feat(admin): complete Task 7 Phase 1 - styling & theming foundation
Implemented a three-layer theming architecture to standardize admin component
styling and prepare for future dark mode support.
**Architecture:**
- Layer 1: Base colors ($gray-80, $red-60) in variables.scss
- Layer 2: Semantic SCSS variables ($input-bg, $error-bg) in variables.scss
- Layer 3: CSS custom properties (--input-bg, --error-bg) in themes.scss
**New semantic variables (~30 added):**
- Inputs & forms (bg, hover, focus, text, border states)
- State messages (error, success, warning with bg/text/border)
- Empty states (text, heading colors)
- Cards, dropdowns, popovers, modals (bg, border, shadow)
**New reusable components:**
- EmptyState.svelte - Supports icon and action snippets
- ErrorMessage.svelte - Supports dismissible errors
**Pages refactored:**
- /admin/projects - Uses EmptyState and ErrorMessage (~30 lines removed)
- /admin/posts - Uses EmptyState and ErrorMessage with icon (~30 lines removed)
**Benefits:**
- 60+ lines of duplicate styles removed (just 2 pages)
- Future dark mode = remap CSS variables in themes.scss only
- Guaranteed visual consistency for errors and empty states
- $unit-based spacing system enforced
**Remaining work (Phase 2):**
- Replace hardcoded colors in ~40 files
- Fix hardcoded spacing in ~20 files
- Expand EmptyState/ErrorMessage to remaining pages
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Justin Edmund
45e3556663