Fix seed zeroization on error paths, zombie process, and dead code

Fix security and code quality issues from codebase analysis

Add swap confirmation sheet + fix transaction history

Fix double Face ID prompt on swap signing

Polish swap quote details and error messages

Fix 0x v2 input invalid — v2 only supports sellAmount

Migrate 0x swap API from deprecated v1 to v2

Fix swap quote silently failing — stale 0x cert pins + error swallowed

Fix loading overlay white-on-white, fix native token swap addresses

Rename Get Quote to Swap, remove auto-quote on keystroke

Fix swap: auto-update opposite amount using token prices

Regenerate xcodeproj + fix closure type annotation

Add chain toggle feature — let users disable blockchains

Fix single Face ID unlock, add password toggle, greeting header

Fix balance not loading after Face ID unlock