Scaffold web frontend: mock-backed chat + PDF split-view, Tailwind/shadcn

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

@@ -0,0 +1,18 @@
+export interface Citation {
+  drugName: string;
+  sectionType: string;
+  sourcePageRange: [number, number];
+}
+
+export interface ChatMessage {
+  id: string;
+  role: "user" | "assistant";
+  content: string;
+  citations?: Citation[];
+  disclaimer?: string;
+  createdAt: string;
+}
+
+export interface SendMessageResponse {
+  message: ChatMessage;
+}

packages/shared-types/src/index.ts

@@ -1 +1 @@
-export {};
+export * from "./dto/chat";