Add visit placement on care units and beds.

Patients can be admitted, transferred, and discharged from unit/bed stays with occupancy sync, so MAR and ward boards have inpatient context.

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/2026_07_20_120000_add_visit_placement_and_bed_stays.php

@@ -0,0 +1,58 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * Inpatient placement: visit ↔ care unit / bed + stay history.
+ */
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('care_visits', function (Blueprint $table) {
+            $table->foreignId('care_unit_id')->nullable()->after('patient_id')
+                ->constrained('care_care_units')->nullOnDelete();
+            $table->foreignId('bed_id')->nullable()->after('care_unit_id')
+                ->constrained('care_beds')->nullOnDelete();
+            $table->timestamp('placed_at')->nullable()->after('bed_id');
+            $table->string('placed_by')->nullable()->after('placed_at');
+            $table->index(['care_unit_id', 'status']);
+            $table->index(['bed_id']);
+        });
+
+        Schema::create('care_bed_stays', function (Blueprint $table) {
+            $table->id();
+            $table->string('owner_ref')->index();
+            $table->foreignId('organization_id')->constrained('care_organizations')->cascadeOnDelete();
+            $table->foreignId('visit_id')->constrained('care_visits')->cascadeOnDelete();
+            $table->foreignId('care_unit_id')->constrained('care_care_units')->cascadeOnDelete();
+            $table->foreignId('bed_id')->nullable()->constrained('care_beds')->nullOnDelete();
+            /** active | ended */
+            $table->string('status')->default('active');
+            $table->timestamp('admitted_at');
+            $table->timestamp('discharged_at')->nullable();
+            $table->string('admitted_by')->nullable();
+            $table->string('discharged_by')->nullable();
+            $table->string('reason')->nullable(); // admit | transfer | discharge
+            $table->text('notes')->nullable();
+            $table->timestamps();
+
+            $table->index(['care_unit_id', 'status']);
+            $table->index(['bed_id', 'status']);
+            $table->index(['visit_id', 'status']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('care_bed_stays');
+
+        Schema::table('care_visits', function (Blueprint $table) {
+            $table->dropConstrainedForeignId('bed_id');
+            $table->dropConstrainedForeignId('care_unit_id');
+            $table->dropColumn(['placed_at', 'placed_by']);
+        });
+    }
+};