Extract reusable form patterns following Svelte 5 best practices:
**New Store Factory** (`project-form.svelte.ts`)
- Centralizes form state management with `$state` and `$derived` runes
- Provides validation, payload building, and field mutation methods
- Type-safe with ProjectFormData interface
- Reusable across different contexts
**New Helpers**
- `useDraftRecovery.svelte.ts`: Generic draft restoration with auto-detection
- `useFormGuards.svelte.ts`: Navigation guards, beforeunload warning, Cmd+S shortcut
- `DraftPrompt.svelte`: Extracted UI component for draft recovery prompts
**Refactored ProjectForm.svelte**
- Reduced from 720 lines to 417 lines (42% reduction)
- Uses new composable helpers instead of inline logic
- Cleaner separation between UI orchestration and business logic
- All form state now managed through formStore
- Draft recovery, navigation guards fully extracted
**Benefits**
- Reusable patterns for PostForm, EssayForm, etc.
- Easier to test helpers in isolation
- Consistent UX across all admin forms
- Better maintainability and code organization
Closes Task 3 of admin modernization plan (Phase 2)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Justin Edmund
34a3e370ec