fix: tenant-config fixes, cashier/share/savings UI bugs, and menu-access hardcoding

- Add Balance Sheet report and disabled-features accounting config
- Point menu-access tenant header and env.js/environment.ts tenant identifier
  at env config instead of hardcoded 'default'/'lincpay' literals
- Surface the real backend error (not a generic "no reference id") when an
  OTP send fails in contact-otp-block
- Fix branch-day "₹null" display bug (null vs undefined) and add a guard
  blocking a branch's first-ever day open before cash denomination migration
- Dynamically size the denomination count input and block re-opening an
  already-open business day from Migrate Cash Denomination
- Lock the denomination-managed cash GL row in Migrate Opening Balances
  (read-only, with a link back to Migrate Cash Denomination)
- Remove duplicate Cancel/Submit action bars on the Share Product and
  Savings Account creation preview steps; align Previous into the same row
- Hide "Apply Collection" on a share account once its advance collection
  is already settled (further purchases go through Apply Additional Shares)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/accounting/accounting.component.ts

@@ -18,6 +18,7 @@ import { MatIcon } from '@angular/material/icon';
 import { FaIconComponent } from '@fortawesome/angular-fontawesome';
 import { MatLine } from '@angular/material/grid-list';
 import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
+import { DISABLED_ACCOUNTING_FEATURES } from './disabled-features';
 
 /**
  * Accounting component.
@@ -63,6 +64,9 @@ export class AccountingComponent implements AfterViewInit {
   // Initialize an array of 10 boolean values, all set to false
   arrowBooleans: boolean[] = new Array(10).fill(false);
 
+  /** Which accounting tiles are switched off for this installation — see disabled-features.ts. */
+  disabledFeatures = DISABLED_ACCOUNTING_FEATURES;
+
   /**
    * Popover function
    * @param template TemplateRef<any>.
@@ -104,12 +108,15 @@ export class AccountingComponent implements AfterViewInit {
         );
       });
     }
-    if (this.configurationWizardService.showClosingEntries) {
+    // Closing Entries and Create Journal Entries can be switched off (see disabled-features.ts), in
+    // which case their tiles never render and these refs stay undefined — the wizard simply has no
+    // step to point at, rather than throwing on a missing element.
+    if (this.configurationWizardService.showClosingEntries && this.closingEntries) {
       setTimeout(() => {
         this.showPopover(this.templateClosingEntries, this.closingEntries.nativeElement, 'bottom', true);
       });
     }
-    if (this.configurationWizardService.showCreateJournalEntries) {
+    if (this.configurationWizardService.showCreateJournalEntries && this.createJournalEntries) {
       setTimeout(() => {
         this.showPopover(this.templateCreateJournalEntries, this.createJournalEntries.nativeElement, 'bottom', true);
       });