fix: clean up /clear and /resume (#22007)

packages/cli/src/ui/contexts/SessionContext.tsx

@@ -216,7 +216,17 @@ export const SessionStatsProvider: React.FC<{ children: React.ReactNode }> = ({
       });
     };
 
+    const handleClear = (newSessionId?: string) => {
+      setStats((prevState) => ({
+        ...prevState,
+        sessionId: newSessionId || prevState.sessionId,
+        sessionStartTime: new Date(),
+        promptCount: 0,
+      }));
+    };
+
     uiTelemetryService.on('update', handleUpdate);
+    uiTelemetryService.on('clear', handleClear);
     // Set initial state
     handleUpdate({
       metrics: uiTelemetryService.getMetrics(),
@@ -225,6 +235,7 @@ export const SessionStatsProvider: React.FC<{ children: React.ReactNode }> = ({
 
     return () => {
       uiTelemetryService.off('update', handleUpdate);
+      uiTelemetryService.off('clear', handleClear);
     };
   }, []);