New `frontend/src/client/fristenrechner-result.ts` module renders the
shared result surface defined in
docs/design-fristenrechner-overhaul-2026-05-26.md §4:
* Sticky trigger card — event icon + name, proceeding/jurisdiction
chips, inline trigger-date input that re-fetches on change.
* Four follow-up groups — Mandatory / Recommended / Optional /
Conditional. SPAWNED rules fold into their priority bucket with
a `⇲ neues Verfahren` badge (§11.Q5). Conditional bucket holds
every rule with sr.condition_expr IS NOT NULL.
* Per-rule rows — title, duration phrase, party chip, legal-source
citation (with youpc.org link when available), pre-checked
checkbox driven by `defaultChecked(r)` (mandatory + recommended
on; conditional + court-set + optional off), inline ✏ Datum
override that re-renders.
* Write-back footer — conditional on `?project=<uuid>` per §11.Q7;
in kontextfrei mode the footer is hidden and an inline nudge
invites the user to pick an Akte. CTA submits to the existing
POST /api/projects/{id}/deadlines/bulk endpoint, stamping each
row with `audit_reason: "Aus Fristenrechner — Trigger: {name}
({date})"` per §11.Q12.
Mount + URL contract — when `?overhaul=1` is set in the URL,
`fristenrechner.ts` hides every legacy panel (`fristen-step1`,
`fristen-step2`, `fristen-pathway-a`, `fristen-pathway-b`,
`fristen-step3a`, the step-1 summary) and shows the overhaul root
instead. With `?overhaul=1&event=<code>&trigger_date=…` the surface
is deep-linkable end-to-end. Without `?event=` the empty-shell
nudge renders — S3+S4 will mount the entry-mode UIs onto this same
root.
Verified — bun build clean, 249 frontend tests pass (incl. 9 new
helper tests for groupFollowUps + defaultChecked), go build + vet
clean, S1 live-DB tests still green.