Sub-ticket of MARS-338 PWA install-everywhere (bs-mqw8mww8u4h fleet decision): make Mars installable on Chrome/Edge desktop + Chrome Android (full) + iOS Safari Add-to-Home + macOS Safari Add-to-Dock. Mars is greenfield (zero manifest, zero SW, partial icons). Build the a-d add-list: (a) src/app/manifest.ts — name 'Evolutiva Mars'/short_name 'Mars'/start_url '/'/display standalone/theme+bg from globals tokens/icons 192+512+512-maskable; (b) generate public/icon-192.png, icon-512.png, icon-512-maskable.png from mars-planet.png (maskable ~20% safe-zone pad); (c) layout.tsx metadata appleWebApp{capable,title 'Mars',statusBarStyle} + icons.apple wiring existing 120-180 apple-touch files + viewport export with themeColor; (d) minimal service worker + client registration. a/b/c alone unlock iOS A2HS + macOS Add-to-Dock; a-d unlocks Chrome/Android full install+prompt. Firefox desktop = unfixable non-goal. Clone Pluto's live manifest+sw+icon shape. Reversible, no DB/auth. Audit diff + PTD. · mars