chore: standardize environment variable name to GEMINI_API_KEY

.env.example

@@ -1,3 +1,7 @@
 # Google Gemini API Key (Required)
 # Get your API key from https://makersuite.google.com/app/apikey
-GOOGLE_GENERATIVE_AI_API_KEY=your_api_key_here
+GEMINI_API_KEY=your_api_key_here
+
+# Unsplash API - Get your free API key at https://unsplash.com/developers
+# Required for AI Theme Generator background images (optional)
+NEXT_PUBLIC_UNSPLASH_ACCESS_KEY=your_unsplash_access_key_here

.github/workflows/ci.yml

@@ -50,7 +50,7 @@ jobs:
         run: npm run build
         env:
           # Provide API key if available, otherwise use dummy for build
-          GOOGLE_GENAI_API_KEY: ${{ secrets.GOOGLE_GENAI_API_KEY }}
+          GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY || 'ci-build-placeholder' }}
 
       # ✅ Step 8: Upload test coverage report
       - name: 📊 Upload coverage report

jest.setup.ts

@@ -1,7 +1,7 @@
 import '@testing-library/jest-dom';
 
 // Mock environment variables
-process.env.GOOGLE_GENAI_API_KEY = 'test-api-key-mock';
+process.env.GEMINI_API_KEY = 'test-api-key-mock';
 
 // Mock next/navigation
 jest.mock('next/navigation', () => ({