fix(draw_kit): reclaim 4x waveform oversample; relocate waveformColumnCount to component_geometry

kWaveformOversample set to 1 (was 4) — overbinning produced byte-identical pixels because columnMinMax exact partition already makes the draw gap-free. Comments credit columnMinMax, not oversampling.

src/draw_kit.cpp

@@ -277,11 +277,6 @@ void drawListRow(LICE_IBitmap* bmp, const ListRowBox& row, const char* label,
     }
 }
 
-int waveformColumnCount(const KitBox& box) {
-    const int w = box.width - 4;  // fixed 2px inset each side (matches drawWaveform below)
-    return w > 0 ? w : 0;
-}
-
 void drawWaveform(LICE_IBitmap* bmp, const KitBox& box, const Envelope& env) {
     if (!bmp || box.empty()) return;
 
@@ -311,11 +306,12 @@ void drawWaveform(LICE_IBitmap* bmp, const KitBox& box, const Envelope& env) {
         if (bins.empty() || innerW <= 0) continue;
 
         // Render one filled vertical span per pixel column. peaks::columnMinMax merges
-        // all bins that project to column `col` under the same partition as
-        // computeEnvelope, so every pixel column is covered with no gaps regardless of
-        // the bins-to-pixels ratio — callers oversample (kWaveformOversample bins per
-        // column) so each span shows true extremes. Same dB display compression
-        // everywhere (bank_grid, pure).
+        // all bins that project to column `col` under the exact same partition as
+        // computeEnvelope used to build the envelope, so every pixel column is covered
+        // with no gaps regardless of the bins-to-pixels ratio. With one bin per column
+        // (kWaveformOversample == 1) each span covers the true min/max of exactly the
+        // frames that fall in that column. Same dB display compression everywhere
+        // (bank_grid, pure).
         for (int col = 0; col < innerW; ++col) {
             const MinMax mm = columnMinMax(bins, innerW, col);
             const int x = box.x + 2 + col;