style: format the repo with prettier (green format:check)

`npm run format:check` (a CI gate) had drifted red across 44 files — pre-existing
files plus recently-added ones committed without formatting. Ran `prettier --write .`;
no logic changes. Also regenerates documentation.json (compodoc reflects the reformatted
component sources).

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

src/app/brief/domain/besluit.ts

@@ -66,7 +66,8 @@ export function inferSelection(
     const source = byId.get(b.sourcePassageId);
     if (!source) continue;
     if (source.besluit !== undefined) besluit = source.besluit;
-    if (source.reason !== undefined && !reasons.includes(source.reason)) reasons.push(source.reason);
+    if (source.reason !== undefined && !reasons.includes(source.reason))
+      reasons.push(source.reason);
   }
   return { besluit, reasons };
 }