[Applications] Applicant pipeline: employer accept/reject + status to applicant

InterestEvent gains a Status (ApplicationStatus: Interested→Accepted/Rejected; migration, default Interested). Employer/Listings shows each applicant's status with پذیرفتن/رد buttons (ownership-checked handlers update the status and notify the applicant via bell/SSE/push linking to the listing). The کارجو panel (/Me) now shows a status badge (در انتظار بررسی / پذیرفته شد / رد شد) on each applied shift/job. Reusable _ApplicantRow partial for the employer list.

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

src/JobsMedical.Web/Migrations/20260604175649_ApplicationStatus.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace JobsMedical.Web.Migrations
+{
+    /// <inheritdoc />
+    public partial class ApplicationStatus : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "Status",
+                table: "InterestEvents",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Status",
+                table: "InterestEvents");
+        }
+    }
+}

src/JobsMedical.Web/Migrations/AppDbContextModelSnapshot.cs

@@ -438,6 +438,9 @@ namespace JobsMedical.Web.Migrations
                     b.Property<int?>("ShiftId")
                         .HasColumnType("integer");
 
+                    b.Property<int>("Status")
+                        .HasColumnType("integer");
+
                     b.Property<string>("VisitorId")
                         .IsRequired()
                         .HasColumnType("character varying(36)");