fix: add generic cross-map fields (core_keywords, viral_hashtags, strategy_tips, content_titles) to all platform response models so they survive FastAPI's response_model filter

feat: Add LinkedIn API posting + enhanced analyzer + schema

feat: Multi-platform batch generation + simple UI

feat: Add Grammar Correction API v2.1.0

feat: Add multi-platform social media analysis with 7 platform-specific endpoints

Extend output: 10 keywords/hashtags + add Content Titles

Upgrade to Mistral-7B Serverless API for high intelligence

Fix schema validation: Remove relevance field

Initial commit of SEO Analyzer FastAPI