docs(plan-3): close out Plan 3 — BACKLOG entries, RFC status, primitives registry, tooling conventions

- BACKLOG: add 3 spawned follow-ups (EnergyDots NaN, DraggableBlock pointercancel, AD-3 Menubar a11y)
- RFC-WS-GUI-REDESIGN-CREWLI-STARTER: mark Plan 3 complete with commit refs + DoD ledger
- PRIMEVUE_COMPONENTS: v2 primitives registry (8 components), statusSeverity SoT, Menubar-wrap pattern
- ARCH-TESTING: mount-helper type convention (Plan 3 codified, Plan 4 carry-over)
- FRONTEND-TOOLING: scoped lint invocation note (DoD #13 root cause)
- AppDialog.stories.ts: rename title to 'Shared/AppDialog' for sibling consistency

apps/app/src/components-v2/shared/AppDialog.stories.ts

@@ -9,7 +9,7 @@ import AppDialog from '@/components-v2/shared/AppDialog.vue'
  * and renders the dialog open by default for autodocs visibility.
  */
 const meta: Meta<typeof AppDialog> = {
-  title: 'v2 Shell/AppDialog',
+  title: 'Shared/AppDialog',
   component: AppDialog,
   tags: ['autodocs'],
   argTypes: {