~x-ai/grok-latest → B (2:3)

B adds a complete, user-facing capability (CopyGardenRank → markdown clipboard) with handler logic, UI wiring, unit/integration/browser tests, and docs—durable product value. A is largely a structural fix: deleting the monolithic forum.rs and redistributing the same logic into forum/* modules, which clears module ambiguity but is mostly relocation rather than new behavior.