auto-claude: 203-fix-ui-not-updating-during-pr-review-operations (#1733)

* auto-claude: subtask-1-1 - Replace blanket prReviews subscription with targeted selector

- Replace blanket prReviews subscription with targeted selector for selected PR
- Optimize selectedPRReviewState to only subscribe to specific PR's state changes
- Convert activePRReviews to use direct selector instead of useMemo
- Remove unnecessary prReviews dependency from getReviewStateForPR callback
- Reduces unnecessary re-renders when unrelated PR states change

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* fix: resolve PR review selector issues causing stale filtering and excess re-renders

- Restore prReviews dependency in getReviewStateForPR so usePRFiltering's
  memoized filteredPRs recomputes when review states change (fixes status
  filter not updating after review completion)
- Replace activePRReviews inline Zustand selector with useMemo to avoid
  creating new array references on every store change (the .filter().map()
  chain defeated Object.is equality, causing unnecessary re-renders)
- Read prReviews directly in both hooks instead of using store methods,
  making dependencies explicit and satisfying exhaustive-deps lint rule

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Test User <test@example.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

apps/frontend/src/renderer/components/github-prs/hooks/useGitHubPRs.ts

@@ -95,16 +95,17 @@ export function useGitHubPRs(
   const fetchGenerationRef = useRef(0);
 
   // Get PR review state from the global store
-  const _prReviews = usePRReviewStore((state) => state.prReviews);
+  const prReviews = usePRReviewStore((state) => state.prReviews);
   const getPRReviewState = usePRReviewStore((state) => state.getPRReviewState);
-  const getActivePRReviews = usePRReviewStore((state) => state.getActivePRReviews);
   const setNewCommitsCheckAction = usePRReviewStore((state) => state.setNewCommitsCheck);
 
-  // Get review state for the selected PR from the store
-  const selectedPRReviewState = useMemo(() => {
+  // Get review state for the selected PR from the store - optimized with targeted selector
+  // Only subscribes to changes for this specific PR, not all PRs
+  const selectedPRReviewState = usePRReviewStore((state) => {
     if (!projectId || selectedPRNumber === null) return null;
-    return getPRReviewState(projectId, selectedPRNumber);
-  }, [projectId, selectedPRNumber, getPRReviewState]);
+    const key = `${projectId}:${selectedPRNumber}`;
+    return state.prReviews[key] || null;
+  });
 
   // Derive values from store state - all from the same source to ensure consistency
   const reviewResult = selectedPRReviewState?.result ?? null;
@@ -116,14 +117,19 @@ export function useGitHubPRs(
   // Get list of PR numbers currently being reviewed
   const activePRReviews = useMemo(() => {
     if (!projectId) return [];
-    return getActivePRReviews(projectId).map((review) => review.prNumber);
-  }, [projectId, getActivePRReviews]);
+    return Object.values(prReviews)
+      .filter((review) => review.projectId === projectId && review.isReviewing)
+      .map((review) => review.prNumber);
+  }, [projectId, prReviews]);
 
   // Helper to get review state for any PR
+  // Reads directly from prReviews so the callback invalidates when any review state changes,
+  // which is needed for usePRFiltering's memoized filteredPRs to recompute correctly
   const getReviewStateForPR = useCallback(
     (prNumber: number) => {
       if (!projectId) return null;
-      const state = getPRReviewState(projectId, prNumber);
+      const key = `${projectId}:${prNumber}`;
+      const state = prReviews[key];
       if (!state) return null;
       return {
         isReviewing: state.isReviewing,
@@ -135,7 +141,7 @@ export function useGitHubPRs(
         newCommitsCheck: state.newCommitsCheck,
       };
     },
-    [projectId, getPRReviewState]
+    [projectId, prReviews]
   );
 
   // Use detailed PR data if available (includes files), otherwise fall back to list data