kandev/docs/plans/task-surface-render-isolation/task-03-stabilize-sidebar-rows.md

id, title, status, wave, depends_on, plan, spec, system_design

id	title	status	wave	depends_on	plan	spec	system_design
03-stabilize-sidebar-rows	Stabilize sidebar row inputs	done	3	02-virtualize-file-tree	plan.md	../../specs/ui/requirements/sidebar-task-row-presentation.md	../../specs/ui/system-design/task-surface-render-isolation.md

Task 03: Stabilize sidebar row inputs

Acceptance

• onBulkMove keeps its identity during unrelated sidebar owner renders.
• TaskSwitcher skips an unrelated owner render when its semantic props remain equal.
• A task-row update rerenders the affected row and preserves current selection behavior.
• Fine-pointer trailing content and the mobile primary row action remain unchanged.

This task preserves AC-UI-SIDEBAR-TASK-ROW-PRESENTATION-001.8 and .12. It also preserves AC-UI-MOBILE-TASK-NAVIGATION-001.1, .2, .3, and .7.

TDD sequence

1. Add a failing identity test for onBulkMove.
2. Add a failing render-count test for an unrelated sidebar owner update.
3. Derive the callback from stable action functions and current selection data.
4. Add or refine memoized boundaries only where the failing test requires them.
5. Run the focused selection and task-switcher tests.

Verification

cd apps
rtk pnpm --filter @kandev/web test components/task/task-session-sidebar-selection.test.ts components/task/task-switcher.test.tsx components/task/task-switcher-context-menu.test.tsx
rtk pnpm --filter @kandev/web typecheck

Files likely touched

• apps/web/components/task/task-session-sidebar-selection.tsx
• apps/web/components/task/task-switcher.tsx
• apps/web/components/task/task-switcher-row.tsx
• apps/web/components/task/task-session-sidebar-selection.test.ts
• apps/web/components/task/task-switcher.test.tsx

Dependencies

• Task 02 completes the higher-impact file-tree path before this sidebar refinement.

Inputs

• REQ-UI-SIDEBAR-TASK-ROW-PRESENTATION-001
• REQ-UI-MOBILE-TASK-NAVIGATION-001
• Sidebar Task Row Presentation system design
• Trace evidence for onBulkMove and repeated task-row renders

Output contract

Report the callback dependency change, memoized boundary, render-count result, changed files, focused test results, and remaining risks.