feat(cli): add minimal Core Web profile

apps/web/tests/scaffold.ts

@@ -100,6 +100,12 @@ export interface WebScaffold {
 
 /** Options for {@link launchWebScaffold}. */
 export interface LaunchOptions {
+  /**
+   * Optional product overlay applied after the shipped Web surface and before
+   * the scaffold's hermetic test patches, matching AppCLIEntry's `--config`
+   * ordering.
+   */
+  extraOverlayPath?: string
   /**
    * Replay fixture (session.jsonl) served by the inserted dsh-llm-replay row
    * in replay/refresh modes; ignored in record mode (the real adapter
@@ -196,8 +202,12 @@ export async function launchWebScaffold(options: LaunchOptions = {}): Promise<We
   // snapshot overlay use, applied over the SAME shipped tree (a patch id that
   // stops matching a row fails the boot sweep loudly instead of drifting).
   const surfacePatches = loadOverlayPatches('web e2e scaffold', WEB_OVERLAY_PATH)
+  const extraOverlayPatches = options.extraOverlayPath === undefined
+    ? []
+    : loadOverlayPatches('web e2e scaffold', options.extraOverlayPath)
   const patches: PatchOptions[] = [
     ...surfacePatches,
+    ...extraOverlayPatches,
     { id: 'session-persistence-jsonl', config: { root: persistenceRoot } },
     { id: 'session-query-sqlite', config: { path: ':memory:', openAt: 'first-search' } },
     // storage-json's './.storages' yml default is cwd-relative and resolves