## Why

The Headroom API currently returns raw JSON responses without a standardized wrapper. This violates the architecture specification (docs/headroom-architecture.md, lines 315-393) which mandates Laravel API Resources for consistent JSON structure. This technical debt creates several problems:

1. **Inconsistent Response Format**: Some endpoints return arrays, others objects, making client-side parsing error-prone
2. **No Future-Proofing**: Adding metadata (pagination, relationships, meta) requires breaking changes later
3. **Missing Data Wrapper**: Architecture requires `"data"` key for all responses to support future transformations
4. **No Resource Abstraction**: Direct model exposure limits ability to transform data without breaking clients

Since the application is pre-production and not in active use, we should fix this now to avoid permanent technical debt.

## What Changes

### Breaking Changes
- **BREAKING**: All API responses will be wrapped in `"data"` key
- **BREAKING**: Collections will use Laravel's resource collection format with `"data"` array
- **BREAKING**: Frontend API client must unwrap `response.data` instead of direct access

### New Components
- Create `app/Http/Resources/` directory structure
- Create 11 API Resource classes for consistent transformation
- Create base `BaseResource` with common formatting utilities

### Updated Components
- Update 6 controllers to use API Resources instead of `response()->json()`
- Update 63 backend tests to expect `"data"` wrapper in responses
- Update frontend API client to handle new response format
- Regenerate Scribe API documentation

## Capabilities

### New Capabilities
- `api-resource-standard`: Standardize all API responses using Laravel API Resources with consistent `"data"` wrapper

### Modified Capabilities
- *(none - this is a refactoring change, no functional requirements change)*

## Impact

### Backend (Laravel)
- **Files Created**: 11 new resource classes in `app/Http/Resources/`
- **Files Modified**: 6 controllers in `app/Http/Controllers/Api/`
- **Tests Updated**: 63 feature tests
- **New Tests**: 11+ unit tests for resource classes

### Frontend (SvelteKit)
- **Files Modified**: API client in `src/lib/api/` directory
- **Breaking**: All API calls must access `response.json().data` instead of `response.json()`

### Documentation
- **Regenerated**: Scribe API docs will show new response format

### Dependencies
- No new dependencies required (Laravel's built-in API Resources)

### Performance
- Minimal impact - API Resources add negligible overhead
- Slight improvement: Consistent caching keys can be optimized