docs: add recovery command to quick-start section in all 4 READMEs

After the phase table, now shows the exact sentence to tell the AI
when resuming interrupted work (in each language).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: zhonghui

README.en.md

@@ -46,9 +46,11 @@ Five phases — launch your AI assistant directly from the Agent spec files:
 | Phase 4 | Triple Review (parallel) | [`agents/06-code-reviewer.md`](agents/06-code-reviewer.md), [`agents/07-consistency-reviewer.md`](agents/07-consistency-reviewer.md), [`agents/08-content-reviewer.md`](agents/08-content-reviewer.md) |
 | Phase 5 | Publish | [`agents/10-bookbinder.md`](agents/10-bookbinder.md) |
 
-Progress tracking: [`templates/checkpoint.md`](templates/checkpoint.md)　　Checkpoint recovery: [`framework/recovery.md`](framework/recovery.md)
+Progress tracking: [`templates/checkpoint.md`](templates/checkpoint.md)　　Recovery: [`framework/recovery.md`](framework/recovery.md)
+
+**After an interruption, tell your AI**: `Please read checkpoint.md and continue where we left off.`
+
 
-## 3. Use Cases
 
 This framework is suited for the following types of technical book projects:
 

README.ja.md

@@ -50,7 +50,9 @@
 
 進捗管理：[`templates/checkpoint.md`](templates/checkpoint.md)　　チェックポイント回復：[`framework/recovery.md`](framework/recovery.md)
 
-## 3. 適用シナリオ
+**中断後の再開**：AI アシスタントに伝えるだけ → `checkpoint.md を読んで、前回の続きから作業を再開してください。`
+
+
 
 本フレームワークは以下の種類の技術書籍プロジェクトに適しています：
 

README.md

@@ -40,7 +40,9 @@
 
 进度追踪：[`templates/checkpoint.md`](templates/checkpoint.md)　　断点恢复：[`framework/recovery.md`](framework/recovery.md)
 
-## 3. 适用场景
+**中断后恢复**：告诉 AI 助手 → `请读 checkpoint.md，继续上次未完成的工作。`
+
+
 
 本框架适用于以下类型的技术书籍项目：
 

README.zh-TW.md

@@ -50,7 +50,9 @@
 
 進度追蹤：[`templates/checkpoint.md`](templates/checkpoint.md)　　斷點恢復：[`framework/recovery.md`](framework/recovery.md)
 
-## 3. 適用場景
+**中斷後恢復**：告訴 AI 助手 → `請讀 checkpoint.md，繼續上次未完成的工作。`
+
+
 
 本框架適用於以下類型的技術書籍項目：