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.

apps/web/tests/turn-tail-actions.e2e.ts

@@ -1,6 +1,6 @@
 // Web e2e scenario: assistant IconActions belong to the settled answer, so
 // they arrive with `turn/end` and not before. The recorded turn narrates in
-// plain text before its tool call, which is the shape that used to hand the
+// plain text before its tool call, which is the shape that would hand the
 // footer to mid-turn narration for the seconds a tool runs and then move it
 // down. A `hang` sidecar on the SECOND model call parks the turn after the
 // narration and the tool result are durable, so the running state is stable by