fix(letter-mgmt): make share certificate bank identity dynamic and fix broken printing

- Certificate PDFs, the preview dialog, and both share-certificate list views
  (demo + live) now pull bank name/address/reg no/seal text from the
  Institution Profile instead of a hardcoded "Nexora" identity.
- Certificate preview dialog print CSS was clipped to the dialog's on-screen
  scroll viewport (maxHeight config); switched to position:fixed + unclipped
  overlay ancestors so the full certificate prints, not just a border sliver.
- Global print stylesheet now also hides the app shell's real 2-row nav menu
  (.main-header/.kpi-ticker, not routed through <mifosx-toolbar>) and frees
  the CDK sidenav/tab-body scroll clipping, so printing any page no longer
  captures the nav chrome or gets cut off to one screen's height.

src/app/letter-mgmt/certificates/share-certificate/share-certificate.component.ts

@@ -19,8 +19,9 @@ import {
   CertificatePreviewDialogComponent,
   CertificatePreviewDialogData
 } from '../certificate-preview-dialog/certificate-preview-dialog.component';
-import { downloadShareCertificatePdf } from '../certificate-pdf';
+import { downloadShareCertificatePdf, setBankIdentity } from '../certificate-pdf';
 import { DscSignService } from '../../dsc-sign-dialog/dsc-sign.service';
+import { OrganizationService } from '../../../organization/organization.service';
 import { RealShareAccountsViewComponent } from './real-share-accounts-view/real-share-accounts-view.component';
 
 export type ShareClass = 'ORDINARY' | 'PREFERENCE';
@@ -62,6 +63,7 @@ export class ShareCertificateComponent implements OnInit {
   private dialog = inject(MatDialog);
   private snack = inject(MatSnackBar);
   private dscSign = inject(DscSignService);
+  private organizationService = inject(OrganizationService);
 
   /** Toggles between the static sample table and the live m_share_account view. */
   viewMode: 'demo' | 'real' = 'demo';
@@ -80,6 +82,13 @@ export class ShareCertificateComponent implements OnInit {
 
   ngOnInit(): void {
     this.records = seedShareCertificates();
+
+    // Download here builds the PDF directly, without necessarily opening the preview dialog first,
+    // so this list must set the shared bank identity itself.
+    this.organizationService.getInstitutionProfile().subscribe({
+      next: (profile: any) => setBankIdentity(profile || {}),
+      error: () => {}
+    });
   }
 
   // ── Derived list ──