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-layout/tests/app-frame.spec.tsx

@@ -164,7 +164,7 @@ describe('AppFrame', () => {
   })
 
   it('renders both column occupants before baselines settle (no loading gate)', () => {
-    // User ruling: the bare loading status looked worse than the shell's own
+    // No loading gate: a bare loading status reads worse than the shell's own
     // pending rendering — both occupants mount from first paint.
     baselinesReady.current = false
     const { slotCalls } = mountFrame()