fix: review issues from PRs #5–#12

[ignsm]

Because we all live in AI-era (today is Apr 7 2026), I've added some features using AI in one batch. But of course I don't trust it all and want to review everything, before really release the thing. So, this PR review code across the last 8 PRs to find ai-slop, bugs, dead code, and style guide violations.

Bugs fixed

• useFieldOptions (React): async providers had no .catch() — unhandled rejection on network errors, provider never retried. Added error handling + stale effect cleanup.
• useFieldOptions (Vue): same unhandled rejection issue. Wrapped in try/catch. Replaced deep: true watch with deps-key caching to avoid re-fetching on every keystroke.
• Validation messages: multiselect minLength/maxLength said "characters" instead of "items" for array values. Fixed default messages + updated tests.

Cleanup

• Removed unused @vue/test-utils devDependency (tests use @testing-library/vue).

Style guide compliance

• _dirty → _isDirty in FormEngine
• resolvedPrimaryLabel() → getPrimaryLabel() etc. in Vue FormActions (verb-first)
• showHeader/showHelper → hasHeader/hasHelper in Figma renderer
• Optional chaining in 5 places (schema.fields && schema.fields.length → schema.fields?.length)
• Magic numbers extracted to named constants (DEFAULT_ROWS, LABEL_FONT_SIZE, GROUP_SPACING, ROW_SPACING)

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Project	Deployment	Actions	Updated (UTC)
formhaus	Ready	Preview, Comment	Apr 7, 2026 1:59pm