fix(sentiment): hide sources with no comments

[rebelchris]

Summary

• Hide per-community sentiment rows when the matched source discussion has zero comments
• Keep the rest of the sentiment breakdown visible when only one source has no comments
• Update regression coverage for the zero-comment source case

Testing

• NODE_ENV=test node_modules/.bin/jest src/components/post/focus/CommunitySentimentBreakdown.spec.tsx --runInBand
• node ./scripts/typecheck-strict-changed.js
• node_modules/.bin/prettier --check src/components/post/focus/CommunitySentimentBreakdown.tsx src/components/post/focus/CommunitySentimentBreakdown.spec.tsx
• git diff --check
• NODE_ENV=test node_modules/.bin/jest --runInBand (webapp)

Preview domain

https://codex-hide-empty-sentiment-sourc.preview.app.daily.dev

[vercel]

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Project	Deployment	Actions	Updated (UTC)
daily-webapp	Ready	Preview	Jul 23, 2026 3:01pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
storybook	Ignored		Jul 23, 2026 3:01pm