feat: Add navigation and basic pages structure

frontend/src/App.jsx

@@ -1,8 +1,12 @@
 import React from 'react'
 import { BrowserRouter as Router, Routes, Route, Navigate } from 'react-router-dom'
 import { AuthProvider, useAuth } from './context/AuthContext'
+import Navigation from './components/Navigation'
 import LoginPage from './pages/LoginPage'
 import Dashboard from './pages/Dashboard'
+import ProfilePage from './pages/ProfilePage'
+import ExercisesPage from './pages/ExercisesPage'
+import ClubsPage from './pages/ClubsPage'
 
 // Protected Route Component
 function ProtectedRoute({ children }) {
@@ -22,7 +26,12 @@ function ProtectedRoute({ children }) {
     )
   }
 
-  return isAuthenticated ? children : <Navigate to="/login" replace />
+  return isAuthenticated ? (
+    <>
+      <Navigation />
+      {children}
+    </>
+  ) : <Navigate to="/login" replace />
 }
 
 // Public Route Component (redirect to dashboard if already logged in)
@@ -68,6 +77,30 @@ function AppRoutes() {
           </ProtectedRoute>
         }
       />
+      <Route
+        path="/profile"
+        element={
+          <ProtectedRoute>
+            <ProfilePage />
+          </ProtectedRoute>
+        }
+      />
+      <Route
+        path="/exercises"
+        element={
+          <ProtectedRoute>
+            <ExercisesPage />
+          </ProtectedRoute>
+        }
+      />
+      <Route
+        path="/clubs"
+        element={
+          <ProtectedRoute>
+            <ClubsPage />
+          </ProtectedRoute>
+        }
+      />
 
       {/* Catch all - redirect to dashboard or login */}
       <Route path="*" element={<Navigate to="/" replace />} />

frontend/src/components/Navigation.jsx

@@ -0,0 +1,119 @@
+import { Link, useLocation, useNavigate } from 'react-router-dom'
+import { useAuth } from '../context/AuthContext'
+
+function Navigation() {
+  const location = useLocation()
+  const navigate = useNavigate()
+  const { user, logout } = useAuth()
+
+  const handleLogout = async () => {
+    await logout()
+    navigate('/login')
+  }
+
+  const isActive = (path) => location.pathname === path
+
+  return (
+    <nav style={{
+      background: 'var(--surface)',
+      borderBottom: '1px solid var(--border)',
+      padding: '0 1rem',
+      position: 'sticky',
+      top: 0,
+      zIndex: 1000
+    }}>
+      <div style={{
+        maxWidth: '1200px',
+        margin: '0 auto',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between',
+        height: '60px'
+      }}>
+        {/* Logo/Title */}
+        <Link to="/" style={{
+          fontSize: '1.25rem',
+          fontWeight: 600,
+          color: 'var(--text1)',
+          textDecoration: 'none'
+        }}>
+          🥋 Shinkan
+        </Link>
+
+        {/* Main Navigation */}
+        <div style={{ display: 'flex', gap: '1rem', alignItems: 'center' }}>
+          <Link
+            to="/"
+            style={{
+              color: isActive('/') ? 'var(--accent)' : 'var(--text2)',
+              textDecoration: 'none',
+              fontWeight: isActive('/') ? 600 : 400
+            }}
+          >
+            Dashboard
+          </Link>
+          <Link
+            to="/exercises"
+            style={{
+              color: isActive('/exercises') ? 'var(--accent)' : 'var(--text2)',
+              textDecoration: 'none',
+              fontWeight: isActive('/exercises') ? 600 : 400
+            }}
+          >
+            Übungen
+          </Link>
+          <Link
+            to="/clubs"
+            style={{
+              color: isActive('/clubs') ? 'var(--accent)' : 'var(--text2)',
+              textDecoration: 'none',
+              fontWeight: isActive('/clubs') ? 600 : 400
+            }}
+          >
+            Vereine
+          </Link>
+          <Link
+            to="/profile"
+            style={{
+              color: isActive('/profile') ? 'var(--accent)' : 'var(--text2)',
+              textDecoration: 'none',
+              fontWeight: isActive('/profile') ? 600 : 400
+            }}
+          >
+            Profil
+          </Link>
+
+          {/* User Menu */}
+          <div style={{
+            borderLeft: '1px solid var(--border)',
+            paddingLeft: '1rem',
+            marginLeft: '0.5rem',
+            display: 'flex',
+            alignItems: 'center',
+            gap: '0.75rem'
+          }}>
+            <span style={{ color: 'var(--text2)', fontSize: '0.875rem' }}>
+              {user?.name || user?.email}
+            </span>
+            <button
+              onClick={handleLogout}
+              style={{
+                padding: '0.5rem 1rem',
+                background: 'transparent',
+                border: '1px solid var(--border)',
+                borderRadius: '6px',
+                color: 'var(--text2)',
+                cursor: 'pointer',
+                fontSize: '0.875rem'
+              }}
+            >
+              Abmelden
+            </button>
+          </div>
+        </div>
+      </div>
+    </nav>
+  )
+}
+
+export default Navigation

frontend/src/pages/ClubsPage.jsx

@@ -0,0 +1,17 @@
+function ClubsPage() {
+  return (
+    <div style={{ padding: '2rem' }}>
+      <div style={{ maxWidth: '1200px', margin: '0 auto' }}>
+        <h1>Vereinsverwaltung</h1>
+
+        <div className="card" style={{ marginTop: '1.5rem' }}>
+          <p style={{ color: 'var(--text2)' }}>
+            Vereinsverwaltung folgt in Kürze
+          </p>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default ClubsPage

frontend/src/pages/Dashboard.jsx

@@ -1,5 +1,4 @@
 import React, { useState, useEffect } from 'react'
-import { useNavigate } from 'react-router-dom'
 import { useAuth } from '../context/AuthContext'
 import api from '../utils/api'
 
@@ -7,8 +6,7 @@ function Dashboard() {
   const [version, setVersion] = useState(null)
   const [profile, setProfile] = useState(null)
   const [loading, setLoading] = useState(true)
-  const { logout } = useAuth()
-  const navigate = useNavigate()
+  const { user } = useAuth()
 
   useEffect(() => {
     loadData()
@@ -29,18 +27,6 @@ function Dashboard() {
     }
   }
 
-  const handleLogout = async () => {
-    try {
-      await api.logout()
-    } catch (err) {
-      console.error('Logout error:', err)
-    } finally {
-      localStorage.removeItem('authToken')
-      logout()
-      navigate('/login')
-    }
-  }
-
   if (loading) {
     return (
       <div style={{ padding: '2rem', textAlign: 'center' }}>
@@ -51,32 +37,15 @@ function Dashboard() {
   }
 
   return (
-    <div style={{ minHeight: '100vh', background: 'var(--bg)', padding: '1rem' }}>
-      {/* Header */}
-      <div style={{
-        maxWidth: '1200px',
-        margin: '0 auto',
-        display: 'flex',
-        justifyContent: 'space-between',
-        alignItems: 'center',
-        marginBottom: '2rem'
-      }}>
-        <div>
-          <h1 style={{ margin: 0 }}>🥋 Shinkan Jinkendo</h1>
-          <p style={{ color: 'var(--text2)', margin: '0.25rem 0 0 0' }}>
-            Willkommen, {profile?.name || profile?.email}
-          </p>
-        </div>
-        <button className="btn btn-secondary" onClick={handleLogout}>
-          Abmelden
-        </button>
-      </div>
-
-      {/* Main Content */}
+    <div style={{ minHeight: '100vh', background: 'var(--bg)', padding: '2rem' }}>
       <div style={{ maxWidth: '1200px', margin: '0 auto' }}>
+        <h1>Dashboard</h1>
+        <p style={{ color: 'var(--text2)', marginTop: '0.5rem' }}>
+          Willkommen, {user?.name || user?.email}!
+        </p>
         {/* Welcome Card */}
-        <div className="card" style={{ marginBottom: '1.5rem' }}>
-          <h2>Dashboard</h2>
+        <div className="card" style={{ marginTop: '1.5rem', marginBottom: '1.5rem' }}>
+          <h2>Willkommen bei Shinkan Jinkendo</h2>
           <p style={{ color: 'var(--text2)' }}>
             Trainer- und Vereinsplattform für Kampfsport-Trainingsplanung
           </p>

frontend/src/pages/ExercisesPage.jsx

@@ -0,0 +1,17 @@
+function ExercisesPage() {
+  return (
+    <div style={{ padding: '2rem' }}>
+      <div style={{ maxWidth: '1200px', margin: '0 auto' }}>
+        <h1>Übungsverwaltung</h1>
+
+        <div className="card" style={{ marginTop: '1.5rem' }}>
+          <p style={{ color: 'var(--text2)' }}>
+            Übungsverwaltung wird als nächstes implementiert
+          </p>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default ExercisesPage

frontend/src/pages/ProfilePage.jsx

@@ -0,0 +1,60 @@
+import { useAuth } from '../context/AuthContext'
+
+function ProfilePage() {
+  const { user } = useAuth()
+
+  return (
+    <div style={{ padding: '2rem' }}>
+      <div style={{ maxWidth: '800px', margin: '0 auto' }}>
+        <h1>Profil</h1>
+
+        <div className="card" style={{ marginTop: '1.5rem' }}>
+          <h2>Persönliche Daten</h2>
+
+          <div style={{ marginTop: '1rem' }}>
+            <div style={{ display: 'grid', gridTemplateColumns: '150px 1fr', gap: '1rem', marginBottom: '1rem' }}>
+              <strong>Name:</strong>
+              <span>{user?.name || '-'}</span>
+
+              <strong>E-Mail:</strong>
+              <span>{user?.email}</span>
+
+              <strong>Rolle:</strong>
+              <span style={{
+                padding: '0.25rem 0.5rem',
+                background: user?.role === 'admin' ? 'var(--accent)' : 'var(--surface2)',
+                color: user?.role === 'admin' ? 'white' : 'var(--text1)',
+                borderRadius: '4px',
+                display: 'inline-block',
+                fontSize: '0.875rem'
+              }}>
+                {user?.role || 'user'}
+              </span>
+
+              <strong>Tier:</strong>
+              <span style={{
+                padding: '0.25rem 0.5rem',
+                background: user?.tier === 'premium' ? 'var(--accent)' : 'var(--surface2)',
+                color: user?.tier === 'premium' ? 'white' : 'var(--text1)',
+                borderRadius: '4px',
+                display: 'inline-block',
+                fontSize: '0.875rem'
+              }}>
+                {user?.tier || 'free'}
+              </span>
+            </div>
+          </div>
+        </div>
+
+        <div className="card" style={{ marginTop: '1.5rem' }}>
+          <h2>Einstellungen</h2>
+          <p style={{ color: 'var(--text2)', marginTop: '0.5rem' }}>
+            Bearbeitung folgt in Kürze
+          </p>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default ProfilePage