Initial upload: DevDash CLI with TUI dashboard

tests/test_integration.py

@@ -0,0 +1,19 @@
+import pytest
+from textual.app import App
+from textual.screen import Screen
+from src.ui.screens.dashboard import DashboardScreen
+from src.cli import cli
+from click.testing import CliRunner
+
+
+class TestDashboardIntegration:
+    def test_dashboard_screen_composes(self):
+        app = App()
+        screen = DashboardScreen()
+        assert screen is not None
+
+    def test_cli_entry_point(self):
+        runner = CliRunner()
+        result = runner.invoke(cli, ["--help"])
+        assert result.exit_code == 0
+        assert "DevDash CLI" in result.output