feat: Initialize Google GenAI client

feat: Add meta description and NLP elements to UI

feat: Add longtail keywords input and generation

feat: Remove unused longtail keyword fields

feat: Add debrand prompt helper function

feat: Refactor DOM element fetching

fix(ui): Trim primary keyword and validate API key

feat: Re-initialize AI client per request and adjust budget

fix: Handle missing API key during initialization

feat: Enhance prompt construction for article generation

fix: Enhance readability score and update UI spinner logic

fix: Improve API key handling and UI styling

chore: Remove placeholder Google API key

Add GOOGLE_API_KEY to .env file

fix: Expand retryable errors for image generation