---
phase: quick
plan: 260329-ten
subsystem: ui/screens
tags: [discover-phase, space-bar, ux, level-1]
dependency_graph:
  requires: []
  provides: [space-bar-discover-step]
  affects: [runDiscoverPhase, level-1-lesson-flow]
tech_stack:
  added: []
  patterns: [DOM manipulation, keyboard event listener, CSS class toggle]
key_files:
  modified:
    - src/ui/screens.ts
decisions:
  - Space bar discover step uses hardcoded German text (not getLetterIntro) to guarantee ␣ symbol mention
  - Space key discover step follows identical UX pattern as letter discover steps for consistency
metrics:
  duration: "2min"
  completed: "2026-03-29"
  tasks: 1
  files_modified: 1
---

# Quick Task 260329-ten: Leertaste Symbol in Entdecken-Phase Summary

**One-liner:** Added dedicated space bar discover step showing ␣ symbol with "Leertaste" label and child-friendly explanation before practice begins.

## What Was Done

The `runDiscoverPhase()` function in `src/ui/screens.ts` previously skipped the space key entirely with `if (key === " ") continue`. This meant children encountered the ␣ symbol during practice without any introduction.

The fix replaces the skip with a full discover step for the space bar:

1. Companion text explains the ␣ symbol in child-friendly German: "Siehst du die grosse Taste ganz unten? Das ist die Leertaste! Wenn du dieses Zeichen siehst: ␣ — dann drueckst du mit dem Daumen die Leertaste. Probier es aus!"
2. The ␣ symbol (U+2423) is displayed large using the `falling-letter` class, with a "Leertaste" label underneath.
3. The space key on the keyboard is highlighted and pulses with `keyboard__key--discover-pulse`.
4. Child must press the space bar once to confirm understanding and advance.

## Deviations from Plan

None — plan executed exactly as written.

## Commits

| Task | Name | Commit | Files |
|------|------|--------|-------|
| 1 | Add space bar discover step in runDiscoverPhase | 869b1e3 | src/ui/screens.ts |

## Verification

- All 85 existing tests pass (7 test files).
- No regressions introduced.

## Self-Check: PASSED
