~anthropic/claude-sonnet-latest → A (6:4)

Commit A adds substantial new functionality: a real background Reddit fetch worker with OAuth, rate-limit handling, backoff, JSON parsing for subreddits/posts, and integration into the tree/state, plus tests for URL mapping and parsing. Commit B simplifies the UI by ripping out a large complex (but working, tested) autocomplete graph and replacing it with a simpler paste-and-go parser, which is reasonable cleanup but net removes more functionality/tests than it adds, and its 'value' is largely subtractive/simplifying rather than building new capability.