feat: Add initial Electron frontend package.json with dependencies, scripts, and build configuration.

Frontend/Electron/src/components/Sidebar.jsx

@@ -754,7 +754,8 @@ const Sidebar = ({ channels, categories, activeChannel, onSelectChannel, usernam
                 keyVersion: 1
             });
 
-            const link = `http://localhost:5173/#/register?code=${inviteCode}&key=${inviteSecret}`;
+            const baseUrl = import.meta.env.VITE_APP_URL || window.location.origin;
+            const link = `${baseUrl}/#/register?code=${inviteCode}&key=${inviteSecret}`;
             navigator.clipboard.writeText(link);
             alert(`Invite Link Copied to Clipboard!\n\n${link}`);
         } catch (e) {