wiki v0.2: CYD/TTGO/headless board pages, Boards+Chargers split, media, YouTube badge - New/updated board pages (CYD, TTGO, headless) + Boards side-by-side matrix; split the old Supported-chargers-and-boards into Chargers + Boards. - Copy/accuracy fixes across pages (on-screen phase, RECOND, RGB, HA entity counts). - Media: cyd-photo, cyd/ttgo screen-cycle gifs, charger-hookup diagrams; demo-hero refreshed. YouTube channel badge on Home.