feat(dashboard): 添加首页地图展示功能

- 在 Dashboard 组件中集成锡林郭勒盟区域地图
- 实现地图数据接口和区域详情接口
- 添加地图交互功能，支持点击和悬停事件
- 更新开发计划和需求文档，增加地图展示功能

docs/design/api/dashboard.md

@@ -108,7 +108,97 @@ GET /api/v1/dashboard/history
 }
 ```
 
-### 4.3 配置接口
+### 4.3 首页地图数据接口
+
+#### 获取锡林郭勒盟区域地图数据
+```
+GET /api/v1/dashboard/map/regions
+```
+
+**请求参数**:
+- 无
+
+**响应示例**:
+```json
+{
+  "regions": [
+    {
+      "id": "xlg",
+      "name": "锡林浩特市",
+      "coordinates": [116.093, 43.946],
+      "cattle_count": 25600,
+      "farm_count": 120,
+      "output_value": 650000000
+    },
+    {
+      "id": "dwq",
+      "name": "东乌旗",
+      "coordinates": [116.980, 45.514],
+      "cattle_count": 18500,
+      "farm_count": 95,
+      "output_value": 480000000
+    },
+    {
+      "id": "xwq",
+      "name": "西乌旗",
+      "coordinates": [117.615, 44.587],
+      "cattle_count": 21200,
+      "farm_count": 108,
+      "output_value": 520000000
+    },
+    {
+      "id": "abg",
+      "name": "阿巴嘎旗",
+      "coordinates": [114.971, 44.022],
+      "cattle_count": 16800,
+      "farm_count": 86,
+      "output_value": 420000000
+    },
+    {
+      "id": "snz",
+      "name": "苏尼特左旗",
+      "coordinates": [113.653, 43.859],
+      "cattle_count": 12400,
+      "farm_count": 65,
+      "output_value": 310000000
+    }
+  ]
+}
+```
+
+#### 获取指定区域详细数据
+```
+GET /api/v1/dashboard/map/region/{regionId}
+```
+
+**请求参数**:
+- `regionId` (string, required): 区域ID
+
+**响应示例**:
+```json
+{
+  "region": {
+    "id": "xlg",
+    "name": "锡林浩特市",
+    "coordinates": [116.093, 43.946],
+    "cattle_count": 25600,
+    "farm_count": 120,
+    "output_value": 650000000,
+    "trend": "up"
+  },
+  "farms": [
+    {
+      "id": "FARM001",
+      "name": "锡林浩特市第一牧场",
+      "coordinates": [116.120, 43.950],
+      "cattle_count": 2450,
+      "output_value": 62000000
+    }
+  ]
+}
+```
+
+### 4.4 配置接口
 
 #### 获取可视化配置
 ```