Name captures after their source track: label and filename both, on every interactive mint site, and show the name on the panel card

tests/test_card_meta.cpp

@@ -109,7 +109,51 @@ static void testSecondsMsNearWholeSecondCarry() {
     CHECK(r == "0.999" || r == "1.000");
 }
 
+// --- the card's name strip ----------------------------------------------------
+
+// The shipping cell size (panel_state.h's kGrid).
+static const Rect kCell{40, 100, 140, 84};
+
+static void testNameStripSitsAcrossTheTopOfTheCell() {
+    const Rect s = cardNameStrip(kCell);
+    CHECK(s.x == kCell.x + kCardStripPad);
+    CHECK(s.y == kCell.y + 1);                       // clear of the selection border
+    CHECK(s.width == kCell.width - 2 * kCardStripPad);
+    CHECK(s.height == kCardStripHeight);
+}
+
+static void testNameStripNeverOverlapsTheLengthReadOut() {
+    // The read-out occupies the bottom kCardStripHeight of the same cell.
+    const Rect s = cardNameStrip(kCell);
+    CHECK(s.bottom() <= kCell.bottom() - kCardStripHeight);
+}
+
+static void testNameStripStaysInsideTheCell() {
+    const Rect s = cardNameStrip(kCell);
+    CHECK(s.x >= kCell.x);
+    CHECK(s.right() <= kCell.right());
+    CHECK(s.y >= kCell.y);
+    CHECK(s.bottom() <= kCell.bottom());
+}
+
+static void testNameStripSuppressedOnATooShortCell() {
+    // Below three strip-heights the card would be text with a sliver of waveform — draw
+    // no name rather than bury the thumbnail.
+    CHECK(cardNameStrip(Rect{0, 0, 140, 3 * kCardStripHeight - 1}).empty());
+    CHECK(!cardNameStrip(Rect{0, 0, 140, 3 * kCardStripHeight}).empty());
+}
+
+static void testNameStripSuppressedOnATooNarrowCell() {
+    CHECK(cardNameStrip(Rect{0, 0, 2 * kCardStripPad, 84}).empty());
+    CHECK(cardNameStrip(Rect{0, 0, 0, 84}).empty());
+}
+
 int main() {
+    testNameStripSitsAcrossTheTopOfTheCell();
+    testNameStripNeverOverlapsTheLengthReadOut();
+    testNameStripStaysInsideTheCell();
+    testNameStripSuppressedOnATooShortCell();
+    testNameStripSuppressedOnATooNarrowCell();
     testZeroLengthIsBarOneOrigin();
     testSubBeat();
     testWholeBeatWithinBar();