silo/dashboard: hoist feedLoaded/telemetryLoaded past setTab call
setTab(activeTab) runs synchronously during tab wiring, before the
`let feedLoaded` / `let telemetryLoaded` declarations further down
in the script. If activeTab was 6 (feed) or 7 (telemetry) from a
cached silo-tab localStorage value, the short-circuit check
`!feedLoaded` hit the temporal-dead-zone and threw:
Uncaught ReferenceError: Cannot access 'feedLoaded'
before initialization
Moved both declarations up to sit above setTab, leaving comment
stubs at the old sites.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>