feat: Initial project structure for WebTriviasMulti

- Backend: FastAPI + Python-SocketIO + SQLAlchemy
  - Models for categories, questions, game sessions, events
  - AI services for answer validation and question generation (Claude)
  - Room management with Redis
  - Game logic with stealing mechanics
  - Admin API for question management

- Frontend: React + Vite + TypeScript + Tailwind
  - 5 visual themes (DRRR, Retro, Minimal, RGB, Anime 90s)
  - Real-time game with Socket.IO
  - Achievement system
  - Replay functionality
  - Sound effects per theme

- Docker Compose for deployment
- Design documentation

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

backend/app/api/game.py

@@ -0,0 +1,119 @@
+from fastapi import APIRouter, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+from datetime import date
+from typing import Dict, List
+
+from app.models.base import get_db
+from app.models.question import Question
+from app.models.category import Category
+from app.schemas.game import RoomCreate, RoomJoin, GameState
+
+router = APIRouter()
+
+
+@router.get("/categories")
+async def get_game_categories():
+    """Get all categories for the game board."""
+    # Return hardcoded categories for now
+    # In production, these would come from the database
+    return [
+        {"id": 1, "name": "Nintendo", "icon": "🍄", "color": "#E60012"},
+        {"id": 2, "name": "Xbox", "icon": "🎮", "color": "#107C10"},
+        {"id": 3, "name": "PlayStation", "icon": "🎯", "color": "#003791"},
+        {"id": 4, "name": "Anime", "icon": "⛩️", "color": "#FF6B9D"},
+        {"id": 5, "name": "Música", "icon": "🎵", "color": "#1DB954"},
+        {"id": 6, "name": "Películas", "icon": "🎬", "color": "#F5C518"},
+        {"id": 7, "name": "Libros", "icon": "📚", "color": "#8B4513"},
+        {"id": 8, "name": "Historia-Cultura", "icon": "🏛️", "color": "#6B5B95"},
+    ]
+
+
+@router.get("/board/{room_code}")
+async def get_game_board(room_code: str):
+    """
+    Get the game board with questions for today.
+    Returns questions grouped by category.
+    """
+    from app.services.room_manager import room_manager
+
+    room = await room_manager.get_room(room_code)
+    if not room:
+        raise HTTPException(status_code=404, detail="Room not found")
+
+    # If board already exists in room, return it
+    if room.get("board"):
+        return room["board"]
+
+    # Otherwise, this would load from database
+    # For now, return empty board structure
+    return {}
+
+
+@router.get("/today-questions")
+async def get_today_questions():
+    """
+    Get all approved questions for today, grouped by category and difficulty.
+    This is used to build the game board.
+    """
+    # This would query the database for questions with date_active = today
+    # For now, return sample structure
+    return {
+        "date": str(date.today()),
+        "categories": {
+            "1": {  # Nintendo
+                "name": "Nintendo",
+                "questions": [
+                    {"difficulty": 1, "id": 1, "points": 100},
+                    {"difficulty": 2, "id": 2, "points": 200},
+                    {"difficulty": 3, "id": 3, "points": 300},
+                    {"difficulty": 4, "id": 4, "points": 400},
+                    {"difficulty": 5, "id": 5, "points": 500},
+                ]
+            }
+            # ... other categories
+        }
+    }
+
+
+@router.get("/question/{question_id}")
+async def get_question(question_id: int):
+    """
+    Get a specific question (without the answer).
+    Used when a player selects a question.
+    """
+    # This would query the database
+    # For now, return sample
+    return {
+        "id": question_id,
+        "question_text": "¿En qué año se lanzó la primera consola Nintendo Entertainment System (NES) en Japón?",
+        "difficulty": 3,
+        "points": 300,
+        "time_seconds": 25,
+        "category_id": 1
+    }
+
+
+@router.get("/achievements")
+async def get_achievements():
+    """Get list of all available achievements."""
+    return [
+        {"id": 1, "name": "Primera Victoria", "description": "Ganar tu primera partida", "icon": "🏆"},
+        {"id": 2, "name": "Racha de 3", "description": "Responder 3 correctas seguidas", "icon": "🔥"},
+        {"id": 3, "name": "Racha de 5", "description": "Responder 5 correctas seguidas", "icon": "🔥🔥"},
+        {"id": 4, "name": "Ladrón Novato", "description": "Primer robo exitoso", "icon": "🦝"},
+        {"id": 5, "name": "Ladrón Maestro", "description": "5 robos exitosos en una partida", "icon": "🦝👑"},
+        {"id": 6, "name": "Especialista Nintendo", "description": "10 correctas en Nintendo", "icon": "🍄"},
+        {"id": 7, "name": "Especialista Xbox", "description": "10 correctas en Xbox", "icon": "🎮"},
+        {"id": 8, "name": "Especialista PlayStation", "description": "10 correctas en PlayStation", "icon": "🎯"},
+        {"id": 9, "name": "Especialista Anime", "description": "10 correctas en Anime", "icon": "⛩️"},
+        {"id": 10, "name": "Especialista Música", "description": "10 correctas en Música", "icon": "🎵"},
+        {"id": 11, "name": "Especialista Películas", "description": "10 correctas en Películas", "icon": "🎬"},
+        {"id": 12, "name": "Especialista Libros", "description": "10 correctas en Libros", "icon": "📚"},
+        {"id": 13, "name": "Especialista Historia", "description": "10 correctas en Historia-Cultura", "icon": "🏛️"},
+        {"id": 14, "name": "Invicto", "description": "Ganar sin fallar ninguna pregunta", "icon": "⭐"},
+        {"id": 15, "name": "Velocista", "description": "Responder correctamente en menos de 3 segundos", "icon": "⚡"},
+        {"id": 16, "name": "Comeback", "description": "Ganar estando 500+ puntos abajo", "icon": "🔄"},
+        {"id": 17, "name": "Dominio Total", "description": "Responder las 5 preguntas de una categoría", "icon": "👑"},
+        {"id": 18, "name": "Arriesgado", "description": "Responder correctamente 3 preguntas de 500 pts", "icon": "🎰"},
+    ]