Reduce provider update pill rerenders

[cursor]

What Changed

• Reworked SidebarProviderUpdatePill so the initial provider-status cutoff is kept in a ref instead of mirrored through state/effect.
• Moved transition-only bookkeeping (pendingView, dismiss-after-exit key) into refs inside a named display hook so those values do not schedule renders themselves.
• Moved remaining necessary effects into named hooks for display transition synchronization and auto-dismiss timing.

Why

react-doctor flagged this component for derived state and handler-only state that could cause avoidable rerenders. After the change, the targeted component diagnostics dropped from 11 to 6, including removal of the handler-only state warnings and the visibleAfterIso derived-state warning.

React Scan recordings were captured with a temporary Vite harness and the React Scan script enabled:

• Before: /workspace/artifacts/react-scan/sidebar-provider-update-before.webm
• After: /workspace/artifacts/react-scan/sidebar-provider-update-after.webm

UI Changes

No intended visual changes. The before/after videos above exercise the provider update pill loading-to-success transition with React Scan enabled.

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

Verification:

• bun fmt
• bun lint
• bun typecheck
• bunx react-doctor --full --no-score --json apps/web

  

Note

Reduce rerenders in SidebarProviderUpdatePill by extracting hooks

Refactors SidebarProviderUpdatePill.tsx to move stateful logic into three dedicated hooks, replacing component state with refs where possible to avoid unnecessary rerenders.

• useProviderUpdateVisibleAfterIso captures the initial visibleAfter timestamp in a ref so it stays stable across renders
• useDisplayedProviderUpdatePill manages view transition and exit logic using refs for pending state instead of component state
• useProviderUpdateAutoDismiss encapsulates the auto-dismiss timeout, replacing an inline effect

^{Macroscope summarized 8b2adcc. (Automatic summaries will resume when PR exits draft mode or review begins).}