diff --git a/docs/task-11-pre-register-console-client.md b/docs/task-11-pre-register-console-client.md
new file mode 100644
index 0000000..d332b2f
--- /dev/null
+++ b/docs/task-11-pre-register-console-client.md
@@ -0,0 +1,69 @@
+# Task 11: Pre-register Fengling.Console as OAuth Client
+
+## Task Description
+
+**Files:**
+- Modify: `src/Fengling.AuthService/Data/SeedData.cs`
+
+## Implementation Steps
+
+### Step 1: Add Fengling.Console registration to SeedData
+
+Edit: `src/Fengling.AuthService/Data/SeedData.cs`
+
+Add after existing seed data:
+```csharp
+// Register Fengling.Console as OAuth client
+var consoleClient = await context.OAuthApplications
+    .FirstOrDefaultAsync(c => c.ClientId == "fengling-console");
+if (consoleClient == null)
+{
+    consoleClient = new OAuthApplication
+    {
+        ClientId = "fengling-console",
+        ClientSecret = "console-secret-change-in-production",
+        DisplayName = "Fengling 运管中心",
+        RedirectUris = new[] { "http://console.fengling.local/auth/callback" },
+        PostLogoutRedirectUris = new[] { "http://console.fengling.local/" },
+        Scopes = new[] { "api", "offline_access" },
+        GrantTypes = new[] { "authorization_code", "refresh_token" },
+        ClientType = "confidential",
+        ConsentType = "implicit",
+        Status = "active",
+        CreatedAt = DateTime.UtcNow
+    };
+    context.OAuthApplications.Add(consoleClient);
+    await context.SaveChangesAsync();
+}
+```
+
+### Step 2: Commit
+
+```bash
+git add src/Fengling.AuthService/Data/SeedData.cs
+git commit -m "feat(auth): pre-register Fengling.Console as OAuth client"
+```
+
+## Context
+
+This task pre-registers Fengling.Console as an OAuth client in the seed data. This allows the console to use OAuth2 authorization code flow for authentication.
+
+**OAuth Client Configuration:**
+- ClientId: `fengling-console`
+- Redirect URI: `http://console.fengling.local/auth/callback`
+- Scopes: `api`, `offline_access`
+- Grant Types: `authorization_code`, `refresh_token`
+
+## Verification
+
+- [ ] Fengling.Console client added to seed data
+- [ ] Client configured with correct redirect URIs
+- [ ] Client has required scopes and grant types
+- [ ] Build succeeds
+- [ ] Committed to git
+
+## Notes
+
+- Client secret should be changed in production
+- Redirect URI matches Fengling.Console domain
+- Client will be created on first application startup
diff --git a/src/Fengling.AuthService/Data/SeedData.cs b/src/Fengling.AuthService/Data/SeedData.cs
index 872e167..cd659a2 100644
--- a/src/Fengling.AuthService/Data/SeedData.cs
+++ b/src/Fengling.AuthService/Data/SeedData.cs
@@ -77,5 +77,27 @@ public static class SeedData
                 await userManager.AddToRoleAsync(testUser, "User");
             }
         }
+
+        var consoleClient = await context.OAuthApplications
+            .FirstOrDefaultAsync(c => c.ClientId == "fengling-console");
+        if (consoleClient == null)
+        {
+            consoleClient = new OAuthApplication
+            {
+                ClientId = "fengling-console",
+                ClientSecret = "console-secret-change-in-production",
+                DisplayName = "Fengling 运管中心",
+                RedirectUris = new[] { "http://console.fengling.local/auth/callback" },
+                PostLogoutRedirectUris = new[] { "http://console.fengling.local/" },
+                Scopes = new[] { "api", "offline_access" },
+                GrantTypes = new[] { "authorization_code", "refresh_token" },
+                ClientType = "confidential",
+                ConsentType = "implicit",
+                Status = "active",
+                CreatedAt = DateTime.UtcNow
+            };
+            context.OAuthApplications.Add(consoleClient);
+            await context.SaveChangesAsync();
+        }
     }
 }
diff --git a/src/Fengling.AuthService/bin/Debug/net10.0/Fengling.AuthService.dll b/src/Fengling.AuthService/bin/Debug/net10.0/Fengling.AuthService.dll
index 1a5071f..9f76a02 100644
Binary files a/src/Fengling.AuthService/bin/Debug/net10.0/Fengling.AuthService.dll and b/src/Fengling.AuthService/bin/Debug/net10.0/Fengling.AuthService.dll differ
diff --git a/src/Fengling.AuthService/bin/Debug/net10.0/Fengling.AuthService.pdb b/src/Fengling.AuthService/bin/Debug/net10.0/Fengling.AuthService.pdb
index 8edf5aa..2cbbe21 100644
Binary files a/src/Fengling.AuthService/bin/Debug/net10.0/Fengling.AuthService.pdb and b/src/Fengling.AuthService/bin/Debug/net10.0/Fengling.AuthService.pdb differ
diff --git a/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.AssemblyInfo.cs b/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.AssemblyInfo.cs
index b47ca8e..c8d95ba 100644
--- a/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.AssemblyInfo.cs
+++ b/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.AssemblyInfo.cs
@@ -13,7 +13,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("Fengling.AuthService")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+d3810f5d43139224571e9558a8f9d1caf253a2af")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+5cdcba7e57f11cbe819ef947fe4f31dfa3f31ce5")]
 [assembly: System.Reflection.AssemblyProductAttribute("Fengling.AuthService")]
 [assembly: System.Reflection.AssemblyTitleAttribute("Fengling.AuthService")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
diff --git a/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.AssemblyInfoInputs.cache b/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.AssemblyInfoInputs.cache
index 147ce5a..e9c4cb4 100644
--- a/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.AssemblyInfoInputs.cache
+++ b/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.AssemblyInfoInputs.cache
@@ -1 +1 @@
-6eb848986322eda4a24415ea7940bb6189775a7373c0cc69971ba237cf3fdeb1
+88557c3b57a3995d38feba9efb65b2d453135485aca705ead19cfd3379fa5af3
diff --git a/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.csproj.CoreCompileInputs.cache b/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.csproj.CoreCompileInputs.cache
index 151e12e..56dccfc 100644
--- a/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.csproj.CoreCompileInputs.cache
+++ b/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.csproj.CoreCompileInputs.cache
@@ -1 +1 @@
-246db42ea15f5b11045c9c9e1cfc0e315b80d78a560048b99d9119120a177411
+a442fae7d5599fed904d1202772e57ff3d3723e8af039346ca13fe6adc50709d
diff --git a/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.dll b/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.dll
index 1a5071f..9f76a02 100644
Binary files a/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.dll and b/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.dll differ
diff --git a/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.pdb b/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.pdb
index 8edf5aa..2cbbe21 100644
Binary files a/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.pdb and b/src/Fengling.AuthService/obj/Debug/net10.0/Fengling.AuthService.pdb differ
diff --git a/src/Fengling.AuthService/obj/Debug/net10.0/ref/Fengling.AuthService.dll b/src/Fengling.AuthService/obj/Debug/net10.0/ref/Fengling.AuthService.dll
index 00770eb..d75cd12 100644
Binary files a/src/Fengling.AuthService/obj/Debug/net10.0/ref/Fengling.AuthService.dll and b/src/Fengling.AuthService/obj/Debug/net10.0/ref/Fengling.AuthService.dll differ
diff --git a/src/Fengling.AuthService/obj/Debug/net10.0/refint/Fengling.AuthService.dll b/src/Fengling.AuthService/obj/Debug/net10.0/refint/Fengling.AuthService.dll
index 00770eb..d75cd12 100644
Binary files a/src/Fengling.AuthService/obj/Debug/net10.0/refint/Fengling.AuthService.dll and b/src/Fengling.AuthService/obj/Debug/net10.0/refint/Fengling.AuthService.dll differ
diff --git a/src/Fengling.AuthService/obj/Debug/net10.0/rjsmcshtml.dswa.cache.json b/src/Fengling.AuthService/obj/Debug/net10.0/rjsmcshtml.dswa.cache.json
index 9c97f14..eba4df2 100644
--- a/src/Fengling.AuthService/obj/Debug/net10.0/rjsmcshtml.dswa.cache.json
+++ b/src/Fengling.AuthService/obj/Debug/net10.0/rjsmcshtml.dswa.cache.json
@@ -1 +1 @@
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diff --git a/src/Fengling.AuthService/obj/Debug/net10.0/rjsmrazor.dswa.cache.json b/src/Fengling.AuthService/obj/Debug/net10.0/rjsmrazor.dswa.cache.json
index 8bef78b..657ca0a 100644
--- a/src/Fengling.AuthService/obj/Debug/net10.0/rjsmrazor.dswa.cache.json
+++ b/src/Fengling.AuthService/obj/Debug/net10.0/rjsmrazor.dswa.cache.json
@@ -1 +1 @@
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