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

lib/processingStatusManager.ts

@@ -172,6 +172,11 @@ export class ProcessingStatusManager {
       where: {
         stage,
         status: ProcessingStatus.PENDING,
+        session: {
+          company: {
+            status: "ACTIVE" // Only process sessions from active companies
+          }
+        }
       },
       include: {
         session: {