Update all docs to match current multi-tunnel codebase

Fix brew detection + commands for GUI apps launched from Finder

Bump version to 0.1.7, update CHANGELOG

Tray menu: show handshake status per tunnel

Per-tunnel NetworkManager + no-handshake orange dot

Fix multi-tunnel disconnect breaking other tunnels + conflict detection

Fix multi-tunnel GUI: per-tunnel stats, no-handshake warning

Update frontend + tray for multi-tunnel support

Fix all multi-tunnel audit findings

Implement multi-tunnel support (backend)

Add architecture & design documentation

Streamline README: remove defensive tone, reorder sections

Trim tray icon padding for tighter menu bar fit

Fix bypass route race conditions + add Pin Interface toggle

Pin bypass routes to upstream interface with -ifscope