feat: add minimum date constraint to fire calculator date picker

- Set minimum selectable date to tomorrow in fire calculator component
- Added addDays import from date-fns for date calculation
- Added minDate property that calculates tomorrow's date
- Updated mat-datepicker with [min] attribute to enforce constraint
- Ensures users can only select future dates for retirement planning

libs/ui/src/lib/fire-calculator/fire-calculator.component.html

@@ -50,6 +50,7 @@
             #datepicker
             startView="multi-year"
             [disabled]="hasPermissionToUpdateUserSettings !== true"
+            [min]="minDate"
             (monthSelected)="setMonthAndYear($event, datepicker)"
           >
           </mat-datepicker>

libs/ui/src/lib/fire-calculator/fire-calculator.component.ts

@@ -44,6 +44,7 @@ import 'chartjs-adapter-date-fns';
 import Color from 'color';
 import {
   add,
+  addDays,
   addYears,
   getMonth,
   setMonth,
@@ -103,6 +104,7 @@ export class GfFireCalculatorComponent implements OnChanges, OnDestroy {
   public chart: Chart<'bar'>;
   public isLoading = true;
   public periodsToRetire = 0;
+  public minDate = addDays(new Date(), 1); // Tomorrow's date
 
   private readonly CONTRIBUTION_PERIOD = 12;
   private readonly DEFAULT_RETIREMENT_DATE = startOfMonth(