fix detail workspace layout gap by filtering non-renderable chat messages

components/canvas/CanvasChatPanel.tsx

@@ -3010,7 +3010,69 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
   );
   const shouldShowImageLoading = hasGenerationStart && !hasGenerationEnd && !!currentModel;
   const loadingImageCount = imageParams.imageCount || 1;
-  const isDetailEmptyState = isDetailGenerationMode && visibleMessages.length === 0;
+  const renderableVisibleMessages = useMemo(() => {
+    return visibleMessages.reduce<ChatMessage[]>((acc, message) => {
+      const rawParts = (message.parts || []) as any[];
+      const cleanedParts = rawParts.map((part: any) => {
+        if (part.type === "text" && part.text) {
+          return {
+            ...part,
+            text: String(part.text)
+              .replace(/\n*<!-- GENERATING_IMAGE -->\n*/g, "")
+              .replace(/\n*<!-- IMAGE_GENERATION_START -->\n*/g, "")
+              .replace(/\n*<!-- IMAGE_GENERATION_END -->\n*/g, "")
+              .trim(),
+          };
+        }
+        return part;
+      });
+
+      const fallbackContent =
+        typeof (message as any).content === "string"
+          ? String((message as any).content).trim()
+          : "";
+
+      if (cleanedParts.length === 0 && fallbackContent) {
+        cleanedParts.push({ type: "text", text: fallbackContent } as any);
+      }
+
+      let hasContent = false;
+      for (const part of cleanedParts) {
+        if (part?.type === "text" && part?.text && String(part.text).trim().length > 0) {
+          hasContent = true;
+          break;
+        }
+        const fileUrl =
+          typeof part?.url === "string" && part.url.trim()
+            ? part.url
+            : typeof part?.data === "string" && part.data.trim()
+              ? part.data
+              : "";
+        if ((part?.type === "file" || part?.type === "image") && fileUrl) {
+          hasContent = true;
+          break;
+        }
+      }
+
+      const attachmentsList = (message as any).attachments || [];
+      if (!hasContent && attachmentsList.length > 0) {
+        hasContent = true;
+      }
+
+      if (!hasContent) {
+        return acc;
+      }
+
+      acc.push({ ...message, parts: cleanedParts } as ChatMessage);
+      return acc;
+    }, []);
+  }, [visibleMessages]);
+
+  const isDetailEmptyState =
+    isDetailGenerationMode &&
+    renderableVisibleMessages.length === 0 &&
+    !isLoading &&
+    !shouldShowImageLoading;
 
   const renderModelSelectContent = () => (
     <SelectContent className="w-[238px] max-h-[340px] overflow-hidden rounded-[18px] border border-[#cfd4dc] bg-[#f3f4f6] p-1.5 shadow-[0_8px_20px_rgba(15,23,42,0.13)]">
@@ -3170,19 +3232,19 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
       
       {/* 消息列表 */}
       {isDetailEmptyState ? (
-        <div className="h-16 shrink-0" />
+        <div className="h-3 shrink-0" />
       ) : (
       <div
         key={`${activeChatId}-${messageViewportKey}`}
         className={cn(
           "flex-1 min-h-0 overflow-y-auto overflow-x-hidden p-4",
-          isDetailGenerationMode && visibleMessages.length === 0
+          isDetailGenerationMode && renderableVisibleMessages.length === 0
             ? "pt-10"
             : "pt-4"
         )}
       >
         <div className="space-y-6 overflow-x-hidden pb-24 pr-1">
-          {!isDetailGenerationMode && visibleMessages.length === 0 && (
+          {!isDetailGenerationMode && renderableVisibleMessages.length === 0 && (
             <div className={cn("flex flex-col h-full", isDetailGenerationMode ? "pt-0" : "pt-4")}>
               {/* Greeting */}
               <div className={cn(isDetailGenerationMode ? "mb-4" : "mb-8")}>
@@ -3219,66 +3281,9 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
             </div>
           )}
           
-          {visibleMessages.map((message) => {
-            // 🆕 清理消息中的内部标记并检查是否有实际内容
-            const rawParts = message.parts || [];
-            const cleanedParts = rawParts.map((part: any) => {
-              if (part.type === 'text' && part.text) {
-                return {
-                  ...part,
-                  text: part.text
-                    .replace(/\n*<!-- GENERATING_IMAGE -->\n*/g, "")
-                    .replace(/\n*<!-- IMAGE_GENERATION_START -->\n*/g, "")
-                    .replace(/\n*<!-- IMAGE_GENERATION_END -->\n*/g, "")
-                    .trim()
-                };
-              }
-              return part;
-            });
-
-            const fallbackContent =
-              typeof (message as any).content === "string"
-                ? (message as any).content.trim()
-                : "";
-            if (cleanedParts.length === 0 && fallbackContent) {
-              cleanedParts.push({ type: "text", text: fallbackContent } as any);
-            }
-            
-            // 检查清理后是否有实际内容（更严格的检查）
-            let hasContent = false;
-            for (const part of cleanedParts) {
-              if (part.type === 'text' && part.text && part.text.trim().length > 0) {
-                hasContent = true;
-                break;
-              }
-              const fileUrl =
-                typeof part?.url === "string" && part.url.trim()
-                  ? part.url
-                  : typeof part?.data === "string" && part.data.trim()
-                    ? part.data
-                    : "";
-              if ((part.type === 'file' || part.type === 'image') && fileUrl) {
-                hasContent = true;
-                break;
-              }
-            }
-            
-            // 同时检查附件
-            const attachmentsList = (message as any).attachments || [];
-            if (attachmentsList.length > 0) {
-              hasContent = true;
-            }
-            
-            // 没有内容则不渲染（包括空 parts 的情况）
-            if (!hasContent) {
-              console.log('[CanvasChat] 跳过空消息:', message.id);
-              return null;
-            }
-            
-            // 使用清理后的消息
-            const cleanedMessage = { ...message, parts: cleanedParts };
+          {renderableVisibleMessages.map((message) => {
             const assistantTextParts = message.role === "assistant"
-              ? cleanedParts.filter((part: any) => part.type === "text" && part.text)
+              ? (message.parts || []).filter((part: any) => part.type === "text" && part.text)
               : [];
             const hasAssistantImages = assistantTextParts.some((part: any) =>
               extractImageUrls(part.text || "").length > 0
@@ -3335,7 +3340,7 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
                       {(() => {
                         const renderedUserParts: React.ReactNode[] = [];
 
-                        cleanedMessage.parts?.forEach((part: any, idx: number) => {
+                        message.parts?.forEach((part: any, idx: number) => {
                           const fileUrl =
                             typeof part?.url === "string" && part.url.trim()
                               ? part.url
@@ -3372,7 +3377,7 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
                         });
 
                         if (
-                          !cleanedMessage.parts?.some((p: any) => p.type === 'file') &&
+                          !message.parts?.some((p: any) => p.type === 'file') &&
                           (message as any).attachments?.length > 0
                         ) {
                           (message as any).attachments.forEach((att: any, idx: number) => {
@@ -3395,7 +3400,7 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
 
                         if (renderedUserParts.length === 0) {
                           const fallbackText =
-                            extractUserTextPrompt(cleanedMessage as any) ||
+                            extractUserTextPrompt(message as any) ||
                             (isVideoModel ? "已发送视频生成请求" : "已发送请求");
                           renderedUserParts.push(
                             <span key="fallback-text" className="text-sm text-foreground">
@@ -3420,7 +3425,7 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
                   >
                     {/* 消息内容 */}
                     <div className="w-full min-w-0 whitespace-pre-wrap break-words [overflow-wrap:anywhere] leading-relaxed">
-                      {cleanedMessage.parts?.map((part: any, i: number) => {
+                      {message.parts?.map((part: any, i: number) => {
                         if (part.type === 'text') {
                           // 提取并显示图片/视频
                           const rawText = part.text || '';
@@ -3568,7 +3573,7 @@ export function CanvasChatPanel({ chatId, initialMessages = [], onClose, onOpenF
               className={cn(
                 "mx-3 overflow-y-auto rounded-2xl border border-black/10 bg-white/95 p-3 pr-2",
                 "mt-3",
-                visibleMessages.length === 0 ? "max-h-[62vh]" : "max-h-[54vh]"
+                renderableVisibleMessages.length === 0 ? "max-h-[62vh]" : "max-h-[54vh]"
               )}
             >
               <div className="flex items-start justify-between gap-3">