improvement: loading state added to buttons who interact with backend.

frontend/src/components/ui/treatment/LabCasesDispatchPanel.tsx

@@ -45,8 +45,8 @@ interface LabCasesDispatchPanelProps {
   canInviteLab?: boolean;
   onInviteLab?: () => void;
   sendBusyId: string | null;
-  onAddLabCase: () => void;
-  onSendLabCase: (labCase: LabCaseDraft, comment?: string) => void;
+  onAddLabCase: () => void | Promise<void>;
+  onSendLabCase: (labCase: LabCaseDraft, comment?: string) => void | Promise<void>;
   onCommentError?: (message: string) => void;
 }
 

frontend/src/components/ui/treatment/TreatmentWorkspace.tsx

@@ -2054,8 +2054,8 @@ export function TreatmentWorkspace({
                     });
                   }}
                   sendBusyId={sendBusyId}
-                  onAddLabCase={() => void handleAddLabCase()}
-                  onSendLabCase={(lc, comment) => void handleSendLabCase(lc, comment)}
+                  onAddLabCase={() => handleAddLabCase()}
+                  onSendLabCase={(lc, comment) => handleSendLabCase(lc, comment)}
                   onCommentError={showError}
                   canInviteLab={canAccessOrganizations}
                   onInviteLab={() => router.push('/organizations?action=invite-lab')}