Add Unraid UI project documentation and research

- Complete Unraid WebGUI inventory (~100 pages documented)
- Unraid GraphQL API research and documentation
- Homarr architecture documentation
- Orchis GTK theme design tokens (TypeScript)
- Project README with implementation plan

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/unraid-ui-project/homarr-architecture.md

@@ -0,0 +1,60 @@
+# Homarr Architecture
+
+## Tech Stack
+- Next.js 13+ (App Router), React 18, TypeScript
+- Mantine UI (component library)
+- Zustand (client state), React Query (server state)
+- Prisma ORM (SQLite default / PostgreSQL)
+- Turbo monorepo, pnpm workspaces
+
+## Project Structure
+```
+homarr/
+├── apps/web/src/           # Main Next.js app
+│   ├── app/                # App Router pages
+│   ├── components/         # React components
+│   ├── modules/            # Widgets & integrations
+│   ├── stores/             # Zustand stores
+│   └── styles/             # Themes & global CSS
+├── packages/
+│   ├── api-client/         # API client lib
+│   ├── common/             # Shared types/utils
+│   ├── definitions/        # Widget/integration defs
+│   ├── auth/               # Auth logic
+│   └── ui/                 # Shared UI components
+├── prisma/                 # DB schema & migrations
+└── turbo.json
+```
+
+## Widget System
+Each widget in `apps/web/src/modules/`:
+- `definition.ts` - Metadata + Zod config schema
+- `component.tsx` - React component
+- `settings.tsx` - Config panel
+- `server-actions.ts` - Backend operations
+- Registered in module index, auto-discovered
+
+## Integration System
+External service connectors with:
+- API client abstraction, credential management
+- URL/hostname config, SSL handling
+- Error handling, retry, rate limiting, caching
+
+## Theming
+- CSS variables + Mantine theming + Tailwind
+- Light/dark mode, custom color palettes, accent colors
+- Wallpaper/background, font size, border radius customization
+- Theme persisted in database
+
+## Adding New Pages
+1. Create in `apps/web/src/app/(group)/page-name/page.tsx`
+2. Use Mantine UI components
+3. Add API routes in `src/app/api/`
+4. Create Zustand store or use React Query
+5. Update navigation config
+
+## Key Patterns
+- Server Components by default, `'use client'` for interactive
+- TRPC for type-safe RPC
+- Zod schemas for validation
+- Prisma for DB operations