feat(cashier): add Cash/Clearing/Transfer summary report with branch-wise drill-down

Adds a dummy-data summary report (Opening/Credit/Debit/Closing) under Sub
Ledger > Cash / Clearing / Transfer, with Cash, Transfer (GL-wise), Clearing
and Digital (RTGS/NEFT/UPI/ATM/NACH) tabs plus a transaction-details drill
down. Credit/Debit/Closing are always derived from the transaction lines so
the summary and detail views can never drift apart.

Head Office logins (officeId 1 or office name containing "head office") get
a branch switcher across two demo branches plus a consolidated view with a
branch-wise break-up; branch-level logins see only their own office's data.

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

src/app/cashier/cash-clearing-transfer-summary/cash-clearing-transfer-summary.component.scss

@@ -0,0 +1,73 @@
+/**
+ * Copyright since 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+.cctr-tabs {
+  display: flex;
+  gap: 8px;
+  flex-wrap: wrap;
+}
+
+.cctr-total-row {
+  td {
+    background: #f1f5f9;
+    font-weight: 800;
+    border-top: 2px solid #cbd5e1;
+    border-bottom: none;
+    color: #0f172a;
+  }
+}
+
+.cctr-grand-summary {
+  display: flex;
+  background: #fff;
+  border: 1px solid #e2e8f0;
+  border-radius: 12px;
+  overflow: hidden;
+
+  &__item {
+    flex: 1;
+    padding: 14px 20px;
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+    border-right: 1px solid #e2e8f0;
+
+    &:last-child {
+      border-right: none;
+    }
+  }
+
+  &__label {
+    font-size: 10px;
+    font-weight: 700;
+    text-transform: uppercase;
+    letter-spacing: 0.07em;
+    color: #64748b;
+  }
+
+  &__value {
+    font-size: 20px;
+    font-weight: 800;
+    font-variant-numeric: tabular-nums;
+    color: #0f172a;
+  }
+}
+
+.cctr-subtext {
+  font-size: 11px;
+  color: #94a3b8;
+  margin-top: 2px;
+}
+
+.cctr-branch-row {
+  cursor: pointer;
+
+  &:hover td {
+    background: #eff6ff;
+  }
+}