feat: add tool-call fallback and resilient batch exports

tests/unit/test_unified_controller_video.py

@@ -207,6 +207,30 @@ async def test_analyzer_clip_stays_continuous_across_orientation_segments(tmp_pa
     assert len(frames) >= 20
 
 
+@pytest.mark.asyncio
+async def test_analyzer_clip_pins_requested_fps_across_recording_gap(tmp_path):
+    ffmpeg = get_ffmpeg_path()
+    first = tmp_path / "first.mkv"
+    second = tmp_path / "second.mkv"
+    output = tmp_path / "clip.mp4"
+    _make_solid_clip(ffmpeg, "red", "108x242", 1.0, first)
+    _make_solid_clip(ffmpeg, "blue", "242x108", 1.0, second)
+    assert await render_timeline_clip(
+        [{"path": first, "start": 0.0, "end": 1.0}, {"path": second, "start": 1.5, "end": 2.5}],
+        0.0,
+        2.5,
+        output,
+        canvas_width=180,
+        canvas_height=320,
+        fps=7,
+    )
+    capture = cv2.VideoCapture(str(output))
+    try:
+        assert capture.get(cv2.CAP_PROP_FPS) == pytest.approx(7.0, abs=0.1)
+    finally:
+        capture.release()
+
+
 def test_timeline_pieces_fill_restart_gaps(tmp_path):
     """Holes between segments (and a window starting in one) become black gaps."""
     first = tmp_path / "recording.mkv"