Three root causes:
1. Editor.setCode() never dispatched `change` — it pre-set `code = ncode`
before the Monaco edit, so the debounced updateCode() saw code == ncode
and skipped dispatch. The Reset button, copilot accept, and other
setCode callers never triggered schema inference. Fixed by capturing
`changed` before the pre-set and dispatching directly when true.
2. EditableSchemaForm's $effect only tracked the schema reference, not
its properties. Since inferArgs mutates schema in-place through the
Svelte 5 proxy, the reference never changes and the effect never
re-ran. Added schema?.order and Object.keys(schema?.properties ?? {})
reads to detect in-place mutations (matching SchemaForm's pattern).
3. ScriptEditor's $effect depended on both selectedTab and code, causing
a redundant double inferSchema call on every code change (racing with
the on:change handler and initContent's explicit call). Moved code
into untrack() so the effect only fires on tab switches.
Also removed the no-op `testPanelSchema = testPanelSchema` in
inferModuleSchema.
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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