Fixed conversation creation RLS

X-Lovable-Edit-ID: edt-6ec5edf2-d491-40a6-a968-ce92ffa730cb
Co-authored-by: renee-png <262607627+renee-png@users.noreply.github.com>

src/routes/messages.index.tsx

@@ -298,14 +298,13 @@ function NewConversationDialog({ profiles, onCreated }: { profiles: Profile[]; o
     }
     setBusy(true);
     try {
-      const { data: conv, error } = await supabase
+      const convId = crypto.randomUUID();
+      const { error } = await supabase
         .from("conversations")
-        .insert({ type, name: type === "channel" ? name.trim() : null, created_by: user.id })
-        .select("id")
-        .single();
-      if (error || !conv) throw error;
+        .insert({ id: convId, type, name: type === "channel" ? name.trim() : null, created_by: user.id });
+      if (error) throw error;
       const memberRows = [user.id, ...Array.from(selected)].map((uid) => ({
-        conversation_id: conv.id,
+        conversation_id: convId,
         user_id: uid,
       }));
       const { error: mErr } = await supabase.from("conversation_members").insert(memberRows);
@@ -313,7 +312,7 @@ function NewConversationDialog({ profiles, onCreated }: { profiles: Profile[]; o
       toast.success("Conversation created");
       setOpen(false);
       reset();
-      onCreated(conv.id);
+      onCreated(convId);
     } catch (e: any) {
       toast.error(e.message || "Failed to create conversation");
     } finally {