Sprint 3 Report

Task Detail Screen — Feb 18, 2026 • Branch: fix/ui-review-findings

Tasks Completed

Layouts Built

726

Frontend Tests

Test Files

Sprint Overview

Goal: Build the task detail screen with 3 switchable layouts (Property-First, Content-First, Hierarchical), sheet/panel presentation, date and priority pickers, completion flow, description editor, subtask CRUD, and layout switching.

Outcome: All 13 tasks completed. Full-stack implementation of task detail with 3 layouts, responsive presentation, and comprehensive test suite.

Deliverables Checklist

Deliverable	Status	Task
Layout A: Property-First	✔ Done	#3
Layout B: Content-First	✔ Done	#6
Layout C: Hierarchical	✔ Done	#8
Sheet/Panel presentation	✔ Done	#2
Due date picker	✔ Done	#4
Priority picker	✔ Done	#4
Completion flow (confetti + undo)	✔ Done	#5
Subtask CRUD (frontend + backend)	✔ Done	#1, #8
Description editor with auto-save	✔ Done	#7
Layout switcher in settings	✔ Done	#9
Routing: list → detail	✔ Done	#11
Empty states + error handling	✔ Done	#10
Tests for layouts, pickers, sheet	✔ Done	#12

Component Inventory

New Components (Sprint 3)

Component	File	Description
TaskDetailSheet	`v2/TaskDetailSheet.tsx`	Responsive bottom sheet (mobile) / side panel (desktop) with drag-to-dismiss
TaskDetailLayoutA	`v2/TaskDetailLayoutA.tsx`	Property-First layout: title, property chips, children, notes
TaskDetailLayoutB	`v2/TaskDetailLayoutB.tsx`	Content-First layout: prominent notes, property pills, checklist
TaskDetailLayoutC	`v2/TaskDetailLayoutC.tsx`	Hierarchical layout: subtask-centric with inline CRUD
TaskDetailV2	`v2/TaskDetailV2.tsx`	Wrapper wiring sheet + layout + context + API
DatePickerSheet	`v2/DatePickerSheet.tsx`	Due date picker with Today/Tomorrow/Next Week shortcuts
PriorityPickerSheet	`v2/PriorityPickerSheet.tsx`	P1-P4 priority selector with color dots
DescriptionEditor	`v2/DescriptionEditor.tsx`	Notes editor with auto-save, collapsed/expanded modes
PropertiesSheet	`v2/PropertiesSheet.tsx`	Full properties slide-up sheet for Layout B
LayoutPicker	`v2/LayoutPicker.tsx`	Layout switcher (A/B/C) in settings, localStorage persist
UndoToast	`v2/UndoToast.tsx`	Completion undo toast with countdown
Confetti	`v2/Confetti.tsx`	Celebration animation on task completion
CompletionConfirmDialog	`v2/CompletionConfirmDialog.tsx`	Cascade completion confirm dialog
DetailEmptyStates	`v2/DetailEmptyStates.tsx`	Empty state placeholders for no description / no subtasks
SubtaskQuickAdd	`v2/SubtaskQuickAdd.tsx`	Inline subtask creation input

Modified Files

File	Change
`frontend/src/app.tsx`	Replaced v1 TaskDetail with TaskDetailV2
`frontend/src/context/TaskContext.tsx`	Added detailLayout state + setDetailLayout
`frontend/src/services/api.ts`	Added subtask CRUD endpoints
`backend/src/routes/tasks.ts`	Added subtask API routes
`backend/src/notion/client.ts`	Added Notion to_do block operations
`frontend/src/styles/task-detail.css`	New CSS for sheet/panel/backdrop/animations

Test Coverage

Test File	Tests	Status
`TaskDetailSheet.test.tsx`	15	PASS
`TaskDetailV2.test.tsx`	12	PASS
`TaskDetailLayoutA.test.tsx`	39	PASS
`TaskDetailLayoutB.test.tsx`	34	PASS
`TaskDetailLayoutC.test.tsx`	32	PASS
`LayoutPicker.test.tsx`	12	PASS
`PropertiesSheet.test.tsx`	19	PASS
`DescriptionEditor.test.tsx`	17	PASS
`CompletionConfirmDialog.test.tsx`	21	PASS
`UndoToast.test.tsx`	18	PASS
`Confetti.test.tsx`	10	PASS
`DatePickerSheet.test.tsx`	15	PASS
`PriorityPickerSheet.test.tsx`	20	PASS
`DetailEmptyStates.test.tsx`	30	PASS
`SubtaskQuickAdd.test.tsx`	20	PASS
`SaveErrorFeedback.test.tsx`	14	PASS
Backend API tests	176	PASS

All test failures resolved. PriorityPickerSheet timer tests fixed (waitFor instead of fake timers). TaskDetailLayoutA tests fixed (DescriptionEditor mock, notesSlot wiring, toolbar handlers).

726

Frontend Tests Passing

176

Backend Tests Passing

Failures

Build Status

Frontend `npm run build`	PASS	275 modules, 170KB gzip
Frontend `tsc --noEmit`	PASS	No type errors
Backend `npm run build`	PASS	TypeScript compilation clean
Backend `npm test`	PASS	176/176 tests passing

Architecture Highlights

Responsive presentation: TaskDetailSheet uses matchMedia('min-width: 768px') to switch between mobile bottom sheet and desktop side panel. Mobile sheet has drag-to-dismiss via useSwipeToDismiss hook.
Layout switching: TaskDetailV2 reads detailLayout from TaskContext and conditionally renders Layout A, B, or C. Preference persisted to localStorage via LayoutPicker in Settings.
Optimistic updates: All task mutations (status, title, notes, priority, due date) are applied optimistically in the UI, then synced to Notion API. Failures revert with toast feedback.
History management: Detail sheet pushes browser history state so Android back button dismisses the sheet.
Reduce motion: All animations respect prefers-reduced-motion media query via useReduceMotion hook.

Known Issues / Tech Debt

Layout C subtask reorder: Drag-to-reorder for subtasks is not yet implemented (deferred to Sprint 4).
Shared element transitions: List → detail shared element animations (per interactions.md §3) deferred to Sprint 4.
Category picker: No dedicated category picker sheet yet; categories are set via PropertiesSheet only.

Task Breakdown

#	Task	Owner	Status
1	Backend: Subtask CRUD endpoints + task detail enrichment	backend-dev	✔
2	Sheet/Panel presentation system	frontend-dev	✔
3	Layout A: Property-First task detail	qa-engineer	✔
4	Due date picker + Priority picker	ux-researcher	✔
5	Completion flow: checkbox animation + undo toast + confetti	ui-designer	✔
6	Layout B: Content-First task detail	ux-researcher	✔
7	Description editor with auto-save	product-owner	✔
8	Layout C: Hierarchical task detail + subtask CRUD	devops-engineer	✔
9	Layout switcher in settings + localStorage	product-owner	✔
10	Empty states + error handling	business-analyst	✔
11	Wire routing: list tap → detail view	backend-dev	✔
12	Tests for layouts, pickers, sheet	frontend-dev	✔
13	Build verification + sprint report	frontend-dev	✔

Sprint 3 Report • Generated Feb 18, 2026 • Notion Tasks PWA v2