feat(ui): dynamic processing timer + total completion time on plan finalize

src/App/src/components/common/ProcessingStatusIndicator.tsx

@@ -0,0 +1,51 @@
+import { Spinner } from '@fluentui/react-components';
+import { formatElapsedTime } from '@/utils';
+
+interface ProcessingStatusIndicatorProps {
+    message: string;
+    elapsedSeconds?: number;
+}
+
+const ProcessingStatusIndicator = ({
+    message,
+    elapsedSeconds,
+}: ProcessingStatusIndicatorProps) => {
+    const showElapsedSuffix = typeof elapsedSeconds === 'number' && elapsedSeconds > 0;
+    const elapsedSuffix = showElapsedSuffix ? ` (${formatElapsedTime(elapsedSeconds)})` : '';
+
+    return (
+        <div
+            style={{
+                maxWidth: '800px',
+                margin: '0 auto 32px auto',
+                padding: '0 24px',
+            }}
+        >
+            <div
+                style={{
+                    display: 'flex',
+                    alignItems: 'center',
+                    gap: '16px',
+                    backgroundColor: 'var(--colorNeutralBackground2)',
+                    borderRadius: '8px',
+                    border: '1px solid var(--colorNeutralStroke1)',
+                    padding: '16px',
+                }}
+            >
+                <Spinner size="small" />
+                <span
+                    style={{
+                        fontSize: '14px',
+                        color: 'var(--colorNeutralForeground1)',
+                        fontWeight: '500',
+                    }}
+                >
+                    {message}
+                    {elapsedSuffix}
+                </span>
+            </div>
+        </div>
+    );
+};
+
+export default ProcessingStatusIndicator;

src/App/src/components/content/PlanChat.tsx

@@ -21,6 +21,8 @@ interface SimplifiedPlanChatProps extends PlanChatProps {
   showBufferingText: boolean;
   agentMessages: AgentMessageData[];
   showProcessingPlanSpinner: boolean;
+  processingElapsedSeconds: number;
+  processingStatusMessage: string;
   showApprovalButtons: boolean;
   handleApprovePlan: () => Promise<void>;
   handleRejectPlan: () => Promise<void>;
@@ -45,13 +47,13 @@ const PlanChat: React.FC<SimplifiedPlanChatProps> = ({
   showBufferingText,
   agentMessages,
   showProcessingPlanSpinner,
+  processingElapsedSeconds,
+  processingStatusMessage,
   showApprovalButtons,
   handleApprovePlan,
   handleRejectPlan,
   processingApproval
 }) => {
-  // States
-
   if (!planData)
     return (
       <ContentNotFound subtitle="The requested page could not be found." />
@@ -86,7 +88,7 @@ const PlanChat: React.FC<SimplifiedPlanChatProps> = ({
         {renderPlanResponse(planApprovalRequest, handleApprovePlan, handleRejectPlan, processingApproval, showApprovalButtons)}
         {renderAgentMessages(agentMessages, undefined, undefined, finalResultRef)}
 
-        {showProcessingPlanSpinner && renderPlanExecutionMessage()}
+        {showProcessingPlanSpinner && renderPlanExecutionMessage(processingElapsedSeconds, processingStatusMessage)}
         {/* Streaming plan updates — hidden while an approval prompt is pending so
             the approval action is presented at the appropriate step instead of
             after the thinking process visibly completes. */}

src/App/src/components/content/streaming/StreamingPlanState.tsx

@@ -1,4 +1,5 @@
 import { Spinner } from "@fluentui/react-components";
+import ProcessingStatusIndicator from "../../common/ProcessingStatusIndicator.tsx";
 
 // Simple thinking message to show while creating plan
 const renderThinkingState = (waitingForPlan: boolean) => {
@@ -54,32 +55,15 @@ const renderThinkingState = (waitingForPlan: boolean) => {
 };
 
 // Simple message to show while executing the plan
-const renderPlanExecutionMessage = () => {
+const renderPlanExecutionMessage = (
+    processingElapsedSeconds?: number,
+    processingStatusMessage = 'Processing your plan and coordinating with AI agents...',
+) => {
     return (
-        <div style={{
-            maxWidth: '800px',
-            margin: '0 auto 32px auto',
-            padding: '0 24px'
-        }}>
-            <div style={{
-                display: 'flex',
-                alignItems: 'center',
-                gap: '16px',
-                backgroundColor: 'var(--colorNeutralBackground2)',
-                borderRadius: '8px',
-                border: '1px solid var(--colorNeutralStroke1)',
-                padding: '16px'
-            }}>
-                <Spinner size="small" />
-                <span style={{
-                    fontSize: '14px',
-                    color: 'var(--colorNeutralForeground1)',
-                    fontWeight: '500'
-                }}>
-                    Processing your plan and coordinating with AI agents...
-                </span>
-            </div>
-        </div>
+        <ProcessingStatusIndicator
+            message={processingStatusMessage}
+            elapsedSeconds={processingElapsedSeconds}
+        />
     );
 };
 

src/App/src/hooks/usePlanWebSocket.tsx

@@ -15,6 +15,7 @@ import {
     selectPlanData,
     selectContinueWithWebsocketFlow,
     selectPlanApproved,
+    selectShowProcessingPlanSpinner,
     approvalRequestReceived,
     planCompletedFinal,
     planFailedFinal,
@@ -44,11 +45,11 @@ import {
     ProcessedPlanData,
 } from '@/models';
 import { APIService } from '@/api/apiService';
+import { ToastIntent } from '@/components/toast/InlineToaster';
+import { formatElapsedTime } from '@/utils';
 
 const apiService = new APIService();
 
-import { ToastIntent } from '@/components/toast/InlineToaster';
-
 interface UsePlanWebSocketProps {
     planId: string | undefined;
     scrollToBottom: () => void;
@@ -99,8 +100,20 @@ export function usePlanWebSocket({
     const dispatch = useAppDispatch();
     const planData = useAppSelector(selectPlanData);
     const planApproved = useAppSelector(selectPlanApproved);
+    const showProcessingPlanSpinner = useAppSelector(selectShowProcessingPlanSpinner);
     const continueWithWebsocketFlow = useAppSelector(selectContinueWithWebsocketFlow);
     const streamingMessageBuffer = useAppSelector(selectStreamingMessageBuffer);
+    const processingStartedAtRef = React.useRef<number | null>(null);
+
+    useEffect(() => {
+        if (showProcessingPlanSpinner) {
+            if (processingStartedAtRef.current === null) {
+                processingStartedAtRef.current = Date.now();
+            }
+        } else {
+            processingStartedAtRef.current = null;
+        }
+    }, [showProcessingPlanSpinner]);
 
     // ── PLAN_APPROVAL_REQUEST ─────────────────────────────────────
     useEffect(() => {
@@ -161,6 +174,7 @@ export function usePlanWebSocket({
                 dispatch(addAgentMessage(agentMessageData));
                 dispatch(setShowBufferingText(false));
                 dispatch(setShowProcessingPlanSpinner(false));
+                processingStartedAtRef.current = null;
                 dispatch(setSubmittingChatDisableInput(false));
                 scrollToBottom();
                 persistAgentMessage(agentMessageData, planData, dispatch);
@@ -181,6 +195,12 @@ export function usePlanWebSocket({
             WebsocketMessageType.FINAL_RESULT_MESSAGE,
             (finalMessage: any) => {
                 if (!finalMessage) return;
+                const completionElapsedSeconds = processingStartedAtRef.current
+                    ? Math.max(Math.round((Date.now() - processingStartedAtRef.current) / 1000), 0)
+                    : null;
+                const completionTimeLine = completionElapsedSeconds !== null
+                    ? `\n\n**Total completion time: ${formatElapsedTime(completionElapsedSeconds)}**`
+                    : '';
                 const messageStatus = finalMessage?.data?.status;
 
                 if (messageStatus === PlanStatus.COMPLETED) {
@@ -190,14 +210,15 @@ export function usePlanWebSocket({
                         timestamp: Date.now(),
                         steps: [],
                         next_steps: [],
-                        content: finalMessage.data?.content || '',
+                        content: (finalMessage.data?.content || '') + completionTimeLine,
                         raw_data: finalMessage,
                     };
                     dispatch(setShowBufferingText(true));
                     dispatch(addAgentMessage(agentMessageData));
                     dispatch(setSelectedTeam(planData?.team || null));
                     /* P0: single compound action replaces setShowProcessingPlanSpinner(false) + markPlanCompleted() */
                     dispatch(planCompletedFinal());
+                    processingStartedAtRef.current = null;
                     scrollToFinalResult();
                     webSocketService.disconnect();
                     persistAgentMessage(agentMessageData, planData, dispatch, true, streamingMessageBuffer);
@@ -256,6 +277,7 @@ export function usePlanWebSocket({
                 };
                 dispatch(addAgentMessage(errorAgent));
                 dispatch(planFailedFinal());
+                processingStartedAtRef.current = null;
                 dispatch(setShowBufferingText(false));
                 dispatch(setSubmittingChatDisableInput(true));
                 scrollToBottom();

src/App/src/pages/PlanPage.tsx

@@ -78,6 +78,30 @@ import '../styles/PlanPage.css';
 // Singleton API service
 const apiService = new APIService();
 
+const getPlanProcessingStatusMessage = (elapsedSeconds: number): string => {
+    if (elapsedSeconds < 8) {
+        return 'Processing your plan and coordinating with AI agents...';
+    }
+
+    if (elapsedSeconds < 20) {
+        return 'Assigning tasks to specialized agents...';
+    }
+
+    if (elapsedSeconds < 35) {
+        return 'Agents are analyzing and researching...';
+    }
+
+    if (elapsedSeconds < 50) {
+        return 'Compiling results from agents...';
+    }
+
+    if (elapsedSeconds < 90) {
+        return 'Finalizing responses...';
+    }
+
+    return 'Still processing, please wait...';
+};
+
 /* ================================================================
  *  PlanPage — refactored to use Redux + extracted hooks
  * ================================================================ */
@@ -114,6 +138,8 @@ const PlanPage: React.FC = () => {
 
     /* ── Cancellation alert hook ────────────────────────────── */
     const [pendingNavigation, setPendingNavigation] = React.useState<(() => void) | null>(null);
+    const [processingElapsedSeconds, setProcessingElapsedSeconds] = React.useState<number>(0);
+    const processingStatusMessage = getPlanProcessingStatusMessage(processingElapsedSeconds);
 
     const { isPlanActive } = usePlanCancellationAlert({
         planData,
@@ -288,6 +314,21 @@ const PlanPage: React.FC = () => {
         return () => clearInterval(interval);
     }, [loading, dispatch]);
 
+    /* ── Plan execution elapsed timer ───────────────────────── */
+    useEffect(() => {
+        if (!showProcessingPlanSpinner) {
+            setProcessingElapsedSeconds(0);
+            return;
+        }
+
+        setProcessingElapsedSeconds(0);
+        const interval = setInterval(() => {
+            setProcessingElapsedSeconds((currentSeconds: number) => currentSeconds + 1);
+        }, 1000);
+
+        return () => clearInterval(interval);
+    }, [showProcessingPlanSpinner]);
+
     /* ── Initial plan load ──────────────────────────────────── */
     useEffect(() => {
         if (!planId) {
@@ -367,6 +408,8 @@ const PlanPage: React.FC = () => {
                                 showBufferingText={showBufferingText}
                                 agentMessages={agentMessages}
                                 showProcessingPlanSpinner={showProcessingPlanSpinner}
+                                processingElapsedSeconds={processingElapsedSeconds}
+                                processingStatusMessage={processingStatusMessage}
                                 showApprovalButtons={showApprovalButtons}
                                 processingApproval={processingApproval}
                                 handleApprovePlan={handleApprovePlan}

src/App/src/utils/index.ts

@@ -8,7 +8,7 @@
  *  - agentIconUtils → agent-to-icon mapping
  */
 
-export { formatDate } from './utils';
+export { formatDate, formatElapsedTime } from './utils';
 export { getErrorMessage, getErrorStyle } from './errorUtils';
 export { formatErrorMessage, extractPlainAnswer, truncate } from './messageUtils';
 export {

src/App/src/utils/utils.tsx

@@ -67,4 +67,27 @@ export const formatDate = (
         });
 
     return formatted;
-}
+}
+
+/**
+ * Formats an elapsed-time duration in seconds for display in processing
+ * indicators and completion messages.
+ *
+ * Examples:
+ *  - 5  → "5s"
+ *  - 59 → "59s"
+ *  - 60 → "1min 0sec"
+ *  - 75 → "1min 15sec"
+ *
+ * @param elapsedSeconds Non-negative integer seconds elapsed.
+ * @returns Human-readable elapsed-time string.
+ */
+export const formatElapsedTime = (elapsedSeconds: number): string => {
+    if (elapsedSeconds < 60) {
+        return `${elapsedSeconds}s`;
+    }
+
+    const minutes = Math.floor(elapsedSeconds / 60);
+    const seconds = elapsedSeconds % 60;
+    return `${minutes}min ${seconds}sec`;
+};