feat: 第二阶段核心业务模块(CRM/房务/护理/月子餐)

后端:
- 4个迁移文件新增23张业务表
- 23个Eloquent Model(含关联/类型转换/门店隔离)
- 20个Controller(含CRUD+业务操作: 合同审核/入住退房/护理异常处理等)
- 110+条API路由(crm/room/care/meal四大前缀)

前端:
- 4个API模块(crm.js/room.js/care.js/meal.js)
- 13个业务页面(线索/客户/合同/渠道/投诉/房型/房间/预定/护理档案/护理计划/护理记录/菜品/排餐)

backend/app/Http/Controllers/Admin/Care/HealthMetricController.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Http\Controllers\Admin\Care;
+
+use App\Http\Controllers\Controller;
+use App\Models\Care\HealthMetric;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class HealthMetricController extends Controller
+{
+    public function index(Request $request): JsonResponse
+    {
+        $query = HealthMetric::query()->with('recorder');
+        $query->when($request->care_profile_id, fn($q, $v) => $q->where('care_profile_id', $v));
+        $query->when($request->metric_type, fn($q, $v) => $q->where('metric_type', $v));
+        $query->when($request->start_date, fn($q, $v) => $q->where('recorded_at', '>=', $v));
+        $query->when($request->end_date, fn($q, $v) => $q->where('recorded_at', '<=', $v));
+
+        return $this->paginate($query->latest('recorded_at')->paginate($request->input('per_page', 50)));
+    }
+
+    public function store(Request $request): JsonResponse
+    {
+        $validated = $request->validate([
+            'care_profile_id' => 'required|exists:care_profiles,id',
+            'metric_type' => 'required|string|max:30',
+            'value' => 'required|numeric',
+            'unit' => 'nullable|string|max:10',
+            'recorded_at' => 'sometimes|date',
+            'remark' => 'nullable|string|max:255',
+        ]);
+        $validated['recorder_id'] = auth()->id();
+        $validated['recorded_at'] = $validated['recorded_at'] ?? now();
+
+        return $this->success(HealthMetric::create($validated));
+    }
+}