Fix admin client and auth flows

src/TaxBaik.Web.Client/Services/CustomAuthenticationStateProvider.cs

@@ -153,7 +153,6 @@ public class CustomAuthenticationStateProvider : AuthenticationStateProvider
     {
         // TokenStore 초기화
         _tokenStore.Clear();
-
         NotifyAuthenticationStateChanged(GetAuthenticationStateAsync());
     }
 

src/TaxBaik.Web.Client/Services/ILocalStorageService.cs

@@ -5,4 +5,5 @@ public interface ILocalStorageService
     Task<string?> GetItemAsStringAsync(string key);
     Task SetItemAsStringAsync(string key, string value);
     Task RemoveItemAsync(string key);
+    Task ClearAuthAsync();
 }

src/TaxBaik.Web.Client/Services/LocalStorageService.cs

@@ -15,7 +15,7 @@ public class LocalStorageService : ILocalStorageService
     {
         try
         {
-            return await _jsRuntime.InvokeAsync<string>("localStorage.getItem", key);
+            return await _jsRuntime.InvokeAsync<string>("taxbaikAdminSession.getLocalStorageItem", key);
         }
         catch
         {
@@ -27,7 +27,7 @@ public class LocalStorageService : ILocalStorageService
     {
         try
         {
-            await _jsRuntime.InvokeVoidAsync("localStorage.setItem", key, value);
+            await _jsRuntime.InvokeVoidAsync("taxbaikAdminSession.setLocalStorageItem", key, value);
         }
         catch { }
     }
@@ -36,7 +36,20 @@ public class LocalStorageService : ILocalStorageService
     {
         try
         {
-            await _jsRuntime.InvokeVoidAsync("localStorage.removeItem", key);
+            await _jsRuntime.InvokeVoidAsync("taxbaikAdminSession.removeLocalStorageItem", key);
+        }
+        catch { }
+    }
+
+    public async Task ClearAuthAsync()
+    {
+        try
+        {
+            await RemoveItemAsync("accessToken");
+            await RemoveItemAsync("refreshToken");
+            await RemoveItemAsync("tokenExpiry");
+            await RemoveItemAsync("auth_token");
+            await RemoveItemAsync("admin-remembered-username");
         }
         catch { }
     }