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/JobOpening.cs

@@ -0,0 +1,45 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace JobsMedical.Web.Models;
+
+/// <summary>
+/// A permanent / ongoing hiring position (استخدام) — the hiring side of the marketplace,
+/// alongside one-off <see cref="Shift"/>s. No date/time; instead an employment type and a
+/// monthly salary range. Reuses <see cref="ShiftStatus"/> for lifecycle (Open/Filled/…).
+/// </summary>
+public class JobOpening
+{
+    public int Id { get; set; }
+
+    public int FacilityId { get; set; }
+    public Facility Facility { get; set; } = null!;
+
+    public int RoleId { get; set; }
+    public Role Role { get; set; } = null!;
+
+    [Required, MaxLength(200)]
+    public string Title { get; set; } = "";          // عنوان موقعیت
+
+    public EmploymentType EmploymentType { get; set; } = EmploymentType.FullTime;
+
+    public long? SalaryMin { get; set; }             // حقوق ماهانه (تومان)؛ null = توافقی
+    public long? SalaryMax { get; set; }
+
+    [MaxLength(2000)]
+    public string? Description { get; set; }
+
+    [MaxLength(1000)]
+    public string? Requirements { get; set; }        // شرایط احراز
+
+    public ShiftStatus Status { get; set; } = ShiftStatus.Open;
+    public ShiftSource Source { get; set; } = ShiftSource.Admin;
+
+    [MaxLength(500)]
+    public string? SourceUrl { get; set; }
+
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    // Transient: distance (km) when "near me" is active. Not persisted.
+    [NotMapped] public double? DistanceKm { get; set; }
+}