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>

frontend-web/src/strategy-components/api/skill-addresses.ts

@@ -80,10 +80,18 @@ export interface ApplyResult {
   warnings: string[];
 }
 
+export interface BackupReplacement {
+  from: string;
+  to: string;
+  kind: AddressKind;
+}
+
 export interface BackupEntry {
   backupId: string;
   files: number;
   createdAt: string;
+  replacedTotal: number;
+  replacements: BackupReplacement[];
 }
 
 /** 扫描进度（逐技能）。 */
@@ -249,7 +257,13 @@ export async function applyReplacementsStream(
 export async function listBackups(): Promise<BackupEntry[]> {
   const res = await apiFetch(`${BASE()}/backups`, { method: "GET" });
   const data = await readJson<{ backups: any[] }>(res, "读取备份");
-  return (data.backups ?? []).map((b) => ({ backupId: b.backup_id, files: b.files ?? 0, createdAt: b.created_at ?? "" }));
+  return (data.backups ?? []).map((b) => ({
+    backupId: b.backup_id,
+    files: b.files ?? 0,
+    createdAt: b.created_at ?? "",
+    replacedTotal: b.replaced_total ?? 0,
+    replacements: (b.replacements ?? []).map((r: any) => ({ from: r.from, to: r.to, kind: r.kind })),
+  }));
 }
 
 export async function rollbackBackup(backupId: string): Promise<{ restored: number }> {