first ruggedy draft

.env.example

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+MOUSEHOLD_DATABASE_URL=sqlite:///./data/mousehold.db
+MOUSEHOLD_CORS_ORIGINS=["http://localhost:5173","http://127.0.0.1:5173"]
+MOUSEHOLD_LOCAL_AGENT_TOKEN=dev-local-agent-token
+MOUSEHOLD_LOCAL_AGENT_CORS_ORIGINS=http://127.0.0.1:5173,http://localhost:5173
+
+# Local agent only. Do not put production secrets in shared env files.
+MOUSEHOLD_IMAP_HOST=imap.example.com
+MOUSEHOLD_IMAP_USERNAME=you@example.com
+MOUSEHOLD_IMAP_PASSWORD=app-password
+MOUSEHOLD_IMAP_FOLDER=INBOX
+MOUSEHOLD_IMAP_SENDER_FILTERS=klarna,paypal,bestellung,order,invoice
+
+# Local agent FinTS connector. Prefer prompt over storing PIN in .env.
+MOUSEHOLD_FINTS_BLZ=43060967
+MOUSEHOLD_FINTS_SERVER=https://fints.example-bank.de/fints
+MOUSEHOLD_FINTS_USER_ID=your-bank-login-id
+MOUSEHOLD_FINTS_CUSTOMER_ID=
+MOUSEHOLD_FINTS_PIN=
+MOUSEHOLD_FINTS_TAN_MECHANISM=
+MOUSEHOLD_FINTS_TAN_MEDIUM=
+MOUSEHOLD_FINTS_PRODUCT_ID=your-registered-fints-product-id
+MOUSEHOLD_FINTS_PRODUCT_VERSION=0.1.0