feat: persönlichere Profilseite + iOS-App-Setup

Profil: Begrüßung in Zielsprache, Kategorie-Punkte-Übersicht,
ruhigerer Header (kein rotierender Avatar/Online-Dot), Notch-Fix
und kompaktere Aktivitäts-Heatmap. Außerdem Capacitor-iOS-Projekt
und diverse Auth/Feed/Audio-Verbesserungen aus dem Premium-Redesign.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/context/AuthContext.jsx

@@ -1,23 +1,35 @@
 import { createContext, useContext, useState, useEffect } from 'react'
 import { getMe } from '../api/directus'
+import { getStoredToken, setStoredToken, clearStoredToken } from '../utils/secureToken'
 
 const AuthContext = createContext(null)
 
 export function AuthProvider({ children }) {
-  const [token, setToken] = useState(() => localStorage.getItem('hejyou_token'))
+  const [token, setToken] = useState(null)
   const [user, setUser] = useState(null)
   const [loading, setLoading] = useState(true)
+  const [bootstrapped, setBootstrapped] = useState(false)
 
+  // Token einmalig aus dem sicheren Speicher laden (inkl. Migration aus localStorage).
   useEffect(() => {
+    getStoredToken()
+      .then(setToken)
+      .catch(() => setToken(null))
+      .finally(() => setBootstrapped(true))
+  }, [])
+
+  // Profil laden, sobald der Token bekannt ist.
+  useEffect(() => {
+    if (!bootstrapped) return
     if (!token) { setLoading(false); return }
     getMe(token)
       .then(setUser)
-      .catch(() => { localStorage.removeItem('hejyou_token'); setToken(null) })
+      .catch(() => { clearStoredToken(); setToken(null) })
       .finally(() => setLoading(false))
-  }, [token])
+  }, [token, bootstrapped])
 
-  const saveToken = (t) => { localStorage.setItem('hejyou_token', t); setToken(t) }
-  const logout = () => { localStorage.removeItem('hejyou_token'); setToken(null); setUser(null) }
+  const saveToken = async (t) => { await setStoredToken(t); setToken(t) }
+  const logout = async () => { await clearStoredToken(); setToken(null); setUser(null) }
 
   return (
     <AuthContext.Provider value={{ token, user, setUser, saveToken, logout, loading }}>