
+        "contracted" => Color.Success,
+        "rejected" => Color.Error,
+        "closed" => Color.Dark,
         _ => Color.Default
     };
 
-    private static string GetStatusLabel(string status) => status switch
-    {
-        "new" => "신규",
-        "contacted" => "연락함",
-        "completed" => "완료",
-        _ => status
-    };
+    private static string GetStatusLabel(string status) => InquiryStatusMapper.Labels.GetValueOrDefault(status, status);
 
     protected override async Task OnParametersSetAsync()
     {