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familienarchiv/frontend/src/lib/shared/README.md
Marcel fee519b8a9
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docs(timeline): document /zeitstrahl, lib/timeline, monthBuckets move; RTM #779
Route tables (CLAUDE.md + frontend/CLAUDE.md), the document/timeline.ts ->
$lib/shared/utils/monthBuckets move (document + shared READMEs), GLOSSARY
Lebensweg entry, the c4 l3-frontend people-stories diagram, and the RTM rows
REQ-001..027 for feature zeitstrahl-global-view (#779), all marked Done.

Refs #779
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-13 20:00:00 +02:00

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Markdown

# shared (frontend)
Cross-domain utilities and UI primitives. Any file here is consumed by two or more domain folders and has no domain identity of its own.
## Admission criteria (what belongs here)
A file belongs in `shared/` if it meets **all three** conditions:
1. No domain identity — it does not represent a `Document`, `Person`, `Tag`, etc.
2. Consumed by ≥ 2 domain folders — or is framework infrastructure that every domain depends on.
3. Generic — could work in a different SvelteKit project with zero business-logic changes.
If any condition fails, the file belongs in the domain folder of its primary consumer.
## What this folder owns
| Sub-folder / file | Purpose |
| ----------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `api.server.ts` | Typed `openapi-fetch` client factory — the standard entry point for all backend API calls in server-side load functions and actions |
| `errors.ts` | Mirror of the backend `ErrorCode` enum + `getErrorMessage()` → Paraglide i18n key mapping |
| `types.ts` | Cross-domain TypeScript interfaces |
| `utils.ts` | Pure utility functions (date formatting, sorting, debounce) |
| `utils/monthBuckets.ts` | Pure month-bucket math (boundaries, sequences, gap-fill, year aggregation, axis ticks) shared by the `document/` density chart and the `timeline/` density strip — moved up from `document/timeline.ts` so `timeline/` need not import `document/` |
| `primitives/Sparkline.svelte` | Fixed-series bar sparkline (one bar per value) — used by the timeline density strip |
| `relativeTime.ts` | Human-relative time formatting (`"2 days ago"`) |
| `primitives/` | Generic UI components: `BackButton.svelte`, form inputs, pagination, layout shells |
| `discussion/` | Comment/mention editor shared by `document/` and `geschichte/` |
| `dashboard/` | Family Pulse widget and recent-activity components assembled in the `/` route |
| `hooks/` | Svelte 5 reactive hooks: `useTypeahead`, `useUnsavedWarning` |
| `services/` | Generic client-side service helpers |
| `actions/` | Shared SvelteKit form action utilities |
| `server/` | Server-only shared utilities (load function helpers) |
| `help/` | Coach marks and empty-state components used across multiple domains |
## What does NOT belong here
- Components owned by one domain — move to that domain's folder.
- Domain-specific business logic — even if shared, it belongs in the owning domain's public surface.
## Adding to shared/
If you need to add a file here, confirm it meets all three admission criteria. If it's domain-adjacent, check whether the owning domain should export it as part of its public surface instead.