aiomqtt/paho exception strings can include the broker URI with embedded
credentials (mqtt://user:pass@host) or auth detail. The 502 response
from /import and the message field on /test-connection echoed these
verbatim via str(exc).
- Add _sanitize_mqtt_error() that maps known patterns (auth, refused,
DNS, TLS, timeout) to coarse, credential-free categories
- Original exception still logged at WARNING level for operator debug
- Drop hostname:port from TimeoutError messages
- /test-connection unexpected-error path no longer interpolates exc
Tests: 6 new (auth/refused/DNS/TLS/unknown sanitization, end-to-end
fetch_networkmap leak check).
- Schema: mqtt_tls + mqtt_tls_insecure flags on import + test-connection
requests; model_validator enforces insecure requires tls
- Service: _build_tls_context() using ssl.create_default_context();
logger.warning when verification disabled; tls_context plumbed into
aiomqtt.Client for both fetch_networkmap and test_mqtt_connection
- Route: passes tls flags through to service
- Frontend: TLS checkbox auto-toggles port 1883<->8883 unless user
edited; insecure checkbox disabled until TLS on, red-tinted; password
field marked autocomplete=new-password
- Tests: 7 new backend tests (TLS context build, client kwargs assertion,
router happy path, insecure-without-tls 422)
Pouzor