fix(cli): run the bundled generated-ui server in Node mode under Electron (#16064)

* fix(cli): run the bundled generated-ui server in Node mode under Electron

When the CLI is launched by an IDE companion, process.execPath is the
Electron binary, and the ACP launch scrubs ELECTRON_RUN_AS_NODE from the
inherited environment. Spawning the bundled generated-ui MCP server then
started the VS Code GUI, which opened the entry file in an editor.
Pin ELECTRON_RUN_AS_NODE=1 in the server config when running on
Electron; an explicit server env wins over the inherited one.

Fixes #16063

* fix(cli): access process.versions with bracket notation

The repository tsconfig enables noPropertyAccessFromIndexSignature, so
process.versions.electron fails typecheck with TS4111; the generated-ui
server config and its test must read the Electron version as
process.versions['electron'].

Fixes #16063

Co-authored-by: Qwen-Coder <[email protected]>

---------

Co-authored-by: Qwen-Coder <[email protected]>
Co-authored-by: 易良 <[email protected]>

packages/cli/src/config/generated-ui-settings.test.ts

@@ -87,6 +87,26 @@ describe('bundled Generated UI candidate', () => {
     });
   });
 
+  it('forces Node mode when the CLI runs as the Electron binary', () => {
+    const assets = join(fixture, 'generated-ui');
+    populate(assets);
+    const originalElectron = process.versions['electron'];
+    Object.defineProperty(process.versions, 'electron', {
+      value: '43.8.3',
+      configurable: true,
+    });
+    try {
+      expect(prepareBundledGeneratedUi(true, true).server?.env).toEqual({
+        ELECTRON_RUN_AS_NODE: '1',
+      });
+    } finally {
+      Object.defineProperty(process.versions, 'electron', {
+        value: originalElectron,
+        configurable: true,
+      });
+    }
+  });
+
   it.each(files)(
     'withholds an incomplete installation missing %s',
     (missing) => {

packages/cli/src/config/generated-ui-settings.ts

@@ -75,6 +75,13 @@ export function prepareBundledGeneratedUi(
       // Declared up front: the model should see the view as an option when it
       // decides how to answer, not only after searching for deferred tools.
       alwaysLoadTools: true,
+      // When the CLI itself is the Electron binary launched by an IDE
+      // companion, the ACP launch scrubs ELECTRON_RUN_AS_NODE from the
+      // inherited environment (#16063): without it this child starts the
+      // VS Code GUI, which opens the entry file in an editor.
+      ...(process.versions['electron']
+        ? { env: { ELECTRON_RUN_AS_NODE: '1' } }
+        : {}),
     },
   };
 }