feat(chronik): add ADR-003 + Paraglide keys for /chronik page (de/en/es)
- docs/adr/003-chronik-unified-activity-feed.md: records the session-rollup
decision (LAG + 120-min gap), the dedupe deletion, the single-endpoint
composition, and the German-URL convention.
- frontend/messages/{de,en,es}.json: adds chronik_* keys for page title,
Für-dich box, filter pills, day headers, singleton/rollup verb variants
per kind, empty states, error card, Mehr-laden pagination, and the Bell
footer link retarget.
No pluralization via ICU match — separate singleton/rollup keys per verb,
per the Felix discussion (comment #3573).
Part of #285.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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docs/adr/003-chronik-unified-activity-feed.md
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docs/adr/003-chronik-unified-activity-feed.md
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# ADR-003: Session-Rollup Unified Activity Feed on `/chronik`
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## Status
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Accepted
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## Context
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The app had two disconnected ways to see what was happening in the archive:
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1. `/notifications` — personal mentions/replies only, delivered via the `notifications` table and a Bell dropdown.
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2. Dashboard activity feed — ambient events (uploads, transcription, annotations, comments, mentions) via `/api/dashboard/activity`, which deduplicated using `DISTINCT ON (actor_id, document_id, kind, date_trunc('hour', happened_at))`.
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Two separate lists was a poor mental model (personal vs. ambient feel the same to the user), the `/notifications` page wasted horizontal space, the dashboard's "Alle anzeigen" pointed to `/documents` (dead-end), and the hour-trunc dedupe produced ugly splits on natural sessions — saving 20 transcription blocks at 08:58, 08:59, 09:01 yielded two rows.
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We needed one page that merges both streams, keeps personal mentions visually loud, and aggregates ambient noise coherently.
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## Decision
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**One page `/chronik` backed by two endpoints.** The SvelteKit `+page.server.ts` composes data from `/api/dashboard/activity` (for the ambient timeline) and `/api/notifications` (for the "Für dich" box). No new `/api/chronik` orchestrator — the frontend load function is the composition seam.
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**Session-style rollup replaces hour-trunc dedupe everywhere.** `AuditLogQueryRepository.findDedupedActivityFeed` is renamed to `findRolledUpActivityFeed` and rewritten using a `LAG()`-based session algorithm:
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```
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LAG(happened_at) OVER (PARTITION BY actor_id, document_id, kind ORDER BY happened_at)
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→ is_new_session = gap > 7200s (or first event in partition, or kind ∈ {COMMENT_ADDED, MENTION_CREATED})
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→ SUM(is_new_session) OVER (... ROWS UNBOUNDED PRECEDING) = session_id
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→ GROUP BY (actor_id, document_id, kind, session_id) → MIN(happened_at), MAX(...), COUNT(*)
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```
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Events within 120 min on the same `(actor, document, kind)` become one row with `count` and `happenedAtUntil` fields. `COMMENT_ADDED` and `MENTION_CREATED` always start a new session — these kinds never roll up. No hard cap on total session span (a 4-hour transcription sitting is one row). The hour-trunc dedupe SQL is **deleted**, not kept alongside — one aggregation strategy per query.
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**URL is universal German `/chronik` across all locales**, matching the existing convention (`/dokumente`, `/personen`, `/briefwechsel`). Content is translated via Paraglide; the URL is a stable German identifier, not a translatable route.
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**DTO extended, not replaced.** `ActivityFeedItemDTO` gains `count: int` (required, `1` for singletons) and `happenedAtUntil: OffsetDateTime?` (null for singletons, end-of-session for rollups). One DTO shape serves both the Chronik timeline and the dashboard side-rail.
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**`/notifications` route is deleted outright.** The app is pre-production — no 301 redirect, no zombie page.
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## Alternatives Considered
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| Alternative | Why rejected |
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|---|---|
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| Fixed 2-hour wall-clock buckets (`date_trunc('hour', happened_at / 2)`) | Splits natural sessions at bucket boundaries (e.g. events at 13:58 / 13:59 / 14:01 land in two rollup rows) |
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| Keep `DISTINCT ON hour-trunc` alongside new rollup query | Two aggregation strategies = zombie logic; dashboard and Chronik would drift |
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| New `/api/chronik` endpoint that merges both streams | Couples two domains (notifications + audit) at the API layer; composition belongs in `+page.server.ts` |
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| Localized URL slugs (`/chronik` / `/chronicle` / `/crónica`) | Breaks the project's existing German-URL convention and adds Paraglide routing overhead for zero UX value |
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| Per-locale rollup in the SQL (e.g. align to local-day boundaries) | Timezone-aware SQL is brittle; rollup is a time-gap concept, not a calendar-day concept |
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## Consequences
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**Easier:**
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- One hot path — `/api/dashboard/activity` is backed by a single partial covering index (`V49__add_audit_log_rollup_index.sql`) that matches the rollup query's WHERE clause exactly.
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- Dashboard side-rail gets rollup for free — 20 block-saves appear as one "Papa transkribierte 20 Blöcke" row with a time range, not 20 dedup'd hour buckets.
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- Component reuse — `ChronikRow.svelte` renders both singleton and rollup variants via a `$derived` discriminator; `DashboardActivityFeed.svelte` consumes the same DTO shape.
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**Harder:**
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- The session SQL is ~15 lines longer than `DISTINCT ON`. That's the price for not splitting natural sessions at fixed boundaries — worth it on day one.
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- Historical `/api/dashboard/activity` consumers now see `count` and `happenedAtUntil`. No breaking change — `count` defaults to `1`, `happenedAtUntil` is nullable — but pre-existing tests needed updating.
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- Rollup is load-bearing for the UX — if the index is missing or the query regresses, the page either runs slow or returns duplicate rows. Covered by the rolledUp integration tests and the partial covering index; worth a follow-up Grafana panel on `/api/dashboard/activity` p95 latency.
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@@ -751,5 +751,44 @@
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"audit_action_comment_added": "hat kommentiert:",
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"audit_action_mention_created": "hat dich erwähnt in",
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"dropzone_release": "Loslassen zum Hochladen"
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"dropzone_release": "Loslassen zum Hochladen",
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"chronik_page_title": "Chronik",
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"chronik_for_you_caption": "Für dich",
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"chronik_for_you_count": "{count} neu",
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"chronik_mark_read_aria": "Als gelesen markieren",
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"chronik_mark_all_read": "Alle gelesen",
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"chronik_inbox_zero_title": "Keine neuen Erwähnungen",
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"chronik_inbox_zero_link": "Ältere Erwähnungen ansehen →",
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"chronik_filter_label": "Aktivitäten filtern",
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"chronik_filter_all": "Alle",
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"chronik_filter_for_you": "Für dich",
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"chronik_filter_uploaded": "Hochgeladen",
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"chronik_filter_transcription": "Transkription",
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"chronik_filter_comments": "Kommentare",
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"chronik_day_today": "Heute",
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"chronik_day_yesterday": "Gestern",
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"chronik_day_this_week": "Diese Woche",
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"chronik_day_older": "Älter",
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"chronik_singleton_text_saved": "{actor} transkribierte einen Block in {doc}",
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"chronik_rollup_text_saved": "{actor} transkribierte {count} Blöcke in {doc}",
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"chronik_singleton_uploaded": "{actor} lud {doc} hoch",
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"chronik_rollup_uploaded": "{actor} lud {count} Dokumente hoch",
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"chronik_singleton_reviewed": "{actor} überprüfte einen Block in {doc}",
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"chronik_rollup_reviewed": "{actor} überprüfte {count} Blöcke in {doc}",
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"chronik_singleton_annotated": "{actor} annotierte {doc}",
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"chronik_rollup_annotated": "{actor} annotierte {doc} {count}×",
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"chronik_comment_added": "{actor} kommentierte {doc}",
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"chronik_mention_created": "{actor} erwähnte dich in {doc}",
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"chronik_reply_received": "{actor} antwortete dir in {doc}",
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"chronik_empty_first_run_title": "Noch nichts geschehen",
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"chronik_empty_first_run_body": "Sobald jemand aus der Familie Dokumente hochlädt oder transkribiert, erscheint hier die Aktivität.",
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"chronik_empty_filter_title": "Nichts in dieser Ansicht",
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"chronik_empty_filter_body": "In diesem Filter gibt es keine Einträge.",
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"chronik_error_title": "Die Chronik konnte nicht geladen werden.",
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"chronik_error_retry": "Erneut versuchen",
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"chronik_load_more": "Mehr laden",
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"chronik_loading": "Lädt …",
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"chronik_load_more_announcement": "{count} weitere Einträge geladen",
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"chronik_view_all": "Zur Chronik →"
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}
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"audit_action_comment_added": "commented:",
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"audit_action_mention_created": "mentioned you in",
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"dropzone_release": "Release to upload"
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"dropzone_release": "Release to upload",
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"chronik_page_title": "Chronicle",
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"chronik_for_you_caption": "For you",
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"chronik_for_you_count": "{count} new",
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"chronik_mark_read_aria": "Mark as read",
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"chronik_mark_all_read": "Mark all read",
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"chronik_inbox_zero_title": "No new mentions",
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"chronik_inbox_zero_link": "See older mentions →",
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"chronik_filter_label": "Filter activity",
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"chronik_filter_all": "All",
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"chronik_filter_for_you": "For you",
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"chronik_filter_uploaded": "Uploaded",
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"chronik_filter_transcription": "Transcription",
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"chronik_filter_comments": "Comments",
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"chronik_day_today": "Today",
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"chronik_day_yesterday": "Yesterday",
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"chronik_day_this_week": "This week",
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"chronik_day_older": "Older",
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"chronik_singleton_text_saved": "{actor} transcribed a block in {doc}",
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"chronik_rollup_text_saved": "{actor} transcribed {count} blocks in {doc}",
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"chronik_singleton_uploaded": "{actor} uploaded {doc}",
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"chronik_rollup_uploaded": "{actor} uploaded {count} documents",
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"chronik_singleton_reviewed": "{actor} reviewed a block in {doc}",
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"chronik_rollup_reviewed": "{actor} reviewed {count} blocks in {doc}",
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"chronik_singleton_annotated": "{actor} annotated {doc}",
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"chronik_rollup_annotated": "{actor} annotated {doc} {count}×",
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"chronik_comment_added": "{actor} commented on {doc}",
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"chronik_mention_created": "{actor} mentioned you in {doc}",
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"chronik_reply_received": "{actor} replied to you in {doc}",
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"chronik_empty_first_run_title": "Nothing has happened yet",
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"chronik_empty_first_run_body": "As soon as someone in the family uploads or transcribes a document, the activity will show up here.",
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"chronik_empty_filter_title": "Nothing in this view",
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"chronik_empty_filter_body": "There are no entries for this filter.",
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"chronik_error_title": "The chronicle could not be loaded.",
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"chronik_error_retry": "Try again",
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"chronik_load_more": "Load more",
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"chronik_loading": "Loading …",
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"chronik_load_more_announcement": "{count} more entries loaded",
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"chronik_view_all": "Open chronicle →"
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}
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"audit_action_comment_added": "comentó:",
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"audit_action_mention_created": "te mencionó en",
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"dropzone_release": "Suelta para subir"
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"dropzone_release": "Suelta para subir",
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"chronik_page_title": "Crónica",
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"chronik_for_you_caption": "Para ti",
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"chronik_for_you_count": "{count} nuevas",
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"chronik_mark_read_aria": "Marcar como leído",
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"chronik_mark_all_read": "Marcar todas leídas",
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"chronik_inbox_zero_title": "Sin nuevas menciones",
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"chronik_inbox_zero_link": "Ver menciones anteriores →",
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"chronik_filter_label": "Filtrar actividad",
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"chronik_filter_all": "Todas",
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"chronik_filter_for_you": "Para ti",
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"chronik_filter_uploaded": "Subidos",
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"chronik_filter_transcription": "Transcripción",
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"chronik_filter_comments": "Comentarios",
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"chronik_day_today": "Hoy",
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"chronik_day_yesterday": "Ayer",
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"chronik_day_this_week": "Esta semana",
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"chronik_day_older": "Anterior",
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"chronik_singleton_text_saved": "{actor} transcribió un bloque en {doc}",
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"chronik_rollup_text_saved": "{actor} transcribió {count} bloques en {doc}",
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"chronik_singleton_uploaded": "{actor} subió {doc}",
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"chronik_rollup_uploaded": "{actor} subió {count} documentos",
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"chronik_singleton_reviewed": "{actor} revisó un bloque en {doc}",
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"chronik_rollup_reviewed": "{actor} revisó {count} bloques en {doc}",
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"chronik_singleton_annotated": "{actor} anotó {doc}",
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"chronik_rollup_annotated": "{actor} anotó {doc} {count}×",
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"chronik_comment_added": "{actor} comentó en {doc}",
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"chronik_mention_created": "{actor} te mencionó en {doc}",
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"chronik_reply_received": "{actor} te respondió en {doc}",
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"chronik_empty_first_run_title": "Aún no ha pasado nada",
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"chronik_empty_first_run_body": "En cuanto alguien de la familia suba o transcriba un documento, la actividad aparecerá aquí.",
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"chronik_empty_filter_title": "Nada en esta vista",
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"chronik_empty_filter_body": "No hay entradas para este filtro.",
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"chronik_error_title": "No se pudo cargar la crónica.",
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"chronik_error_retry": "Reintentar",
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"chronik_load_more": "Cargar más",
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"chronik_loading": "Cargando …",
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"chronik_load_more_announcement": "{count} entradas más cargadas",
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"chronik_view_all": "Abrir crónica →"
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}
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