Modularize Studio App.jsx into lib/components + add Vitest test suite#2
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App.jsx was a single 997-line file mixing data, analysis logic, CSV parsing, UI primitives, and five feature components. This splits it into focused modules and adds the Studio's first automated tests. Extraction (behavior-preserving, verbatim moves): - src/lib/lexicons.js word/emoji sets, TONE_DEFS/COLOR/PATTERNS, CAPTION_TONES - src/lib/analysis.js tokenize, countEmoji, analyzeSentiment, analyzeTone, enrich - src/lib/csv.js FIELD_MAP, pick, toNum, normalize, parseCSV - src/components/ primitives + UploadCard/Overview/Brands/Tweets/CaptionStudio - src/App.jsx thin shell (997 -> 174 lines) wiring tabs + selection state Tests (Vitest, jsdom-free Node env): - 40 tests across analysis/csv/lexicons; 100% line + 95.5% branch coverage of lib/ - npm test / test:watch / test:coverage scripts; standalone vitest.config.js so the build config is untouched Behavior is unchanged: production build is byte-stable (identical CSS hash), and a normalized source diff vs the original shows only formatter cosmetics (semicolons, trailing commas, arrow-param parens) plus the deliberate enrich/CAPTION_TONES moves. The unused lucide `Filter` import was dropped.
This was referenced Jun 13, 2026
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Summary
Splits the single 997-line
studio/src/App.jsxinto focused modules and adds the Studio's first automated test suite (Vitest).Extraction (behavior-preserving, verbatim moves)
src/lib/lexicons.js— word/emoji sets,TONE_DEFS/TONE_COLOR/TONE_PATTERNS,CAPTION_TONESsrc/lib/analysis.js—tokenize,countEmoji,analyzeSentiment,analyzeTone,enrichsrc/lib/csv.js—FIELD_MAP,pick,toNum,normalize,parseCSVsrc/components/— primitives +UploadCard/OverviewTab/BrandsTab/TweetsTab/CaptionStudiosrc/App.jsx— thin shell (997 → 174 lines) wiring tabs + selection stateTests
lib/npm test/test:watch/test:coverage; standalonevitest.config.jsso the Vite build config is untouchedBehavior preservation
enrich/CAPTION_TONESrelocationsFilterimportNo behavior changes — pure refactor + tests.