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>

Models/ContentSection.cs

@@ -0,0 +1,13 @@
+namespace SoroushAsadi.Models;
+
+/// <summary>
+/// Maps to the existing `sections` SQLite table.
+/// data column is a JSON string — either {"fa":…,"en":…} for bilingual sections,
+/// or {"slug": PostContent, …} for the "posts" key.
+/// </summary>
+public class ContentSection
+{
+    public string Key { get; set; } = "";
+    public string DataJson { get; set; } = "{}";
+    public long UpdatedAt { get; set; }
+}