fix(i18n): route dirty-guard and html-editor strings through TranslateService

window.confirm/window.prompt calls in projectEditorDirtyGuard and
MarketplaceHtmlEditorComponent, and the hardcoded Preview/Code toggle
label in its template, bypassed the app's translation pipeline. Add
builder.confirmLeaveUnsaved, promptLinkUrl, promptImageUrl,
htmlEditorCode and htmlEditorPreview keys (en/ru/hy), resolve them via
TranslateService.t() before passing to confirm/prompt, and use
TranslatePipe for the toggle button label.

src/app/features/project-editor/components/html-editor/marketplace-html-editor.component.html

@@ -3,7 +3,7 @@
     @for (item of toolbar; track item.id) {
       <button type="button" (click)="runCommand(item)">{{ item.label }}</button>
     }
-    <button type="button" (click)="toggleCode()">{{ showCode() ? 'Preview' : 'Code' }}</button>
+    <button type="button" (click)="toggleCode()">{{ (showCode() ? 'builder.htmlEditorPreview' : 'builder.htmlEditorCode') | translate }}</button>
   </div>
 
   <textarea

src/app/features/project-editor/components/html-editor/marketplace-html-editor.component.ts

@@ -1,4 +1,6 @@
-import { AfterViewInit, ChangeDetectionStrategy, Component, ElementRef, EventEmitter, Input, OnChanges, Output, SimpleChanges, ViewChild, signal } from '@angular/core';
+import { AfterViewInit, ChangeDetectionStrategy, Component, ElementRef, EventEmitter, Input, OnChanges, Output, SimpleChanges, ViewChild, inject, signal } from '@angular/core';
+import { TranslateService } from '../../../../i18n/translate.service';
+import { TranslatePipe } from '../../../../i18n/translate.pipe';
 
 export interface HtmlEditorToolbarCommand {
   id: string;
@@ -23,12 +25,14 @@ export const HTML_EDITOR_TOOLBAR: HtmlEditorToolbarCommand[] = [
 @Component({
   selector: 'app-marketplace-html-editor',
   standalone: true,
-  imports: [],
+  imports: [TranslatePipe],
   templateUrl: './marketplace-html-editor.component.html',
   styleUrls: ['./marketplace-html-editor.component.scss'],
   changeDetection: ChangeDetectionStrategy.OnPush
 })
 export class MarketplaceHtmlEditorComponent implements OnChanges, AfterViewInit {
+  private readonly translate = inject(TranslateService);
+
   @Input() html = '';
   @Output() htmlChange = new EventEmitter<string>();
   @ViewChild('surface', { static: true }) surface!: ElementRef<HTMLDivElement>;
@@ -58,13 +62,13 @@ export class MarketplaceHtmlEditorComponent implements OnChanges, AfterViewInit
   runCommand(item: HtmlEditorToolbarCommand): void {
     this.surface.nativeElement.focus();
     if (item.command === 'createLink') {
-      const url = window.prompt('URL');
+      const url = window.prompt(this.translate.t('builder.promptLinkUrl'));
       if (!url) {
         return;
       }
       document.execCommand('createLink', false, url);
     } else if (item.command === 'insertImage') {
-      const url = window.prompt('Image URL');
+      const url = window.prompt(this.translate.t('builder.promptImageUrl'));
       if (!url) {
         return;
       }

src/app/features/project-editor/guards/project-editor-dirty.guard.ts

@@ -2,11 +2,13 @@ import { inject } from '@angular/core';
 import { CanDeactivateFn } from '@angular/router';
 import { ProjectEditorFacade } from '../facade/project-editor.facade';
 import { ProjectEditorPageComponent } from '../pages/project-editor-page.component';
+import { TranslateService } from '../../../i18n/translate.service';
 
 export const projectEditorDirtyGuard: CanDeactivateFn<ProjectEditorPageComponent> = () => {
   const facade = inject(ProjectEditorFacade);
   if (!facade.dirty()) {
     return true;
   }
-  return window.confirm('You have unsaved changes. Leave anyway?');
+  const translate = inject(TranslateService);
+  return window.confirm(translate.t('builder.confirmLeaveUnsaved'));
 };