[ditto-m]

Problem

• AuthGate always performs its default identity lookup, preventing applications from selecting an authenticated account explicitly.

Approach

• Accept identity options and an error fallback; distinguish failed lookups from explicit anonymous results while preserving default consumers.
• Release 0.50.0 with a keyed account-switch example and scoped UserMenu composition instead of an application-local gate.

Review notes

• Late previous-account responses remain outside the selected account subtree; tests cover the request boundary and enabled-redirect error behavior.

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