diff --git a/develop/setup/Makefile b/develop/setup/Makefile
index 45d710f0a7..6928108bc5 100644
--- a/develop/setup/Makefile
+++ b/develop/setup/Makefile
@@ -18,11 +18,6 @@ WEBAPPS_FLAGS :=
 #   PRODUCT_VERSION=9.4.0 make web-apps-dev
 PRODUCT_VERSION ?= $(shell cat $(EO_DEV)/VERSION)
 
-# Pass SKIP_MOBILE=1 to skip framework7-react mobile builds (~50s saved).
-# Useful when iterating on desktop editor JS/CSS only.
-#   SKIP_MOBILE=1 make web-apps-dev
-SKIP_MOBILE ?= 0
-
 CHECK_WEBAPPS_DEPS = @test -d $(EO_DEV)/web-apps/build/node_modules || { echo "Run 'make web-apps' first to install dependencies"; exit 1; }
 
 # Dev-friendly cache flush: regenerate nginx cache tag and reload, without
@@ -62,7 +57,6 @@ web-apps:
 	cd $(EO_DEV)/web-apps/build && \
 	npm ci && \
 	BUILD_ROOT=$(EO_ROOT) PRODUCT_VERSION=$(PRODUCT_VERSION) THEME=euro-office \
-	SKIP_MOBILE=$(SKIP_MOBILE) \
 	node scripts/build-pipeline.js
 	$(FLUSH_CACHE)
 
@@ -72,7 +66,6 @@ web-apps-dev:
 	python3 merge_and_check.py && \
 	cd $(EO_DEV)/web-apps/build && \
 	BUILD_ROOT=$(EO_ROOT) PRODUCT_VERSION=$(PRODUCT_VERSION) THEME=euro-office \
-	SKIP_MOBILE=$(SKIP_MOBILE) \
 	node scripts/build-pipeline.js
 	$(FLUSH_CACHE)
 
diff --git a/e2e/tests/mobile-editor.spec.ts b/e2e/tests/mobile-editor.spec.ts
new file mode 100644
index 0000000000..f0625ea501
--- /dev/null
+++ b/e2e/tests/mobile-editor.spec.ts
@@ -0,0 +1,45 @@
+import { test, expect } from '@playwright/test';
+
+// Canvas id differs by engine: doc/presentation/pdf use #id_viewer, spreadsheet #ws-canvas.
+// Visio excluded: create-new has no blank vsdx template (fileExt=vsdx 500s). The build-time
+// verify-deploy.mjs check still gates the visio mobile bundle.
+const MOBILE_EDITOR_TYPES = [
+  { label: 'Document',     fileExt: 'docx', canvasSelector: '#id_viewer' },
+  { label: 'Spreadsheet',  fileExt: 'xlsx', canvasSelector: '#ws-canvas' },
+  { label: 'Presentation', fileExt: 'pptx', canvasSelector: '#id_viewer' },
+  { label: 'PDF form',     fileExt: 'pdf',  canvasSelector: '#id_viewer' },
+] as const;
+
+// Fatal errors surface as an f7 dialog or, for LoadingScriptError, a notification — check both.
+// See apps/*/mobile/src/controller/Error.jsx.
+const ERROR_SURFACE_SELECTOR = '.dialog.modal-in, .notification.modal-in';
+
+// Remit: verify the mobile build is present and actually renders a document (the #258 class of
+// failure). Infra faults such as an unresponsive docservice channel are out of scope — the app
+// can go false-ready over a dead channel; see cm-findings/DocumentServer/pr-262-ws-hang-false-pass.md.
+test.describe('Mobile editor smoke', () => {
+  test.use({ viewport: { width: 414, height: 896 } });
+
+  for (const editor of MOBILE_EDITOR_TYPES) {
+    test(`${editor.label} mobile editor loads`, async ({ page }) => {
+      // ?type=mobile forces the mobile bundle (bypasses UA sniffing in nodejs/app.js).
+      await page.goto(`/example/editor?fileExt=${editor.fileExt}&type=mobile`);
+
+      const editorIframe = page.locator('iframe[name="frameEditor"]');
+      await expect(editorIframe).toBeAttached({ timeout: 15_000 });
+      await expect(editorIframe).toHaveAttribute('src', /type=mobile/);
+
+      // The real "document loaded" signal is the loading skeleton clearing, not the canvas:
+      // .doc-placeholder (uniform across editors) shows while !isDocReady and is removed when
+      // the doc loads — the mobile analog of the desktop suite's #loading-mask. #id_viewer alone
+      // mounts with the SDK bundle before any document loads, so it can't tell "loaded" apart
+      // from "never loaded". Assert the skeleton appears, then clears, then the shell is clean.
+      const frame = page.frameLocator('iframe[name="frameEditor"]');
+      const placeholder = frame.locator('.doc-placeholder');
+      await expect(placeholder.first()).toBeVisible({ timeout: 15_000 });
+      await expect(placeholder).toHaveCount(0, { timeout: 30_000 });
+      await expect(frame.locator(ERROR_SURFACE_SELECTOR)).toHaveCount(0, { timeout: 5_000 });
+      await expect(frame.locator(editor.canvasSelector)).toBeVisible({ timeout: 5_000 });
+    });
+  }
+});
diff --git a/web-apps b/web-apps
index be0c7c0eae..04b95b159e 160000
--- a/web-apps
+++ b/web-apps
@@ -1 +1 @@
-Subproject commit be0c7c0eae6e5ec90894b4d41019070e6a9a7af2
+Subproject commit 04b95b159e34e117dd4e630b6b733119115d836d