* fix(sidebar): hoist _sessionAttentionState to top-level scope (#3696)
_sessionAttentionState was declared inside renderSessionListFromCache() and
relied on function hoisting, but the top-level function _sidebarRowHasVisible
Messages (reached via renderSessionListFromCache -> _partitionSidebarSessionRows)
called it bare. Hoisting is scoped to the enclosing function, so every sidebar
cache-render threw 'ReferenceError: _sessionAttentionState is not defined' and
the session list went blank. Regressed in #3672 (v0.51.269) when _sidebarRow
HasVisibleMessages was extracted to top level.
Fix: move _sessionAttentionState to top-level scope (it is pure — only uses its
arg plus the i18n global t), so both the visibility predicate and the nested
per-row renderer can reach it.
Prevention (the durable half): add scripts/scope_undef_gate.py — models the
classic-<script> shared global scope (union of all static files' top-level
symbols) and runs ESLint no-undef per file, flagging a function defined nested
but called from a sibling scope. Wired into CI (.github/workflows/tests.yml lint
job) alongside the existing no-const-assign runtime gate, plus an in-suite test
(test_static_js_scope_undef.py) and a focused structural regression test
(test_issue3696_session_attention_scope.py). RED/GREEN-validated against the
broken tree.
* fix(streaming): thread source param into stale-stream bailout; tighten scope gate
Opus review of #3698 found the new scope_undef_gate's 'source' allowlist entry
was masking a real same-class bug: _bailOutOfTerminalEventsFromStaleStream
(declared inside attachLiveStream, params activeSid/streamId/uploaded/options)
called _closeSource(source) against a 'source' not in its lexical scope. All 5
call sites are inside _wireSSE(source), but JS scope is lexical not dynamic, so
the helper would throw ReferenceError: source is not defined on the stale-stream
terminal-event path (user back in an active session whose old stream finalizes
late).
Fix: thread source as an explicit parameter (declaration + all 5 call sites),
the same make-the-dependency-explicit fix as #3696 — and REMOVE the 'source'
allowlist entry so the gate stays gated against that name (it now passes because
the bug is fixed, not because it's allowlisted). Added the documented
false-negative classes from Opus's review to the gate docstring (name-collision
shadowing, destructuring-regex gap, exposure escape hatches, name-keyed
allowlist) and a focused regression test.
This is the prevention gate catching a real latent bug on its first outing.
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Co-authored-by: nesquena-hermes <nesquena-hermes@users.noreply.github.com>
da5bf69aee
