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/BasePageModel.cs

@@ -0,0 +1,17 @@
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace SoroushAsadi.Pages;
+
+/// <summary>Base class that reads the locale cookie and exposes Locale + IsFa helpers.</summary>
+public abstract class BasePageModel : PageModel
+{
+    public string Locale { get; private set; } = "fa";
+    public bool IsFa => Locale == "fa";
+
+    public override void OnPageHandlerExecuting(Microsoft.AspNetCore.Mvc.Filters.PageHandlerExecutingContext context)
+    {
+        Locale = Request.Cookies["locale"] is "en" ? "en" : "fa";
+        ViewData["Locale"] = Locale;
+        base.OnPageHandlerExecuting(context);
+    }
+}