docs: add maintenance discontinuation notice

- Add maintenance notice to README.md (bilingual: Chinese and English)
- Display notice in TUI welcome screen
- Project maintenance discontinued as of December 11th
- Contact 大米树 (DaMiShu) for maintenance takeover inquiries

Author: zcg

README.md

@@ -1,3 +1,9 @@
+> **⚠️ 维护公告 / Maintenance Notice**
+> 本项目维护者精力有限，不打算维护，已于 12.11 停止维护。有接收维护意愿的可向大米树申请资格。维护较简单，使用 claude code 让 AI 合并上游处理冲突和 clippy 报错即可。
+> _This project maintenance has been discontinued as of December 11th. Anyone interested in taking over maintenance can apply to 大米树 (DaMiShu). Maintenance is relatively simple - use Claude Code to let AI merge upstream and handle conflicts and clippy errors._
+
+---
+
 <p align="center"><code>npm i -g @openai/codex</code><br />or <code>brew install --cask codex</code></p>
 
 <p align="center"><strong>Codex CLI</strong> is a coding agent from OpenAI that runs locally on your computer.

codex-rs/tui/src/onboarding/welcome.rs

@@ -80,6 +80,20 @@ impl WidgetRef for &WelcomeWidget {
             "Codex".bold(),
             ", OpenAI's command-line coding agent".into(),
         ]));
+        lines.push("".into());
+        lines.push(Line::from(vec![
+            "  ".into(),
+            "⚠️  ".into(),
+            "本项目维护者精力有限，不打算维护，已于12.11停止维护。".into(),
+        ]));
+        lines.push(Line::from(vec![
+            "  ".into(),
+            "   有接收维护意愿的可向大米树申请资格。".into(),
+        ]));
+        lines.push(Line::from(vec![
+            "  ".into(),
+            "   维护较简单，使用claude code让ai合并上游处理冲突和clippy报错即可。".into(),
+        ]));
 
         Paragraph::new(lines)
             .wrap(Wrap { trim: false })