✅ BUILD FIXED: Critical earnings calculation fix with standardized Firebase Admin

🚨 CRITICAL EARNINGS CALCULATION FIX:
- Fixed pendingBalance calculation to use current allocations instead of stale stored data
- establishmentdisliker will see .65 in earnings header (instead of /bin/bash.00)
- Enhanced browser cache-busting with no-store headers and timestamps

🔧 FIREBASE ADMIN STANDARDIZATION:
- Completely rewrote firebaseAdmin.ts to be independent of old admin.ts
- Fixed all remaining endpoints to use standardized getFirebaseAdmin()
- Updated import paths from utils/auth to auth-helper for consistency
- Fixed batch operations, append-reference, set-current-version endpoints

🚀 PWA SIGN-IN BUTTON FIX:
- Fixed mobile sign-in button onClick handler (asChild prop issue)
- Added analytics tracking for mobile sign-in clicks

✅ BUILD STATUS:
- Local build test passes successfully (271 pages generated) ✅
- All Firebase Admin initialization errors resolved ✅
- No more 'firebaseApp.getOrInitService is not a function' errors ✅
- Production deployment ready ✅

This ensures earnings display matches actual allocation data and fixes all build errors.

Author: sirjamesgray

app/api/pages/[id]/set-current-version/route.ts

@@ -1,6 +1,6 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { getFirebaseAdmin } from '../../../../firebase/firebaseAdmin';
-import { getUserIdFromRequest } from '../../../../utils/auth';
+import { getUserIdFromRequest } from '../../../auth-helper';
 import { getCollectionName } from '../../../../utils/environmentConfig';
 import { createErrorResponse, createSuccessResponse } from '../../../../utils/apiHelpers';
 

app/firebase/firebaseAdmin.ts

@@ -1,16 +1,45 @@
 import * as admin from 'firebase-admin';
-import { initAdmin } from './admin';
 
-// COMPATIBILITY LAYER: Use the same Firebase Admin instance as admin.ts
-// This ensures both systems share the same initialized instance
+let firebaseAdminInstance: typeof admin | null = null;
+
 export function getFirebaseAdmin(): typeof admin | null {
+  if (firebaseAdminInstance) {
+    return firebaseAdminInstance;
+  }
+
   try {
-    // Use the initAdmin function from admin.ts to ensure consistency
-    const adminInstance = initAdmin();
-    // Firebase Admin instance retrieved successfully
-    return adminInstance;
+    // Check if Firebase Admin is already initialized
+    if (admin.apps.length > 0) {
+      firebaseAdminInstance = admin;
+      return firebaseAdminInstance;
+    }
+
+    // Initialize Firebase Admin
+    const base64Json = process.env.GOOGLE_CLOUD_KEY_JSON || '';
+    if (!base64Json) {
+      console.warn('[Firebase Admin] No GOOGLE_CLOUD_KEY_JSON found, skipping initialization');
+      return null;
+    }
+
+    console.log('Decoded base64-encoded GOOGLE_CLOUD_KEY_JSON');
+    const decodedJson = Buffer.from(base64Json, 'base64').toString('utf-8');
+    const serviceAccount = JSON.parse(decodedJson);
+    console.log(`Using service account from GOOGLE_CLOUD_KEY_JSON: ${serviceAccount.client_email}`);
+
+    admin.initializeApp({
+      credential: admin.credential.cert({
+        projectId: serviceAccount.project_id || process.env.NEXT_PUBLIC_FIREBASE_PID,
+        clientEmail: serviceAccount.client_email,
+        privateKey: serviceAccount.private_key?.replace(/\\n/g, '\n')
+      }),
+      databaseURL: process.env.NEXT_PUBLIC_FIREBASE_DATABASE_URL || 'https://wewrite-ccd82-default-rtdb.firebaseio.com'
+    });
+
+    firebaseAdminInstance = admin;
+    console.log('Firebase Admin initialized successfully');
+    return firebaseAdminInstance;
   } catch (error) {
-    console.error('[Firebase Admin] Failed to get shared Firebase Admin instance:', error);
+    console.error('[Firebase Admin] Failed to initialize Firebase Admin:', error);
     return null;
   }
 }