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/cashier/branch-day/branch-day.component.scss

@@ -30,6 +30,36 @@
   }
 }
 
+/* Blocks Open Day until the branch's first-ever open has gone through Migrate Cash Denomination —
+   see BranchDayComponent.checkFirstOpenCashMigration(). Same shape as .ve-note, in the error palette
+   the rest of this screen already uses for a missed close (.bd-missed). */
+.bd-locked {
+  display: flex;
+  align-items: flex-start;
+  gap: 8px;
+  padding: 10px 14px;
+  margin-bottom: 14px;
+  background: #fef2f2;
+  border: 1px solid #fecaca;
+  border-radius: 8px;
+  color: #b91c1c;
+  font-size: 12px;
+  line-height: 1.5;
+
+  mat-icon {
+    flex: none;
+    font-size: 18px;
+    width: 18px;
+    height: 18px;
+  }
+
+  a {
+    color: inherit;
+    font-weight: 600;
+    text-decoration: underline;
+  }
+}
+
 .bd-success {
   padding: 10px 14px;
   margin-bottom: 14px;