Minor UX updates for IDE mode (#4311)

packages/core/src/services/ideContext.ts

@@ -68,6 +68,14 @@ export function createIdeContextStore() {
     notifySubscribers();
   }
 
+  /**
+   * Clears the active file context and notifies all registered subscribers of the change.
+   */
+  function clearActiveFileContext(): void {
+    activeFileContext = undefined;
+    notifySubscribers();
+  }
+
   /**
    * Retrieves the current active file context.
    * @returns The `ActiveFile` object if a file is active, otherwise `undefined`.
@@ -96,6 +104,7 @@ export function createIdeContextStore() {
     setActiveFileContext,
     getActiveFileContext,
     subscribeToActiveFile,
+    clearActiveFileContext,
   };
 }