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Charis Lam cc5548dbe0 refactor(studio): unify snippet save + persistence into SnippetStatus
PR 3 of a stacked refactor. Replaces the two overlapping pieces of snippet
lifecycle state — the savingStates map ('IDLE'|'UPDATING'|'UPDATING_FAILED')
and the isNotSavedInDatabaseYet boolean — with a single SnippetStatus enum.

Save progress and persistence are orthogonal, so the never-persisted 'new'
phase keeps its own saving/failed variants (new, new_saving, new_save_failed)
alongside the persisted ones (saved, unsaved, saving, save_failed). The
wasNeverPersisted() predicate recovers the persistence axis and stays true
across the entire first-save lifecycle, so content-fetching, list
invalidation, and the replication-lag 404 swallow all map faithfully — and a
new snippet's first save keeps its saving/failed indicator.

Status is attached at the data layer so a snippet is never without one:
- SnippetStatus + SnippetWithContent now live in data/content; the snippet
  queries attach status 'saved' via withSavedStatus(), and upsertContent
  returns SnippetWithContent so move/rename responses carry status too.
- A SQL-typed getSqlSnippetById/useSqlSnippetByIdQuery returns
  SnippetWithContent (the generic useContentIdQuery stays for Reports), so
  [id].tsx loads content with no casting.
- 'new' is attached on local creation (createSqlSnippetSkeletonV2).

Dependents import SnippetWithContent/SnippetStatus directly from the data
layer (no state-layer re-exports). 'unsaved' is reserved for manual-save
dirty tracking in a later PR. Pure unit tests for every predicate/transition.
2026-06-23 18:50:55 -04:00
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2025-12-18 07:28:38 +13:00