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/Login.cshtml

@@ -0,0 +1,29 @@
+@page "/Admin/Login"
+@model SoroushAsadi.Pages.Admin.LoginModel
+@{
+    Layout = "_AdminLayout";
+    ViewData["Title"] = "Sign in";
+}
+
+<div class="flex min-h-[60vh] items-center justify-center">
+  <div class="w-full max-w-sm">
+    <div class="mb-8 text-center">
+      <img src="/logo-mark.svg" alt="" width="40" height="40" class="mx-auto mb-4" />
+      <h1 class="font-display text-2xl font-bold text-white">Admin sign in</h1>
+    </div>
+
+    @if (!string.IsNullOrEmpty(Model.Error))
+    {
+      <div class="mb-4 rounded-lg border border-red-500/30 bg-red-500/10 px-4 py-3 text-sm text-red-400">@Model.Error</div>
+    }
+
+    <form method="post" class="glass p-6 space-y-4">
+      <div>
+        <label class="label-mono mb-2 block" for="password">Password</label>
+        <input id="password" name="password" type="password" required autofocus
+               class="w-full rounded-xl border border-white/10 bg-white/[.03] px-4 py-3 text-sm text-white outline-none focus:border-electric/60 transition-colors" />
+      </div>
+      <button type="submit" class="btn-primary w-full justify-center">Sign in</button>
+    </form>
+  </div>
+</div>