feat: enhance platform dashboard UX and add security controls

- Move Add Company button to Companies card header for better context
- Add smart Save Changes button that only appears when data is modified
- Implement navigation protection with unsaved changes warnings
- Add company status checks to prevent suspended companies from processing data
- Fix platform dashboard showing incorrect user counts
- Add dark mode toggle to platform interface
- Add copy-to-clipboard for generated credentials
- Fix cookie conflicts between regular and platform auth
- Add invitedBy and invitedAt tracking fields to User model
- Improve overall platform management workflow and security

app/api/admin/refresh-sessions/route.ts

@@ -44,6 +44,17 @@ export async function POST(request: NextRequest) {
       return NextResponse.json({ error: "Company not found" }, { status: 404 });
     }
 
+    // Check if company is active and can process data
+    if (company.status !== "ACTIVE") {
+      return NextResponse.json(
+        { 
+          error: `Data processing is disabled for ${company.status.toLowerCase()} companies`,
+          companyStatus: company.status 
+        }, 
+        { status: 403 }
+      );
+    }
+
     const rawSessionData = await fetchAndParseCsv(
       company.csvUrl,
       company.csvUsername as string | undefined,