add push settings

apps/frontend/lib/firebase-config.ts

@@ -0,0 +1,32 @@
+export interface FirebasePublicConfig {
+  enabled: boolean;
+  projectId: string;
+  apiKey: string;
+  appId: string;
+  messagingSenderId: string;
+  vapidKey: string;
+}
+
+export function parseFirebasePublicConfig(settings: Record<string, string>): FirebasePublicConfig | null {
+  const enabled = ['true', '1', 'yes'].includes((settings.FIREBASE_PUSH_ENABLED ?? '').trim().toLowerCase());
+  if (!enabled) return null;
+
+  const projectId = settings.FIREBASE_PROJECT_ID?.trim() ?? '';
+  const apiKey = settings.FIREBASE_WEB_API_KEY?.trim() ?? '';
+  const appId = settings.FIREBASE_WEB_APP_ID?.trim() ?? '';
+  const messagingSenderId = settings.FIREBASE_WEB_MESSAGING_SENDER_ID?.trim() ?? '';
+  const vapidKey = settings.FIREBASE_WEB_VAPID_KEY?.trim() ?? '';
+
+  if (!projectId || !apiKey || !appId || !messagingSenderId || !vapidKey) {
+    return null;
+  }
+
+  return {
+    enabled: true,
+    projectId,
+    apiKey,
+    appId,
+    messagingSenderId,
+    vapidKey
+  };
+}