feat: add Apple brand icon (iPhone, iPad, MacBook, iMac, macOS, iOS…)

Uses siApple with hex override #555555 (visible on both light and dark
themes — Apple's brand color #000000 is invisible on dark backgrounds).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/brandIcons.js

@@ -8,6 +8,7 @@ import {
   siBitwarden, siVaultwarden, si1password, siKeepassxc, siVault,
   siMariadb,
   siKubernetes,
+  siApple,
   siDebian, siUbuntu,
   siAnsible,
   siDell, siHp,
@@ -122,6 +123,9 @@ const BRANDS = [
   // Orchestration
   { kw: ['kubernetes', 'k8s', 'kubectl', 'k3s'],          icon: siKubernetes },
 
+  // Écosystème Apple
+  { kw: ['apple', 'iphone', 'ipad', 'ipados', 'macbook', 'imac', 'mac mini', 'mac pro', 'mac studio', 'macos', 'mac os', 'ios', 'icloud', 'airpods', 'airdrop'], icon: { ...siApple, hex: '555555' } },
+
   // OS / distros
   { kw: ['debian'],                                       icon: siDebian },
   { kw: ['ubuntu'],                                       icon: siUbuntu },