Byron GamatosandGitHub e14ef64224
ship-ci / ci (push) Waiting to run
fix(playback): the song queue must survive a playSong wrapper that drops options (#977)
Tester: "Passports does not advance in the song queue."

The play queue tells playSong "don't clear the queue I'm driving" by passing
options.fromQueue. But window.playSong is wrapped by a CHAIN of plugins —
nam_tone, midi_amp, fretboard, invert_highway, tabview — and each wrapper
forwards only (filename, arrangement), silently dropping the options object. So
fromQueue never reached playSong: it cleared the queue the instant its first
song started, and a gig/album/playlist never advanced.

Reproduced on the real build via a queue.start + a hooked clear(): the queue
went inactive with 0 remaining immediately after start, and the clear stack ran
through nam_tone -> midi_amp -> invert_highway -> fretboard -> session.js.

Fixing six plugin wrappers is whack-a-mole and the next plugin re-breaks it.
Fix it at the source instead: the queue raises an out-of-band flag
(_consumeInternalPlay, one-shot) beside the wrapper chain, not through it, and
playSong's clear-guard honours it. options.fromQueue stays as the in-band path.
The flag is consumed on read so a later MANUAL play still abandons the queue.

Verified on the real build: the gig queue stays active after start and advances
on song:ended (Iron Maiden -> Blind Guardian), and a manual play still clears.

Tests drive the real clear-guard against the queue for: a dropped-options
wrapper (the bug), the one-shot manual-play-still-clears invariant, and the
in-band fromQueue path on its own. All 3 fail on the pre-fix source. JS 1211/1211.
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