docs: document interactive TUI keybindings

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: Yukaii

README.md

@@ -60,7 +60,7 @@ For HackMD Enterprise, pass `--enterprise` or set `HMD_CLI_ENTERPRISE=true`.
 | `history` | Browsing history (`GET /history`) |
 | `status` | Server stats (`GET /status`) |
 | `teams` | List teams (enterprise only) |
-| `tui` | Interactive note browser (OpenTUI) |
+| `tui` | Interactive note browser (OpenTUI) — tabs, search, preview, delete |
 | *(stdin pipe)* | `cat doc.md \| codimd-cli` creates a note |
 
 ## CodiMD API mapping
@@ -80,6 +80,22 @@ This CLI targets the [CodiMD](https://github.com/hackmdio/codimd) HTTP surface:
 
 HackMD Enterprise mode (`--enterprise`) uses `/api/overview`, CSRF tokens, and form-encoded note creation instead.
 
+## Interactive TUI
+
+```bash
+codimd-cli tui
+```
+
+| Key | Action |
+|-----|--------|
+| `↑` / `↓` | Navigate list |
+| `Enter` | Preview selected note |
+| `Tab` / `←` `→` | Switch Notes / History tabs |
+| `/` | Focus search filter |
+| `r` | Refresh current view |
+| `d` `d` | Delete selected note (double confirm) |
+| `Ctrl+C` | Quit |
+
 ## Development
 
 ```bash