kandev/docs/plans/task-title-caret/task-01-regression-e2e.md

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

id	title	status	wave	depends_on	plan	spec
01-regression-e2e	Write failing regression tests for the caret jump	done	1		plan.md	../../specs/tasks/requirements/title-length-limit.md

Task 01: Write failing regression tests for the caret jump

Acceptance

• apps/web/e2e/tests/kanban/task-title-caret.spec.ts exists with two desktop tests (edit dialog, rename dialog) that seed a 60-character task title, place the caret at position 6 of the title input, type XY, and assert the value length stays 60 and selectionStart is 8.
• apps/web/e2e/tests/task/mobile-task-title-caret.spec.ts exists with the phone drawer flow (right-click task row in the Tasks dialog) covering the same rename + edit assertions.
• apps/web/hooks/use-task-title-selection-restore.test.tsx exists with a focused test that renders a controlled input through the (not yet existing) hook and asserts the caret is pinned after a truncating change.
• All three files FAIL on the current code for the expected reason: the caret lands at the end (60) instead of staying after the inserted text, and the hook module does not exist.

Verification

• cd apps/web && pnpm e2e:raw tests/kanban/task-title-caret.spec.ts — both tests fail with selectionStart 60, not 8.
• cd apps/web && pnpm e2e:raw --project=mobile-chrome tests/task/mobile-task-title-caret.spec.ts — both tests fail the same way.
• cd apps && pnpm --filter @kandev/web test -- --run apps/web/hooks/use-task-title-selection-restore.test.tsx — fails (module not found).

Files likely touched

• apps/web/e2e/tests/kanban/task-title-caret.spec.ts (new)
• apps/web/e2e/tests/task/mobile-task-title-caret.spec.ts (new)
• apps/web/hooks/use-task-title-selection-restore.test.tsx (new)

Dependencies

None.

Parallelism

Sequential. This is the RED wave for the whole fix.

Inputs

• The reproduction technique from plan.md ("Reproduction evidence"): seed a task with "T".repeat(60), open the dialog, click() the input, setSelectionRange(6, 6), testPage.keyboard.type("XY"), then read selectionStart and the value.
• Existing flows to model: tests/kanban/dialog-enter-confirms.spec.ts (kanban actions menu), tests/task/mobile-sidebar-task-actions.spec.ts (phone drawer rename/edit), pages/kanban-page.ts, pages/session-page.ts.
• The amended spec scenario: caret stays immediately after inserted text at the 60-character cap.

Output contract

Report the changed files, the exact failing assertions (observed caret values), and the task status in the same conversation. Do not implement the fix in this task. Do not delegate to a subagent without explicit user authorization.