Desktop notifications now carry a narrow target payload so clicking a permission, completion, or scheduled-task notification can reopen the matching tab and reconnect the session. macOS uses the native notification bridge for tap callbacks, while the shared desktop notification layer also accepts plugin action payloads where the platform exposes them.
Constraint: Notification clicks need to activate existing desktop tabs without adding a new navigation state channel.
Rejected: Store only notification ids and infer the active session later | stale notifications would point at the wrong session after tab changes.
Confidence: high
Scope-risk: moderate
Directive: Keep notification targets serializable and versioned through desktopNotifications before adding new target types.
Tested: bun run quality:pr with ALLOW_CLI_CORE_CHANGE=1; desktop unit tests; server tests; native sidecar build and cargo check; docs build.
Not-tested: Packaged Windows toast activation runtime; current fallback depends on Tauri notification action delivery.
