feat: rename 'fee' to 'unitPrice' across purchase components and models

- Updated form component to use 'unitPrice' instead of 'fee'.
- Adjusted product charge row form fields and templates to reflect the new naming.
- Modified receipt template and related components to utilize 'unitPrice'.
- Changed models and interfaces to replace 'fee' with 'unitPrice'.
- Updated supplier invoice and statistics components to align with the new naming convention.
- Added new API routes for dashboard and statistics modules.

src/app/shared/components/input/input.component.html

@@ -16,6 +16,7 @@
         [required]="isRequired"
         [invalid]="control.invalid && (control.touched || control.dirty)"
         (input)="onInput($event)"
+        (onBlur)="blur.emit()"
       />
       <p-inputgroup-addon>ریال</p-inputgroup-addon>
     </p-inputgroup>
@@ -34,6 +35,7 @@
       [required]="isRequired"
       [invalid]="control.invalid && (control.touched || control.dirty)"
       (input)="onInput($event)"
+      (onBlur)="blur.emit()"
     />
   }
   @if (hint) {

src/app/shared/components/input/input.component.ts

@@ -45,6 +45,7 @@ export class InputComponent {
   @Input() showErrors = false;
   @Input() hint?: string;
   @Output() valueChange = new EventEmitter<string | number>();
+  @Output() blur = new EventEmitter<void>();
 
   onInput(ev: Event) {
     const v = (ev.target as HTMLInputElement).value;