test(v3): accept the tuning-perspective indirection in the badge guard

The album-art badge now reads shownTuningName(), so the source-pattern guard
no longer matched the inline `tuning_name || tuning` form and CI went red.
Accept the helper, and pin the helper's own fallback in a companion test so
the guard still fails if a guitar player's tuning label is ever dropped.

Signed-off-by: ChrisBeWithYou <christian.a.cowan@gmail.com>

tests/js/v3_songs_tuning.test.js

@@ -67,11 +67,27 @@ test('v3 songs.js uses display helpers for album-art tuning badge', () => {
     const src = fs.readFileSync(SONGS_JS, 'utf8');
     // The card renderer's row variable was renamed song → shown when grouped
     // cards landed (the badge reads the representative chart); accept either.
-    assert.match(src, /displayTuningName\((?:song|shown)\.tuning_name \|\| (?:song|shown)\.tuning\)/);
+    // The raw read then moved behind shownTuningName() so the badge can answer
+    // for the active tuning perspective — accept that indirection too, and pin
+    // the fallback inside the helper below so this stays a real guard.
+    assert.match(
+        src,
+        /displayTuningName\((?:(?:song|shown)\.tuning_name \|\| (?:song|shown)\.tuning|shownTuning)\)/,
+    );
     assert.match(src, /displayTuningTargets/);
     assert.match(src, /parseRawTuningOffsets/);
 });
 
+test('the tuning-perspective helper still falls back to tuning_name || tuning', () => {
+    // shownTuningName() is what the badge now reads. With no perspective field
+    // set (guitar-lead, the default) it must resolve exactly what the badge
+    // used to read inline, or guitar players silently lose their tuning label.
+    const src = fs.readFileSync(SONGS_JS, 'utf8');
+    const body = src.match(/function shownTuningName\(song\)\s*\{[\s\S]*?\n {4}\}/);
+    assert.ok(body, 'shownTuningName() not found — the badge read moved again');
+    assert.match(body[0], /return song\.tuning_name \|\| song\.tuning;/);
+});
+
 test('raw offset tuning_name does not appear in rendered card HTML', () => {
     const html = renderSongCardBadge({ tuning_name: '-2 0 0 0 -2' }, helpers);
     assert.doesNotMatch(html, /-2 0 0 0 -2/);