feat: add speaking practice with Web Speech API#19
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fasuizu-br wants to merge 2 commits intosilvioprog:mainfrom
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feat: add speaking practice with Web Speech API#19fasuizu-br wants to merge 2 commits intosilvioprog:mainfrom
fasuizu-br wants to merge 2 commits intosilvioprog:mainfrom
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added 2 commits
February 16, 2026 19:19
Allow users to download their study data as a JSON file and import it back, enabling backup and transfer between devices. Export serializes all studies with version metadata; import validates and replaces current data after user confirmation via dialog.
Add pronunciation training feature to the study flow. After viewing a transcript, users can click "Practice speaking" to record their speech via the browser's native Web Speech API. The spoken text is compared word-by-word using an LCS (Longest Common Subsequence) algorithm, producing a colored diff (green=correct, red=missing, orange=extra) with an accuracy score badge. - Zero cost: uses native browser API, no external services - Zero new runtime dependencies - Graceful degradation: hidden if browser lacks support - 121 tests (57 speechUtils + 21 hook + 17 component + 26 existing) - 100% coverage on speechUtils.ts
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Summary
Architecture
New files (7):
src/lib/speechUtils.ts— Pure text comparison (normalizeText, LCS algorithm, buildDiff, compareTexts)src/hooks/useSpeechRecognition.ts— React hook wrapping Web Speech API with full state machinesrc/components/Study/SpeakingPractice.tsx— UI component (idle → listening → processing → done/error)src/lib/speechUtils.test.ts— 57 tests (normalization, LCS, diff, edge cases, stress tests)src/hooks/useSpeechRecognition.test.ts— 21 tests (state transitions, errors, cleanup, memory leaks)src/components/Study/SpeakingPractice.test.tsx— 17 tests (UI states, colors, interactions)src/test-setup.ts— jest-dom matchers setupModified files (5):
src/components/Study/Transcript.tsx— Integration pointsrc/vite-env.d.ts— Web Speech API TypeScript declarationsvitest.config.ts— jsdom environment + coverage configpackage.json/package-lock.json— Dev dependencies (@testing-library/react, jest-dom, jsdom, user-event)Test plan