Refactor API calls to use apiRequest instead of clientFetch

Replaces all usages of clientFetch with the new apiRequest utility across dashboard pages, modal components, and the profit analytics service. This standardizes API interaction and improves consistency in request handling.

components/modals/broadcast-dialog.tsx

@@ -5,7 +5,7 @@ import { Button } from "@/components/ui/button";
 import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogFooter } from "@/components/ui/dialog";
 import { Send, Bold, Italic, Code, Link as LinkIcon, Image as ImageIcon, X, Eye, EyeOff, Package } from "lucide-react";
 import { toast } from "sonner";
-import { apiRequest } from "@/lib/api";
+import { clientFetch } from "@/lib/api";
 import { Textarea } from "@/components/ui/textarea";
 import ReactMarkdown from 'react-markdown';
 import ProductSelector from "./product-selector";
@@ -137,6 +137,9 @@ export default function BroadcastDialog({ open, setOpen }: BroadcastDialogProps)
             message: broadcastMessage,
             productIds: selectedProducts
           }),
+          headers: {
+            'Content-Type': 'application/json'
+          }
         });
       }