feat(ECR-041): OpsCMS Banner 薄写面（Write-Wave 首刀）

Admin POST/PUT + admin.cms.write/审计；C 端 GET /home/banners；首页投影回退静态 homeFeeds；migration 000051；不碰 FeedSlot/支付/UGC。

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/TEST_REPORT/ECR-041.md

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+# TEST_REPORT — ECR-041 Banner Write
+
+**Date:** 2026-08-13  
+**Commit:** (pending commit)  
+
+## Commands
+
+```bash
+cd apps/api && go test ./internal/integration/ -count=1 -run 'TestOpsCMSBanner'
+npm run test -w @yuxingu/user-h5 -- src/lib/homeCatalog.spec.ts
+python3 scripts/repo-governance-check.py
+```
+
+## Results
+
+| Check | Result |
+|-------|--------|
+| TestOpsCMSBanners (read) | PASS |
+| TestOpsCMSBannerWrite | PASS |
+| homeCatalog vitest (3) | PASS |
+| repo-governance-check | PASS · max migration 000051 |
+
+## AC map
+
+| AC | Evidence |
+|----|----------|
+| AC-F-01 | Write test create → list/get |
+| AC-F-02 | PUT active=false → C-end excludes |
+| AC-F-03 | GET /home/banners contains active home |
+| AC-F-04 | duplicate code → 409 |
+| AC-F-05 | external link_path → 400 |
+| AC-S-01/02 | 401 unauth; read-only role POST → 403 |
+| AC-A-01 | audit rows create+update |
+| AC-C-01/02 | H5 mapHomeBannersToFeeds + static fallback |
+| AC-O-01 | no FeedSlot write routes added |