Initial MVP: local visual novel library with Ren'Py → PGVN converter

- FastAPI backend: admin bootstrap with forced credential change, admin-created
  users with one-time generated passwords, roles as permission sets
- Games and versions with content-addressed blob storage; forks copy only the
  manifest, so mods share assets with the original
- Worker: archive/RPA extraction, unrpyc for .rpyc, own .rpy parser, Python
  subset translated via ast, media converted to WebP/Opus/WebM
- React panel (library search, game page, upload, users, roles) and a
  framework-free web player with saves, history, skip/auto, transitions
- docker compose: postgres, backend, worker, nginx on a single HTTP port

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/app/config.py

@@ -0,0 +1,36 @@
+from functools import lru_cache
+from pathlib import Path
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file=".env", extra="ignore")
+
+    database_url: str = "postgresql+asyncpg://pgames:pgames@db:5432/pgames"
+    data_dir: Path = Path("/data")
+    secret_key: str = "change-me"
+    session_ttl_hours: int = 24 * 14
+    cookie_secure: bool = False
+    admin_username: str = "admin"
+    admin_password: str = "admin"
+    worker_poll_seconds: float = 2.0
+    worker_threads: int = 4
+    unrpyc_path: Path = Path("/opt/unrpyc/unrpyc.py")
+
+    @property
+    def blobs_dir(self) -> Path:
+        return self.data_dir / "blobs"
+
+    @property
+    def uploads_dir(self) -> Path:
+        return self.data_dir / "uploads"
+
+    @property
+    def work_dir(self) -> Path:
+        return self.data_dir / "work"
+
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()