feat(skill-addresses): 新增技能地址修改记录，支持单次记录回退

后端：
- 每次「应用」写一份 {id}.manifest.json（记录本次 from→to 替换明细/文件数/处数），
  放在备份目录的同级，避免被回退误恢复或计入文件数
- GET /backups 返回每条记录的 replaced_total + replacements；POST /rollback/{id} 回退单条

前端：
- 把「撤销上次」升级为「修改记录」面板：每条显示时间/改了哪些地址/文件数，
  带「回退此次」（二次确认）；应用后自动展开
- BackupEntry 类型扩展 replacedTotal + replacements

同步更新前后端 CLAUDE.md。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

offline-backend-20260512/backend/CLAUDE.md

@@ -556,6 +556,14 @@ snippet) and replaced together.
   `{skills_root}/.address-edits/{timestamp}/` (the `.`-prefixed dir is excluded
   from scans), then `refresh_skills_system_prompt_cache_async()` so edits take
   effect immediately. Registered in `app.py` after `sensitive_words.router`.
+  **Per-edit history:** each apply also writes a sibling manifest
+  `{skills_root}/.address-edits/{timestamp}.manifest.json` (best-effort) capturing
+  `{created_at, replaced_total, replacements:[{from,to,kind}], changed_files}`; the
+  sibling-not-child placement keeps it out of both the restore set and the file
+  count. `GET /backups` returns each record enriched with `replaced_total` +
+  `replacements` (from the manifest; falls back to dir mtime when absent), and
+  `POST /rollback/{backup_id}` restores a single record — so the UI shows a full
+  modification history and rolls back any one entry independently.
 - **Frontend** — the panel is the reusable `SkillAddressesPanel` (exported from
   `pages/SkillAddressesPage.tsx`; its default export keeps the standalone route
   `/page/strategy/admin/skill-addresses` as a direct-link fallback). It is
@@ -567,7 +575,10 @@ snippet) and replaced together.
   auto-scan on open with a **progress bar** (扫描逐技能 / 应用逐文件 X/N), URL/IP
   type filter, search, a「片段批量套用」helper (e.g. all `uat.4.cn` → `prod.4.cn`),
   per-address「替换为」input with expandable occurrences, inline 预览 panel, 应用,
-  and 撤销上次 (rollback). Client + NDJSON stream parsing in
+  **multi-keyword search** (space-separated, all-must-hit), and a **修改记录**
+  (modification history) panel — each apply is one record (time / which addresses
+  changed from→to / file & replacement counts) with a per-record 回退此次
+  (single-record rollback, with inline confirm). Client + NDJSON stream parsing in
   `strategy-components/api/skill-addresses.ts`. Scope is the running skills only;
   the `deploy/minimal/skills/` copy is not touched (sync separately).