feat: add Goldfish Recap YouTube summary PWA

YouTube subtitles via OpenRouter become persistent, shareable recaps
with timestamp jump links, PIN-protected creation, and Traefik deploy.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/settings.py

@@ -0,0 +1,22 @@
+from __future__ import annotations
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8", extra="ignore")
+
+    app_pin: str = "1234"
+    jwt_secret: str = "dev-secret-change-me"
+    jwt_expire_days: int = 90
+
+    openrouter_api_key: str = ""
+    openrouter_model: str = "google/gemini-2.5-flash"
+
+    db_path: str = "data/ytrecap.sqlite"
+    public_dir: str = "public"
+    app_url: str = "http://localhost:8000"
+    app_version: str = "1.0.0"
+
+
+settings = Settings()  # type: ignore[call-arg]