Widen the deck row block to 1028 so the filter tie-line is exact, and accumulate the meter's block peaks instead of sampling one in 47

tests/test_keyboard_strip.cpp

@@ -306,7 +306,7 @@ static void testGutterAtTheSawtoothMaximumResidueWidth() {
 // nor the floor is covered by another test firing if either ever changes. Derived from
 // kEditorMinWidth/kEditorMinHeight (editor_session.cpp's ViewRect default IS the floor) rather
 // than a hardcoded window size, so a floor change fails HERE instead of silently moving the
-// shipped gutter out from under it. The numbers below are today's floor (1190x680); re-derive
+// shipped gutter out from under it. The numbers below are today's floor (1198x680); re-derive
 // them by hand if the floor ever moves.
 static void testGutterAtTheShippedDefaultWindowSize() {
     // Derive rootStrip's width the same way the shell does, through the real allocator +
@@ -315,14 +315,14 @@ static void testGutterAtTheShippedDefaultWindowSize() {
     const ChromeRects chrome = chromeRects(bands.chrome, /*knobSize=*/24);
     const int stripW = chrome.rootStrip.width;
     CHECK(stripW == kEditorMinWidth - 2 * kPad);
-    CHECK(stripW == 1174);
+    CHECK(stripW == 1182);
 
     const StripLayout L = layoutStrip(stripW, 30);
     CHECK(L.whiteWidth == 15);
     const int margins = L.band.width - L.keys.width;
-    CHECK(margins == 49);
+    CHECK(margins == 57);
     const int leftMargin = L.keys.x - L.band.x;
-    CHECK(leftMargin == 24);
+    CHECK(leftMargin == 28);
 }
 
 int main() {