feat(rbi-reserve,savings): Form 1/Form 9 returns UI, branch-wise interest posting reports and summary

- Reports > Interest Posting Reports: per branch and product, generate/regenerate
  at any time, approve; branch column, HO-on-behalf marker, posted txn per account
- Reports > Interest Posting Summary (branch-wise) for the head office, with Excel export
- Day Close warns and disables Close Day while the branch's interest report is unapproved
- Savings product accounting: Interest On Savings (expense), Savings Interest Payable
  and Paid (liability rows, required)
- RBI Form 1 statutory and Form 9 return screens, reserve config updates
- Interest posting report GETs exempted from the response cache

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/app/board-resolution/bor-report.component.html

@@ -17,7 +17,12 @@
         </p>
       </div>
     </div>
-    <button class="bor-btn bor-btn--xls" type="button" [disabled]="exporting || !filtered.length" (click)="exportExcel()">
+    <button
+      class="bor-btn bor-btn--xls"
+      type="button"
+      [disabled]="exporting || !filtered.length"
+      (click)="exportExcel()"
+    >
       <fa-icon icon="file-excel"></fa-icon>
       {{ exporting ? 'Exporting…' : 'Export' }}
     </button>
@@ -132,7 +137,9 @@
               <td class="num">{{ r.approvedShares | number }}</td>
               <td class="num strong">{{ r.shareValue | number: '1.2-2' }}</td>
               <td class="num">{{ r.trancheCount }}</td>
-              <td><span [class]="statusClass(r.statusEnum)">{{ statusText(r.statusEnum) }}</span></td>
+              <td>
+                <span [class]="statusClass(r.statusEnum)">{{ statusText(r.statusEnum) }}</span>
+              </td>
               <td class="mono">{{ r.activatedDate || '—' }}</td>
             </tr>
           } @empty {