* fix(tabs): keep widths stable during title updates
* review(tabs): reduce the width rule to the definite width and harden its tests
Why: once the tab container has a definite width the shrink-wrapped strip never
has free space, so flex-grow and max-w-[280px] were unreachable and only
duplicated the 180/220 numbers across two properties. Measured widths, strip
scrollWidth and clientWidth are identical to the flex-based version across four
window widths, five tab counts and short/long titles.
Tests: pin the width classes literally so the guarantee cannot be edited away
via the constant, and guard the e2e check against passing vacuously on a
saturated strip.
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Co-authored-by: Brennan Benson <79079362+brennanb2025@users.noreply.github.com>
Fixes the current release E2E flakes by restoring dashboard agent row title attributes for prompt-based locators, making the crowded tab rename test dispatch the rename event deterministically, and hardening the Russian-layout terminal shortcut test against Linux CI PTY startup races.
bokjkandBrennan Benson
Neil
