E2E: Re-enable mobile reply via tap (@wip cluster F)

[mjkatgithub]

Planning

• Milestone: Phase 3
• Priority: P0
• Size: XS
• Estimate: 1 SP
• Epic: Re-enable @wip chat E2E scenarios quarantined for green CI lane #134

Goal

Re-enable the @wip mobile reply scenario by scoping Playwright hasTouch
to a dedicated mobile context/page only. A global hasTouch broke desktop
hover-action clicks (see #134).

Scope

• Reply via tap on mobile viewport in tests/e2e/features/chat.feature
• Remove @wip when green

Branch

bug/e2e-wip-mobile-reply

Acceptance criteria

• Mobile reply scenario passes without @wip.
• Desktop reply/hover scenarios still pass (no global hasTouch).

Test checklist

E2E

• Targeted chat.feature mobile scenario
• Desktop reply regression (Reply composer and fallback rendering)

Notes

Suggested first sub-issue of #134 (test-only). Docs: N/A — test-only.

Shipped: per-scenario browser.newContext({ hasTouch: true }) for @mobile
tags in hooks.mjs; @wip removed from mobile reply scenario.