feat: Lernapp mit Mathe/Deutsch/Englisch, Münzsystem und Belohnungen

app/Models/Question.php

@@ -0,0 +1,13 @@
+<?php
+namespace App\Models;
+use Illuminate\Database\Eloquent\Model;
+class Question extends Model {
+    protected $fillable = ['subject_id','question_text','type','difficulty','points_value','active'];
+    protected $casts = ['active' => 'boolean'];
+    public function subject() { return $this->belongsTo(Subject::class); }
+    public function answerOptions() { return $this->hasMany(AnswerOption::class)->orderBy('sort_order'); }
+    public function attempts() { return $this->hasMany(QuestionAttempt::class); }
+    public function difficultyStars(): string {
+        return str_repeat('⭐', $this->difficulty);
+    }
+}