feat: update RBI reserve return form 1 & 9 UI and FD accounting mapping

src/app/rbi-circulars/rbi-circulars.service.ts

@@ -121,6 +121,47 @@ export class RbiCircularsService {
     return this.http.get('/ossreturn/oss2', { params: this.ossParams(quarterEndDate, officeId) });
   }
 
+  // ── Saved returns ──
+
+  /**
+   * Returns saved earlier, newest first. A saved return is served from the snapshot taken when it
+   * was saved, never recomputed — a backdated entry or a changed mapping would otherwise produce a
+   * different statement from the one that was reviewed.
+   */
+  getSavedReturns(formCode?: string): Observable<any> {
+    let params = new HttpParams();
+    if (formCode) {
+      params = params.set('formCode', formCode);
+    }
+    return this.http.get('/rbiformafiling', { params });
+  }
+
+  /** One saved return, with the stored snapshot, so the screen renders what was saved. */
+  getSavedReturn(filingId: number): Observable<any> {
+    return this.http.get(`/rbiformafiling/${filingId}`);
+  }
+
+  /** Keeps the return currently on screen. Re-saving the same form and date replaces it. */
+  saveReturn(formCode: string, reportingDate: string, report: any, remarks?: string): Observable<any> {
+    return this.http.post('/rbiformafiling', {
+      formCode,
+      reportingDate,
+      report,
+      remarks,
+      locale: 'en',
+      dateFormat: 'yyyy-MM-dd'
+    });
+  }
+
+  /** Moves a saved return along its filing lifecycle; the snapshot itself is untouched. */
+  updateSavedReturnStatus(filingId: number, status: string, remarks?: string): Observable<any> {
+    return this.http.post(`/rbiformafiling/${filingId}/status`, { status, remarks });
+  }
+
+  deleteSavedReturn(filingId: number): Observable<any> {
+    return this.http.delete(`/rbiformafiling/${filingId}`);
+  }
+
   private ossParams(quarterEndDate?: string, officeId?: number): HttpParams {
     let params = new HttpParams();
     if (quarterEndDate) {