feat: Textual TUI app — widget rendering, socket client, user events

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

tests/test_tui.py

@@ -0,0 +1,57 @@
+import asyncio
+import json
+
+import pytest
+from textual.app import App
+
+from kitty_workbench.tui import KittWorkbenchApp
+from kitty_workbench.protocol import (
+    encode_message, InitCmd, DisplayCmd, LayoutCmd, LogCmd, ClearCmd, ShutdownCmd,
+)
+
+
+@pytest.mark.asyncio
+async def test_app_instantiates():
+    app = KittWorkbenchApp(socket_path="/tmp/nonexistent.sock")
+    assert isinstance(app, App)
+
+
+@pytest.mark.asyncio
+async def test_app_handles_markdown_display():
+    app = KittWorkbenchApp(socket_path="/tmp/nonexistent.sock")
+    async with app.run_test(size=(80, 24)) as pilot:
+        app.handle_command(DisplayCmd(
+            widget="markdown",
+            content="# Hello World\n\nThis is a test.",
+            pane="main",
+        ))
+        await pilot.pause()
+        assert app.is_running
+
+
+@pytest.mark.asyncio
+async def test_app_handles_layout():
+    app = KittWorkbenchApp(socket_path="/tmp/nonexistent.sock")
+    async with app.run_test(size=(80, 24)) as pilot:
+        app.handle_command(LayoutCmd(panes={
+            "main": {"ratio": 2},
+            "sidebar": {"ratio": 1, "position": "right"},
+            "log": {"ratio": 1, "position": "bottom"},
+        }))
+        await pilot.pause()
+        assert app.query_one("#sidebar") is not None
+        assert app.query_one("#log") is not None
+
+
+@pytest.mark.asyncio
+async def test_app_handles_log():
+    app = KittWorkbenchApp(socket_path="/tmp/nonexistent.sock")
+    async with app.run_test(size=(80, 24)) as pilot:
+        app.handle_command(LayoutCmd(panes={
+            "main": {"ratio": 2},
+            "log": {"ratio": 1, "position": "bottom"},
+        }))
+        await pilot.pause()
+        app.handle_command(LogCmd(entry="R412 measured 1.05M — FAIL", level="warning"))
+        await pilot.pause()
+        assert app.is_running