fix: animate tool paths in sorted chat mode

Adds animated reveals for file path tool descriptions
Keeps sorted mode tool animations working without extra chat gaps
Preserves file icons, truncation, and click behavior

packages/ui/src/components/chat/MessageList.tsx

@@ -700,6 +700,7 @@ const TurnBlock = React.memo(({
             const isFirstAssistant = assistantIndex === 0;
             const isLastAssistant = assistantIndex === visibleAssistantMessages.length - 1;
             const isActivityOwner = Boolean(activityOwnerMessageId) && message.info.id === activityOwnerMessageId;
+            const hasAnchoredActivitySegment = visibleActivitySegments.some((segment) => segment.anchorMessageId === message.info.id);
             const shouldAttachFullTurnContext = chatRenderMode === 'sorted'
                 ? isAssistantMessage
                 : (isActivityOwner || isFirstAssistant || isLastAssistant);
@@ -722,7 +723,11 @@ const TurnBlock = React.memo(({
                     activityOwnerMessageId,
                     isFirstAssistantInTurn: isFirstAssistant,
                     isLastAssistantInTurn: isLastAssistant,
-                    isWorking: isLastTurn && sessionIsWorking && message.info.id === streamingAssistantMessageId,
+                    isWorking: isLastTurn && sessionIsWorking && (
+                        chatRenderMode === 'sorted'
+                            ? hasAnchoredActivitySegment
+                            : message.info.id === streamingAssistantMessageId
+                    ),
                     hasTools: turn.hasTools,
                     hasReasoning: turn.hasReasoning,
                     ...(shouldAttachFullTurnContext ? {
@@ -777,6 +782,7 @@ const TurnBlock = React.memo(({
             activeStreamingPhase,
             visibleAssistantMessages,
             visibleAssistantIds,
+            visibleActivitySegments,
             activityOwnerMessageId,
             shouldAnimateUserMessage,
             onUserAnimationConsumed,

packages/ui/src/components/chat/message/parts/ProgressiveGroup.tsx

@@ -242,18 +242,19 @@ const getRelativePathFromDirectory = (filePath: string, currentDirectory: string
     return normalizedPath;
 };
 
-const renderReadFilePath = (displayPath: string) => {
+const renderReadFilePath = (displayPath: string, animate = true) => {
     const lastSlash = displayPath.lastIndexOf('/');
 
     if (lastSlash === -1) {
         return (
-            <span
+            <Text
+                variant={animate ? 'generate-effect' : 'static'}
                 className="min-w-0 flex-1 truncate whitespace-nowrap typography-meta leading-5"
                 style={{ color: 'var(--tools-title)' }}
                 title={displayPath}
             >
                 {displayPath}
-            </span>
+            </Text>
         );
     }
 
@@ -277,7 +278,13 @@ const renderReadFilePath = (displayPath: string) => {
                 {displayDir}
             </span>
             <span className="flex-shrink-0" style={{ color: 'var(--tools-description)' }}>/</span>
-            <span className="flex-shrink-0" style={{ color: 'var(--tools-title)' }}>{name}</span>
+            <Text
+                variant={animate ? 'generate-effect' : 'static'}
+                className="flex-shrink-0"
+                style={{ color: 'var(--tools-title)' }}
+            >
+                {name}
+            </Text>
         </span>
     );
 };
@@ -682,7 +689,7 @@ const StaticToolRowInner: React.FC<{
                         title={entry.offset ? `${entry.displayPath}:${entry.offset}` : entry.displayPath}
                     >
                         {showToolFileIcons ? <FileTypeIcon filePath={entry.path} className="h-3.5 w-3.5" /> : null}
-                        {renderReadFilePath(entry.displayPath)}
+                        {renderReadFilePath(entry.displayPath, animateTailText)}
                     </button>
                 ))
                 : null}

packages/ui/src/components/chat/message/parts/ToolPart.tsx

@@ -1359,20 +1359,20 @@ const renderPathLikeGitChanges = (path: string, grow = true) => {
     );
 };
 
-const renderAnimatedPathWithIcon = (path: string, _animate = true, grow = true, showFileIcons = true) => {
-    void _animate;
+const renderAnimatedPathWithIcon = (path: string, animate = true, grow = true, showFileIcons = true) => {
     const lastSlash = path.lastIndexOf('/');
 
     if (lastSlash === -1) {
         return (
             <span className={cn('min-w-0 inline-flex items-center gap-1 overflow-hidden', grow && 'flex-1')} title={path}>
                 {showFileIcons ? <FileTypeIcon filePath={path} className="h-3.5 w-3.5 flex-shrink-0" /> : null}
-                <span
+                <Text
+                    variant={animate ? 'generate-effect' : 'static'}
                     className={cn('min-w-0 truncate whitespace-nowrap typography-meta', grow && 'flex-1')}
                     style={{ color: 'var(--tools-title)' }}
                 >
                     {path}
-                </span>
+                </Text>
             </span>
         );
     }
@@ -1399,9 +1399,13 @@ const renderAnimatedPathWithIcon = (path: string, _animate = true, grow = true,
                     {displayDir}
                 </span>
                 <span className="flex-shrink-0" style={{ color: 'var(--tools-description)' }}>/</span>
-                <span className="flex-shrink-0" style={{ color: 'var(--tools-title)' }}>
+                <Text
+                    variant={animate ? 'generate-effect' : 'static'}
+                    className="flex-shrink-0"
+                    style={{ color: 'var(--tools-title)' }}
+                >
                     {name}
-                </span>
+                </Text>
             </span>
         </span>
     );