The zerolag bundle exports only `XtermZerolagInput`, but app.js constructs
`new LocalEchoOverlay(terminal)` directly. scripts/build.mjs appends global
aliases after esbuild (build.mjs:53-66); the first version of this script
omitted that step.
Without them initTerminal() throws `LocalEchoOverlay is not defined` at the
line that builds the overlay — and because that is midway through the function,
EVERY later step silently never runs, including the mobile touch handlers on
#terminalContainer. The page still had a terminal, so the failure looked like a
tap-routing bug rather than a boot error.
Verified: boot errors none, and all four terminalContainer touch listeners
(touchstart/touchmove/touchend/touchcancel) now register.
lior
9fd856a918