feat: Add bottom tab bar for mobile navigation (Phase 1)

[marcodejongh]

Add a persistent bottom tab bar with Climbs, Search, and New tabs
that replaces mobile-specific buttons previously in the header.
Search opens a right drawer with filters, New opens a bottom drawer
with Create Climb and My Playlists options. The tab bar is hidden
on desktop (>=768px) where sidebar handles these functions.

• New BottomTabBar component with iOS safe area support
• New CreateDrawer component for create/playlist actions
• Remove mobile SearchButton from header (moved to tab bar)
• Remove Create Climb from mobile meatball menu (moved to tab bar)
• Mark Phase 1 as done in redesign plan

https://claude.ai/code/session_01ReTs4AchTet4cCNkUDsgm1

[vercel]

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Project	Deployment	Actions	Updated (UTC)
boardsesh	Building	Preview, Comment	Feb 6, 2026 0:19am

[claude]

Claude Review

✅ Ready to merge - Minor issues noted below, but nothing blocking.

Issues

1. Duplicate playlists functionality - header.tsx:157-161 still includes "My Playlists" in the mobile meatball menu, but create-drawer.tsx also adds "My Playlists". This creates duplicate menu entries for mobile users.

2. Hardcoded color value - bottom-tab-bar.module.css:7 uses background: #fff and border-top: 1px solid #E5E7EB instead of referencing design tokens or CSS variables. Per CLAUDE.md, design tokens should be used.

3. Incomplete test checklist - docs/spotify-ui-redesign-plan.md marks Phase 1 as complete but several items are still unchecked:

   • "Home tab navigates to /list when feature flag is off"
   • "Home tab navigates to /home when NEXT_PUBLIC_ENABLE_HOME_SCREEN=true"
   • "Tab bar does not overlap QueueControlBar"
   • "Content area scrolling is not blocked by tab bar"
   • "Tab bar shows on play/view pages, hides on create page"

4. Missing Search badge indicator - The original search-button.tsx shows a badge with result count when filters are active. The new bottom tab bar Search button has no such indicator, reducing discoverability of active filters.