Tweak modules to be disabled if config is missing (#33806)

* Consolidate modules vitest coverage

* Use vite-common as base for modules vitest config

* Make knip happier

* Fix coverage paths

* Place modules unit tests alongside src

* Switch to defineProject for better type safety

* Consolidate vitest CI & coverage

Kills off vite-common

* Update comment

* Update lockfile

* Fix shared-components vitest config

* Soften eslint config for tests in modules

* Run eslint on modules/playwright dir too

* Make tsc happy

* Tweak modules to be disabled if config is missing

* Restore blank line

* Improve coverage

* Potential fix for pull request finding 'Unused variable, import, function or class'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

---------

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

modules/banner/src/config.ts

@@ -115,6 +115,6 @@ export const CONFIG_KEY = "io.element.element-web-modules.banner";
 
 declare module "@element-hq/element-web-module-api" {
     export interface Config {
-        [CONFIG_KEY]: input<ConfigSchema>;
+        [CONFIG_KEY]?: input<ConfigSchema>;
     }
 }

modules/banner/src/index.test.ts

@@ -0,0 +1,35 @@
+/*
+Copyright 2026 Element Creations Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE files in the repository root for full details.
+*/
+
+import { describe, expect, it, vi } from "vitest";
+import { type Api } from "@element-hq/element-web-module-api";
+
+import BannerModule from "./index";
+
+const makeApi = (config: unknown): Api => {
+    return {
+        config: {
+            get: vi.fn().mockReturnValue(config),
+        },
+        i18n: {
+            register: vi.fn(),
+        },
+    } as unknown as Api;
+};
+
+describe("BannerModule", () => {
+    describe("load", () => {
+        it("should do nothing if no config present", async () => {
+            const api = makeApi(null);
+
+            const module = new BannerModule(api);
+            await module.load();
+
+            expect(api.i18n.register).not.toHaveBeenCalled();
+        });
+    });
+});

modules/banner/src/index.tsx

@@ -23,13 +23,19 @@ class BannerModule implements Module {
     public constructor(private api: Api) {}
 
     public async load(): Promise<void> {
+        const rawConfig = this.api.config.get(CONFIG_KEY);
+        if (!rawConfig) {
+            console.debug(`No configuration found for module "${ModuleName}", skipping initialization.`);
+            return;
+        }
+
         document.adoptedStyleSheets.push(compound);
         document.adoptedStyleSheets.push(style);
 
         this.api.i18n.register(Translations);
 
         try {
-            this.config = ModuleConfig.parse(this.api.config.get(CONFIG_KEY));
+            this.config = ModuleConfig.parse(rawConfig);
         } catch (e) {
             console.error("Failed to init module", e);
             throw new Error(`Errors in module configuration for "${ModuleName}"`);