Initial commit: Mathe-App Phase 1-3

- React+Vite Frontend mit Routing, eigenem fetch-Client (kein axios)
- Express Backend: Auth (JWT), Topics, Tasks, Leaderboard
- PostgreSQL Schema + Seed: 7 Kategorien, 21 Topics, ~25 Aufgaben
- Gamification: XP, Level (100×n^1.5), tägliche Streaks
- docker-compose auf Port 3100 für DS1621
- Alltagsaufgaben: Finanzen, Geometrie, Physik, Informatik, Verkehr, Shopping
This commit is contained in:
rene 2026-04-06 17:24:35 +02:00
commit c8b354ed45
49 changed files with 6127 additions and 0 deletions

184
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.counter {
font-size: 16px;
padding: 5px 10px;
border-radius: 5px;
color: var(--accent);
background: var(--accent-bg);
border: 2px solid transparent;
transition: border-color 0.3s;
margin-bottom: 24px;
&:hover {
border-color: var(--accent-border);
}
&:focus-visible {
outline: 2px solid var(--accent);
outline-offset: 2px;
}
}
.hero {
position: relative;
.base,
.framework,
.vite {
inset-inline: 0;
margin: 0 auto;
}
.base {
width: 170px;
position: relative;
z-index: 0;
}
.framework,
.vite {
position: absolute;
}
.framework {
z-index: 1;
top: 34px;
height: 28px;
transform: perspective(2000px) rotateZ(300deg) rotateX(44deg) rotateY(39deg)
scale(1.4);
}
.vite {
z-index: 0;
top: 107px;
height: 26px;
width: auto;
transform: perspective(2000px) rotateZ(300deg) rotateX(40deg) rotateY(39deg)
scale(0.8);
}
}
#center {
display: flex;
flex-direction: column;
gap: 25px;
place-content: center;
place-items: center;
flex-grow: 1;
@media (max-width: 1024px) {
padding: 32px 20px 24px;
gap: 18px;
}
}
#next-steps {
display: flex;
border-top: 1px solid var(--border);
text-align: left;
& > div {
flex: 1 1 0;
padding: 32px;
@media (max-width: 1024px) {
padding: 24px 20px;
}
}
.icon {
margin-bottom: 16px;
width: 22px;
height: 22px;
}
@media (max-width: 1024px) {
flex-direction: column;
text-align: center;
}
}
#docs {
border-right: 1px solid var(--border);
@media (max-width: 1024px) {
border-right: none;
border-bottom: 1px solid var(--border);
}
}
#next-steps ul {
list-style: none;
padding: 0;
display: flex;
gap: 8px;
margin: 32px 0 0;
.logo {
height: 18px;
}
a {
color: var(--text-h);
font-size: 16px;
border-radius: 6px;
background: var(--social-bg);
display: flex;
padding: 6px 12px;
align-items: center;
gap: 8px;
text-decoration: none;
transition: box-shadow 0.3s;
&:hover {
box-shadow: var(--shadow);
}
.button-icon {
height: 18px;
width: 18px;
}
}
@media (max-width: 1024px) {
margin-top: 20px;
flex-wrap: wrap;
justify-content: center;
li {
flex: 1 1 calc(50% - 8px);
}
a {
width: 100%;
justify-content: center;
box-sizing: border-box;
}
}
}
#spacer {
height: 88px;
border-top: 1px solid var(--border);
@media (max-width: 1024px) {
height: 48px;
}
}
.ticks {
position: relative;
width: 100%;
&::before,
&::after {
content: '';
position: absolute;
top: -4.5px;
border: 5px solid transparent;
}
&::before {
left: 0;
border-left-color: var(--border);
}
&::after {
right: 0;
border-right-color: var(--border);
}
}

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import { Routes, Route, Navigate } from 'react-router-dom'
import Home from './pages/Home.jsx'
import Login from './pages/Login.jsx'
import Register from './pages/Register.jsx'
import Dashboard from './pages/Dashboard.jsx'
import TopicPage from './pages/TopicPage.jsx'
export default function App() {
return (
<Routes>
<Route path="/" element={<Home />} />
<Route path="/login" element={<Login />} />
<Route path="/register" element={<Register />} />
<Route path="/dashboard" element={<Dashboard />} />
<Route path="/topic/:slug" element={<TopicPage />} />
<Route path="*" element={<Navigate to="/" replace />} />
</Routes>
)
}

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const BASE = '/api'
function getToken() {
return localStorage.getItem('token')
}
function headers(extra = {}) {
const h = { 'Content-Type': 'application/json', ...extra }
const token = getToken()
if (token) h['Authorization'] = `Bearer ${token}`
return h
}
async function request(method, path, body) {
const res = await fetch(`${BASE}${path}`, {
method,
headers: headers(),
credentials: 'include',
body: body !== undefined ? JSON.stringify(body) : undefined,
})
const data = await res.json().catch(() => ({}))
if (!res.ok) {
const err = new Error(data.message || `HTTP ${res.status}`)
err.status = res.status
err.data = data
throw err
}
return data
}
const api = {
get: (path) => request('GET', path),
post: (path, body) => request('POST', path, body),
put: (path, body) => request('PUT', path, body),
delete: (path) => request('DELETE', path),
}
export default api

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.task-card {
background: white;
border: 2px solid #e8e8e8;
border-radius: 12px;
padding: 1.5rem;
transition: border-color 0.3s;
}
.task-card.solved { border-color: #d1fae5; background: #f0fdf4; }
.task-card.correct { border-color: #6ee7b7; }
.task-card.wrong { border-color: #fca5a5; }
.task-header {
display: flex;
justify-content: space-between;
align-items: flex-start;
margin-bottom: 0.8rem;
gap: 1rem;
}
.task-title {
font-weight: 700;
color: #1a1a2e;
font-size: 1rem;
}
.task-meta {
display: flex;
align-items: center;
gap: 0.5rem;
flex-shrink: 0;
}
.task-xp {
background: #ede9fe;
color: #6c63ff;
font-size: 0.75rem;
font-weight: 700;
padding: 0.2rem 0.5rem;
border-radius: 20px;
}
.task-diff {
color: #f59e0b;
font-size: 0.85rem;
}
.task-check {
color: #10b981;
font-size: 1.1rem;
font-weight: 700;
}
.task-question {
color: #333;
line-height: 1.6;
margin-bottom: 1.2rem;
}
.task-form {
display: flex;
flex-direction: column;
gap: 0.8rem;
}
.number-input {
display: flex;
align-items: center;
gap: 0.5rem;
}
.number-input input {
flex: 1;
padding: 0.7rem 1rem;
border: 1px solid #ddd;
border-radius: 8px;
font-size: 1rem;
}
.number-input input:focus {
outline: none;
border-color: #6c63ff;
}
.unit-label {
color: #666;
font-size: 0.9rem;
white-space: nowrap;
}
.choices {
display: flex;
gap: 0.5rem;
flex-wrap: wrap;
}
.choice-btn {
padding: 0.6rem 1.2rem;
border: 2px solid #e8e8e8;
border-radius: 8px;
background: white;
cursor: pointer;
font-size: 0.95rem;
font-weight: 600;
transition: border-color 0.2s, background 0.2s;
}
.choice-btn.selected {
border-color: #6c63ff;
background: #ede9fe;
color: #6c63ff;
}
.choice-btn:hover { border-color: #6c63ff; }
.task-submit {
align-self: flex-start;
padding: 0.7rem 1.8rem;
}
.task-feedback {
margin-top: 1rem;
padding: 1rem;
border-radius: 8px;
display: flex;
flex-direction: column;
gap: 0.4rem;
}
.feedback-correct { background: #f0fdf4; color: #065f46; }
.feedback-wrong { background: #fef2f2; color: #991b1b; }
.task-feedback strong { font-size: 1rem; }
.xp-badge {
background: #6c63ff;
color: white;
font-size: 0.75rem;
font-weight: 700;
padding: 0.2rem 0.6rem;
border-radius: 20px;
align-self: flex-start;
}
.level-badge {
background: #f59e0b;
color: white;
font-size: 0.75rem;
font-weight: 700;
padding: 0.2rem 0.6rem;
border-radius: 20px;
align-self: flex-start;
}
.explanation {
font-size: 0.9rem;
line-height: 1.5;
opacity: 0.85;
margin-top: 0.3rem;
}
.task-error {
color: #e74c3c;
font-size: 0.9rem;
margin-top: 0.5rem;
}

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import { useState } from 'react'
import api from '../api/client.js'
import './TaskCard.css'
export default function TaskCard({ task, onSolved }) {
const [answer, setAnswer] = useState('')
const [result, setResult] = useState(null)
const [loading, setLoading] = useState(false)
const alreadySolved = task.solved === true
async function submit(e) {
e.preventDefault()
if (!answer.trim()) return
setLoading(true)
try {
const res = await api.post(`/tasks/${task.id}/submit`, { answer })
setResult(res)
onSolved(res)
} catch (err) {
setResult({ error: err.message })
} finally {
setLoading(false)
}
}
function selectChoice(choice) {
setAnswer(choice)
}
const statusClass = alreadySolved ? 'solved' : result ? (result.correct ? 'correct' : 'wrong') : ''
return (
<div className={`task-card ${statusClass}`}>
<div className="task-header">
<span className="task-title">{task.title}</span>
<div className="task-meta">
<span className="task-xp">+{task.xp_reward} XP</span>
<span className="task-diff">{'★'.repeat(task.difficulty)}{'☆'.repeat(5 - task.difficulty)}</span>
{alreadySolved && <span className="task-check"></span>}
</div>
</div>
<p className="task-question">{task.question}</p>
{!alreadySolved && !result && (
<form className="task-form" onSubmit={submit}>
{task.answer_type === 'multiple_choice' ? (
<div className="choices">
{task.choices?.map(c => (
<button
key={c}
type="button"
className={`choice-btn ${answer === c ? 'selected' : ''}`}
onClick={() => selectChoice(c)}
>
{c}
</button>
))}
</div>
) : (
<div className="number-input">
<input
type="text"
inputMode="decimal"
placeholder={task.unit ? `Antwort in ${task.unit}` : 'Deine Antwort'}
value={answer}
onChange={e => setAnswer(e.target.value)}
autoComplete="off"
/>
{task.unit && <span className="unit-label">{task.unit}</span>}
</div>
)}
<button
type="submit"
className="btn btn-primary task-submit"
disabled={loading || !answer}
>
{loading ? '…' : 'Prüfen'}
</button>
</form>
)}
{result && !result.error && (
<div className={`task-feedback ${result.correct ? 'feedback-correct' : 'feedback-wrong'}`}>
<strong>{result.correct ? '✓ Richtig!' : '✗ Leider falsch'}</strong>
{result.xpGained > 0 && <span className="xp-badge">+{result.xpGained} XP</span>}
{result.newLevel && <span className="level-badge">Level {result.newLevel}!</span>}
<p className="explanation">{result.explanation}</p>
</div>
)}
{alreadySolved && (
<div className="task-feedback feedback-correct">
<strong> Bereits gelöst</strong>
</div>
)}
{result?.error && <p className="task-error">{result.error}</p>}
</div>
)
}

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*, *::before, *::after {
box-sizing: border-box;
}
body {
margin: 0;
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
background: #f5f5f5;
color: #222;
-webkit-font-smoothing: antialiased;
font-size: 16px;
line-height: 1.5;
}
h1, h2, h3 { margin: 0; }
p { margin: 0; }
a { color: inherit; }
#root {
min-height: 100vh;
}
.btn {
padding: 0.8rem 2rem;
border-radius: 8px;
font-size: 1rem;
font-weight: 600;
text-decoration: none;
border: none;
cursor: pointer;
transition: opacity 0.2s;
display: inline-block;
}
.btn:hover { opacity: 0.85; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-primary { background: #6c63ff; color: white; }
.btn-secondary { background: #e8e8e8; color: #333; }

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import { StrictMode } from 'react'
import { createRoot } from 'react-dom/client'
import { BrowserRouter } from 'react-router-dom'
import './index.css'
import App from './App.jsx'
createRoot(document.getElementById('root')).render(
<StrictMode>
<BrowserRouter>
<App />
</BrowserRouter>
</StrictMode>,
)

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.auth-container {
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
padding: 1rem;
background: #f5f5f5;
}
.auth-card {
background: white;
border-radius: 12px;
padding: 2.5rem;
width: 100%;
max-width: 400px;
box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.auth-card h2 {
margin-bottom: 1.5rem;
color: #1a1a2e;
font-size: 1.8rem;
}
.auth-card form {
display: flex;
flex-direction: column;
gap: 1rem;
}
.auth-card label {
display: flex;
flex-direction: column;
gap: 0.4rem;
font-size: 0.9rem;
font-weight: 600;
color: #444;
}
.auth-card input {
padding: 0.7rem 1rem;
border: 1px solid #ddd;
border-radius: 8px;
font-size: 1rem;
transition: border-color 0.2s;
}
.auth-card input:focus {
outline: none;
border-color: #6c63ff;
}
.auth-error {
color: #e74c3c;
font-size: 0.9rem;
margin: 0;
}
.auth-card .btn {
width: 100%;
margin-top: 0.5rem;
padding: 0.9rem;
}
.auth-card .btn:disabled {
opacity: 0.6;
cursor: not-allowed;
}
.auth-switch {
margin-top: 1.5rem;
text-align: center;
font-size: 0.9rem;
color: #666;
}
.auth-switch a {
color: #6c63ff;
font-weight: 600;
text-decoration: none;
}

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.dashboard {
max-width: 960px;
margin: 0 auto;
padding: 1.5rem 1rem 4rem;
}
.dashboard-loading {
text-align: center;
padding: 4rem;
color: #666;
}
.dashboard-header {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 2rem;
}
.dashboard-logo {
font-size: 1.3rem;
font-weight: 700;
color: #6c63ff;
text-decoration: none;
}
.dashboard-stats {
display: grid;
grid-template-columns: 2fr 1fr 1fr;
gap: 1rem;
margin-bottom: 2.5rem;
}
.stat-card {
background: white;
border: 1px solid #e8e8e8;
border-radius: 12px;
padding: 1.2rem 1.5rem;
display: flex;
flex-direction: column;
gap: 0.4rem;
box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.stat-value {
font-size: 1.5rem;
font-weight: 700;
color: #1a1a2e;
}
.stat-label {
font-size: 0.8rem;
color: #999;
text-transform: uppercase;
letter-spacing: 0.05em;
}
.xp-bar {
height: 6px;
background: #f0f0f0;
border-radius: 3px;
overflow: hidden;
}
.xp-fill {
height: 100%;
background: linear-gradient(90deg, #6c63ff, #a78bfa);
border-radius: 3px;
transition: width 0.4s ease;
}
.category-block {
margin-bottom: 2rem;
}
.category-block h2 {
font-size: 1.1rem;
color: #444;
margin-bottom: 0.8rem;
font-weight: 600;
}
.topic-grid {
display: grid;
grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
gap: 0.8rem;
}
.topic-card {
background: white;
border: 1px solid #e8e8e8;
border-radius: 10px;
padding: 1rem 1.2rem;
text-decoration: none;
display: flex;
flex-direction: column;
gap: 0.3rem;
transition: box-shadow 0.2s, border-color 0.2s;
}
.topic-card:hover {
border-color: #6c63ff;
box-shadow: 0 4px 12px rgba(108,99,255,0.1);
}
.topic-title {
font-weight: 600;
color: #1a1a2e;
font-size: 0.95rem;
}
.topic-meta {
font-size: 0.8rem;
color: #999;
}
.topic-premium {
font-size: 0.75rem;
color: #f59e0b;
font-weight: 600;
}

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import { useEffect, useState } from 'react'
import { useNavigate, Link } from 'react-router-dom'
import api from '../api/client.js'
import './Dashboard.css'
export default function Dashboard() {
const navigate = useNavigate()
const [user, setUser] = useState(null)
const [categories, setCategories] = useState([])
useEffect(() => {
Promise.all([api.get('/users/me'), api.get('/topics')])
.then(([u, cats]) => { setUser(u); setCategories(cats) })
.catch(() => navigate('/login'))
}, [navigate])
if (!user) return <div className="dashboard-loading">Lade</div>
const xpForNext = Math.floor(100 * Math.pow(user.level, 1.5))
const xpProgress = Math.min((user.xp / xpForNext) * 100, 100)
return (
<div className="dashboard">
<header className="dashboard-header">
<Link to="/" className="dashboard-logo">Mathe im Alltag</Link>
<button className="btn btn-secondary" onClick={() => {
localStorage.removeItem('token')
navigate('/')
}}>Abmelden</button>
</header>
<div className="dashboard-stats">
<div className="stat-card">
<span className="stat-value">{user.xp} XP</span>
<div className="xp-bar"><div className="xp-fill" style={{ width: `${xpProgress}%` }} /></div>
<span className="stat-label">Level {user.level} {user.level + 1}</span>
</div>
<div className="stat-card">
<span className="stat-value">{user.streak} 🔥</span>
<span className="stat-label">Tage Streak</span>
</div>
<div className="stat-card">
<span className="stat-value">@{user.username}</span>
<span className="stat-label">{user.is_premium ? '⭐ Premium' : 'Free'}</span>
</div>
</div>
<div className="dashboard-topics">
{categories.map(cat => (
<div key={cat.id} className="category-block">
<h2>{cat.icon} {cat.title}</h2>
<div className="topic-grid">
{cat.topics.map(topic => (
<Link key={topic.id} to={`/topic/${topic.slug}`} className="topic-card">
<span className="topic-title">{topic.title}</span>
<span className="topic-meta">{topic.task_count} Aufgaben · {'★'.repeat(topic.difficulty)}{'☆'.repeat(5 - topic.difficulty)}</span>
{topic.is_premium && <span className="topic-premium"> Premium</span>}
</Link>
))}
</div>
</div>
))}
</div>
</div>
)
}

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.home {
max-width: 900px;
margin: 0 auto;
padding: 2rem 1rem;
}
.home-hero {
text-align: center;
padding: 4rem 1rem;
}
.home-hero h1 {
font-size: 3rem;
margin-bottom: 1rem;
color: #1a1a2e;
}
.home-subtitle {
font-size: 1.2rem;
color: #555;
max-width: 560px;
margin: 0 auto 2rem;
line-height: 1.6;
}
.home-actions {
display: flex;
gap: 1rem;
justify-content: center;
flex-wrap: wrap;
}
.btn {
padding: 0.8rem 2rem;
border-radius: 8px;
font-size: 1rem;
font-weight: 600;
text-decoration: none;
border: none;
cursor: pointer;
transition: opacity 0.2s;
}
.btn:hover { opacity: 0.85; }
.btn-primary {
background: #6c63ff;
color: white;
}
.btn-secondary {
background: #f0f0f0;
color: #333;
}
.home-features {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
gap: 1.5rem;
margin-top: 3rem;
}
.feature-card {
background: white;
border: 1px solid #e8e8e8;
border-radius: 12px;
padding: 2rem 1.5rem;
text-align: center;
box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.feature-icon {
font-size: 2.5rem;
display: block;
margin-bottom: 1rem;
}
.feature-card h3 {
margin-bottom: 0.5rem;
color: #1a1a2e;
}
.feature-card p {
color: #666;
font-size: 0.95rem;
line-height: 1.5;
}

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import { Link } from 'react-router-dom'
import './Home.css'
export default function Home() {
return (
<div className="home">
<div className="home-hero">
<h1>Mathe im Alltag</h1>
<p className="home-subtitle">
Lerne Mathematik anhand echter Situationen Zinsen, Rabatte,
Energiekosten und mehr. Mit Punkten, Levels und Wettbewerb.
</p>
<div className="home-actions">
<Link to="/register" className="btn btn-primary">Kostenlos starten</Link>
<Link to="/login" className="btn btn-secondary">Anmelden</Link>
</div>
</div>
<div className="home-features">
<div className="feature-card">
<span className="feature-icon">📈</span>
<h3>Alltagsmathe</h3>
<p>Aufgaben aus dem echten Leben Kredit, Strom, Einkauf, Reisen</p>
</div>
<div className="feature-card">
<span className="feature-icon">🏆</span>
<h3>Punkte & Level</h3>
<p>Sammle XP, steige auf und halte deinen Streak am Leben</p>
</div>
<div className="feature-card">
<span className="feature-icon"></span>
<h3>Rangliste</h3>
<p>Miss dich mit anderen und klettere in der Bestenliste nach oben</p>
</div>
</div>
</div>
)
}

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import { useState } from 'react'
import { Link, useNavigate } from 'react-router-dom'
import api from '../api/client.js'
import './AuthForm.css'
export default function Login() {
const navigate = useNavigate()
const [form, setForm] = useState({ email: '', password: '' })
const [error, setError] = useState('')
const [loading, setLoading] = useState(false)
const handleChange = (e) => setForm({ ...form, [e.target.name]: e.target.value })
const handleSubmit = async (e) => {
e.preventDefault()
setError('')
setLoading(true)
try {
const res = await api.post('/auth/login', form)
localStorage.setItem('token', res.token)
navigate('/dashboard')
} catch (err) {
setError(err.message || 'Anmeldung fehlgeschlagen')
} finally {
setLoading(false)
}
}
return (
<div className="auth-container">
<div className="auth-card">
<h2>Anmelden</h2>
<form onSubmit={handleSubmit}>
<label>E-Mail
<input type="email" name="email" value={form.email} onChange={handleChange} required />
</label>
<label>Passwort
<input type="password" name="password" value={form.password} onChange={handleChange} required />
</label>
{error && <p className="auth-error">{error}</p>}
<button type="submit" className="btn btn-primary" disabled={loading}>
{loading ? 'Bitte warten…' : 'Anmelden'}
</button>
</form>
<p className="auth-switch">Noch kein Konto? <Link to="/register">Registrieren</Link></p>
</div>
</div>
)
}

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import { useState } from 'react'
import { Link, useNavigate } from 'react-router-dom'
import api from '../api/client.js'
import './AuthForm.css'
export default function Register() {
const navigate = useNavigate()
const [form, setForm] = useState({ username: '', email: '', password: '' })
const [error, setError] = useState('')
const [loading, setLoading] = useState(false)
const handleChange = (e) => setForm({ ...form, [e.target.name]: e.target.value })
const handleSubmit = async (e) => {
e.preventDefault()
setError('')
setLoading(true)
try {
const res = await api.post('/auth/register', form)
localStorage.setItem('token', res.token)
navigate('/dashboard')
} catch (err) {
setError(err.message || 'Registrierung fehlgeschlagen')
} finally {
setLoading(false)
}
}
return (
<div className="auth-container">
<div className="auth-card">
<h2>Konto erstellen</h2>
<form onSubmit={handleSubmit}>
<label>Benutzername
<input type="text" name="username" value={form.username} onChange={handleChange} required minLength={3} maxLength={50} />
</label>
<label>E-Mail
<input type="email" name="email" value={form.email} onChange={handleChange} required />
</label>
<label>Passwort
<input type="password" name="password" value={form.password} onChange={handleChange} required minLength={8} />
</label>
{error && <p className="auth-error">{error}</p>}
<button type="submit" className="btn btn-primary" disabled={loading}>
{loading ? 'Bitte warten…' : 'Registrieren'}
</button>
</form>
<p className="auth-switch">Bereits ein Konto? <Link to="/login">Anmelden</Link></p>
</div>
</div>
)
}

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.topic-page {
max-width: 760px;
margin: 0 auto;
padding: 1.5rem 1rem 4rem;
}
.topic-error, .topic-loading {
text-align: center;
padding: 4rem;
color: #666;
}
.back-link {
color: #6c63ff;
text-decoration: none;
font-size: 0.9rem;
font-weight: 600;
}
.topic-page-header {
margin-bottom: 2rem;
display: flex;
flex-direction: column;
gap: 0.5rem;
}
.topic-page-header h1 {
font-size: 1.8rem;
color: #1a1a2e;
}
.topic-desc {
color: #666;
font-size: 0.95rem;
}
.topic-progress-bar {
height: 8px;
background: #f0f0f0;
border-radius: 4px;
overflow: hidden;
margin-top: 0.5rem;
}
.topic-progress-fill {
height: 100%;
background: linear-gradient(90deg, #6c63ff, #a78bfa);
border-radius: 4px;
transition: width 0.4s ease;
}
.topic-progress-label {
font-size: 0.85rem;
color: #999;
}
.task-list {
display: flex;
flex-direction: column;
gap: 1rem;
}

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import { useEffect, useState } from 'react'
import { useParams, Link } from 'react-router-dom'
import api from '../api/client.js'
import TaskCard from '../components/TaskCard.jsx'
import './TopicPage.css'
export default function TopicPage() {
const { slug } = useParams()
const [data, setData] = useState(null)
const [error, setError] = useState('')
useEffect(() => {
api.get(`/topics/${slug}/tasks`)
.then(setData)
.catch(() => setError('Thema nicht gefunden'))
}, [slug])
if (error) return <div className="topic-error">{error} <Link to="/dashboard">Zurück</Link></div>
if (!data) return <div className="topic-loading">Lade</div>
const solved = data.tasks.filter(t => t.solved === true).length
const total = data.tasks.length
return (
<div className="topic-page">
<div className="topic-page-header">
<Link to="/dashboard" className="back-link"> Dashboard</Link>
<h1>{data.topic.title}</h1>
<p className="topic-desc">{data.topic.description}</p>
<div className="topic-progress-bar">
<div className="topic-progress-fill" style={{ width: `${total ? (solved / total) * 100 : 0}%` }} />
</div>
<span className="topic-progress-label">{solved} / {total} gelöst</span>
</div>
<div className="task-list">
{data.tasks.map(task => (
<TaskCard
key={task.id}
task={task}
onSolved={(result) => {
setData(prev => ({
...prev,
tasks: prev.tasks.map(t => t.id === task.id ? { ...t, solved: result.correct } : t)
}))
}}
/>
))}
</div>
</div>
)
}