Merge commit 'b9416ef803028ec37e0f2f756c051e52d52622d7' into claude/hdpi-scroll-performance-antialiasing-4ae609

# Conflicts:
#	src/vegas_mode/config.py
#	src/vegas_mode/coordinator.py

test/test_vegas_density.py

@@ -416,7 +416,7 @@ class TestStreamGrouping:
         from src.plugin_system.base_plugin import VegasDisplayMode
         imgs = [Image.new('RGB', (10, 8)) for _ in range(count)]
         return ContentSegment(
-            plugin_id=plugin_id, images=imgs, total_width=10 * count,
+            plugin_id=plugin_id, images=imgs,
             display_mode=mode or VegasDisplayMode.SCROLL)
 
     def test_grouping_preserves_plugin_boundaries(self):
@@ -437,10 +437,6 @@ class TestStreamGrouping:
         sm = self._stream([self._seg('a', 0), self._seg('b', 2)])
         assert [pid for pid, _ in sm.get_grouped_content_for_composition()] == ['b']
 
-    def test_flat_accessor_still_matches_grouped_total(self):
-        sm = self._stream([self._seg('a', 3), self._seg('b', 2)])
-        assert len(sm.get_all_content_for_composition()) == 5
-
 
 class TestApiBoundsMatchValidate:
     """
@@ -984,8 +980,8 @@ class TestRotationAcrossMultipleCycles:
     """
     The single-image crop advances a window across cycles. The second and later
     passes are where start + budget can land exactly on the image width, which
-    crashed find_blank_cut in the field and lost that plugin's content for the
-    cycle. First-pass-only tests never reach it.
+    once crashed the cut and lost that plugin's content for the cycle.
+    First-pass-only tests never reach it.
     """
 
     def test_window_advances_over_many_cycles_without_error(self):