fix: normalize search_volume (int→str), relevance (float→int), competition (lower→Title), post_count (int→str) for LongCat API responses

fix: add catch-all viral_hashtags mapping at end of cross_map_fields to catch hashtags set by platform-specific mappers

fix: add Pinterest cross-maps for core_keywords, content_titles, hashtags, strategy_tips

fix: handle model returning dict instead of list for tweet_threads/post_drafts/post_ideas/video_concepts

feat: Add LinkedIn API posting + enhanced analyzer + schema

feat: Add LongCat API as primary model with Qwen fallback + cross-map fix

fix: Add Instagram cross-maps for hashtag_sets/captions/content_ideas

fix: Run cross-map after defaults so LLM-sparse responses still get mapped

fix: Add core_keywords and related_phrases cross-mapping from tags/video_titles

fix: Cross-map platform keys to generic keys for frontend template

fix: Add error message when LLM returns list instead of dict

fix: Guard against LLM returning JSON array instead of object

fix: Add missing validate_and_fill_data_defaults function

fix: Catch normalize/validate errors, hide raw JSON parse errors againe

fix: Catch normalize/validate errors, hide raw JSON parse errors

fix: Handle missing correction fields + ResponseValidationError

feat: Add Grammar Correction API v2.1.0

fix: Add normalize_response to handle model output format mismatches

fix: Simplify prompts for 0.5B model reliability + resilient error handling

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