⚡ Bolt: Memoize calendar grid generation

[seonghobae]

💡 What: Wrap grid cell generation in CalendarMonthView with useMemo.
🎯 Why: To prevent O(N) re-renders blocking the main thread during unrelated state updates in React.
📊 Impact: Eliminates unnecessary 35 iterations and element creation per re-render.
🔬 Measurement: Observe less CPU usage and faster renders when interacting with sibling components.

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PR created automatically by Jules for task 16315294690003390252 started by @seonghobae

Summary by CodeRabbit

• Performance Improvements
  • Improved calendar month view responsiveness by reducing unnecessary calendar grid recalculations during unrelated updates.
  • Added memoization to help prevent avoidable rendering work.

[google-labs-jules]

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 555e229a-7792-4c91-a0f5-b0e0922cca27

📥 Commits

Reviewing files that changed from the base of the PR and between eae74e2 and a0851e2.

📒 Files selected for processing (2)

• .jules/bolt.md
• frontend/src/components/calendar/CalendarMonthView.tsx

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📝 Walkthrough

Walkthrough

CalendarMonthView now memoizes its 35-cell calendar grid based on monthEventsByDay, preserving cell rendering and keys. .jules/bolt.md documents the inline JSX array-generation optimization.

Changes

Calendar grid memoization

Layer / File(s)	Summary
Memoized calendar grid rendering frontend/src/components/calendar/CalendarMonthView.tsx, .jules/bolt.md	Calendar grid cells are computed with useMemo and rendered through gridCells; documentation records the same optimization guidance.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• ContextualWisdomLab/naruon#1170: Applies the same useMemo optimization to inline array-to-JSX rendering.
• ContextualWisdomLab/naruon#1191: Documents and implements memoization for JSX array mapping in another render path.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: memoizing calendar grid generation in Bolt.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bolt-memoize-calendar-grid-16315294690003390252

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[github-actions]

PR governance metadata gate update for abf58761b0df4f4bf69b3f0d8e0ca25af9d15852: no current blocking failures remain.

PR governance metadata gate is ready; all current-head requirements passed.

[seonghobae]

Closing after Loop drain: permanently blocked — branch was updated onto develop for mergeability, which cleared prior APPROVED robot evidence; re-review (CodeRabbit/OpenCode) and/or central gate jobs (metadata-only gate evaluation, coverage-evidence) remained pending/stuck without a re-runnable workflow handle. Not force-merging (merge-gate policy). Re-open a focused PR when robot capacity is available. Related product security fixes that reimplemented cleanly remain on branch goal/carddav-path-traversal-decode (#1206) for relaunch.

[google-labs-jules]

Closing after Loop drain: permanently blocked — branch was updated onto develop for mergeability, which cleared prior APPROVED robot evidence; re-review (CodeRabbit/OpenCode) and/or central gate jobs (metadata-only gate evaluation, coverage-evidence) remained pending/stuck without a re-runnable workflow handle. Not force-merging (merge-gate policy). Re-open a focused PR when robot capacity is available. Related product security fixes that reimplemented cleanly remain on branch goal/carddav-path-traversal-decode (#1206) for relaunch.

Understood. Acknowledging that this work is now obsolete and stopping work on this task.

[seonghobae]

Closing as a functional duplicate of #1207. Both current heads are based on develop@5f5d04a and memoize the same 35 CalendarMonthView cells with the same monthEventsByDay dependency; the resulting source differs only in the local variable name and comments. #1207 is the smaller current implementation (22 additions / 13 deletions, 2 commits versus 25 / 13, 4 commits) and retains the same behavior and green current-head checks. Continue review and merge work on #1207.

[google-labs-jules]

Closing as a functional duplicate of #1207. Both current heads are based on develop@5f5d04a and memoize the same 35 CalendarMonthView cells with the same monthEventsByDay dependency; the resulting source differs only in the local variable name and comments. #1207 is the smaller current implementation (22 additions / 13 deletions, 2 commits versus 25 / 13, 4 commits) and retains the same behavior and green current-head checks. Continue review and merge work on #1207.

Understood. Acknowledging that this work is now obsolete as a duplicate of #1207, and stopping work on this task.