docs: document feedback issue title filtering

.agents/skills/unidesk-gh/SKILL.md

@@ -43,12 +43,18 @@ bun scripts/cli.ts gh auth status [--repo owner/name]
 
 ```bash
 bun scripts/cli.ts gh issue list [owner/repo] \
-  [--state open|closed|all] [--limit N] [--search text] \
+  [--state open|closed|all] [--limit N] [--search text] [--title-prefix text] \
   [--label label[,label...]] [--repo owner/name] \
   [--json number,title,state,url,updatedAt,createdAt,author,labels] [--raw|--full]
 ```
 
-默认 `state=open`、`limit=30`。`owner/repo` 位置参数等价 `--repo`。`--search` 走 GitHub Search API 做查重。
+默认 `state=open`、`limit=30`。`owner/repo` 位置参数等价 `--repo`。`--search` 走 GitHub Search API 做查重。`--title-prefix` 在当前有界结果内按 issue 标题前缀做本地过滤，输出 `titleFilter` 的输入/输出/过滤数量，适合 `[FEEDBACK]` 去重：
+
+```bash
+bun scripts/cli.ts gh issue list --repo pikasTech/unidesk --state all \
+  --search "[FEEDBACK]" --title-prefix "[FEEDBACK]" \
+  --json number,title,state,url
+```
 
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