feat(studio): field-level conditional-required, help text & min length

[xuyushun441-sys]

Summary

First half of the deferred Tier-2 trio — the field-level conditional & validation props, adapted to what the object FieldSchema actually persists.

Added to the object field inspector (all confirmed on @objectstack/spec FieldSchema):

• conditionalRequired (CEL) — the field becomes required when the predicate is true. Shown for every field type (Advanced section), with a help line.
• inlineHelpText — end-user help shown below the field on a form.
• minLength — paired with the existing max length for text-like types.

Model note (why not "conditional visibility")

FieldSchema has no field-level conditional visibility — hidden is a plain boolean, and conditional display is a view/form concern (visibleOn lives on view fields, not object fields). So per the design discussion, this PR delivers the supported conditionalRequired instead, and field-level visibility is intentionally left to the view designer. (inlineHelpText turned out to exist after all — earlier missed because it's on the spec package, not designer.ts.)

Tests

+5 RTL cases (help text / minLength / conditionalRequired commit, conditional-required shown for non-text types, read-only disables). Inspector suite at 12; tsc clean; 0 lint errors.

Next

PR B (separate): bulk multi-select of fields with bulk delete / move-to-group — the third trio item.

🤖 Generated with Claude Code

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
objectui	Ignored		Jun 1, 2026 10:22pm

[github-actions]

✅ Console Performance Budget

Metric	Value	Budget
Main entry (gzip)	271.4 KB	350 KB
Entry file	index-ByxGuDiu.js	—
Status	PASS	—

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📦 Bundle Size Report

Package	Size	Gzipped
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auth (authStyles.js)	5.04KB	1.72KB
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Size Limits

• ✅ Core packages should be < 50KB gzipped
• ✅ Component packages should be < 100KB gzipped
• ⚠️ Plugin packages should be < 150KB gzipped