`open_in_browser` gated its xdg-open path on `target_os = "linux"`, which is
false on Android — that is its own target_os. Android therefore took the
fallback arm, which discarded the URL and returned `Ok(())`.
Login Flow v2 cannot complete without a browser: the user approves the
sign-in there and `auth::poll` waits for that approval. Claiming success meant
the UI showed "Approve the sign-in in your browser" with no browser open, the
poll waited for an approval that could never arrive, and the worker eventually
dropped its channel — surfacing as "sign-in failed unexpectedly", which
pointed at the network rather than at the real cause. The server had in fact
been contacted successfully.
Gate on `unix && !android && !macos` so the arm matches what xdg-open actually
implies, and return Unsupported from the fallback. The caller treats it as
terminal rather than swallowing it with `let _ =`.
Android gets a real Intent-based launcher in the next commit; until then the
failure is at least honest about what happened.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
dtourolleandClaude Opus 5
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