Convert the remaining 10 data sources (Bucket, Conversation, QuestionThread,
DatePlan, DateMemory, DateReflection, Answer, User, Auth, DateMatch) from
verbose suspendCancellableCoroutine{cont-> ...addOnSuccess/addOnFailure} wrappers
(and the per-file getDoc/voidAwait/queryAwait/refAwait helper duplicates) to the
kotlinx-coroutines-play-services .await() extension. The data layer now has ZERO
Task-callback wrappers.
Per-block review preserved non-trivial semantics: callbackFlow snapshot listeners
and the DateMatch transaction are untouched; failure→null/false best-effort blocks
became runCatching{ ...await() }.getOrNull()/getOrDefault() (e.g. markRevealed,
hasProfile, PlayIntegrity.verifyWithServer); no-signed-in-user guards became
`?: throw`.
Verified live (real Firebase, paired account): auth + Home reads (couple/user/
answer/challenge), daily-question answer WRITE (secure payload + metadata sets),
and the streak update all succeed — no crash, no PERMISSION_DENIED. Unit suite green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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