fix: integrate AI preferencex context key

The ai-core package offers a preference context key, which can be used
in scenarios like 'when' clauses for menus. This key was not integrated,
leading to the deactivation of all dependent features. This is now fixed.

packages/ai-core/src/browser/ai-activation-service.ts

@@ -19,7 +19,11 @@ import { Emitter, MaybePromise, Event, } from '@theia/core';
 import { ContextKeyService, ContextKey } from '@theia/core/lib/browser/context-key-service';
 import { PREFERENCE_NAME_ENABLE_EXPERIMENTAL } from './ai-core-preferences';
 
-export const EXPERIMENTAL_AI_CONTEXT_KEY = 'ai.experimental.enabled';
+/**
+ * Context key for the experimental AI feature. It is set to `true` if the feature is enabled.
+ */
+// We reuse the enablement preference for the context key
+export const EXPERIMENTAL_AI_CONTEXT_KEY = PREFERENCE_NAME_ENABLE_EXPERIMENTAL;
 
 @injectable()
 export class AIActivationService implements FrontendApplicationContribution {
@@ -41,7 +45,7 @@ export class AIActivationService implements FrontendApplicationContribution {
     }
 
     initialize(): MaybePromise<void> {
-        this.isExperimentalEnabledKey = this.contextKeyService.createKey(PREFERENCE_NAME_ENABLE_EXPERIMENTAL, false);
+        this.isExperimentalEnabledKey = this.contextKeyService.createKey(EXPERIMENTAL_AI_CONTEXT_KEY, false);
         this.preferenceService.onPreferenceChanged(e => {
             if (e.preferenceName === PREFERENCE_NAME_ENABLE_EXPERIMENTAL) {
                 this.isExperimentalEnabledKey.set(e.newValue);