Add Phase 1 MVP: D&D text-adventure server

FastAPI + Postgres backend with fastapi-users auth, games/characters
CRUD, and a WebSocket chat endpoint where an x.ai Grok DM narrates
play, rolls dice, and maintains character sheets via tool calls.
React + Tailwind frontend covers registration/login, game list and
creation, participation-code join flow, character viewer, and a
real-time chat session view. Docker Compose skeleton (Postgres +
backend) included; Caddy/frontend container wiring is deferred to
the deploy milestone.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

backend/app/api/routes_characters.py

@@ -0,0 +1,42 @@
+import uuid
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.auth.users import current_active_user
+from app.db import get_async_session
+from app.models.character import Character
+from app.models.user import User
+from app.schemas.character import CharacterRead
+
+router = APIRouter(prefix="/api/characters", tags=["characters"])
+
+
+@router.get("", response_model=list[CharacterRead])
+async def list_my_characters(
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+) -> list[Character]:
+    characters = (
+        await session.execute(
+            select(Character)
+            .where(Character.owner_id == user.id)
+            .order_by(Character.created_at.desc())
+        )
+    ).scalars().all()
+    return list(characters)
+
+
+@router.get("/{character_id}", response_model=CharacterRead)
+async def get_character(
+    character_id: uuid.UUID,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+) -> Character:
+    character = await session.get(Character, character_id)
+    if character is None:
+        raise HTTPException(status_code=404, detail="Character not found")
+    if character.owner_id != user.id:
+        raise HTTPException(status_code=403, detail="Not your character")
+    return character