fix: Implement real database queries for game API endpoints

- /categories: Query categories from database instead of hardcoded list
- /today-questions: Query approved questions with date_active = today
- /question/{id}: Query specific question from database
- /board/{room_code}: Load board from database if not in Redis

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

backend/app/api/game.py

@@ -15,24 +15,24 @@ router = APIRouter()
 
 
 @router.get("/categories")
-async def get_game_categories():
+async def get_game_categories(db: AsyncSession = Depends(get_db)):
     """Get all categories for the game board."""
-    # Return hardcoded categories for now
-    # In production, these would come from the database
+    result = await db.execute(select(Category).order_by(Category.id))
+    categories = result.scalars().all()
+
     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"},
+        {
+            "id": cat.id,
+            "name": cat.name,
+            "icon": cat.icon,
+            "color": cat.color
+        }
+        for cat in categories
     ]
 
 
 @router.get("/board/{room_code}")
-async def get_game_board(room_code: str):
+async def get_game_board(room_code: str, db: AsyncSession = Depends(get_db)):
     """
     Get the game board with questions for today.
     Returns questions grouped by category.
@@ -47,52 +47,95 @@ async def get_game_board(room_code: str):
     if room.get("board"):
         return room["board"]
 
-    # Otherwise, this would load from database
-    # For now, return empty board structure
-    return {}
+    # Load today's questions from database
+    today = date.today()
+    result = await db.execute(
+        select(Question, Category)
+        .join(Category, Question.category_id == Category.id)
+        .where(Question.date_active == today)
+        .where(Question.status == "approved")
+        .order_by(Category.id, Question.difficulty)
+    )
+    rows = result.all()
+
+    board = {}
+    for question, category in rows:
+        cat_id = str(category.id)
+        if cat_id not in board:
+            board[cat_id] = []
+        board[cat_id].append({
+            "id": question.id,
+            "difficulty": question.difficulty,
+            "points": question.points,
+            "time_seconds": question.time_seconds,
+            "answered": False
+        })
+
+    return board
 
 
 @router.get("/today-questions")
-async def get_today_questions():
+async def get_today_questions(db: AsyncSession = Depends(get_db)):
     """
     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},
-                ]
+    today = date.today()
+
+    # Get all approved questions for today
+    result = await db.execute(
+        select(Question, Category)
+        .join(Category, Question.category_id == Category.id)
+        .where(Question.date_active == today)
+        .where(Question.status == "approved")
+        .order_by(Category.id, Question.difficulty)
+    )
+    rows = result.all()
+
+    categories = {}
+    for question, category in rows:
+        cat_id = str(category.id)
+        if cat_id not in categories:
+            categories[cat_id] = {
+                "name": category.name,
+                "icon": category.icon,
+                "color": category.color,
+                "questions": []
             }
-            # ... other categories
-        }
+        categories[cat_id]["questions"].append({
+            "difficulty": question.difficulty,
+            "id": question.id,
+            "points": question.points
+        })
+
+    return {
+        "date": str(today),
+        "categories": categories
     }
 
 
 @router.get("/question/{question_id}")
-async def get_question(question_id: int):
+async def get_question(question_id: int, db: AsyncSession = Depends(get_db)):
     """
     Get a specific question (without the answer).
     Used when a player selects a question.
     """
-    # This would query the database
-    # For now, return sample
+    result = await db.execute(
+        select(Question).where(Question.id == question_id)
+    )
+    question = result.scalar_one_or_none()
+
+    if not question:
+        raise HTTPException(status_code=404, detail="Question not found")
+
     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
+        "id": question.id,
+        "question_text": question.question_text,
+        "difficulty": question.difficulty,
+        "points": question.points,
+        "time_seconds": question.time_seconds,
+        "category_id": question.category_id,
+        "fun_fact": question.fun_fact
     }