Sprint 11: Freunde & Chat + Phosphor-Icon-Vollmigration

- Freundschaften (pending/accepted), Nutzersuche, Anfragen per Push
- Direktnachrichten mit Polling, iMessage-Stil, Deep-Links aus Push
- Alle Seiten (map, places, diary, health, dog-profile, sitting, knigge,
  forum, wiki, walks) vollständig auf Phosphor-Icons migriert
- Wikidata-Rassen-Scraper (~833 neue Rassen, lokal gespiegelte Fotos)
- TheDogAPI lokal gespiegelt (169 Rassen + Fotos)
- Quiz-Result-Cards horizontal (korrekte Bildproportionen)
- SW by-v89

backend/static/sw.js

@@ -3,7 +3,7 @@
    Offline-Cache + Push Notifications + Tile-Cache
    ============================================================ */
 
-const CACHE_VERSION = 'by-v62';
+const CACHE_VERSION = 'by-v89';
 const CACHE_STATIC  = `${CACHE_VERSION}-static`;
 const CACHE_TILES   = 'ban-yaro-tiles-v1';  // bleibt über SW-Updates erhalten
 
@@ -12,6 +12,7 @@ const STATIC_ASSETS = [
   '/css/design-system.css',
   '/css/layout.css',
   '/css/components.css',
+  '/icons/phosphor.svg',
   '/js/api.js',
   '/js/ui.js',
   '/js/app.js',
@@ -192,6 +193,22 @@ self.addEventListener('push', event => {
     requireInteraction: data.requireInteraction || false,
   };
 
+  // Chat-Nachricht
+  if (data.type === 'chat_message') {
+    options.tag  = data.tag || `chat-${data.data?.conversation_id}`;
+    options.renotify = true;
+    options.actions  = [
+      { action: 'reply', title: 'Antworten' },
+      { action: 'dismiss', title: 'Schließen' },
+    ];
+  }
+
+  // Freundschaftsanfrage
+  if (data.type === 'friend_request') {
+    options.tag     = 'friend-request';
+    options.actions = [{ action: 'view', title: 'Anzeigen' }];
+  }
+
   // Giftköder-Alarm: besondere Darstellung
   if (data.type === 'poison_alert') {
     options.tag               = 'poison-alert';
@@ -219,9 +236,10 @@ self.addEventListener('notificationclick', event => {
 
   let url = '/';
 
-  if (action === 'view' || data?.page) {
+  if (action === 'view' || action === 'reply' || data?.page) {
     url = `/#${data.page || 'poison'}`;
-    if (data.id) url += `?id=${data.id}`;
+    if (data.conversation_id) url += `?conversation_id=${data.conversation_id}`;
+    else if (data.id) url += `?id=${data.id}`;
   }
 
   event.waitUntil(