Bump to v2.1.0: add kao_tui.py developer TUI and WSL venv

- Add kao_tui.py: Textual TUI with Sounds, Faces, Events, Controls tabs
- Add textual to requirements.txt
- Add venv activation instructions to README
- Add Developer TUI section to README

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -33,6 +33,23 @@ python kao.py
 
 Open http://localhost:5100 on your phone (use Fully Kiosk Browser for best results).
 
+## Activating the venv
+
+Two venvs exist — one for Windows, one for WSL:
+
+```bash
+# WSL / Linux
+source venv-wsl/bin/activate
+
+# Windows (PowerShell)
+.\venv\Scripts\Activate.ps1
+
+# Windows (cmd)
+.\venv\Scripts\activate.bat
+```
+
+Deactivate either with `deactivate`.
+
 ## Status Faces
 
 | State        | Emote       | Meaning                   |
@@ -179,6 +196,23 @@ automation:
 - `animation`: `breathing`, `shaking`, `popping`, `celebrating`, `floating`, `bouncing`, `swaying`
 - `sound`: `chime`, `alert`, `warning`, `critical`, `success`, `notify`, `doorbell`, `knock`, `ding`, `blip`, `siren`, `tada`, `ping`, `bubble`, `fanfare`, `alarm`, `none`
 
+## Developer TUI
+
+`kao_tui.py` is a terminal UI for firing test events, faces, and sounds at a running Kao instance — no `curl` needed.
+
+```bash
+python kao_tui.py                        # connect to http://localhost:5100
+python kao_tui.py http://192.168.1.x:5100  # custom URL
+```
+
+Four tabs:
+- **Sounds** — fire any of the 17 sounds via `/notify`
+- **Faces** — send any preset emote/animation combo via `/notify`
+- **Events** — post Critical/Warning/Notify events (10s TTL) or clear all
+- **Controls** — Sleep, Wake, Clear all
+
+Navigate with `↑↓` or `Tab`, press `Enter` to fire, `Q` to quit. A toast confirms each action.
+
 ## API Reference
 
 | Endpoint  | Method | Description                                      |