docs: add release runbook and seed data

docs/api/manual-test-checklist.md

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+# Manual Test Checklist
+
+Use this checklist after starting the backend, admin web, rider H5, and opening the miniapp in WeChat DevTools.
+
+- [ ] Admin can log in with `admin / admin123`.
+- [ ] Admin can create and publish a notice.
+- [ ] Miniapp can list published notices.
+- [ ] Admin can create product and SKU stock.
+- [ ] Miniapp can submit goods order.
+- [ ] Admin can confirm goods order and mark prepared.
+- [ ] Admin can assign delivery order to rider.
+- [ ] Rider can log in with `rider / rider123`.
+- [ ] Rider can start delivery and upload delivered photo.
+- [ ] Miniapp can confirm goods order completion.
+- [ ] Miniapp can submit express pickup order.
+- [ ] Admin can confirm express order and assign rider.
+- [ ] Rider can mark express order delivered.
+- [ ] Miniapp can submit group buy order before cutoff.
+- [ ] Admin can review secondhand listing.
+- [ ] Public secondhand list only shows approved listings.
+
+Notes:
+
+- Resident miniapp login uses `/api/auth/dev-miniapp-login` in local mode.
+- Current payment flow is offline payment status tracking; WeChat Pay is reserved for a later integration.
+- The backend service layer is still in-memory for this MVP. The SQL seed is kept ready for the persistence milestone.

docs/deploy/local-runbook.md

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+# Local Runbook
+
+## Prerequisites
+
+- JDK 8
+- Maven
+- Node.js 18+
+- Docker Desktop, for MySQL, Redis, and MinIO
+- WeChat DevTools, for native miniapp compile and preview
+
+## Start Dependencies
+
+```powershell
+docker compose -f deploy/docker-compose.dev.yml up -d
+```
+
+Expected dependency URLs:
+
+```text
+MySQL: localhost:3306
+Redis: localhost:6379
+MinIO API: http://localhost:9000
+MinIO console: http://localhost:9001
+```
+
+## Start Backend
+
+```powershell
+cd backend
+mvn spring-boot:run
+```
+
+Expected local URLs:
+
+```text
+Backend API: http://localhost:8080
+Knife4j docs: http://localhost:8080/doc.html
+```
+
+Demo accounts:
+
+```text
+Admin: admin / admin123
+Merchant: merchant / merchant123
+Rider: rider / rider123
+Resident: dev miniapp login
+```
+
+## Start Admin Web
+
+```powershell
+cd admin-web
+npm install
+npm run dev
+```
+
+URL:
+
+```text
+http://localhost:5173
+```
+
+## Start Rider H5
+
+```powershell
+cd rider-h5
+npm install
+npm run dev
+```
+
+URL:
+
+```text
+http://localhost:5174
+```
+
+## Open Miniapp
+
+Use WeChat DevTools to open:
+
+```text
+miniapp/project.config.json
+```
+
+The miniapp request base URL is configured in `miniapp/miniprogram/utils/request.js`.
+
+## Verification Commands
+
+```powershell
+cd backend
+mvn test
+
+cd ..\admin-web
+npm test
+npm run build
+
+cd ..\miniapp
+npm test
+
+cd ..\rider-h5
+npm test
+npm run build
+```