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/main.scss

@@ -978,9 +978,18 @@ mat-card {
   mifosx-breadcrumb,
   mifosx-footer,
   .sidebar-panel,
+  .sidebar-handle,
   .mat-mdc-tab-header,
   .mat-stepper-vertical-line,
-  .mat-step-header {
+  .mat-step-header,
+  /* The real 2-row nav menu (Client Master / Approvals / Cashier … and the row below it) and the
+     live KPI ticker live directly in shell.component.html as .main-header / .kpi-ticker, not
+     inside <mifosx-toolbar> — hiding only the toolbar left this menu printing on every page. */
+  .main-header,
+  .kpi-ticker,
+  .cashier-nav,
+  .gl-backdrop,
+  .gl-mega-menu {
     display: none !important;
   }
 
@@ -988,6 +997,32 @@ mat-card {
     margin-left: 0 !important;
   }
 
+  /* The whole app shell scrolls inside CDK's own clipped viewport —
+     .mat-drawer-container { overflow: hidden } and .mat-drawer-content { overflow: auto; height: 100% }
+     — so without freeing these too, print is still capped to one screen's worth of the page
+     regardless of the tab-body fix below. */
+  #mifosx-shell-container,
+  .mat-drawer-container,
+  .mat-drawer-content,
+  mat-sidenav-content.sidenav {
+    position: static !important;
+    overflow: visible !important;
+    height: auto !important;
+  }
+
+  /* Angular Material clips a tab's content to a JS-measured on-screen height via
+     `.mat-mdc-tab-body-wrapper { overflow: hidden }` (for the tab-switch height animation) and
+     `.mat-mdc-tab-body-content { height: 100%; overflow: auto }` — printing only what fit that
+     clip left every account/tab page (Shares Account General included) blank apart from a
+     stray border. Printing needs the full content, not the animated viewport. */
+  .mat-mdc-tab-body-wrapper,
+  .mat-mdc-tab-body,
+  .mat-mdc-tab-body-content {
+    position: static !important;
+    overflow: visible !important;
+    height: auto !important;
+  }
+
   body,
   html {
     background: #fff !important;