Ψ-W2-T1 remediation: scrim the card name over the waveform, hedge two SDK claims, fix a UTF-8-truncation empty-label bug, file the legibility DAW deferral

tests/test_theme.cpp

@@ -250,6 +250,25 @@ static void testTextOnHoverSurfaceClearsFloor() {
     CHECK(contrastRatio(roleColor(Role::TextDim), hover) >= textFloor(TextClass::Large));
 }
 
+// The card name strip (panel_render.cpp's drawCardName) draws text/primary Micro (10px, BODY
+// class) over a bg/base scrim at kCardNameScrimAlpha, itself drawn over whatever the waveform
+// left in that rect. Enumerate both backgrounds a loud/quiet capture can leave there: the
+// accent-lime fill (a full-scale peak reaching the strip) and bare bg/cell (a quiet capture,
+// nothing painted that high). Unscrimmed, text/primary reads ~1:1 against the fill — this is
+// the load-bearing check that the scrim actually fixes it.
+static void testCardNameScrimClearsBodyFloorOnItsWorstBackground() {
+    const KitColor scrim = roleColor(Role::BgBase);
+    const KitColor onFill = compositeOver(scrim, roleColor(Role::AccentPrimary),
+                                          kCardNameScrimAlpha);
+    const KitColor onCell = compositeOver(scrim, roleColor(Role::BgCell), kCardNameScrimAlpha);
+    CHECK(contrastRatio(roleColor(Role::TextPrimary), onFill) >= textFloor(TextClass::Body));
+    CHECK(contrastRatio(roleColor(Role::TextPrimary), onCell) >= textFloor(TextClass::Body));
+    // Without the scrim, text/primary on the bare accent-lime fill is UNDER floor — pins the
+    // defect the scrim exists to close, so a future removal of the scrim fails this first.
+    CHECK(contrastRatio(roleColor(Role::TextPrimary), roleColor(Role::AccentPrimary))
+          < textFloor(TextClass::Body));
+}
+
 // --- Single point of change (structural guarantee) ----------------------------
 //
 // roleColor is the ONLY color source; there is no other public accessor that yields a
@@ -346,6 +365,7 @@ int main() {
     testRegionTitleAccentsClearLargeFloorOnPanel();
     testTextOnPastelFillClearsBodyFloor();
     testTextOnHoverSurfaceClearsFloor();
+    testCardNameScrimClearsBodyFloorOnItsWorstBackground();
     testCurveTraceOnHoverSurfaceClearsFloor();
     testSecondaryTertiaryAreDistinguishable();
     testOverlayTraceClearsIndicatorFloorOnTheWaveform();