Remove corpus counts from chat chrome

packages/shared-types/src/dto/chat.ts

@@ -23,6 +23,26 @@ export interface Citation {
   sourceCropUrl?: string;
 }
 
+export interface AnswerClaim {
+  text: string;
+  /** Stable backend chunk ids; resolved against `message.citations` by the UI. */
+  sourceIds: string[];
+}
+
+export interface AnswerBlock {
+  title: string;
+  kind: "fact_list" | "warning" | "dosage" | string;
+  claims: AnswerClaim[];
+}
+
+export interface AnswerPlan {
+  verbosity: "concise" | "normal" | "detailed";
+  layout: "prose" | "bullet_list" | "dosage" | string;
+  reasoningMode: "direct_lookup" | "synthesis" | "grounded_inference" | string;
+  showHeading: boolean;
+  needsWarning: boolean;
+}
+
 export interface ChatMessage {
   id: string;
   role: "user" | "assistant";
@@ -44,6 +64,10 @@ export interface ChatMessage {
    * and the UI must fall back to free text either way.
    */
   quickReplies?: string[];
+  /** Verified semantic structure from the answer service; never inferred from prose by the UI. */
+  blocks?: AnswerBlock[];
+  answerMode?: "concise" | "normal" | "detailed";
+  answerPlan?: AnswerPlan;
 }
 
 export interface SendMessageRequest {