- Navbar: hide Fonctionnement and Flyer QR on mobile (hidden sm:inline),
preventing overflow on small screens
- Home: add mobile tab bar (Proposer / Synthèse) replacing the broken
two-column stacked layout that was constrained to h-[calc(100vh-5rem)]
- Grid: md:h-[calc(100vh-9rem)] (desktop only); columns show/hide via
mobileTab state
- Countdown: visible in synthesis tab label on mobile, in header on md+
- Textarea: 90px min-height on mobile, 120px on sm+
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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