refactor(api): complete fastapi migration and related features

Finish native FastAPI controllers, drop vendored microdot, and add
Wi-Fi driver runtime, beat SSE, simulated BPM, sequence playback
improvements, bridge ESP-NOW sources, UI updates, and tests.

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

tests/models/test_sequence.py

@@ -27,7 +27,6 @@ def test_sequence():
     assert sequence["lanes"] == [[]]
     assert sequence.get("lanes_group_ids") == [[]]
     assert sequence.get("advance_mode") == "beats"
-    assert sequence.get("simulated_bpm") == 120
     assert sequence["step_duration_ms"] == 3000
     assert sequence["loop"] is True
     assert sequence.get("sequence_transition") == 500
@@ -43,7 +42,6 @@ def test_sequence():
         "step_duration_ms": 5000,
         "loop": True,
         "advance_mode": "beats",
-        "simulated_bpm": 128,
     }
     result = sequences.update(sequence_id, update_data)
     assert result is True
@@ -58,7 +56,6 @@ def test_sequence():
     assert len(updated["lanes"][0]) == 2
     assert updated["lanes"][0][0]["beats"] == 2
     assert updated.get("advance_mode") == "beats"
-    assert updated.get("simulated_bpm") == 128
     assert updated["step_duration_ms"] == 5000
     assert updated["loop"] is True