WebAuthn biometric + PWA widget + UI header fixes + mobile responsive

- WebAuthn: register/auth options, device management
- PWA widget page + manifest shortcuts
- Group schedule endpoint (timezones + locations)
- UI #3-#6: compact headers on tasks/calendar/projects/goals
- UI #9: mobile responsive top bars
- webauthn_credentials table

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/tasks/app/widget/page.tsx

@@ -0,0 +1,25 @@
+'use client';
+import { useEffect, useState } from 'react';
+
+export default function WidgetPage() {
+    const [tasks, setTasks] = useState<any[]>([]);
+    useEffect(() => {
+        const token = localStorage.getItem('taskteam_token');
+        if (token) {
+            fetch('/api/v1/tasks?limit=5&status=pending', { headers: { Authorization: 'Bearer ' + token } })
+                .then(r => r.json()).then(d => setTasks(d.data || []));
+        }
+    }, []);
+    return (
+        <div style={{ padding: 8, background: '#0F172A', minHeight: '100vh', color: 'white', fontSize: 14 }}>
+            <div style={{ fontWeight: 'bold', marginBottom: 8 }}>Task Team</div>
+            {tasks.map(t => (
+                <div key={t.id} style={{ padding: '6px 0', borderBottom: '1px solid #1E293B', display: 'flex', gap: 8, alignItems: 'center' }}>
+                    <span style={{ width: 8, height: 8, borderRadius: '50%', background: t.status === 'in_progress' ? '#F59E0B' : '#6B7280', flexShrink: 0 }} />
+                    <span style={{ overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>{t.title}</span>
+                </div>
+            ))}
+            {!tasks.length && <div style={{ opacity: 0.5 }}>Zadne ukoly</div>}
+        </div>
+    );
+}