fix(pwa): version icon filenames to -v3 and bust iOS Safari WebClip cache

skills/datastore/assets/mila.webmanifest

@@ -11,31 +11,31 @@
   "theme_color": "#090A0F",
   "icons": [
     {
-      "src": "/family/mila-icon-192.png",
+      "src": "/family/mila-icon-192-v3.png",
       "sizes": "192x192",
       "type": "image/png",
       "purpose": "any"
     },
     {
-      "src": "/family/mila-icon-192.png",
+      "src": "/family/mila-icon-192-v3.png",
       "sizes": "192x192",
       "type": "image/png",
       "purpose": "maskable"
     },
     {
-      "src": "/family/mila-icon-512.png",
+      "src": "/family/mila-icon-512-v3.png",
       "sizes": "512x512",
       "type": "image/png",
       "purpose": "any"
     },
     {
-      "src": "/family/mila-icon-512.png",
+      "src": "/family/mila-icon-512-v3.png",
       "sizes": "512x512",
       "type": "image/png",
       "purpose": "maskable"
     },
     {
-      "src": "/family/mila-apple-touch-icon.png",
+      "src": "/family/mila-apple-touch-icon-v3.png",
       "sizes": "180x180",
       "type": "image/png"
     },

skills/datastore/assets/sw.js

@@ -1,5 +1,5 @@
 // Minimal service worker for Family PWAs (Mila & Moritz) with instant cache-bypassing navigation
-const CACHE_NAME = 'family-pwa-v2';
+const CACHE_NAME = 'family-pwa-v3';
 
 self.addEventListener('install', (event) => {
   self.skipWaiting();