fix(filelib): 恢复撞名不再死锁,自动改名「(已恢复)」(ADR-0033)

- restore 前查活跃兄弟:撞名则恢复为「原名(已恢复[/ N])」(截断计入
  128 长度预算),同事务落审计并记 renamedFrom;API 返回最终名
- BinView toast 提示改名;测试补撞名/二次恢复用例

hub/filelib-web/src/lib/BinView.svelte

@@ -36,8 +36,15 @@
   async function restore(e: BinEntry): Promise<void> {
     busyId = e.id;
     try {
-      await api(`/database/api/bin/${encodeURIComponent(e.id)}/restore`, { method: "POST" });
-      toastOk(`已恢复「${e.name}」`);
+      const r = await api<{ name: string; renamedFrom?: string }>(
+        `/database/api/bin/${encodeURIComponent(e.id)}/restore`,
+        { method: "POST" },
+      );
+      toastOk(
+        r.renamedFrom !== undefined && r.renamedFrom !== r.name
+          ? `已恢复为「${r.name}」(原名与现有节点冲突)`
+          : `已恢复「${r.name}」`,
+      );
       await load();
     } catch (err) {
       toastErr(err instanceof Error ? err.message : String(err));