Charis 7c1ea30e43 refactor(studio): extract useSnippetEditor from MonacoEditor (#47500)
## What

PR 7 of the SQL editor state re-layering stack. Extracts the snippet
editing lifecycle out of `MonacoEditor` into a co-located
`useSnippetEditor` hook, and consolidates the edit debounce.

`useSnippetEditor` owns:
- creating the snippet in the store on first edit and routing to its URL
(replace vs push for a `?content=` deep link)
- writing changes back to the store via `setSql` (with
`wasNeverPersisted` → `shouldInvalidate`)
- seeding the editor from the `content` param
- the read-only determination (`canEditSnippet`)

`MonacoEditor` now consumes `{ snippet, disableEdit, handleEditorChange
}` and keeps only the editor shell + Monaco action wiring. It sheds the
`router`/`profile`/`project`/`params`/store/tabs hooks.

`handleEditorChange` was also flattened with an early return.

## Debounce consolidation

Previously there were **two 1s debounces in series**: `useSnippetEditor`
debounced editor changes before writing to the store, and the save
mechanism (`createSaveMechanism`) already debounces persistence. That
added latency (up to ~2s to save) and split the "when to persist" timing
policy across two layers — at odds with PR 5's design where the
scheduler/mechanism owns *when* and dirty state is meant to be
immediate.

This PR removes the editor-side debounce: edits write to the store
synchronously on every change, and the save mechanism's 1s debounce is
the sole throttle. Net effects:
- the store — and the snippet's dirty status — reflects the latest edit
immediately (correct for the future manual-save mode's Save button / nav
guard)
- save fires ~1s after the *last* keystroke instead of up to ~2s
- only the active snippet's own reactive consumers (a lightweight
sidebar item) re-render per keystroke; Monaco is uncontrolled
(`defaultValue`) so it is unaffected

Note: the double-debounce was legacy (the pre-refactor god store had the
same `useDebounce(value, 1000)` in MonacoEditor plus a debounced
module-load subscribe).

## Notes

- Behavior-preserving in outcome — autosave still lands ~1s after typing
stops, just with lower latency and immediate store consistency.

## Validation

- `pnpm --filter studio typecheck` ✅
- `pnpm exec vitest --run state/sql-editor/` ✅ (110 passed)
- lint ✅ (0 errors; no ratcheted-rule regressions)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* SQL editor changes now apply immediately, with unsaved status
reflected as soon as you edit.
* The editor now keeps the latest snippet details available for saving,
improving reliability when using “Save Query.”

* **Bug Fixes**
* Improved handling for creating and opening snippets from shared links
or prefilled content.
* Fixed status updates so saved snippets correctly switch to unsaved
after edits.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-07-01 15:59:15 -04:00
2026-07-01 13:11:46 +02:00
2025-06-17 11:08:46 +02:00
2026-06-30 14:03:40 +02:00
2024-01-10 13:34:41 +01:00
2021-07-25 12:45:26 +08:00

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