1. Hide the project navigation bar (kept in DOM via 'hidden', not deleted)
2. Move the tabs into the panel header where the 'Map' title was
3. (tabs setActiveTab logic already correct — recompiled)
4. Make the phases/layers panel collapsible via an Alpine toggle button
5. Replace all emoji icons with blade-heroicons (<x-heroicon-o-*>)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
javier
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