Suppress the webview's default right-click menu

Reload/Inspect Element no longer appear on uncontrolled right-clicks
in any window; text fields keep the system text menu.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ui/src/app/editor-window/editor-window.ts

@@ -10,7 +10,7 @@ import {
   viewChild,
 } from '@angular/core';
 import { NgIcon } from '@ng-icons/core';
-import { EDITOR_CONTEXT, IS_MAC_CHROME } from '../platform';
+import { blockNativeContextMenu, EDITOR_CONTEXT, IS_MAC_CHROME } from '../platform';
 import { RpcService } from '../rpc.service';
 import { SettingsService } from '../settings.service';
 import { ToastService } from '../toast.service';
@@ -31,7 +31,11 @@ const DRAFT_DEBOUNCE_MS = 400;
   selector: 'app-root',
   imports: [NgIcon, Toasts],
   templateUrl: './editor-window.html',
-  host: { '(window:keydown)': 'onKeydown($event)', '(window:blur)': 'flushDraft()' },
+  host: {
+    '(window:keydown)': 'onKeydown($event)',
+    '(window:blur)': 'flushDraft()',
+    '(window:contextmenu)': 'blockContextMenu($event)',
+  },
 })
 export class EditorWindow {
   readonly ctx = EDITOR_CONTEXT;
@@ -126,6 +130,10 @@ export class EditorWindow {
     queueMicrotask(() => this.box()?.nativeElement.focus());
   }
 
+  blockContextMenu(event: Event): void {
+    blockNativeContextMenu(event);
+  }
+
   onInput(value: string): void {
     this.text.set(value);
     this.scheduleDraft();