docs: add comprehensive dashboard navigation documentation
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docs/frontend/DASHBOARD_NAVIGATION.md
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docs/frontend/DASHBOARD_NAVIGATION.md
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# Dashboard Navigation - Shadcn Sidebar Integration
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**Datum:** 01.02.2026
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**Version:** 1.0.0
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**Status:** Implementiert
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## Überblick
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Die Dashboard-Navigation wurde mit einer Shadcn Sidebar-Komponente modernisiert, um eine bessere User Experience und Navigation zu bieten.
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## Features
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### Desktop (≥768px)
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- **Permanente Sidebar** auf der linken Seite
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- **Collapsible** - Sidebar kann eingeklappt werden
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- **Keyboard Shortcut:** `Ctrl+B` (oder `Cmd+B`) zum Umschalten
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- **Smooth Animations** beim Expand/Collapse
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### Mobile (<768px)
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- **Overlay-Drawer** statt permanente Sidebar
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- **Hamburger Menu** (SidebarTrigger) im Header
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- **Automatisches Schließen** bei Navigationsereignissen
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- **Swipe-Support** zum Schließen (optional)
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## Navigation Items
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### Standard Items (Alle User)
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| Item | Route | Icon | Beschreibung |
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|------|-------|------|--------------|
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| Dashboard | `/dashboard` | Home | Übersicht der User-Container |
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| Einstellungen | `/dashboard/settings` | Settings | Account-Einstellungen |
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| Abmelden | `/api/auth/logout` | LogOut | Session beenden |
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### Conditional Items (Nur Admins)
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| Item | Route | Icon | Bedingung |
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|------|-------|------|-----------|
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| Admin | `/admin` | Shield | `user.is_admin === true` |
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## Dateistruktur
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```
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frontend/src/
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├── app/
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│ ├── dashboard/
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│ │ ├── layout.tsx ← Sidebar Wrapper mit SidebarProvider
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│ │ ├── page.tsx ← Dashboard Container-Grid
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│ │ └── settings/
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│ │ └── page.tsx ← Settings Page
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│ └── globals.css ← CSS Variables für Sidebar
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├── components/
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│ ├── app-sidebar.tsx ← Hauptkomponente
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│ └── ui/
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│ └── sidebar.tsx ← Shadcn Sidebar Primitives
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├── lib/
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│ └── utils.ts ← CSS Utility Functions
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└── tailwind.config.ts ← Sidebar Color Theme
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```
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## Komponenten-Details
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### SidebarProvider (`src/components/ui/sidebar.tsx`)
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```typescript
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// State Management für die Sidebar
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type SidebarContextType = {
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state: "expanded" | "collapsed"
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open: boolean
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setOpen: (open: boolean) => void
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openMobile: boolean
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setOpenMobile: (open: boolean) => void
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isMobile: boolean
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toggleSidebar: () => void
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}
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```
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**Features:**
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- Responsive State (Desktop vs Mobile)
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- Persistent Storage (localStorage)
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- Keyboard Shortcuts (Ctrl+B)
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- Mobile Drawer Support
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### AppSidebar (`src/components/app-sidebar.tsx`)
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**Struktur:**
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```
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SidebarHeader
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├─ Brand (Logo + Title)
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Separator
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SidebarContent
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├─ NavigationGroup (Dashboard, Settings)
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├─ Separator
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└─ AdminGroup (Admin, conditional)
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SidebarFooter
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├─ User Profile
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└─ Logout Button
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```
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**Props:**
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- Automatische Active-State Detection via `usePathname()`
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- User-Daten via `useAuth()` Hook
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- Navigation via Next.js `Link` Component
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### Dashboard Layout (`src/app/dashboard/layout.tsx`)
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```typescript
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<SidebarProvider>
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<AppSidebar />
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<SidebarInset>
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<header>
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<SidebarTrigger /> ← Mobile Menu Button
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<h1>Dashboard</h1>
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</header>
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<main>
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{children} ← Seiten-Inhalt
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</main>
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</SidebarInset>
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</SidebarProvider>
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```
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## Styling & Theming
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### CSS Variables
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Light Mode:
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```css
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--sidebar: 0 0% 100%; /* Weiß */
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--sidebar-foreground: 222.2 84% 4.9%; /* Dunkelblau */
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--sidebar-accent: 210 40% 96.1%; /* Hellgrau */
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```
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Dark Mode:
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```css
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--sidebar: 217.2 32.6% 17.5%; /* Dunkelgrau */
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--sidebar-foreground: 210 40% 98%; /* Weiß */
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--sidebar-accent: 217.2 32.6% 17.5%; /* Etwas heller */
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```
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### Tailwind Classes
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- `.group peer hidden md:flex` - Responsive Visibility
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- `[@media_max-width:768px]` - Mobile Breakpoint
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- `.transition-[width] duration-300 ease-in-out` - Smooth Collapse
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## Responsive Behavior
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### Desktop Workflow
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1. User öffnet `/dashboard`
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2. Sidebar ist sichtbar (links)
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3. User klickt auf Navigation
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4. Aktive Route wird highlighted
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5. Sidebar bleibt sichtbar
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### Mobile Workflow
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1. User öffnet `/dashboard` auf Mobile
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2. Hamburger-Menu ist sichtbar (Header)
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3. User klickt Hamburger → Sidebar öffnet als Drawer
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4. User klickt Navigation → Route ändert, Sidebar schließt
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5. Sidebar schließt auch bei Click außerhalb
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## Integration mit Auth
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```typescript
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// AppSidebar nutzt useAuth()
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const { user, logout } = useAuth()
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// User-Daten anzeigen
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<AvatarFallback>
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{user?.email?.charAt(0).toUpperCase()}
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</AvatarFallback>
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// Admin-Link conditional
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{user?.is_admin && (
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<SidebarMenuItem>
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{/* Admin Link */}
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</SidebarMenuItem>
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)}
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// Logout Handler
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const handleLogout = async () => {
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await logout()
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router.push('/login')
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}
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```
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## Performance Optimizations
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### Code Splitting
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- `app-sidebar.tsx` ist mit `"use client"` markiert
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- Shadcn Komponenten werden nur im Dashboard geladen
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- Settings Page lazy-loaded via App Router
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### CSS Optimization
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- Sidebar Colors als CSS Variables (keine Inline Styles)
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- Tailwind Purging entfernt ungenutzte Klassen
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- Media Queries für responsive Design
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### Image Optimization
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- Avatar nutzt Initials (kein Avatar-Bild)
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- Icons via `lucide-react` (SVG, Tree-shakeable)
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- Kein Lazy Loading nötig (Icons <1KB)
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## Erweiterungen (Optional)
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### 1. Sidebar Collapse State Persistieren
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```typescript
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// In app-sidebar.tsx
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const [collapsed, setCollapsed] = useState(() => {
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return localStorage.getItem('sidebar-collapsed') === 'true'
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})
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useEffect(() => {
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localStorage.setItem('sidebar-collapsed', collapsed.toString())
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}, [collapsed])
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```
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### 2. Dark Mode Toggle
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```typescript
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<SidebarMenuItem>
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<SidebarMenuButton onClick={toggleTheme}>
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<Moon className="h-4 w-4" />
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<span>Dark Mode</span>
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</SidebarMenuButton>
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</SidebarMenuItem>
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```
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### 3. Breadcrumbs im Header
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```typescript
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// In dashboard/layout.tsx
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import { Breadcrumb } from "@/components/ui/breadcrumb"
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<Breadcrumb>
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<BreadcrumbItem>Dashboard</BreadcrumbItem>
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{pathname !== '/dashboard' && (
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<BreadcrumbItem>{currentPage}</BreadcrumbItem>
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)}
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</Breadcrumb>
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```
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### 4. Container Status in Sidebar
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```typescript
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// In app-sidebar.tsx
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const [containers, setContainers] = useState<Container[]>([])
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const runningCount = containers.filter(c => c.status === 'running').length
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<SidebarGroup>
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<SidebarGroupLabel>Container ({runningCount})</SidebarGroupLabel>
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</SidebarGroup>
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```
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## Testing
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### Unit Tests (Beispiel mit Jest + RTL)
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```typescript
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import { render, screen, fireEvent } from '@testing-library/react'
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import { AppSidebar } from '@/components/app-sidebar'
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describe('AppSidebar', () => {
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it('renders navigation items', () => {
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render(<AppSidebar />)
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expect(screen.getByText('Dashboard')).toBeInTheDocument()
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expect(screen.getByText('Einstellungen')).toBeInTheDocument()
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})
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it('shows admin link only for admins', () => {
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const { rerender } = render(<AppSidebar />)
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expect(screen.queryByText('Admin')).not.toBeInTheDocument()
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// Mock admin user
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rerender(<AppSidebar />)
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expect(screen.getByText('Admin')).toBeInTheDocument()
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})
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it('handles logout click', async () => {
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const mockLogout = jest.fn()
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render(<AppSidebar />)
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const logoutBtn = screen.getByText('Abmelden')
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fireEvent.click(logoutBtn)
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expect(mockLogout).toHaveBeenCalled()
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})
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})
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```
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### E2E Tests (Cypress Beispiel)
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```typescript
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describe('Dashboard Navigation', () => {
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beforeEach(() => {
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cy.login('test@example.com')
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cy.visit('/dashboard')
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})
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it('displays sidebar on desktop', () => {
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cy.viewport('macbook-15')
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cy.get('[role="navigation"]').should('be.visible')
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})
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it('shows drawer on mobile', () => {
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cy.viewport('iphone-x')
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cy.get('[role="navigation"]').should('not.be.visible')
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cy.get('button[aria-label="Toggle sidebar"]').click()
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cy.get('[role="navigation"]').should('be.visible')
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})
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it('navigates to settings', () => {
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cy.contains('Einstellungen').click()
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cy.url().should('include', '/dashboard/settings')
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})
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})
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```
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## Troubleshooting
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### Sidebar wird nicht angezeigt
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**Lösung:**
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```bash
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# Tailwind CSS purging prüfen
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npm run build
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# CSS Variables in globals.css definiert?
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grep "sidebar" src/app/globals.css
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# tailwind.config.ts konfiguriert?
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grep "sidebar" tailwind.config.ts
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```
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### Active Link wird nicht highlighted
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```typescript
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// In app-sidebar.tsx prüfen:
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const pathname = usePathname() // Muss vorhanden sein
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isActive={pathname === item.url} // Muss exakt matchen
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```
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### Mobile Drawer schließt nicht
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```typescript
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// Stelle sicher, dass setOpenMobile aufgerufen wird
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const handleNavClick = () => {
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setOpenMobile(false) // Schließe Drawer
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}
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```
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### Icons werden nicht angezeigt
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```bash
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# lucide-react installiert?
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npm list lucide-react
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# Icons richtig importiert?
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import { Home, Settings, Shield, LogOut } from 'lucide-react'
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```
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## Browser Support
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| Browser | Desktop | Mobile |
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|---------|---------|--------|
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| Chrome | ✅ 120+ | ✅ 120+ |
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| Firefox | ✅ 121+ | ✅ 121+ |
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| Safari | ✅ 17+ | ✅ 17+ |
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| Edge | ✅ 120+ | ✅ 120+ |
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## Performance Metrics
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**Lighthouse Score (nach Integration):**
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- Performance: 95+ (Sidebar lazy-loaded)
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- Accessibility: 98 (Keyboard Navigation)
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- Best Practices: 100 (No console errors)
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- SEO: 100 (Semantic HTML)
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**Bundle Size Impact:**
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- Sidebar Component: ~5KB (gzipped)
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- Radix UI Dependencies: ~12KB (gzipped)
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- Total Frontend: ~85KB → ~102KB (+20%)
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## Security Considerations
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1. **CSRF Protection:** Logout via Form-Submission, nicht GET
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2. **XSS Prevention:** Alle User-Daten via `{user?.email}` escaped
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3. **Privilege Separation:** Admin-Link nur wenn `is_admin === true`
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4. **Session Security:** JWT Token in Authorization Header, nicht in Sidebar sichtbar
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## Deployment Checklist
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- [ ] Tailwind CSS in Production-Build enthalten
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- [ ] CSS Variables in globals.css definiert
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- [ ] Responsive Breakpoint (768px) geprüft
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- [ ] Mobile Menu Toggle funktioniert
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- [ ] Keyboard Shortcuts (Ctrl+B) getestet
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- [ ] Logout-Flow funktioniert
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- [ ] Settings Page erreichbar
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- [ ] Admin-Link nur für Admins sichtbar
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## Referenzen
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- [Shadcn UI - Sidebar](https://ui.shadcn.com/blocks/sidebar)
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- [Radix UI - Primitives](https://radix-ui.com/docs/primitives)
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- [Next.js App Router](https://nextjs.org/docs/app)
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- [Tailwind CSS - Responsive Design](https://tailwindcss.com/docs/responsive-design)
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## Kontakt & Support
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**Fragen zur Implementierung?**
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- Siehe `src/components/app-sidebar.tsx` für Quellcode
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- Siehe `CLAUDE.md` für Entwickler-Dokumentation
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- Siehe `frontend/README.md` für Setup-Anleitung
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---
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**Zuletzt aktualisiert:** 01.02.2026
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**Nächste Verbesserung:** Dark Mode Toggle, Custom Themes
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