diff --git a/client/src/components/UnifiedSidebar/UnifiedSidebar.tsx b/client/src/components/UnifiedSidebar/UnifiedSidebar.tsx
index 0b2bd54f9ea..a41e8bddf8d 100644
--- a/client/src/components/UnifiedSidebar/UnifiedSidebar.tsx
+++ b/client/src/components/UnifiedSidebar/UnifiedSidebar.tsx
@@ -204,8 +204,12 @@ function UnifiedSidebar({
       className={cn(
         /** The close swipe reads horizontal touches here (the drawer holds no
          * horizontal scrollers), while pinch-zoom stays with the browser:
-         * this full-viewport surface must not disable zooming entirely. */
-        'bg-surface-primary-alt text-text-primary fixed inset-y-0 left-0 flex touch-pan-y touch-pinch-zoom flex-col',
+         * this full-height surface must not disable zooming entirely.
+         * Absolute in the app container rather than fixed to the viewport, so
+         * a site banner above that container stays above the drawer too
+         * instead of covering its header strip, as it already does for the
+         * scrim and the pane. */
+        'bg-surface-primary-alt text-text-primary absolute inset-y-0 left-0 flex touch-pan-y touch-pinch-zoom flex-col',
         /** In dark mode the scrim and the drawer are both near-black, and no
          *  scrim opacity separates them by 3:1, so the drawer draws its own
          *  edge. Light palettes get that separation from the scrim. */
diff --git a/e2e/specs/mock/scenarios/mobile-drawer-banner.spec.ts b/e2e/specs/mock/scenarios/mobile-drawer-banner.spec.ts
new file mode 100644
index 00000000000..12c7efe489e
--- /dev/null
+++ b/e2e/specs/mock/scenarios/mobile-drawer-banner.spec.ts
@@ -0,0 +1,117 @@
+import { expect, test } from '@playwright/test';
+import type { Page } from '@playwright/test';
+import { NEW_CHAT_PATH } from '../helpers';
+
+/**
+ * A site banner sits above the app and stays put while the drawer opens. The drawer opens inside
+ * the app below it, as the scrim and the conversation pane already do, so the banner never covers
+ * the drawer's header strip: the close toggle, the panel switcher, New chat and the account menu
+ * stay visible and tappable.
+ *
+ * Every scenario loads at phone width rather than resizing into it (berry-13/LibreChat#205).
+ */
+
+const DRAWER = '#mobile-drawer';
+const BANNER_TEXT = 'Scheduled maintenance tonight';
+
+type Mode = 'light' | 'dark';
+
+test.use({ viewport: { width: 390, height: 844 } });
+
+async function openDrawer(page: Page, mode: Mode, withBanner: boolean) {
+  await page.addInitScript((appearance) => {
+    localStorage.setItem('color-theme', appearance);
+    localStorage.removeItem('theme-definition');
+    localStorage.removeItem('theme-source');
+    localStorage.removeItem('hideBannerHint');
+  }, mode);
+  /** The banner is the deployment's; this page alone is served one. */
+  await page.route('**/api/banner', (route) =>
+    route.fulfill({
+      json: withBanner
+        ? {
+            bannerId: 'e2e-drawer-banner',
+            message: `<p>${BANNER_TEXT}</p>`,
+            displayFrom: new Date(Date.now() - 60_000).toISOString(),
+            displayTo: new Date(Date.now() + 3_600_000).toISOString(),
+            createdAt: new Date().toISOString(),
+            updatedAt: new Date().toISOString(),
+            isPublic: false,
+            persistable: true,
+          }
+        : null,
+    }),
+  );
+  await page.goto(NEW_CHAT_PATH, { timeout: 15000 });
+  await expect(page.getByRole('textbox', { name: 'Message input' })).toBeVisible({
+    timeout: 30000,
+  });
+  await expect(page.locator('html')).toHaveClass(mode === 'dark' ? /\bdark\b/ : /\blight\b/);
+  if (withBanner) {
+    await expect(page.getByText(BANNER_TEXT)).toBeVisible();
+  }
+
+  const drawer = page.locator(DRAWER);
+  if (!(await drawer.getByTestId('close-sidebar-button').isVisible())) {
+    await page.getByTestId('header-open-sidebar-button').click();
+  }
+  await expect(drawer.getByTestId('close-sidebar-button')).toBeVisible();
+  await expect(drawer).not.toHaveAttribute('inert');
+  await expect.poll(async () => (await drawer.boundingBox())?.x ?? -1, { timeout: 5000 }).toBe(0);
+  return drawer;
+}
+
+/** The element a tap at the center of `selector` would land on, and whether it is that control. */
+async function tapTarget(page: Page, selector: string) {
+  return page.evaluate((target) => {
+    const node = document.querySelector(target);
+    if (!node) {
+      throw new Error(`${target} is not rendered`);
+    }
+    const box = node.getBoundingClientRect();
+    const hit = document.elementFromPoint(box.left + box.width / 2, box.top + box.height / 2);
+    return node === hit || node.contains(hit);
+  }, selector);
+}
+
+for (const mode of ['light', 'dark'] as const) {
+  const tag =
+    mode === 'light'
+      ? '@scenario:mobile-drawer-header-below-banner-light'
+      : '@scenario:mobile-drawer-header-below-banner-dark';
+  test(`the drawer opens below a site banner and its header strip stays tappable (${mode}) ${tag}`, async ({
+    page,
+  }) => {
+    const drawer = await openDrawer(page, mode, true);
+    const banner = await page.getByText(BANNER_TEXT).boundingBox();
+    const drawerBox = await drawer.boundingBox();
+    expect(banner && drawerBox).toBeTruthy();
+    /** Below the banner and down to the bottom of the screen. */
+    expect(drawerBox!.y).toBeGreaterThanOrEqual(banner!.y + banner!.height - 1);
+    expect(drawerBox!.y + drawerBox!.height).toBeCloseTo(844, 0);
+    await expect(page.getByText(BANNER_TEXT)).toBeVisible();
+
+    for (const selector of [
+      `${DRAWER} [data-testid="close-sidebar-button"]`,
+      `${DRAWER} [data-testid="panel-switcher-button"]`,
+      `${DRAWER} [data-testid="nav-new-chat-fab"]`,
+    ]) {
+      expect(await tapTarget(page, selector), `${selector} is covered`).toBe(true);
+    }
+
+    await drawer.getByTestId('close-sidebar-button').click();
+    await expect(drawer).toHaveAttribute('inert', '');
+  });
+}
+
+/** The tags are written out whole above; the runner finds a scenario by its literal tag. */
+test('without a banner the drawer still covers the whole screen height @scenario:mobile-drawer-full-height-without-banner', async ({
+  page,
+}) => {
+  const drawer = await openDrawer(page, 'light', false);
+  const box = await drawer.boundingBox();
+  expect(box).toBeTruthy();
+  expect(box!.y).toBe(0);
+  expect(box!.height).toBeCloseTo(844, 0);
+  expect(await tapTarget(page, `${DRAWER} [data-testid="close-sidebar-button"]`)).toBe(true);
+});