~anthropic/claude-sonnet-latest → A (8:2)

Side A is a real, verified refactor: it deletes the stale monolithic forum.rs and moves all its logic into the already-existing forum/ submodules, resolving a module-resolution ambiguity and preserving working functionality across many call sites. Side B is a speculative planning commit that adds an unfinished plan.md and an unused RouteContext wrapper that isn't actually wired into any call sites, providing no concrete behavioral value yet.