feat(lbs): 真实距离与按距离派单落地

- 数据库：orders/activities 新增 latitude/longitude（含存量表 ALTER 迁移）

- 服务端：Haversine 计算 distanceKm/distanceText，派单池支持 lat/lng/radius 过滤并按距离升序；历史无坐标订单用腾讯地理编码兜底并回写缓存

- 新增 /api/lbs/reverse 逆地址解析（Key 仅服务端持有，登录 + 限流）

- 小程序：雷达/接单大厅改用真实定位与真实距离，删除全部写死演示距离；下单页新增地图选点，组局页保存选点经纬度

- 修复接单大厅点接单会新建订单的问题，改为真正 claimOrder 认领

- 新增 lbs-distance 护栏（110 套件/729 用例全绿）

server/tests/lbs-distance.spec.ts

@@ -0,0 +1,81 @@
+// 已读取AGENTS.md
+import * as fs from 'fs';
+import * as path from 'path';
+
+/**
+ * 第九十四批：真实距离（LBS）落地闸门。
+ * 背景：雷达页/接单大厅的「650m / 1.4km / 1.2km内」全部是写死演示值，
+ * orders/activities 也没有经纬度字段，导致「按距离派单」实际不生效。
+ */
+describe('第九十四批真实距离与 LBS 闸门', () => {
+  const root = path.resolve(__dirname, '../../');
+  const read = (rel: string) => fs.readFileSync(path.join(root, rel), 'utf-8');
+
+  const mysql = read('server/src/db/mysql.ts');
+  const repo = read('server/src/db/repository.ts');
+  const indexCode = read('server/src/index.ts');
+  const apiCode = read('pwuniapp/common/api.js');
+  const radar = read('pwuniapp/pages/expert/radar.vue');
+  const hall = read('pwuniapp/pages/expert/hall.vue');
+  const orderCreate = read('pwuniapp/pages/order/create.vue');
+  const activityCreate = read('pwuniapp/pages/activity/create.vue');
+
+  it('订单与组局表必须存储经纬度', () => {
+    expect(mysql).toContain('latitude DECIMAL(10,6)');
+    expect(mysql).toContain('longitude DECIMAL(10,6)');
+    expect(mysql).toContain('ALTER TABLE activities ADD COLUMN latitude');
+    expect(mysql).toContain('ALTER TABLE orders ADD COLUMN latitude');
+  });
+
+  it('服务端按 Haversine 计算距离并返回距离文案', () => {
+    expect(repo).toContain('export function haversineKm');
+    expect(repo).toContain('export function formatDistanceText');
+    expect(repo).toContain('distanceText');
+    expect(repo).toContain('radiusKm');
+    expect(repo).toContain('async updateOrderGeo');
+  });
+
+  it('派单池接口接收定位并按半径过滤，历史地址走腾讯地理编码兜底', () => {
+    const start = indexCode.indexOf("app.get('/api/orders/pool'");
+    expect(start).toBeGreaterThan(-1);
+    const block = indexCode.slice(start, start + 2200);
+    expect(block).toContain('req.query.lat');
+    expect(block).toContain('req.query.radius');
+    expect(block).toContain('geocodeAddress');
+    expect(block).toContain('repo.updateOrderGeo');
+  });
+
+  it('逆地址解析接口仅服务端持有 Key，并要求登录', () => {
+    expect(indexCode).toContain("app.get('/api/lbs/reverse'");
+    expect(indexCode).toContain('resolveTencentMapKey');
+    expect(indexCode).toContain("resolveSecureUserId(req, Number(req.query.userId || 0), '解析当前位置')");
+    // Key 不允许出现在小程序端
+    expect(apiCode).not.toContain('7I4BZ');
+  });
+
+  it('小程序雷达与接单大厅改用真实距离，删除写死演示距离', () => {
+    expect(radar).toContain('getUserLocation');
+    expect(radar).toContain('p.distanceText');
+    expect(radar).not.toContain("distance: '650m'");
+    expect(radar).not.toContain("dist: '1.4km'");
+
+    expect(hall).toContain('getUserLocation');
+    expect(hall).toContain('p.distanceText');
+    expect(hall).not.toContain("'1.2km内'");
+    expect(hall).not.toContain("'1.1km'");
+  });
+
+  it('下单/组局在选点后提交经纬度', () => {
+    expect(orderCreate).toContain('pickVenue');
+    expect(orderCreate).toContain('uni.chooseLocation');
+    expect(orderCreate).toContain('latitude: isOffline.value ? meetCoords.value.latitude : null');
+    expect(activityCreate).toContain('form.value.latitude');
+    expect(apiCode).toContain('latitude: payload.latitude');
+  });
+
+  it('小程序的派单池调用支持携带定位与半径', () => {
+    expect(apiCode).toContain('export async function getOrdersPool(options = {})');
+    expect(apiCode).toContain('qs.push(`lat=${lat}`, `lng=${lng}`)');
+    expect(apiCode).toContain('radius=${radius}');
+  });
+});

server/tests/orders-pool-filter.spec.ts

@@ -12,9 +12,11 @@ describe('第二十九批抢单池过滤闸门', () => {
   it('抢单池必须排除终态/已核销订单并过滤已认领订单', () => {
     const start = repoCode.indexOf('async getOrdersPool(');
     expect(start).toBeGreaterThan(-1);
-    const block = repoCode.slice(start, start + 1400);
+    const block = repoCode.slice(start, start + 5200);
     expect(block).toContain("WHERE status = '待接单'");
     expect(block).toContain('claimed_by IS NULL');
-    expect(block).toContain('LIMIT 20');
+    // SQL 多取候选，最终按距离排序后截断 20 条
+    expect(block).toContain('LIMIT 50');
+    expect(block).toContain('slice(0, 20)');
   });
 });