feat: replace Jinja2 template with React SPA (Vite + React 18)

fix: extract dates from article pages via trafilatura instead of homepage HTML

a try

a try

Reformat SPONSOR_INFO, add owner_wikis, update templates/webapp

Add alive animations, PressBook Dark theme, sponsor modal, MBFC bias/factuality system

Add sourcing penalty: negative points for articles that source from other reporting

Add sponsor modal per article with Wikipedia link, remove standalone sponsors page

Add MBFC bias/factuality badges

Rich sponsor ownership: shareholders, types, ownership chains

Add sponsors page + /api/v1/sponsors endpoint

Add sponsor recognition for all 42 news sources

Fix: use /tmp for cache file (app user can't write /app)

Fix: run startup refresh in WSGI mode

Deploy NewsApp