test: use real environment values in unit test mocks

Author: amanabiy

vite.config.unit.mjs

@@ -2,7 +2,10 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import process from "node:process";
+
 import { defineConfig } from "vite";
+
+import getPackageVersion from "./scripts/environment.js";
 import base from "./vite.config.mjs";
 
 // https://vitejs.dev/config/
@@ -25,12 +28,11 @@ export default defineConfig({
       },
       load(id) {
         if (id === "/virtual:environment-mock") {
-          // Simple stub - the actual values are mocked when testing
           return `
-            export const THEME = "stub";
-            export const PACKAGE_SOURCE = "stub";
-            export const PACKAGE_VERSION = "stub";
-            export const SYSTEM = "stub";
+            export const PACKAGE_SOURCE = "chat-components";
+            export const PACKAGE_VERSION = "${getPackageVersion()}";
+            export const THEME = "open-source-visual-refresh";
+            export const SYSTEM = "core";
             export const ALWAYS_VISUAL_REFRESH = true;
           `;
         }