feat(chat): sync multi-role backend APIs

src/app/chat/__tests__/chat-unlock-coordinator.test.ts

@@ -20,7 +20,7 @@ const defaultScope = {
 };
 
 const promotionSession: PendingChatPromotion = {
-  characterId: "character_elio",
+  characterId: "elio",
   promotionType: "image",
   lockType: "image_paywall",
   clientLockId: "promotion-1",
@@ -182,7 +182,7 @@ function createPendingUnlock(
 ): PendingChatUnlock {
   return {
     reason: "single_message_unlock",
-    characterId: "character_elio",
+    characterId: "elio",
     ...input,
     stage: "auth",
     createdAt: 1,

src/app/chat/chat-screen.tsx

@@ -13,6 +13,9 @@ import {
   useActiveCharacter,
   useActiveCharacterRoutes,
 } from "@/providers/character-provider";
+import { useCharacterCatalog } from "@/providers/character-catalog-provider";
+import { clearPendingChatNavigation } from "@/lib/navigation/chat_unlock_session";
+import { getCharacterRoutes } from "@/router/routes";
 
 import { MobileShell } from "@/app/_components/core";
 
@@ -50,6 +53,9 @@ const chatShellStyle = {
 export function ChatScreen() {
   const router = useRouter();
   const character = useActiveCharacter();
+  const characterCatalog = useCharacterCatalog();
+  const refreshCharacterCatalog = characterCatalog.refresh;
+  const defaultCharacterSlug = characterCatalog.defaultCharacter.slug;
   const characterRoutes = useActiveCharacterRoutes();
   const searchParams = useSearchParams();
   const state = useChatState();
@@ -133,6 +139,42 @@ export function ChatScreen() {
     state.historyLoaded,
   ]);
 
+  useEffect(() => {
+    const errorCode = state.characterErrorCode;
+    if (errorCode === "CHARACTER_MISMATCH") {
+      chatDispatch({ type: "ChatHistoryRefreshRequested" });
+      return;
+    }
+    if (
+      errorCode !== "CHARACTER_DISABLED" &&
+      errorCode !== "CHARACTER_NOT_FOUND"
+    ) {
+      return;
+    }
+
+    let cancelled = false;
+    void (async () => {
+      if (errorCode === "CHARACTER_NOT_FOUND") {
+        await clearPendingChatNavigation();
+      }
+      await refreshCharacterCatalog();
+      if (!cancelled) {
+        router.replace(
+          getCharacterRoutes(defaultCharacterSlug).splash,
+        );
+      }
+    })();
+    return () => {
+      cancelled = true;
+    };
+  }, [
+    chatDispatch,
+    defaultCharacterSlug,
+    refreshCharacterCatalog,
+    router,
+    state.characterErrorCode,
+  ]);
+
   function handleUnlockPrivateMessage(messageId: string): void {
     unlockCoordinator.requestMessageUnlock(messageId, "private");
   }
@@ -223,7 +265,9 @@ export function ChatScreen() {
               onUnlock={messageLimitBanner.unlock}
             />
           ) : (
-            <ChatInputBar disabled={!state.historyLoaded} />
+            <ChatInputBar
+              disabled={!state.historyLoaded || !state.canSendMessage}
+            />
           )}
         </div>
 

src/app/chat/components/__tests__/chat-area-scroll.test.tsx

@@ -235,7 +235,7 @@ function renderChatArea(
   act(() => {
     root.render(
       <ChatArea
-        characterId="character_elio"
+        characterId="elio"
         messages={messages}
         isReplyingAI={false}
         initialScrollReady={initialScrollReady}

src/app/chat/components/__tests__/tailwind-components.test.tsx

@@ -127,7 +127,7 @@ describe("chat Tailwind components", () => {
   it("renders ImageBubble openable and paywalled states", () => {
     const openableHtml = renderToStaticMarkup(
       <ImageBubble
-        characterId="character_elio"
+        characterId="elio"
         messageId="message-1"
         imageUrl="/chat-image.png"
         onOpenImage={() => undefined}
@@ -135,7 +135,7 @@ describe("chat Tailwind components", () => {
     );
     const paywalledHtml = renderToStaticMarkup(
       <ImageBubble
-        characterId="character_elio"
+        characterId="elio"
         imageUrl="/locked-image.png"
         imagePaywalled
       />,

src/app/chat/components/chat-input-text-field.tsx

@@ -73,6 +73,7 @@ export const ChatInputTextField = forwardRef<
         onBlur={() => onFocusChange?.(false)}
         placeholder={placeholder}
         disabled={disabled}
+        maxLength={4000}
         autoFocus={autoFocus}
         rows={1}
         aria-label="Message"

src/app/chat/layout.tsx

@@ -1,9 +0,0 @@
-import type { ReactNode } from "react";
-
-export default function LegacyChatLayout({
-  children,
-}: {
-  children: ReactNode;
-}) {
-  return children;
-}