docs: list codex_navigate_back/forward in README tool tables

Co-Authored-By: Claude <noreply@anthropic.com>

Author: DeliciousBuding

README.md

@@ -235,11 +235,13 @@ quit
 
 ### Navigation
 
-| Tool                  | Description                                         |
-| --------------------- | --------------------------------------------------- |
-| `codex_navigate`      | Navigate a tab to a URL                             |
-| `codex_reload`        | Reload a tab                                        |
-| `codex_wait_for_load` | Poll `document.readyState` until `complete`         |
+| Tool                       | Description                                         |
+| -------------------------- | --------------------------------------------------- |
+| `codex_navigate`           | Navigate a tab to a URL                             |
+| `codex_navigate_back`      | Navigate a tab back one entry in its history        |
+| `codex_navigate_forward`   | Navigate a tab forward one entry in its history     |
+| `codex_reload`             | Reload a tab                                        |
+| `codex_wait_for_load`      | Poll `document.readyState` until `complete`         |
 
 ### Page inspection
 

README.zh-CN.md

@@ -218,6 +218,8 @@ info          ping          try <method> [json]   quit
 | 工具 | 说明 |
 |------|------|
 | `codex_navigate` | 导航到指定 URL |
+| `codex_navigate_back` | 历史记录后退一项 |
+| `codex_navigate_forward` | 历史记录前进一项 |
 | `codex_reload` | 重新加载标签页 |
 | `codex_wait_for_load` | 轮询 `document.readyState` 直到 `complete` |