docs(stammbaum): ADR-030 tidy-tree layout, supersede ADR-026 packer, refresh glossary (#724)

Review follow-up (Markus/Architect): ADR-026 pre-committed a successor ADR if the
in-house layout stopped converging; its UX stop-trigger (Albert smeared across the
canvas) fired. ADR-030 records the bottom-up tidy-tree, the module split, and the two
maintainer-confirmed decisions (hybrid intra-family, per-bloodline width metric),
superseding ADR-026's block-packer in part (no-dagre + seeded-rank retained). GLOSSARY
replaces the deleted sibling-block / parented / anchor-index vocabulary with the new
family-forest model (unit, tidy tree, structural owner, bloodline, cross-link).

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

docs/adr/026-stammbaum-layout-in-house.md

@@ -1,10 +1,14 @@
 # ADR-026 — In-House Stammbaum Layout, dagre Evaluated and Deferred
 
 **Date:** 2026-05-28
-**Status:** Accepted
+**Status:** Accepted — superseded in part by [ADR-030](./030-stammbaum-bloodline-tidy-tree-layout.md)
 **Issue:** #361
 **Supersedes:** _none_
-**Supersedes-on-trigger:** A future ADR-027 if any acceptance criterion below stops converging in-house.
+**Superseded-by:** ADR-030 (#724) replaces the **per-generation block packer** below with
+a bottom-up tidy-tree after its position-within-rank model stranded ancestors and smeared
+bloodlines across the canvas — the UX stop-trigger named in this ADR. The **in-house /
+no-dagre** decision and the seeded-rank invariant (#689) are retained.
+**Supersedes-on-trigger:** _(triggered)_ The UX stop-trigger fired; see ADR-030.
 
 ---
 
@@ -117,6 +121,7 @@ threshold, so `packBlocks.ts` is **not** yet warranted.
   is the source-of-truth probe against live data; the function is the
   capture-time and fixture-time signal that the predicate's count crossed
   zero.
+
 - **AC6 — Bundle-impact gate (≤ 40 kB gzipped on `/stammbaum`).** Moot under
   this ADR; reactivates only under ADR-027 (dagre adoption).
 - **AC7 — Visual regression at 320 / 768 / 1440.** `toHaveScreenshot()`