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web-app-launcher/plans/phase-3-advanced-features/phase-2-sparklines.md
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alexei.dolgolyov c6a7de895d feat(phase3): import/export, sparklines, user theme overrides
- JSON import/export with conflict resolution (skip/overwrite) + admin UI
- Ping history sparklines on AppWidget and AppCard (24h, 288 points)
- Hourly cleanup job for old AppStatus records
- User theme preferences (hue, saturation, mode, background, locale)
- Settings page with ThemeCustomizer (sliders, toggles, live preview)
- Prisma migration for user preference fields
- i18n translations for all new strings (EN/RU)
2026-03-25 00:51:01 +03:00

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# Phase 2: Ping History Sparklines
**Status:** ✅ Complete
**Parent plan:** [PLAN.md](./PLAN.md)
**Domain:** fullstack
## Tasks
- [x] Task 1: Create `src/routes/api/apps/[id]/history/+server.ts` — GET last 24h of healthcheck results
- [x] Task 2: Create `src/lib/components/app/SparklineChart.svelte` — tiny inline SVG sparkline (green=up, red=down)
- [x] Task 3: Update `src/lib/components/widget/AppWidget.svelte` — show sparkline below status badge
- [x] Task 4: Update `src/lib/components/app/AppCard.svelte` — show sparkline on app cards
- [x] Task 5: Calculate and display uptime percentage (last 24h)
- [x] Task 6: Update healthcheck service to retain last 288 records per app (24h at 5min intervals)
- [x] Task 7: Add cleanup job to prune old AppStatus records beyond retention period
- [x] Task 8: Add i18n translations (EN/RU)
## Handoff to Next Phase
All sparkline features implemented. History API returns last 288 records with uptime percentage. SparklineChart renders color-coded bars (green/red/yellow/gray). Cleanup job prunes records older than 24h hourly. Both AppWidget and AppCard fetch and display sparklines with uptime percentage on mount.