Rewrite: Next.js → ASP.NET Core 10 Razor Pages

Full rewrite of the portfolio site from Next.js 14 to .NET 10:

- ASP.NET Core 10 Razor Pages, no Node.js dependency
- EF Core 10 + SQLite (same schema as before — data survives upgrade)
- Cookie authentication (same single-password model)
- Resend contact form via HttpClient
- Bilingual FA/EN via locale cookie + BasePageModel
- All UI ported to Razor Pages with Tailwind CDN + custom CSS
- Vanilla JS: particles, typewriter, cursor, animations, portfolio modal
- Dockerfile: SDK 10.0-alpine → aspnet 10.0-alpine (no npm/Node needed)
- CI/CD: dropped NPM_TOKEN, ADMIN_SESSION_SECRET — pure dotnet publish

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

Pages/Admin/Posts/Index.cshtml.cs

@@ -0,0 +1,13 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using SoroushAsadi.Services;
+
+namespace SoroushAsadi.Pages.Admin.Posts;
+
+[Authorize]
+public class PostsIndexModel(ContentService content) : PageModel
+{
+    public IReadOnlySet<string> OverrideSlugs { get; private set; } = new HashSet<string>();
+
+    public void OnGet() => OverrideSlugs = content.GetPostOverrides().Keys.ToHashSet();
+}