feat(fp): WP-13 — CIBG-gap register + hygiene + MDX

Mark every hand-rolled shared/ui surface with a `// CIBG-GAP EXTENSION:`
comment + `cibgGap` story parameter (skeleton, spinner, rich-text-editor,
wizard-shell's error summary, application-link's non-navigating row,
debug-state, status-badge, card, placeholder-chip) so deviations from the
CIBG design system are auditable. Add the register MDX
(Foundations/CIBG Gap Register), cross-linked from ADR-0003. Delete the
near-identity upload-status-banner wrapper; its one consumer now uses
<app-alert> directly (a story added to keep the info-banner state covered).

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

src/app/shared/ui/debug-state/debug-state.component.ts

@@ -6,6 +6,8 @@ import { BigProfileStore } from '@registratie/application/big-profile.store';
 import { map } from '@shared/application/remote-data';
 import { maskBsn, redactProfile } from './mask';
 
+// CIBG-GAP EXTENSION: n/a — devtool, no corresponding CIBG concept; deliberately
+// off-theme by design (see the ponytail note below), see cibg-gaps.mdx.
 /**
  * Dev-only "show the current Model" panel (Elm-debugger style, read-only).
  * Observes the root singletons and renders them via the json pipe. Never a

src/app/shared/ui/debug-state/debug-state.stories.ts

@@ -5,6 +5,10 @@ import { DebugStateComponent } from './debug-state.component';
 const meta: Meta<DebugStateComponent> = {
   title: 'Devtools/State debug',
   component: DebugStateComponent,
+  parameters: {
+    cibgGap: true,
+    docs: { description: { component: 'CIBG-gap extension — see Foundations/CIBG Gap Register.' } },
+  },
 };
 export default meta;
 type Story = StoryObj<DebugStateComponent>;