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-sidebar/src/client/SidebarRoot.module.css

@@ -96,7 +96,7 @@
 }
 
 /* Brand group (figma I133:7632): the full wordmark rides the text ink
-   (figma-flows ruling: main-screen instance is black; blue is brand
+   (figma flows: the main-screen instance is black; blue is brand
    emphasis only). A button only in behavior (New Session shortcut): the
    pointer cursor is the sole affordance — no hover chrome on the mark. */
 .brand {