New apps Added

custom_components/maintenance_supporter/frontend-src/web-test-runner.config.mjs

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+/**
+ * Lit-component test runner for the panel UI.
+ *
+ * Runs in real Chromium (headless) but mounts components in isolation
+ * with mocked hass — no HA shell, no shadow-DOM-deep-piercing nightmares.
+ * Each test is ~10-50ms, the whole suite runs in seconds.
+ *
+ *   npm test              — one-shot
+ *   npm run test:watch    — watch mode
+ */
+
+import { esbuildPlugin } from "@web/dev-server-esbuild";
+import { playwrightLauncher } from "@web/test-runner-playwright";
+import { defaultReporter, summaryReporter } from "@web/test-runner";
+
+export default {
+  files: "__tests__/**/*.test.ts",
+  nodeResolve: true,
+  plugins: [
+    esbuildPlugin({
+      ts: true,
+      json: true,
+      target: "es2020",
+      tsconfig: "./tsconfig.json",
+    }),
+  ],
+  browsers: [
+    playwrightLauncher({
+      product: "chromium",
+      // Channel-less; uses bundled chromium from playwright cache.
+    }),
+  ],
+  testFramework: {
+    config: { ui: "bdd", timeout: "5000" },
+  },
+  coverage: false,
+  reporters: [
+    summaryReporter(),
+    defaultReporter({ reportTestResults: true, reportTestProgress: true }),
+  ],
+};