fix(ops-backend/service-station): close Phase 19 KEEP-VERIFY — 25 defects (unreachable announcements + station write privilege escalation; banner 500 + soft-delete leak; content publish dead-end; program approval dead-end/draft leak/zero counts/missing withdraw; zero-coverage test schema) ; add V042 announcement chain + 34 guard tests; full regression 602 green

Backend
- Service Station: expose the 「临时公告」 chain end-to-end (V042 table/service existed
  but had ZERO endpoints -> both admin and miniapp could never reach it): 5 operator
  endpoints (list/create/update/publish/archive) + 1 user-facing read endpoint.
- Fix privilege escalation: create/update were guarded only by the class-level
  service_location.view, making V015's service_location.manage a never-used dead
  permission -> read-only roles could edit stations. Permissions moved to method level.
- Add ServiceLocationOperatorController to OperatorEndpointPermissionCoverageTest
  (it was NOT scanned, which is why the escalation stayed invisible).
- Add create/update validation (address NOT NULL + status CHECK only blew up on PG).
- Banner: validation failures threw bare RuntimeException -> 500; now VALIDATION_ERROR
  -> 400. Add deleted_at IS NULL to both home queries (soft-deleted banners stayed live).
- Content: operator list/detail split (admin «publish» was a dead end because it reused
  the published-only public API); category deactivate/reactivate; article body on edit.
- Service Program: operator member list now includes pending (approval reachable);
  active-only public visibility (draft leak); memberCount/pendingCount aggregation;
  withdraw/removeMember; reuse row on re-apply (UNIQUE(program_id,user_id) crash).
- MeController: add the missing GET /me/service-history route.

Schema / guards
- schema-h2.sql: add service_location_announcements (+ chk_announcement_status) and
  content_categories (+ uk_content_category_code, chk_category_status); move both into
  REQUIRED_IN_TEST_SCHEMA. MigrationValidationTest baseline 41 -> 42.
- V11PermissionMatrixContractTest now scans ALL migrations instead of hardcoding V015+V029.
- New: ServiceLocationAnnouncementPhase19IntegrationTest (24),
  ServiceLocationControllerPermissionContractTest (5),
  ServiceLocationAnnouncementConstraintParityTest (5, prod DDL <-> test schema <->
  backend whitelist <-> admin labels).

Frontend
- admin-web: ServiceStationView gains announcement management (statuses, create/edit,
  publish/archive with confirm, expiry); write buttons gated by service_location.manage.
- miniapp: U50 renders the 临时公告 block via new serviceStationService; page no longer
  talks to utils/api directly; announcement failure degrades to [] instead of erroring.
- ui-tests: U37 four-group + U50 announcement contracts; /home assertion retargeted to
  the service layer.

Verification
- Negative verification: 3 injected defects (drop soft-delete filter / drop test-schema
  CHECK / downgrade write endpoint to view) -> 4 named tests fail precisely, no
  collateral failures; restored, NEG-VAL residue = 0.
- Backend full regression: 602 tests, 0 failures, 0 errors, 3 skipped (baseline 420).
- admin-web: vue-tsc --noEmit EXIT=0, vite build EXIT=0. Miniapp: tsc --noEmit EXIT=0.
- ui-tests 14/14 PASS.

miniapp/pages/service-appointment/service-appointment.js

@@ -1 +1,92 @@
-Page({data:{date:'',service:'请选择服务项目',services:['资料填写协助','公益红娘咨询','活动报名指导','婚恋咨询预约'],note:''},chooseService(e){this.setData({service:this.data.services[Number(e.detail.value)]})},chooseDate(e){this.setData({date:e.detail.value})},submit(){if(!this.data.date)return wx.showToast({title:'请选择预约日期',icon:'none'});wx.showModal({title:'预约已提交',content:'工作人员确认后会通过平台通知你。',showCancel:false,success(){wx.navigateTo({url:'/pages/my-appointments/my-appointments'})}})}})
+/**
+ * U51 服务预约
+ *
+ * Phase 19：此前提交只弹本地 Modal（后端收不到任何记录），属"假成功"。
+ * 现接入 POST /service-appointments：来源由服务端强制为 user_self，
+ * 前端**不传** requestSource / createdByOperatorId / userId（防伪造运营代登记身份）。
+ *
+ * 站点上下文：从 U50 服务站页跳转时携带 `?serviceLocationId=`，本页解析后
+ * 原样回传，保证预约真正落在该站点；站点名仅作展示，解析失败不阻断提交。
+ */
+const { serviceAppointmentService } = require('../../services');
+
+const SERVICE_OPTIONS = [
+  { label: '到站资料协助', type: 'station_visit' },
+  { label: '公益红娘咨询', type: 'matchmaker' },
+  { label: '活动报名指导', type: 'station_visit' },
+  { label: '婚恋咨询预约', type: 'counselor_consultation' },
+];
+
+Page({
+  data: {
+    services: SERVICE_OPTIONS.map((option) => option.label),
+    service: '请选择服务项目',
+    date: '',
+    note: '',
+    serviceLocationId: '',
+    serviceLocationName: '',
+    submitting: false,
+  },
+  selectedIndex: -1,
+  onLoad(options) {
+    const raw = options && options.serviceLocationId;
+    const serviceLocationId = raw ? decodeURIComponent(raw).trim() : '';
+    if (!serviceLocationId) {
+      return;
+    }
+    this.setData({ serviceLocationId });
+    this.resolveStationName(serviceLocationId);
+  },
+  async resolveStationName(serviceLocationId) {
+    const location = await serviceAppointmentService.getCurrentServiceLocation();
+    if (location && location.id === serviceLocationId) {
+      this.setData({ serviceLocationName: location.name });
+    } else {
+      // 站点信息不可得时仍保留归属 ID，仅以占位文案展示，避免误导为空
+      this.setData({ serviceLocationName: '已选服务站点' });
+    }
+  },
+  chooseService(event) {
+    const index = Number(event.detail.value);
+    this.selectedIndex = index;
+    this.setData({ service: SERVICE_OPTIONS[index].label });
+  },
+  chooseDate(event) {
+    this.setData({ date: event.detail.value });
+  },
+  onNoteInput(event) {
+    this.setData({ note: event.detail.value });
+  },
+  async submit() {
+    if (this.selectedIndex < 0) {
+      wx.showToast({ title: '请选择服务项目', icon: 'none' });
+      return;
+    }
+    if (!this.data.date) {
+      wx.showToast({ title: '请选择预约日期', icon: 'none' });
+      return;
+    }
+    if (this.data.submitting) {
+      return;
+    }
+    this.setData({ submitting: true });
+    try {
+      await serviceAppointmentService.createAppointment({
+        serviceLocationId: this.data.serviceLocationId || undefined,
+        serviceType: SERVICE_OPTIONS[this.selectedIndex].type,
+        preferredDate: this.data.date,
+        userNote: this.data.note,
+      });
+      wx.showModal({
+        title: '预约已提交',
+        content: '工作人员确认后会通过平台通知你。',
+        showCancel: false,
+        success: () => wx.navigateTo({ url: '/pages/my-appointments/my-appointments' }),
+      });
+    } catch (error) {
+      wx.showToast({ title: '提交失败，请稍后重试', icon: 'none' });
+    } finally {
+      this.setData({ submitting: false });
+    }
+  },
+});