Add policy authorization based on claim for admin role.

Note that this redirects to the login page, it should actually display an Access Denied message.

ServerManagement/Components/Pages/AddEditServer.razor

@@ -1,9 +1,13 @@
 @page "/server/{id:int?}"
 
+@using Microsoft.AspNetCore.Authorization
+
 @inject NavigationManager NavigationManager
 @inject IJSRuntime JSRuntime
 @inject IServersEFCoreRepository ServersEFCoreRepository
 
+@attribute [Authorize(Policy = "Administrator")]
+
 <NavigationLock
   OnBeforeInternalNavigation="OnBeforeInternalNavigation"
   ConfirmExternalNavigation="true">

ServerManagement/Components/Pages/Wizards/SetCityName.razor

@@ -1,10 +1,13 @@
 @page "/cityname"
 
+@using Microsoft.AspNetCore.Authorization
 @using ServerManagement.StateStore
 
 @inject NavigationManager NavigationManager
 @inject ContainerStorage containerStorage
 
+@attribute [Authorize]
+
 <h3>City Name</h3>
 <br/>
 

ServerManagement/Components/Pages/Wizards/SetServerName.razor

@@ -1,10 +1,13 @@
 @page "/servername"
 
+@using Microsoft.AspNetCore.Authorization
 @using ServerManagement.StateStore
 
 @inject NavigationManager NavigationManager
 @inject ContainerStorage containerStorage
 
+@attribute [Authorize]
+
 <h3>Server Name</h3>
 <br/>
 

ServerManagement/Components/Pages/Wizards/SetStatus.razor

@@ -1,11 +1,14 @@
 @page "/serverstatus"
 
+@using Microsoft.AspNetCore.Authorization
 @using ServerManagement.StateStore
 
 @inject NavigationManager NavigationManager
 @inject ContainerStorage containerStorage
 @inject IServersEFCoreRepository ServersEFCoreRepository
 
+@attribute [Authorize]
+
 <h3>Server Status</h3>
 <br/>
 

ServerManagement/Program.cs

@@ -55,6 +55,12 @@ builder.Services.AddAuthentication(options =>
     })
     .AddIdentityCookies();
 
+builder.Services.AddAuthorization(options =>
+    {
+        options.AddPolicy("Administrator", policy => policy.RequireClaim("Role", "Admin"));
+    }
+);
+
 var connectionString = builder.Configuration.GetConnectionString("ServerManagement") ?? throw new InvalidOperationException("Connection string 'ServerManagement' not found.");
 builder.Services.AddDbContext<IdentityContext>(options =>
     options.UseSqlite(connectionString));