FE-850: use ds form field in petrinaut

[alex-e-leon]

🌟 What is the purpose of this PR?

• Switch Petrinaut to use Form.Field, Form.Row and Form.Section components
• Adds inline layout to Form.Field
• Adds align prop to HelpTooltip

Pre-Merge Checklist 🚀

🚢 Has this modified a publishable library?

This PR:

• does not modify any publishable blocks or libraries, or modifications do not need publishing

📜 Does this require a change to the docs?

The changes in this PR:

• are internal and do not require a docs change

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Project	Deployment	Actions	Updated (UTC)
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petrinaut	Ready	Preview	Aug 13, 2026 1:51pm

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PR Summary

Medium Risk
Large UI refactor across many Petrinaut panels and publishable ds-components API changes (inline layout, labelActions type); behavior/regression risk is mostly visual and form accessibility rather than backend logic.

Overview
Extends the design-system Form primitives so Petrinaut can use shared labels, errors, and aligned property panels instead of ad hoc Section + manual labels.

Form.Field gains layout="inline" with optional inputAlign (start/end), subgrid-friendly styling when nested in Form.Section, and labelActions as a single node (inline actions sit beside the control). Inline as="legend" fields get aria-labelledby handling so tooltips/actions stay out of the accessible name. Form.Section is new—a three-column grid so adjacent inline fields share label/input tracks.

Smaller DS tweaks: Button.testId, HelpTooltip.align, tooltip open/close animations, and expanded Form Ladle stories (inline, section, TanStack checkbox/radio fields).

Petrinaut replaces custom field chrome across properties panels, DraftFieldInput, and simulate drawers (scenarios, metrics, experiments, optimizations) with Form.Field / Form.Row / Form.Section, routing validation and footer errors through Form.Field.Errors where applicable.

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