* feat: add Apprise as a fourth notification channel
Support keyed and stateless Apprise endpoints with secret-safe public DTOs, fail-closed malformed config, and mode-specific Settings UI. Docs and screenshots updated for four-channel Channels and routing.
* fix: harden Apprise secrets at rest and preserve-on-write saves
Encrypt Apprise endpoint and config with CryptoService so a downgrade cannot leak via SELECT *. Align channel and routing saves so blank destination fields omit config on same-mode URL edits, enforce keyed notify IDs, and keep secrets_redacted truthful.
* fix: harden Apprise route type changes and mixed-version config UI
Require a raw channel_url when switching notification-route types so ciphertext cannot strand under Discord/Slack/webhook. Default missing remote apprise status, replace Channels state on node switch, and exercise the production config-column migrator.
* fix: tolerate stub fleet configuration payloads without agents
Normalize remote Apprise agent status only when notifications.agents is present so successful Pilot/stub fetches stay online instead of throwing into the offline catch path.
* fix: correct TypeScript in configuration normalize tests
* fix: ignore stale Channels agent bodies after node switch
Compare the active node after response JSON parsing so a slow body
cannot overwrite the newly selected node's channel state.
* fix: isolate corrupt Apprise crypto and keep keyed Tags visible
Decrypt failures on one Apprise row no longer 500 agent/route lists or
suppress sibling channel dispatch. Treat public /notify/<redacted> as keyed
so Tags remain editable after reload.
Anso