fix: render bottom nav and user account menu in studio mobile drawer

[Atharv-Shandilya]

• Include bottomNav group (API Keys, Settings) in mobile nav drawer
• Replace static user info with AccountMenu component for full account access on mobile
• Fix setState-in-effect lint errors in portfolio sidebar components

Description

Fixes two mobile navigation gaps in the Studio dashboard.

Bottom nav missing from mobile drawer — mainNav and supportNav were spread into the mobile nav list but bottomNav was omitted entirely, leaving API Keys and Settings unreachable on mobile. Added bottomNav to the spread.

No account actions on mobile — the mobile drawer showed the user's name and email in a static

with no interactivity. Replaced it with the existing AccountMenu component (already used in the desktop sidebar), giving mobile users access to Profile, Billing, Settings, and Logout.

Lint fixes (Portfolio) — three setState-in-effect errors in portfolio sidebar components:

PortfolioAppShell: lazy useState initializer reads localStorage directly, removing the need for an effect
WorkspaceNavigation / WorkspaceThemeControl: replaced useEffect → setMounted(true) with useSyncExternalStore, which returns false on the server and true on the client with no setState call

Linked Issue

#107

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update
• 🧪 Tests (adding or updating tests)

Checklist

• I have read the CONTRIBUTING.md document.
• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.