docs: purge chain-of-thought leakage from prose

Delete design-session citations (decision/audit/plan ordinals, stack
positions), change narration, review choreography, and reviewer-addressed
justification from comments, JSDoc, docs, READMEs, Agent Notes, tests, and
generator templates; restate every affected fact as current-state contract
prose. Fix generated docs at their sources and regenerate the catalogs and
cordis-surface regions; re-paste type-equiv blocks; update every bilingual
counterpart and re-record the pairs. Record the citation rule in the
committed-artifact-citations Agent Note.

packages/client/ui-settings/src/client/contract/slots.ts

@@ -62,7 +62,7 @@ declare module '@deepseek-ai/dsh-client-ui-slots' {
      * OnboardingSurface primitive (mask, opaque stage, `#root` inert) and
      * renders null while its private facts are still loading — the shell
      * paints no chrome of its own, so a mounted-but-deciding step shows and
-     * blocks nothing (the reload white-flash fix; a bare unwrapped step
+     * blocks nothing (prevents a white flash on reload: a bare unwrapped step
      * would render without mask or stage).
      */
     'settings.onboarding': { kind: 'list'; scope: 'root'; owner: SettingsOnboardingOwnerProps }
@@ -87,7 +87,7 @@ export interface SettingsHeaderOwnerProps {
  * arrives through their own inject faces and stores).
  */
 export interface SettingsSectionOwnerProps {
-  /** Marker field: section owner props are intentionally empty for now. */
+  /** Marker field: section owner props are intentionally empty. */
   children?: never
 }