feat(editor): add inspector components and section renderers

[joaopcm]

Summary

• Ports 9 inspector components (prop-row, section, text-input, number-input, border-picker, border-radius-picker, padding-picker, style-panel, property-groups)
• Ports 10 section renderers (background, border, padding, size, text, text-typography, attributes, link, other-styles, devtools)
• All @/ui/* imports remapped to ../primitives
• Includes 4 test files for picker components

Stacks on #3172 + #3171

---

Summary by cubic

Adds inspector primitives, UI components, and section renderers for the new style inspector. Edit background, borders (per-side/per-corner with px/%), spacing, size (px/%), typography, attributes, links, and other styles, with new icons and updated inspector.css section/prop-row layout.

• New Features

  • Primitives: compound TextField (Root/Input/Slot), compound Select (Root/Trigger/Value/Content/Item with onValueChange), ToggleGroup, plus ColorInput, Text, Textarea, IconButton, Button, Label, Tooltip.
  • Components: NumberInput (drag-to-change, unit select), BorderPicker, PaddingPicker (uniform/per-side), BorderRadiusPicker (uniform/per-corner, px/%), TextInput, Section, PropRow, StylePanel, PropertyGroups.
  • Sections: background, border, padding, size, text, text-typography, attributes, link, other-styles.
  • Icons/CSS: added panel-*, corner-*, square, square-dashed, plus, x; updated icons/index.ts; added section and prop-row styles in inspector.css.

• Refactors

  • Inlined section config into property-groups and style-panel; removed legacy node section config.
  • Remapped inspector imports to ../primitives; normalized icon names/exports; tightened primitive exports to compound ToggleGroup and Select APIs.

^{Written for commit d8d2fc2. Summary will update on new commits.}

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Project	Deployment	Actions	Updated (UTC)
react-email	Ready	Preview, Comment	Apr 2, 2026 8:54pm
react-email-demo	Ready	Preview, Comment	Apr 2, 2026 8:54pm
react-email-examples	Ready	Preview, Comment	Apr 2, 2026 8:54pm

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commit: d8d2fc2