Components: Form scaffolding & buttons #9

REQUIREMENTS §22 (Form scaffolding), §16 R16.3, §25.9. Base: shadcn form, field, label, button, button-group, input-group, card, separator; react-hook-form.

• Form (Form; react-hook-form + Inertia; 422 → field errors, focus first invalid, summary)
• Form group
• Fieldset / form section (collapsible, opens on invalid)
• Label
• Required marker
• Field errors
• AJAX validation errors (ValidationSummary / AjaxValidationErrors)
• Help text
• Form container
• Repeating group (useFieldArray or controlled arrays)
• Inline edit
• Autosave indicator (+ useAutosave)
• Save buttons bar (§25.9; useUnsavedChangesGuard)
• Floating submit
• Submit button
• Button
• Link button
• Button group
• Auth forms (SignInForm, RegisterForm, ForgotPasswordForm, ResetPasswordForm)

Merged into claude/amazing-cerf-htnpm8. 153 tests in the group; coverage 99.5% lines / 94.8% branches.

Follow-ups:

• Figma components + Code Connect (Figma kit & token sync #29)
• Repeating group: drag-to-reorder (currently Move up/down buttons)
• eFaas button assets (R16.7) — slot only until eFaas supplies them
• dv locale: label-to-input spacing looks large with Thaana line height