feat: add progression models and service structure

apps/achievements/models.py

@@ -1,3 +1,73 @@
+# apps/achivements/models.py
+
+import uuid
+
+from django.conf import settings
 from django.db import models
 
 # Create your models here.
+class Achievement(models.Model):
+    class RuleType(models.TextChoices):
+        TASK_COUNT = "task_count", "Nombre de réalisations"
+        SKILL_XP = "skill_xp", "XP dans une compétence"
+        TREE_XP = "tree_xp", "XP dans un arbre"
+        TOTAL_XP = "total_xp", "XP total"
+        DISTINCT_TASKS = "distinct_tasks", "Tâches différentes"
+
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    slug = models.SlugField(max_length=100, unique=True)
+    name = models.CharField(max_length=160)
+    description = models.TextField(blank=True)
+    icon = models.CharField(max_length=80, blank=True)
+
+    rule_type = models.CharField(max_length=32, choices=RuleType.choices)
+    rule_config = models.JSONField(default=dict)
+
+    xp_reward = models.PositiveIntegerField(default=0)
+    is_secret = models.BooleanField(default=False)
+    is_active = models.BooleanField(default=True)
+
+
+class PlayerAchievement(models.Model):
+    player = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="achievements",
+    )
+    achievement = models.ForeignKey(
+        Achievement,
+        on_delete=models.CASCADE,
+        related_name="players",
+    )
+    unlocked_at = models.DateTimeField(auto_now_add=True)
+    progress_snapshot = models.JSONField(default=dict)
+
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(
+                fields=("player", "achievement"),
+                name="unique_player_achievement",
+            )
+        ]
+
+
+class Title(models.Model):
+    slug = models.SlugField(max_length=100, unique=True)
+    name = models.CharField(max_length=120)
+    description = models.TextField(blank=True)
+    achievement = models.OneToOneField(
+        Achievement,
+        on_delete=models.CASCADE,
+        related_name="title",
+    )
+
+
+class PlayerTitle(models.Model):
+    player = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="titles",
+    )
+    title = models.ForeignKey(Title, on_delete=models.CASCADE)
+    unlocked_at = models.DateTimeField(auto_now_add=True)
+    is_equipped = models.BooleanField(default=False)