feat(phase2): Add achievements and replay systems

Achievement System:
- Add Achievement model with condition types (streak, steal, specialist, etc.)
- Add AchievementManager service for tracking and awarding achievements
- Add Pydantic schemas for achievements (AchievementResponse, PlayerStats, etc.)
- Seed 18 achievements from design doc
- Add GET /api/game/achievements endpoint

Replay System:
- Add ReplayManager service for saving/loading game replays
- Add GET /api/replay/{code} and /api/replay/session/{id} endpoints
- Format replays for frontend consumption

Phase 2 tasks completed:
- F2.1: Achievement model and migration
- F2.2: Pydantic schemas
- F2.3: AchievementManager service
- F2.4: ReplayManager service
- F2.5: API endpoints
- F2.6: Seed 18 achievements data

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/scripts/seed_achievements.py

@@ -0,0 +1,176 @@
+import asyncio
+import sys
+sys.path.insert(0, '/root/WebTriviasMulti/backend')
+
+from sqlalchemy import select
+from app.models.base import get_async_session
+from app.models.achievement import Achievement
+
+ACHIEVEMENTS = [
+    {
+        "name": "Primera Victoria",
+        "description": "Gana tu primera partida",
+        "icon": "🏆",
+        "condition_type": "first_win",
+        "condition_value": 1,
+        "category_id": None
+    },
+    {
+        "name": "Racha de 3",
+        "description": "Responde 3 correctas seguidas",
+        "icon": "🔥",
+        "condition_type": "streak",
+        "condition_value": 3,
+        "category_id": None
+    },
+    {
+        "name": "Racha de 5",
+        "description": "Responde 5 correctas seguidas",
+        "icon": "🔥🔥",
+        "condition_type": "streak",
+        "condition_value": 5,
+        "category_id": None
+    },
+    {
+        "name": "Ladrón Novato",
+        "description": "Primer robo exitoso",
+        "icon": "🦝",
+        "condition_type": "steal_success",
+        "condition_value": 1,
+        "category_id": None
+    },
+    {
+        "name": "Ladrón Maestro",
+        "description": "5 robos exitosos en una partida",
+        "icon": "🦝👑",
+        "condition_type": "steal_success",
+        "condition_value": 5,
+        "category_id": None
+    },
+    {
+        "name": "Especialista Nintendo",
+        "description": "10 correctas en Nintendo",
+        "icon": "🍄",
+        "condition_type": "category_specialist",
+        "condition_value": 10,
+        "category_id": 1
+    },
+    {
+        "name": "Especialista Xbox",
+        "description": "10 correctas en Xbox",
+        "icon": "🎮",
+        "condition_type": "category_specialist",
+        "condition_value": 10,
+        "category_id": 2
+    },
+    {
+        "name": "Especialista PlayStation",
+        "description": "10 correctas en PlayStation",
+        "icon": "🎯",
+        "condition_type": "category_specialist",
+        "condition_value": 10,
+        "category_id": 3
+    },
+    {
+        "name": "Especialista Anime",
+        "description": "10 correctas en Anime",
+        "icon": "⛩️",
+        "condition_type": "category_specialist",
+        "condition_value": 10,
+        "category_id": 4
+    },
+    {
+        "name": "Especialista Música",
+        "description": "10 correctas en Música",
+        "icon": "🎵",
+        "condition_type": "category_specialist",
+        "condition_value": 10,
+        "category_id": 5
+    },
+    {
+        "name": "Especialista Películas",
+        "description": "10 correctas en Películas",
+        "icon": "🎬",
+        "condition_type": "category_specialist",
+        "condition_value": 10,
+        "category_id": 6
+    },
+    {
+        "name": "Especialista Libros",
+        "description": "10 correctas en Libros",
+        "icon": "📚",
+        "condition_type": "category_specialist",
+        "condition_value": 10,
+        "category_id": 7
+    },
+    {
+        "name": "Especialista Historia",
+        "description": "10 correctas en Historia-Cultura",
+        "icon": "🏛️",
+        "condition_type": "category_specialist",
+        "condition_value": 10,
+        "category_id": 8
+    },
+    {
+        "name": "Invicto",
+        "description": "Gana sin fallar ninguna pregunta",
+        "icon": "⭐",
+        "condition_type": "perfect_game",
+        "condition_value": 1,
+        "category_id": None
+    },
+    {
+        "name": "Velocista",
+        "description": "Responde correctamente en menos de 3 segundos",
+        "icon": "⚡",
+        "condition_type": "fast_answer",
+        "condition_value": 3,
+        "category_id": None
+    },
+    {
+        "name": "Comeback",
+        "description": "Gana estando 500+ puntos abajo",
+        "icon": "🔄",
+        "condition_type": "comeback",
+        "condition_value": 500,
+        "category_id": None
+    },
+    {
+        "name": "Dominio Total",
+        "description": "Responde las 5 preguntas de una categoría correctamente",
+        "icon": "👑",
+        "condition_type": "category_sweep",
+        "condition_value": 5,
+        "category_id": None
+    },
+    {
+        "name": "Arriesgado",
+        "description": "Responde correctamente 3 preguntas de 500 pts",
+        "icon": "🎰",
+        "condition_type": "high_stakes",
+        "condition_value": 3,
+        "category_id": None
+    },
+]
+
+
+async def seed_achievements():
+    AsyncSessionLocal = get_async_session()
+    async with AsyncSessionLocal() as session:
+        # Verificar si ya existen
+        result = await session.execute(select(Achievement))
+        if result.scalars().first():
+            print("Achievements ya existen, saltando seed...")
+            return
+
+        # Insertar achievements
+        for data in ACHIEVEMENTS:
+            achievement = Achievement(**data)
+            session.add(achievement)
+
+        await session.commit()
+        print(f"Insertados {len(ACHIEVEMENTS)} achievements")
+
+
+if __name__ == "__main__":
+    asyncio.run(seed_achievements())