docs: add RD-36 — rename the stale ui/dashboard/ folder

RD-03 moved the dashboard page into the `overzicht` context and RD-04 left the
folder name alone, recording it as stale. It stays stale: the folder is named
after a page that lives somewhere else, so a reader looking for the dashboard
finds four sections that are not it.

Measured cost: 8 `git mv`s and four import lines in one file. Fold in two doc
paths that still name the moved page.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

docs/project/readable-codebase/PLAN.md

@@ -264,6 +264,21 @@ Also settle the two deviations the refactor left behind:
   an indirection and adds a barrel-shaped thing to a repo that deliberately has none.
 - Three of six sections have no story (`beheer-links`, `wat-moet-ik-regelen`,
   `wat-wilt-u-doen`). Add one only where the section has more than one visual state.
+- **The folder name — fix it (RD-36, added after RD-04 shipped).** RD-04 recorded
+  `registratie/ui/dashboard/` as a stale label and left it alone. It stays stale: the folder is
+  named after a page that now lives in `overzicht/`, so a reader looking for the dashboard finds
+  four sections that are not it, and the page is somewhere else. Measured cost: 8 `git mv`s and
+  **four import lines in one file** (`overzicht.page.ts`). The alias does not change.
+
+  Two names were considered. `overzicht-secties/` says what the four files are — registratie's
+  sections for the overzicht page — and keeps the Dutch that CLAUDE.md requires of a domain
+  context. Flattening the files into `registratie/ui/` was rejected: that directory holds one
+  folder per component, so eight loose files would break its shape.
+
+  Fold in two stale paths the same move left behind, both naming a file that no longer exists:
+  `docs/reference/feature-flags.md:55` and `.claude/skills/new-ssp/SKILL.md:65` still say
+  `registratie/ui/dashboard.page`. The flag logic they describe lives in
+  `overzicht/ui/wat-wilt-u-doen.section.ts` now.
 
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