---
phase: 03-interaction-quality-and-completeness
plan: 01
subsystem: frontend-interaction
tags: [inline-edit, spinner, ux, tdd, callbacks]
dependency_graph:
  requires: ["03-00"]
  provides: ["pencil-icon-affordance", "save-callbacks", "form-spinners"]
  affects: ["BillsTracker", "future-row-flash-feedback"]
tech_stack:
  added: []
  patterns: ["TDD red-green", "try/catch in async handler", "optional callback props"]
key_files:
  created: []
  modified:
    - frontend/src/components/InlineEditCell.tsx
    - frontend/src/components/InlineEditCell.test.tsx
    - frontend/src/pages/LoginPage.tsx
    - frontend/src/pages/RegisterPage.tsx
    - frontend/src/components/BudgetSetup.tsx
decisions:
  - "onSaveSuccess/onSaveError are optional callbacks — callers opt in to row-flash behavior in downstream plans"
  - "Pencil icon uses data-testid='pencil-icon' for reliable test targeting in jsdom"
  - "Budget Edit spinner deferred — no BudgetEdit form component exists in codebase yet"
metrics:
  duration: "2 minutes"
  completed: "2026-03-11T21:32:34Z"
  tasks_completed: 2
  files_modified: 5
---

# Phase 3 Plan 1: Inline Edit Affordance and Form Spinners Summary

**One-liner:** Pencil-icon hover affordance + onSaveSuccess/onSaveError callbacks in InlineEditCell, and Spinner in Login/Register/BudgetSetup submit buttons for loading feedback.

## What Was Built

### Task 1: Enhanced InlineEditCell (TDD)
- Added `Pencil` icon from `lucide-react` in display mode (opacity-0, group-hover:opacity-100 via CSS)
- Added `onSaveSuccess?: () => void` callback — fires after successful `onSave`
- Added `onSaveError?: () => void` callback — fires on `onSave` rejection; input value reverts to original
- Wrapped `onSave` call in try/catch inside `handleBlur`
- 4 new tests: pencil icon DOM presence, success callback, error callback + value revert, no-callback-when-value-unchanged

### Task 2: Form Spinners
- `LoginPage.tsx`: Button shows `<Spinner />` when `loading=true`, disabled, `min-w-[120px]`
- `RegisterPage.tsx`: Button shows `<Spinner />` when `loading=true`, disabled, `min-w-[120px]`
- `BudgetSetup.tsx`: Button shows `<Spinner />` when `saving=true`, disabled, `min-w-[120px]`
- Budget Edit spinner explicitly deferred — no BudgetEdit component exists yet

## Commits

| Task | Commit | Description |
|------|--------|-------------|
| Test RED | 58bb57b | test(03-01): add failing tests for pencil icon, onSaveSuccess, and onSaveError callbacks |
| Task 1 GREEN | d9e60fa | feat(03-01): enhance InlineEditCell with pencil icon hover affordance and save/error callbacks |
| Task 2 | 30ec2d5 | feat(03-01): add loading spinners to Login, Register, and BudgetSetup submit buttons |

## Verification

- All 9 InlineEditCell tests pass (including 4 new)
- All 43 tests pass across full suite (11 pre-existing skips)
- Production build: zero TypeScript errors

## Deviations from Plan

None — plan executed exactly as written.

## Self-Check: PASSED

All files found. All commits verified (58bb57b, d9e60fa, 30ec2d5). Build passes. 43 tests pass.