---
phase: 01-input-ux
plan: "01"
subsystem: ui
tags: [react, stepper, input, components, css]

# Dependency graph
requires: []
provides:
  - "StepperInput controlled component with +/- buttons, min/max clamping, aria support"
  - "WeightInput wrapper (2.5kg steps, kg suffix)"
  - "RepsInput wrapper (1 rep steps)"
  - "Stepper CSS block in App.css (.stepper-wrapper, .stepper-btn, .stepper-input)"
affects: [01-02, workout-page, set-logging]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Controlled stepper component: all state in parent, component is pure"
    - "Wrapper component pattern: WeightInput/RepsInput configure StepperInput with domain defaults"

key-files:
  created:
    - frontend/src/components/StepperInput.jsx
    - frontend/src/components/WeightInput.jsx
    - frontend/src/components/RepsInput.jsx
  modified:
    - frontend/src/App.css

key-decisions:
  - "StepperInput is a pure controlled component - no internal useState, all state lives in parent"
  - "44px minimum touch targets on stepper buttons for mobile usability"
  - "font-size 16px on input to prevent iOS auto-zoom"
  - "Decimal step (2.5) uses inputMode=decimal; integer step uses inputMode=numeric"

patterns-established:
  - "Stepper wrapper pattern: domain-specific inputs (WeightInput, RepsInput) wrap generic StepperInput"
  - "Negative input rejected via min clamping, not by blocking input events"

# Metrics
duration: 1min
completed: 2026-02-16
---

# Phase 1 Plan 01: Stepper Input Components Summary

**StepperInput controlled component with +/- 44px touch buttons, WeightInput (2.5kg steps) and RepsInput (1 rep steps) wrappers, and stepper CSS block added to App.css**

## Performance

- **Duration:** ~1 min
- **Started:** 2026-02-16T07:02:46Z
- **Completed:** 2026-02-16T07:04:13Z
- **Tasks:** 2
- **Files modified:** 4

## Accomplishments
- StepperInput: fully controlled component with +/- buttons, min/max clamping, 44px touch targets, 16px font, aria-labels, decimal/numeric inputMode
- WeightInput: wrapper with step=2.5, suffix="kg", delegates all behavior to StepperInput
- RepsInput: wrapper with step=1, no suffix, delegates all behavior to StepperInput
- App.css: stepper styles appended cleanly at end of file, no existing CSS removed

## Task Commits

Each task was committed atomically:

1. **Task 1: Create StepperInput.jsx** - `912bd5d` (feat)
2. **Task 2: WeightInput, RepsInput, stepper CSS** - `9fb8543` (feat)

**Plan metadata:** see final commit below

## Files Created/Modified
- `frontend/src/components/StepperInput.jsx` - Reusable controlled stepper with +/- buttons, clamping, aria
- `frontend/src/components/WeightInput.jsx` - Weight-specific wrapper (step=2.5, suffix=kg)
- `frontend/src/components/RepsInput.jsx` - Reps-specific wrapper (step=1, no suffix)
- `frontend/src/App.css` - Stepper styles appended (.stepper-wrapper through mobile @media block)

## Decisions Made
- StepperInput is a pure controlled component with no internal useState — keeps state management in parent, consistent with React best practices and plan specification
- handleInputChange clamps to min (rejects negatives) rather than blocking keystrokes, so users can see feedback
- inputMode switches between "numeric" and "decimal" based on whether step has fractional part

## Deviations from Plan

None - plan executed exactly as written. The build linter added `min-height: 44px` to `.start-btn` (a pre-existing class in App.css), which is a positive accessibility side effect and not a deviation from this plan's scope.

## Issues Encountered
The Edit tool hit a "file modified since read" error twice on App.css because the linter was modifying the file after each read. Resolved by using bash `cat >>` to append the CSS block directly, bypassing the read-then-edit cycle.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness
- StepperInput, WeightInput, and RepsInput are complete and ready for Plan 02 to integrate into WorkoutPage
- Components are fully self-contained; Plan 02 only needs to import and drop them into the set rows
- Build passes with no new errors or warnings

---
*Phase: 01-input-ux*
*Completed: 2026-02-16*

## Self-Check: PASSED

- FOUND: frontend/src/components/StepperInput.jsx
- FOUND: frontend/src/components/WeightInput.jsx
- FOUND: frontend/src/components/RepsInput.jsx
- FOUND: .planning/phases/01-input-ux/01-01-SUMMARY.md
- FOUND: 912bd5d (Task 1 commit)
- FOUND: 9fb8543 (Task 2 commit)
