feat: device model, API, static UI, and endpoint tests

Made-with: Cursor

tests/models/run_all.py

@@ -12,6 +12,7 @@ from test_group import test_group
 from test_sequence import test_sequence
 from test_tab import test_tab
 from test_palette import test_palette
+from test_device import test_device
 
 def run_all_tests():
     """Run all model tests."""
@@ -27,6 +28,7 @@ def run_all_tests():
         ("Sequence", test_sequence),
         ("Tab", test_tab),
         ("Palette", test_palette),
+        ("Device", test_device),
     ]
     
     passed = 0