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

Side B is a small, targeted bugfix that centralizes hostname/base-URL resolution (new util.get-base-url, window.location.origin fallback) across multiple OAuth callback modules and fixes CI deploy triggers—correcting real deployment/redirect bugs for custom hosts. Side A is a large rewrite/simplification of a parser feature (replacing a complex but working autocomplete graph with a simpler paste-and-go form) which is reasonable but removes substantial tested functionality and a Playwright race test without clear evidence the removed behavior was net negative; it's more of a design pivot than a fix, with less certain lasting value than B's cross-cutting correctness fix.