Initial commit — Hamkadr (همکادر) healthcare-staffing marketplace

ASP.NET Core 10 Razor Pages + PostgreSQL/EF Core. RTL Persian, Jalali dates, self-hosted Vazirmatn, teal/coral brand.

Features:
- Shift listings: browse/filter (city, district, role, type, pay), weekly Jalali calendar, detail + interest handoff, near-me distance sort
- Hiring (استخدام) listings with employment type + salary range
- Pattern-engine recommendations + anonymous interest tracking (visitor cookie)
- Heuristic Persian listing-parser + admin queue (raw channel post → shift/job)
- Phone-OTP cookie auth + visitor-history linking + profile

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/JobsMedical.Web/Models/District.cs

@@ -0,0 +1,22 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace JobsMedical.Web.Models;
+
+/// <summary>
+/// A neighborhood / area within a city (e.g. سعادت‌آباد، تهرانپارس). Lets people narrow a
+/// city down to where they actually want to work, alongside the "near me" distance filter.
+/// </summary>
+public class District
+{
+    public int Id { get; set; }
+
+    public int CityId { get; set; }
+    public City City { get; set; } = null!;
+
+    [Required, MaxLength(120)]
+    public string Name { get; set; } = "";
+
+    public bool IsActive { get; set; } = true;
+
+    public ICollection<Facility> Facilities { get; set; } = new List<Facility>();
+}