fix: restore video chat visibility and correct video route branch

app/(chat)/api/chat/route.ts

@@ -3471,7 +3471,9 @@ export async function POST(request: Request) {
           effectiveProviderType === "doubao-video" ||
           actualModelId.includes("seedance");
         const isOpenAICompatImageModel =
-          resolvedModelSupportsImageGen && providerType === "openai.chat";
+          resolvedModelSupportsImageGen &&
+          providerType === "openai.chat" &&
+          !isVolcanoVideoModel;
         console.log("[Chat API] Is volcano video model:", isVolcanoVideoModel);
 
         // 🆕 处理 OpenAI 兼容的生图模型输出（防止返回 data:image;base64 原文）

components/elements/message.tsx

@@ -28,7 +28,7 @@ export const MessageContent = ({
 }: MessageContentProps) => (
   <div
     className={cn(
-      "flex flex-col gap-2 overflow-hidden rounded-lg px-4 py-3 text-foreground text-sm",
+      "min-w-0 flex flex-col gap-2 rounded-lg px-4 py-3 text-foreground text-sm",
       "group-[.is-user]:bg-primary group-[.is-user]:text-primary-foreground",
       "group-[.is-assistant]:bg-secondary group-[.is-assistant]:text-foreground",
       "is-user:dark",

components/elements/response.tsx

@@ -220,7 +220,7 @@ export const Response = ({
   ...props
 }: ResponseProps) => {
   const streamdownClassName = cn(
-    "size-full [&>*:first-child]:mt-0 [&>*:last-child]:mb-0 [&_code]:whitespace-pre-wrap [&_code]:break-words [&_pre]:max-w-full [&_pre]:overflow-x-auto",
+    "w-full min-w-0 [&>*:first-child]:mt-0 [&>*:last-child]:mb-0 [&_code]:whitespace-pre-wrap [&_code]:break-words [&_pre]:max-w-full [&_pre]:overflow-x-auto",
     className
   );
   const processingKey = `${isProcessingEnhance}-${isProcessingRmbg}-${isProcessingExtend}-${isProcessingAngleEdit}-${isProcessingWatermarkRemove}`;

components/message.tsx

@@ -145,7 +145,7 @@ const PurePreviewMessage = ({
   regenerate,
   sendMessage,
   isReadonly,
-  requiresScrollPadding: _requiresScrollPadding,
+  requiresScrollPadding,
   onImageEdit,
   onDrawingComplete,
   onImageEnhance,
@@ -208,7 +208,7 @@ const PurePreviewMessage = ({
         )}
 
         <div
-          className={cn("flex flex-col", {
+          className={cn("flex min-w-0 flex-col", {
             "gap-2 md:gap-4": message.parts?.some(
               (p) => p.type === "text" && p.text?.trim()
             ),
@@ -475,6 +475,7 @@ const PurePreviewMessage = ({
           )}
         </div>
       </div>
+      {requiresScrollPadding ? <div className="h-20 md:h-24" /> : null}
     </div>
   );
 };