feat(layout): enhance topbar with customizable templates and full-page support

- Updated app.layout.component.html to include start, center, and end templates for the topbar.
- Modified app.layout.component.ts to manage new template references and added isFullPage getter.
- Refactored app.topbar.component.html to utilize new templates and improved layout structure.
- Enhanced app.topbar.component.ts to accept new input properties for templates.
- Updated layout.service.ts to manage full-page state and new topbar slots.
- Added new payment bridge services for POS functionality.
- Introduced greater validator for form validation.
- Improved dialog component to support mobile drawer and responsive design.
- Updated styles for better mobile support and layout adjustments.
- Added new main menu sidebar for POS with dynamic content.

src/app/core/validators/greater.validator.ts

@@ -0,0 +1,25 @@
+import { AbstractControl, ValidationErrors, ValidatorFn } from '@angular/forms';
+
+/**
+ * Strictly checks numeric value is greater than `minValue` (not equal).
+ * Empty values are treated as valid; combine with `Validators.required` when needed.
+ */
+export function greaterThanValidator(minValue: number): ValidatorFn {
+  return (control: AbstractControl): ValidationErrors | null => {
+    const v = control.value;
+    if (v === null || v === undefined || v === '') {
+      return null;
+    }
+
+    const numericValue = typeof v === 'number' ? v : Number(v);
+    if (Number.isNaN(numericValue)) {
+      return { greaterThan: 'مقدار باید عددی باشد' };
+    }
+
+    return numericValue > minValue
+      ? null
+      : {
+          greaterThan: `مقدار باید بیشتر از ${minValue} باشد`,
+        };
+  };
+}

src/app/core/validators/index.ts

@@ -1,4 +1,5 @@
 export * from './fiscal-code.validator';
+export * from './greater.validator';
 export * from './iban.validator';
 export * from './mobile.validator';
 export * from './must-match.validator';