~anthropic/claude-sonnet-latest → B (4:1)

Side B implements a substantial, well-tested feature: an async Reddit fetch worker with OAuth token management, rate-limit/backoff handling, JSON parsing for subreddits/posts, and integration into AppState/routes, including unit tests for URL mapping and JSON parsing. Side A mostly removes an existing theme feature and refactors URL routing (/?item= to /~/...), which is a reasonable but comparatively minor and partly destructive change (deleting theme CSS/cookie logic) with less enduring functional value.