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>

app/Models/BedStay.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\BelongsToOwner;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class BedStay extends Model
+{
+    use BelongsToOwner;
+
+    public const STATUS_ACTIVE = 'active';
+
+    public const STATUS_ENDED = 'ended';
+
+    protected $table = 'care_bed_stays';
+
+    protected $fillable = [
+        'owner_ref',
+        'organization_id',
+        'visit_id',
+        'care_unit_id',
+        'bed_id',
+        'status',
+        'admitted_at',
+        'discharged_at',
+        'admitted_by',
+        'discharged_by',
+        'reason',
+        'notes',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'admitted_at' => 'datetime',
+            'discharged_at' => 'datetime',
+        ];
+    }
+
+    public function organization(): BelongsTo
+    {
+        return $this->belongsTo(Organization::class, 'organization_id');
+    }
+
+    public function visit(): BelongsTo
+    {
+        return $this->belongsTo(Visit::class, 'visit_id');
+    }
+
+    public function careUnit(): BelongsTo
+    {
+        return $this->belongsTo(CareUnit::class, 'care_unit_id');
+    }
+
+    public function bed(): BelongsTo
+    {
+        return $this->belongsTo(Bed::class, 'bed_id');
+    }
+
+    public function scopeActive(Builder $query): Builder
+    {
+        return $query->where('status', self::STATUS_ACTIVE);
+    }
+}