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9e9e33ae68
Login sat at cognitive complexity 27, over the 25 the linter allows. Extract the interactive SSO branch into startSSOLogin, and split the nested in-flight-flow reuse check out of it into reuseOAuthFlow, which flattens the original if/else into early returns: it returns the cached auth info when the previous flow targets the same client and still has more than 90s left, otherwise cancels the stale wait and returns nil so the caller requests a fresh flow. The helpers take the contextState through a small statusSetter interface, since internal.contextState is unexported and re-deriving it with CtxGetState inside the helper would resolve against callerCtx rather than rootCtx. No behavior change: same ordering of state transitions, same mutex scope around the oauthAuthFlow write, same error paths. Login is now at 21.