Ajout des applications blog et progression avec modèles, vues, URLs et intégration dans le sitemap et les configurations du projet.

progression/models.py

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+from django.db import models
+from django.conf import settings
+
+class Progression(models.Model):
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='progress')
+    course = models.ForeignKey('courses.Course', on_delete=models.CASCADE, related_name='user_progress')
+    completed_lessons = models.ManyToManyField('courses.Lesson', blank=True, related_name='completed_by')
+    last_viewed_lesson = models.ForeignKey('courses.Lesson', on_delete=models.SET_NULL, null=True, blank=True, related_name='last_viewed_by')
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        unique_together = ('user', 'course')
+        verbose_name = "Progression du cours"
+
+    def __str__(self):
+        return f"{self.user} - {self.course.name}"
+
+    @property
+    def percent_completed(self):
+        from courses.models import Lesson
+        total_lessons = Lesson.objects.filter(module__course=self.course).count()
+        if total_lessons == 0:
+            return 0
+
+        completed_lessons = self.completed_lessons.count()
+
+        return int((completed_lessons / total_lessons) * 100)