Admin #338 — Market Experience v2: Global is content every market receives, not a market of its own

The foundation the rest of the market work sits on. Treating Global as a third bucket alongside NA and EU was the single cause of the empty market view, the header disagreeing with the market count, and curators being unable to find posts associates could plainly see. **Test (Tier 3, indirect):** verified through #340, #344, #350, #354 and #356. A market view should return All Markets content plus that market, never that market alone.