The folder and tag section gears in the sidebar deep-linked into Settings by writing the persisted `settings-active-tab` localStorage key, so the chosen section became the permanent default the main Settings button opened on - indefinitely.
Compounding it, the desktop Settings tab list called setActiveTab directly without persisting, so normal navigation never updated the default and the hijacked value could never self-correct.
Fix: section gears now write a one-shot sessionStorage key that is consumed on mount (transient deep-link, no persistence); desktop tab clicks go through handleTabSelect like the mobile list, so the last-used tab is saved consistently. Stale/removed tab IDs are still caught by the existing effectiveActiveTab fallback.
