fix: show activity status for approval-flow tools and revert chip override

- Call onToolRunning on tool_state_change with state 'running' so the
activity bar updates for approval-flow tools (hf_jobs, sandbox_create)
- Revert description override in ToolCallGroup status chip

frontend/src/components/Chat/ToolCallGroup.tsx

@@ -496,9 +496,7 @@ export default function ToolCallGroup({ tools, approveTools }: ToolCallGroupProp
           const displayState = isPending && localDecision
             ? (localDecision.approved ? 'input-available' : 'output-denied')
             : state;
-          const baseLabel = statusLabel(displayState as ToolPartState);
-          const toolDescription = (tool.input as Record<string, unknown>)?.description as string | undefined;
-          const label = baseLabel ? (toolDescription || baseLabel) : null;
+          const label = statusLabel(displayState as ToolPartState);
 
           // Parse job metadata from hf_jobs output and store
           const jobUrlFromStore = tool.toolName === 'hf_jobs' ? getJobUrl(tool.toolCallId) : undefined;

frontend/src/lib/ws-chat-transport.ts

@@ -547,6 +547,7 @@ export class WebSocketChatTransport implements ChatTransport<UIMessage> {
       case 'tool_state_change': {
         const tcId = (event.data?.tool_call_id as string) || '';
         const state = (event.data?.state as string) || '';
+        const toolName = (event.data?.tool as string) || '';
         const jobUrl = (event.data?.jobUrl as string) || undefined;
 
         if (tcId.startsWith('plan_tool')) break;
@@ -555,6 +556,10 @@ export class WebSocketChatTransport implements ChatTransport<UIMessage> {
           useAgentStore.getState().setJobUrl(tcId, jobUrl);
         }
 
+        if (state === 'running' && toolName) {
+          this.sideChannel.onToolRunning(toolName);
+        }
+
         if (this.streamController && (state === 'rejected' || state === 'abandoned')) {
           this.enqueue({ type: 'tool-output-denied', toolCallId: tcId });
         }