refactor: strip WP-/RB- ticket refs from apps and libs (RD-18)

204 WP-NN/RB-NN comments named a closed ticket instead of the code they
sit next to. git blame already records history and stays correct when
code moves; the comment does not. This sweep removes the reference and
keeps the sentence, across 95 files in apps/ and libs/ plus the
behaviour-spec generator's header text.

Eleven references stay: five story files justify an a11y disable per
the README's rule, and one line in a11y.mdx documents that convention.
Two sentences needed a rewrite, not a deletion, so the reference's
meaning survives its removal. behaviour-spec.mdx is regenerated, not
hand-edited.

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

apps/ssp/src/app/brief/ui/letter-canvas/letter-canvas.component.ts

@@ -53,9 +53,9 @@ const A4_HEIGHT_PX = (297 * 96) / 25.4;
     footer around the case-type template's sections. `editableRegions` picks who edits
     what: `'content'` hosts the editable letter-sections in place (drafter), `'none'`
     renders everything read-only (approver/locked, absorbs the old letter-preview),
-    `'template'` reserves the org-identity regions for the admin editor (WP-26).
+    `'template'` reserves the org-identity regions for the admin editor.
     Letter typography/geometry come from the shared `public/letter.css` contract —
-    the same file the backend preview renderer inlines (WP-25). */
+    the same file the backend preview renderer inlines. */
 @Component({
   selector: 'app-letter-canvas',
   imports: [NgTemplateOutlet, ButtonComponent, PlaceholderChipComponent],
@@ -82,7 +82,7 @@ const A4_HEIGHT_PX = (297 * 96) / 25.4;
         color: var(--rhc-color-foreground-subtle);
         font-variant-numeric: tabular-nums;
       }
-      /* Rejection-diff badge (WP-27): a small pill above a changed/added block. */
+      /* Rejection-diff badge: a small pill above a changed/added block. */
       .diff-block.diff-changed {
         border-inline-start: 3px solid var(--rhc-color-oranje-500);
         padding-inline-start: var(--rhc-space-max-sm);
@@ -98,7 +98,7 @@ const A4_HEIGHT_PX = (297 * 96) / 25.4;
         background: var(--rhc-color-oranje-500);
       }
       .diff-badge.added {
-        /* added = white on groen-700 (6.4:1); dark text on any green fails 4.5:1 (WP-29 axe). */
+        /* added = white on groen-700 (6.4:1); dark text on any green fails 4.5:1 (axe). */
         color: var(--rhc-color-wit);
         background: var(--rhc-color-groen-700);
       }
@@ -345,12 +345,12 @@ export class LetterCanvasComponent {
   brief = input.required<Brief>();
   orgTemplate = input.required<OrgTemplate>();
   /** Who edits what on the surface: read-only ('none', the drafter preview + approver
-      view) or admin editor ('template', WP-26). Authoring moved to letter-editor. */
+      view) or admin editor ('template'). Authoring moved to letter-editor. */
   editableRegions = input<'template' | 'none'>('none');
   diagnostics = input<readonly Diagnostic[]>([]);
-  /** Initial zoom; the in-canvas controls take over from here (WP-27). */
+  /** Initial zoom; the in-canvas controls take over from here. */
   zoom = input(1);
-  /** Blocks changed/added/removed since the letter was rejected (WP-27); badged when
+  /** Blocks changed/added/removed since the letter was rejected; badged when
       `showDiff` is on. Removed blocks aren't in the map's rendered set — they no longer
       exist in the letter — the composer surfaces them as a count. */
   blockDiffs = input<ReadonlyMap<string, BlockDiffKind>>(new Map());
@@ -445,7 +445,7 @@ export class LetterCanvasComponent {
 
   constructor() {
     // ponytail: whole-surface height / A4-interval — ignores that a break never truly
-    // falls mid-line; the caption says "±" and WP-25's server preview is authoritative.
+    // falls mid-line; the caption says "±" and the server preview is authoritative.
     const observer = new ResizeObserver(([entry]) => {
       // ~1cm tolerance so a letter ending on a page boundary gets no edge-hugging mark.
       const pages = Math.ceil((entry.target.scrollHeight - 40) / A4_HEIGHT_PX);