FA-21883 / Autocomplete interactions / Member archive

Composition-aware suggestion lifecycle: final display duplicates the committed preedit · case 03

The display-end completion transition produces an incorrect observable state.

Member previewVariant 3 · 3 implementations · 22 checks per implementation

Case contract

During IME composition, preedit is visible but never searched or committed. Starting composition saves the query snapshot; cancellation restores it; finalization schedules one final query. Candidate acceptance belongs to the IME, and result visibility is suspended until final text is available.

Why this case matters

Autocomplete couples draft text, suggestion identity and asynchronous presentation; this bounded lifecycle model isolates one observable interaction defect.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
normal display-end	`"\u732b\u732b\u54aa"`	`"\u732b\u54aa"`	Failed

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