Enhance layout: sidebar and mobile menu

[christiangruender]

Summary

This PR improves the layout system with a sidebar navigation that is only visible when needed and an improved mobile experience.

Sidebar Concept

• Focused sidebar on wallet context (removed general navigation links)
• Sidebar now only appears in wallet-specific views

Sidebar UI

• Enhanced menu organization with section header
• Moved wallet dropdown selector to sidebar
• Added "New Wallet" action directly in dropdown
• Added text truncation for long wallet names
• Standardized icon sizes
• Consistent text sizing

Mobile Navigation

• Custom overlay implementation
• Improved interaction handling
• Smooth slide-in/out animations

Header

• Optimized logo size for better visual balance
• Simplified header structure

Theme Support

• Enhanced dark/light mode support (clearer layout lines in light mode)

Changed Files

1. layout.tsx - 148 lines changed (+34, -114)
2. multisig-wallet.tsx - 159 lines changed (+115, -44)
3. mobile-navigation.tsx - 153 lines changed (+88, -65)
4. wallet-nav-link.tsx - 30 lines changed (+13, -17)
5. sheet.tsx - 5 lines changed (+3, -2)
6. logo.tsx - 2 lines changed (+1, -1)
7. menu-link.tsx - 2 lines changed (+1, -1)
8. dropdown-menu.tsx - 2 lines changed (+1, -1)

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Project	Deployment	Preview	Comments	Updated (UTC)
multisig	Ready	Preview	Comment	Nov 9, 2025 9:46pm

[QSchlegel]

Looks good.