Rebuild the chrome band: full-width piano strip with uniform key widths, note tooltips, one toolbar font

src/core/instrument/ui/sample_chrome.h

@@ -1,8 +1,8 @@
 #pragma once
 // sample_chrome.h — interior geometry of the Sample face's CHROME band: the toolbar row
-// (title + Browse) over the control row (root/piano strip, preview trigger, preview-velocity
-// knob cell, curve-preview button, Mono|Stereo toggle). Reads the band rect the allocator
-// hands it (sample_bands) and never allocates vertical space of its own.
+// (title + the whole right-anchored control run + Browse) over the strip row, which the
+// piano strip has to itself. Reads the band rect the allocator hands it (sample_bands) and
+// never allocates vertical space of its own.
 
 #include "core/instrument/ui/editor_geometry.h"  // Rect
 
@@ -11,21 +11,22 @@ namespace reasampler::instrument::ui {
 inline constexpr int kNavButtonWidth = 62;  // the Browse toolbar button
 
 // Every interactive rect inside the chrome band, in one pass so draw and hit-test cannot
-// derive them differently. The control row's right-anchored run is fixed-width (preview,
-// velocity cell, curve button, channel toggle) and the root strip takes the remainder, so
-// the strip grows with the window.
+// derive them differently. The toolbar's fixed run is right-anchored and the title takes
+// what is left of that row; the strip row carries nothing but the strip, so the strip grows
+// with the window in both directions.
 struct ChromeRects {
     Rect toolbar;     // full-width top row
-    Rect navBrowse;   // right-anchored in the toolbar
-    Rect controls;    // full-width second row
-    Rect rootStrip;   // remainder-width, left
-    Rect preview;
+    Rect title;       // the title text slot: the toolbar left of the control run
+    Rect preview;     // ---- the right-anchored run, left to right ----
     Rect velCell;     // preview-velocity knob cell (knob + label band)
     Rect velKnob;
     Rect velLabel;
     Rect curveBtn;    // opens the velocity-curve popup
     Rect chanMono;
     Rect chanStereo;
+    Rect navBrowse;
+    Rect controls;    // full-width second row
+    Rect rootStrip;   // the piano strip: the whole row, inset only by the shared band pad
 };
 
 // `knobSize` is the deck knob square, passed in so this module does not depend on knob_deck.