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Fleet.vue's useFleetData() (60s telemetry.fleet-status/-alerts poll), Server.vue's FipsNetworkCard.vue (15s fips.status poll), and Web5.vue's Web5Monitoring.vue (30s system.stats poll — redundant with Home.vue's own correctly-gated 10s poll of the same store) all armed their setInterval in onMounted and only disarmed it in onUnmounted/ onBeforeUnmount. That was harmless before 02-04 registered their owning views in KEEP_ALIVE_PATHS (the view was destroyed on every tab-away, so the teardown hook fired every time); once KeepAlive keeps the instance alive, the teardown hook never fires again and the poll ran forever in the background regardless of which dashboard tab was showing. Gated arm/disarm to onActivated/onDeactivated, mirroring Server.vue's own vpnPollInterval fix from 02-04 exactly. Added regression tests to keepAliveLifecycle.test.ts mounting each real component under a synthetic KeepAlive with fake timers; confirmed RED against the pre-fix code (git stash) before confirming GREEN with the fix restored. Full suite (95 files/788 tests), type-check and build all green. keepAliveTabs.test.ts is byte-for-byte unmodified. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>