docs(timeline): document curator event routes (CLAUDE.md, C4, rtm)

Adds the events/new + events/[id]/edit children to both CLAUDE.md route tables
and the frontend C4 people-stories diagram (new zeitstrahlEvents component +
backend relation), and traces REQ-001..017 (feature timeline-curator-forms) in
.specify/rtm.md mirroring the sibling #776/#777/#778/#779 timeline rows.

Refs #781
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/architecture/c4/l3-frontend-3c-people-stories.puml

@@ -15,6 +15,7 @@ System_Boundary(frontend, "Web Frontend (SvelteKit / SSR)") {
     Component(geschichtenEdit, "/geschichten/[id]/edit and /geschichten/new", "SvelteKit Routes", "Story editor and creation flow. New: TypeSelector (STORY/JOURNEY radio group with roving tabindex) → StoryCreate (TipTap rich text, person linking, POST /api/geschichten) or JourneyCreate (title + first item). Edit: branches on GeschichteType — STORY opens GeschichteEditor (TipTap body + GeschichteSidebar incl. StoryDocumentPanel: document linking via POST/DELETE /items); JOURNEY opens JourneyEditor (title, intro textarea, ordered JourneyItemRow list with drag-reorder + move-up/down, JourneyAddBar for document/interlude addition, GeschichteSidebar). JourneyEditor mutations: POST/DELETE /items, PUT /items/reorder, PATCH /items/{id}. Requires BLOG_WRITE permission.")
     Component(stammbaum, "/stammbaum", "SvelteKit Route", "Family tree visualisation. Loader: GET /api/network (nodes + edges). Renders interactive family tree from network graph data.")
     Component(zeitstrahl, "/zeitstrahl", "SvelteKit Route", "Global timeline (Zeitstrahl). SSR loader: GET /api/timeline -> TimelineDTO. Renders lib/timeline/TimelineView (Datum mode): year bands (YearBand) with EventPill / WorldBand / LetterCard, dense-year YearLetterStrip (shared Sparkline + monthHistogram), folded GapSpan for empty-year runs, and an undated bucket. personId prop is the per-person Lebensweg seam (issue #10), undefined here.")
+    Component(zeitstrahlEvents, "/zeitstrahl/events/new and /zeitstrahl/events/[id]/edit", "SvelteKit Routes", "Curator event editor (WRITE_ALL-gated via server load, 403 error page). One lib/timeline/EventForm for both routes: title, EventTypeSelect (PERSONAL/HISTORICAL segmented radio), shared DatePrecisionField (RANGE reveals end date), plain-text description, PersonMultiSelect + DocumentMultiSelect. New: ?personId/?documentId prefill via Promise.all (404/403 swallowed), POST /api/timeline/events. Edit: load seeds from GET /api/timeline/events/{id} (404 on any non-ok — fails closed against derived events), PUT (optimistic-lock version) + DELETE behind ConfirmDialog. Context-aware redirect via UUID-validated originPersonId.")
     Component(themen, "/themen", "SvelteKit Route", "Browsable topic index. Shows all root tags as cards with color bars and child rows. ThemenWidget also embedded in the home dashboard (reader + editor sidebar). Loader: GET /api/tags/tree.")
     Component(profilePage, "/profile", "SvelteKit Route", "Current user profile settings. Loader: GET /api/users/me/notification-preferences. Actions: update name/password and notification preferences.")
     Component(userProfile, "/users/[id]", "SvelteKit Route", "Public user profile view. Loader: GET /api/users/{id}.")
@@ -30,6 +31,7 @@ Rel(geschichtenEdit, backend, "GET /api/persons/{id} (pre-populate), POST /api/g
 Rel(stammbaum, backend, "GET /api/network", "HTTP / JSON")
 Rel(user, zeitstrahl, "Reads the family timeline", "HTTPS / Browser")
 Rel(zeitstrahl, backend, "GET /api/timeline -> TimelineDTO", "HTTP / JSON")
+Rel(zeitstrahlEvents, backend, "GET /api/timeline/events/{id}, POST /api/timeline/events, PUT/DELETE /api/timeline/events/{id}, GET /api/persons/{id} + /api/documents/{id} (prefill)", "HTTP / JSON")
 Rel(themen, backend, "GET /api/tags/tree", "HTTP / JSON")
 Rel(profilePage, backend, "GET/PUT /api/users/me, notification-preferences", "HTTP / JSON")
 Rel(userProfile, backend, "GET /api/users/{id}", "HTTP / JSON")