feat: senior citizen rate fix, joint ownership cap, FD/RD UI improvements

- Senior citizen interest rate correctly sent in FD/RD create payload
  (isSeniorCitizen, seniorCitizenInterestRate, nominalAnnualInterestRate override)
- Joint account ownership capped at 100%: Add Holder/Partner button disabled
  when 100% reached; dialog enforces remaining share as max across all account types
- FD/RD interest rate chart step: rate calculator with tenure, senior citizen toggle,
  maturity preview
- FD/RD preview step improvements
- Base FD interest rate chart component added under fixed-deposit-products
- Base recurring deposit interest rate chart component removed (replaced)
- Savings account details step: joint holder improvements
- Products routing and module updated for base FD rate chart

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/current-accounts/current-account-stepper/current-account-details-step/add-related-client-dialog/add-related-client-dialog.component.html

@@ -106,20 +106,38 @@
     <div class="arc-step-label arc-step-label--mt">
       <span class="arc-step-badge">2</span>
       <span>Ownership Share</span>
+      @if (maxShare < 100) {
+        <span class="arc-remaining-badge">Max available: {{ maxShare }}%</span>
+      }
     </div>
 
     <div class="arc-share-row">
       <mat-form-field appearance="outline" class="arc-share-field">
         <mat-label>Share Percentage</mat-label>
-        <input matInput type="number" formControlName="sharePercentage" min="1" max="100" />
+        <input matInput type="number" formControlName="sharePercentage" min="1" [max]="maxShare" />
         <span matSuffix class="arc-percent-suffix">%</span>
-        <mat-error>Enter a value between 1 and 100</mat-error>
+        @if (form.get('sharePercentage').hasError('max')) {
+          <mat-error>Maximum available is {{ maxShare }}%</mat-error>
+        } @else {
+          <mat-error>Enter a value between 1 and {{ maxShare }}</mat-error>
+        }
       </mat-form-field>
 
       <div class="arc-share-hints">
         @for (hint of [25, 33, 50, 100]; track hint) {
-          <button type="button" class="arc-hint-chip" (click)="form.get('sharePercentage').setValue(hint)">
-            {{ hint }}%
+          @if (hint <= maxShare) {
+            <button type="button" class="arc-hint-chip" (click)="form.get('sharePercentage').setValue(hint)">
+              {{ hint }}%
+            </button>
+          }
+        }
+        @if (maxShare > 0 && ![25, 33, 50, 100].includes(maxShare)) {
+          <button
+            type="button"
+            class="arc-hint-chip arc-hint-chip--remaining"
+            (click)="form.get('sharePercentage').setValue(maxShare)"
+          >
+            {{ maxShare }}%
           </button>
         }
       </div>

src/app/current-accounts/current-account-stepper/current-account-details-step/add-related-client-dialog/add-related-client-dialog.component.scss

@@ -102,6 +102,19 @@ mifosx-add-related-client-dialog {
   }
 }
 
+.arc-remaining-badge {
+  margin-left: auto;
+  font-size: 11px;
+  font-weight: 700;
+  padding: 2px 10px;
+  border-radius: 999px;
+  background: #fef3c7;
+  color: #92400e;
+  border: 1px solid #fcd34d;
+  text-transform: none;
+  letter-spacing: 0;
+}
+
 .arc-step-badge {
   width: 20px;
   height: 20px;
@@ -350,6 +363,18 @@ mifosx-add-related-client-dialog {
     background: $primary-light;
     color: $primary;
   }
+
+  &--remaining {
+    border-color: #f59e0b;
+    background: #fffbeb;
+    color: #92400e;
+
+    &:hover {
+      border-color: #d97706;
+      background: #fef3c7;
+      color: #78350f;
+    }
+  }
 }
 
 // ── Actions ───────────────────────────────────────────────────────────────────

src/app/current-accounts/current-account-stepper/current-account-details-step/add-related-client-dialog/add-related-client-dialog.component.ts

@@ -32,16 +32,21 @@ export class AddRelatedClientDialogComponent implements OnDestroy {
   private fb = inject(UntypedFormBuilder);
   private clientsService = inject(ClientsService);
   dialogRef = inject(MatDialogRef<AddRelatedClientDialogComponent>);
-  data: { excludedClientIds?: number[] } = inject(MAT_DIALOG_DATA, { optional: true }) ?? {};
+  data: { excludedClientIds?: number[]; maxSharePercentage?: number } =
+    inject(MAT_DIALOG_DATA, { optional: true }) ?? {};
+
+  get maxShare(): number {
+    return this.data?.maxSharePercentage ?? 100;
+  }
 
   form: UntypedFormGroup = this.fb.group({
     searchText: [''],
     sharePercentage: [
-      null,
+      this.data?.maxSharePercentage ?? null,
       [
         Validators.required,
         Validators.min(1),
-        Validators.max(100)
+        Validators.max(this.data?.maxSharePercentage ?? 100)
       ]
     ],
     signingAuthority: [null],

src/app/current-accounts/current-account-stepper/current-account-details-step/current-account-details-step.component.html

@@ -259,6 +259,7 @@
               color="primary"
               type="button"
               class="soa-add-btn"
+              [disabled]="totalJointSharePercentage >= 100"
               (click)="openAddJointHolderDialog()"
             >
               <mat-icon>person_add</mat-icon> Add Holder
@@ -761,6 +762,7 @@
             color="primary"
             type="button"
             class="ni-add-btn"
+            [disabled]="totalSharePercentage >= 100"
             (click)="openAddRelatedClientDialog()"
           >
             <mat-icon>person_add</mat-icon> Add Partner

src/app/current-accounts/current-account-stepper/current-account-details-step/current-account-details-step.component.ts

@@ -364,11 +364,12 @@ export class CurrentAccountDetailsStepComponent implements OnInit {
       ...(this.primaryClientId ? [this.primaryClientId] : []),
       ...this.jointHolders.map((h: any) => h.clientId).filter(Boolean)
     ];
+    const maxSharePercentage = Math.max(0, 100 - this.totalJointSharePercentage);
     const ref = this.dialog.open(AddRelatedClientDialogComponent, {
       width: '500px',
       panelClass: 'arc-dialog-panel',
       disableClose: true,
-      data: { excludedClientIds }
+      data: { excludedClientIds, maxSharePercentage }
     });
     ref.afterClosed().subscribe((result) => {
       if (result) {
@@ -443,11 +444,12 @@ export class CurrentAccountDetailsStepComponent implements OnInit {
       ...(this.primaryClientId ? [this.primaryClientId] : []),
       ...this.relatedClients.map((c: any) => c.clientId).filter(Boolean)
     ];
+    const maxSharePercentage = Math.max(0, 100 - this.totalSharePercentage);
     const ref = this.dialog.open(AddRelatedClientDialogComponent, {
       width: '500px',
       panelClass: 'arc-dialog-panel',
       disableClose: true,
-      data: { excludedClientIds }
+      data: { excludedClientIds, maxSharePercentage }
     });
     ref.afterClosed().subscribe((result) => {
       if (result) {