feat: add news command to fetch AI-curated headlines

Add comprehensive news/trending feature that fetches AI-generated news
headlines from Twitter's "For You" page. This feature specifically
targets the AI-curated news items that Twitter displays under "Today's
News" section, not generic trending hashtags.

- Uses Twitter's ExplorePage GraphQL API endpoint to access the Explore
  page timeline data where AI headlines are located
- AI headlines are identified by the explicit `is_ai_trend: true` flag
  in the API response
- Fallback heuristic detection for full-sentence headlines (5+ words)
  with "News" or time indicators in social context
- Headlines are found in "stories-*" modules within the initialTimeline
  structure under a "Today's News" header
- Follows the existing mixin pattern (withNews) for composability
- Supports both AI-only filtering and mixed trending/AI results

- `bird news` - Fetch news and trending topics (mixed results)
- `bird news --ai-only` - Fetch ONLY AI-curated headlines
- `bird news -n <count>` - Limit number of results
- `bird news --json` - Output as JSON
- `bird news --json-full` - Include raw API response
- `bird news --with-tweets` - Enrich with related tweets
- `bird trending` - Alias for news command
- AI headlines are clearly marked with "AI · " category prefix
- Automatic deduplication of duplicate headlines
- Rich formatting with category, time, post count, and URLs

- src/commands/news.ts - CLI command implementation
- src/lib/twitter-client-news.ts - Core news fetching functionality
- tests/commands.news.test.ts - Command validation tests (7 tests)
- tests/twitter-client-coverage.news.test.ts - API coverage tests (7 tests)

- README.md - Added documentation for news command
- src/cli/program.ts - Registered news command
- src/lib/index.ts - Exported news-related types
- src/lib/twitter-client.ts - Integrated withNews mixin
- src/lib/query-ids.json - Added ExplorePage query ID
- src/lib/twitter-client-constants.ts - Added ExplorePage constant
- src/lib/twitter-client-features.ts - Added buildExploreFeatures()
- scripts/update-query-ids.ts - Added ExplorePage to update script

- All 268 existing tests continue to pass
- Added 14 new tests covering command validation and API functionality
- Tested with real Twitter data confirming AI headline detection
- All TypeScript compilation and linting checks pass

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

src/lib/twitter-client-features.ts

@@ -313,3 +313,47 @@ export function buildFollowingFeatures(): Record<string, boolean> {
     responsive_web_enhance_cards_enabled: false,
   });
 }
+
+export function buildExploreFeatures(): Record<string, boolean> {
+  return applyFeatureOverrides('explore', {
+    rweb_video_screen_enabled: true,
+    profile_label_improvements_pcf_label_in_post_enabled: true,
+    responsive_web_profile_redirect_enabled: true,
+    rweb_tipjar_consumption_enabled: true,
+    verified_phone_label_enabled: false,
+    creator_subscriptions_tweet_preview_api_enabled: true,
+    responsive_web_graphql_timeline_navigation_enabled: true,
+    responsive_web_graphql_exclude_directive_enabled: true,
+    responsive_web_graphql_skip_user_profile_image_extensions_enabled: false,
+    premium_content_api_read_enabled: false,
+    communities_web_enable_tweet_community_results_fetch: true,
+    c9s_tweet_anatomy_moderator_badge_enabled: true,
+    responsive_web_grok_analyze_button_fetch_trends_enabled: true,
+    responsive_web_grok_analyze_post_followups_enabled: true,
+    responsive_web_grok_annotations_enabled: true,
+    responsive_web_jetfuel_frame: true,
+    responsive_web_grok_share_attachment_enabled: true,
+    articles_preview_enabled: true,
+    responsive_web_edit_tweet_api_enabled: true,
+    graphql_is_translatable_rweb_tweet_is_translatable_enabled: true,
+    view_counts_everywhere_api_enabled: true,
+    longform_notetweets_consumption_enabled: true,
+    responsive_web_twitter_article_tweet_consumption_enabled: true,
+    tweet_awards_web_tipping_enabled: false,
+    responsive_web_grok_show_grok_translated_post: true,
+    responsive_web_grok_analysis_button_from_backend: true,
+    creator_subscriptions_quote_tweet_preview_enabled: false,
+    freedom_of_speech_not_reach_fetch_enabled: true,
+    standardized_nudges_misinfo: true,
+    tweet_with_visibility_results_prefer_gql_limited_actions_policy_enabled: true,
+    longform_notetweets_rich_text_read_enabled: true,
+    longform_notetweets_inline_media_enabled: true,
+    responsive_web_grok_image_annotation_enabled: true,
+    responsive_web_grok_imagine_annotation_enabled: true,
+    responsive_web_grok_community_note_auto_translation_is_enabled: true,
+    responsive_web_enhance_cards_enabled: false,
+    // Additional features required for ExploreSidebar
+    post_ctas_fetch_enabled: true,
+    rweb_video_timestamps_enabled: true,
+  });
+}