diff --git a/apps/mobile/AGENTS.md b/apps/mobile/AGENTS.md
index 0d9febb40..72e5f9ba0 100644
--- a/apps/mobile/AGENTS.md
+++ b/apps/mobile/AGENTS.md
@@ -13,6 +13,7 @@ The iOS app (`@debatelab/mobile`): Expo SDK 57, React Native 0.86, React 19, Exp
 - Google sign-in needs a development build, because Expo Go cannot receive OAuth redirects. Until then, sign-in is email code or demo code.
 - Native code has no DOM. eslint rejects `window`, `document`, `localStorage`, `sessionStorage` and `location` outside `*.web.ts(x)` files. A `.web.tsx` file exists only for the web preview.
 - `ios/` and `android/` are generated and gitignored. Configure native behaviour in `app.json`.
+- A form sheet's root view is `SheetScrollView` (`src/components/sheet.tsx`), with nothing around it: no `KeyboardAvoidingView`, no wrapping `View`. react-native-screens positions only a scroll view that is the sheet's direct child; a nested one lands below the visible sheet and the sheet looks empty.
 
 ## Layout
 
@@ -22,7 +23,7 @@ The iOS app (`@debatelab/mobile`): Expo SDK 57, React Native 0.86, React 19, Exp
 - `sources.ts` mirrors the session store's `addSource` and `removeSource` and `src/lib/source-import.ts`. The Library always shows the Current Debate, also in one-off mode, as on the website. Adding a file (the website parses files in the browser) and Scan pages are not in the app yet.
 - Ask mirrors `src/lib/ai/streaming.ts` and `askChat` in `src/lib/ai/client.ts`: `ask.ts` sends the requests (plain questions stream from `ai-stream` through `expo/fetch`; with Citations, Web search, Pros/Cons or Argument map on, the whole answer comes from `ai`, because `ai-stream` refuses those options), `ai-request.ts` holds the shared POST with the website's headers, timeout and error kinds, `feature-config.ts` reads each tool's model from `user_settings.feature_configs`, `context-request.ts` builds the Current Debate context with the website's default selection and pins, and `chats.ts` saves finished exchanges to `chats` and `messages`. The SSE parser is shared in `packages/core/src/ai/sse.ts`. `markdown.ts` reads answers, because react-markdown needs the DOM.
 - Generate and Attack mirror `generateCase` and `attackCase` in `src/lib/ai/client.ts` and the session store's `recordResult`: `results.ts` sends the requests through `ai-request.ts`, checks the output with the website's transform (moved to `packages/core/src/ai/generate-output.ts`), keeps researched sources in the debate's Auto-saved folder (`packages/core/src/ai/discovered-sources.ts`), saves the server's source rankings onto the Library sources a result used (`packages/core/src/ai/source-assessments.ts`, also for Ask's whole answers), says when the server shortened the input, and saves rows to `cases` and `attacks`. `motion.ts` and `motion-gate.ts` are the website's motion gate. `open-results.ts` holds results made in this session, so one-off work and failed saves still open as documents. It and the last Generate and Attack forms live in `session-memory.ts`, which the auth provider clears on every account change, including sign-out. `components/document.tsx` draws results as documents (mock 03); Brainstorm and Factoids reuse it. Export renders `export-html.ts` to a PDF with expo-print and shares it (`export.ts`); the web preview cannot print, so `export.web.ts` keeps the HTML and copied text on `window` for the screenshot script. Word export and Google Docs are not in the app.
-- One-off mode is session-only and never written, as on the website. Students prepare both sides of a motion, so a debate has no side: the Debate tab's In favor / Against toggle only chooses which side's work it shows, using the website's rule (`'both'` counts for either side, neutral and side-less work for neither). It starts on In favor and is never stored.
+- One-off mode is session-only and never written, as on the website. The switcher turns it on with or without a Current Debate, and `OneOffNotice` shows it on the Debate tab, Prepare, Ask, Library, Generate and Attack (through `WorkingIn`). The Debate tab, Prepare and Library still list the Current Debate's work in one-off mode, as the website's home does. Students prepare both sides of a motion, so a debate has no side: the Debate tab's In favor / Against toggle only chooses which side's work it shows, using the website's rule (`'both'` counts for either side, neutral and side-less work for neither). It starts on In favor and is never stored.
 - `src/theme/`: colours from the mocks and the website's dark palette, Inter fonts.
 - `scripts/screenshots.ts`: web-export screenshots. `scripts/render-tab-icons.ts` redraws the tab bar PNGs.
 
diff --git a/apps/mobile/app.json b/apps/mobile/app.json
index 13caf6d20..c68036b1a 100644
--- a/apps/mobile/app.json
+++ b/apps/mobile/app.json
@@ -9,7 +9,10 @@
     "userInterfaceStyle": "automatic",
     "ios": {
       "bundleIdentifier": "com.adam.debatelab",
-      "supportsTablet": true
+      "supportsTablet": true,
+      "infoPlist": {
+        "CADisableMinimumFrameDurationOnPhone": true
+      }
     },
     "android": {
       "adaptiveIcon": {
diff --git a/apps/mobile/package.json b/apps/mobile/package.json
index c1ef574cc..65d926152 100644
--- a/apps/mobile/package.json
+++ b/apps/mobile/package.json
@@ -11,6 +11,7 @@
   "dependencies": {
     "@debatelab/core": "*",
     "@expo-google-fonts/inter": "^0.4.2",
+    "@formatjs/intl-pluralrules": "^6.3.15",
     "@react-native-async-storage/async-storage": "2.2.0",
     "@supabase/supabase-js": "^2.49.1",
     "aes-js": "^3.1.2",
diff --git a/apps/mobile/scripts/screenshots.ts b/apps/mobile/scripts/screenshots.ts
index 9628be503..c206daf5b 100644
--- a/apps/mobile/scripts/screenshots.ts
+++ b/apps/mobile/scripts/screenshots.ts
@@ -21,7 +21,10 @@
  * therefore answer the app's user_settings reads with the run's language and
  * the System theme; nothing is written. The Debate tab shows the account's
  * real Current Debate, and its empty state comes from answering the
- * current_debates read with no row. The Debate tab is shot once per side view.
+ * current_debates read with no row. The Debate tab is shot once per side view,
+ * and with one-off mode on, with and without a Current Debate; Prepare and
+ * Generate are shot in one-off mode too. One-off mode is in memory only; the
+ * script toggles it and never taps a debate row.
  *
  * Ask screenshots never call a model and never save a chat: the page answers
  * ai-stream from a fake stream inside the page (expo/fetch uses the page's
@@ -149,12 +152,35 @@ async function shootDebateScreens(page: Page, prefix: string) {
   await page.waitForTimeout(700);
   await shoot(page, `${prefix}-debates-sheet`);
 
+  // One-off mode lives in memory only, so toggling it writes nothing. Never tap a debate row
+  // here: switching saves the pointer and last activity to staging.
+  await turnOnOneOff(page);
+  await shoot(page, `${prefix}-debates-oneoff`);
+  await closeSwitcher(page);
+  await page.getByTestId('one-off-notice').waitFor();
+  await shoot(page, `${prefix}-debate-oneoff`);
+  await page.getByTestId('one-off-notice').getByRole('button').click();
+  await page.getByTestId('one-off-notice').waitFor({ state: 'detached' });
+
+  await page.getByTestId('current-debate-pill').click();
+  await page.getByTestId('debates-sheet').waitFor();
   await page.getByRole('button', { name: /^(New debate|Új vita|Nuevo debate)$/ }).click();
   await page.getByTestId('new-debate-sheet').waitFor();
   await page.waitForTimeout(700);
   await shoot(page, `${prefix}-new-debate`);
 }
 
+async function turnOnOneOff(page: Page) {
+  const toggle = page.getByTestId('debates-sheet').getByRole('switch');
+  await toggle.click();
+  if (!(await toggle.isChecked())) throw new Error('The one-off switch did not turn on');
+}
+
+async function closeSwitcher(page: Page) {
+  await page.getByTestId('debates-sheet').getByRole('button', { name: /^(Done|Kész|Listo)$/ }).click();
+  await page.getByTestId('debates-sheet').waitFor({ state: 'detached' });
+}
+
 // A made-up answer in the shape of mock 07, streamed a word at a time.
 const ASK_QUESTION = 'How do I answer "what about the nurse who drives in at 5 a.m."?';
 const ASK_STREAM = 'Concede the edge case, then shrink it. Three moves:\n\n1. **Exemptions exist.** Every real ban permits shift workers and carers.\n2. **Night buses follow demand.** Cities that closed their centres added routes in the first year.\n3. **Flip it.** The same nurse breathes the air on her walk from the car park.';
@@ -433,6 +459,34 @@ async function shootAskScreens(context: BrowserContext, prefix: string, language
   await streaming.close();
 }
 
+/** Prepare and Generate in one-off mode, reached in the app so the in-memory mode survives. Nothing is sent or saved. */
+async function shootOneOffTools(page: Page, prefix: string) {
+  await page.goto(`${ORIGIN}/`);
+  // Opening the switcher takes the tab out of focus, which drops a load still running; let it finish first.
+  await page.getByTestId('current-debate-motion').waitFor({ timeout: 30_000 });
+  await page.waitForFunction(() => !document.querySelector('[data-testid="debate-counts"]')?.textContent?.includes('–'));
+  await settle(page);
+  await page.getByTestId('current-debate-pill').click();
+  await page.getByTestId('debates-sheet').waitFor();
+  await settle(page);
+  await turnOnOneOff(page);
+  await closeSwitcher(page);
+  await page.getByRole('tab', { name: /^(Prepare|Felkészülés|Preparar)$/ }).click();
+  await page.getByTestId('prepare-tool-generate').waitFor({ timeout: 30_000 });
+  // The Debate tab stays mounted behind Prepare with its own notice; only the visible one is Prepare's.
+  await page.getByTestId('one-off-notice').filter({ visible: true }).waitFor();
+  await settle(page);
+  await shoot(page, `${prefix}-prepare-oneoff`);
+  await page.getByTestId('prepare-tool-generate').click();
+  await page.getByTestId('generate-motion').waitFor({ timeout: 30_000 });
+  const notice = page.getByTestId('generate-screen').getByTestId('one-off-notice');
+  await notice.waitFor();
+  await shoot(page, `${prefix}-generate-oneoff`);
+  // Return to debate turns the mode off in place, and the strip says where work goes again.
+  await notice.getByRole('button').click();
+  await page.getByTestId('generate-screen').getByTestId('working-in').waitFor();
+}
+
 async function shootEmptyDebate(page: Page, prefix: string) {
   await page.route(`${REST}/current_debates*`, (route) =>
     route.fulfill({ status: 200, contentType: 'application/json', json: [] }),
@@ -441,6 +495,18 @@ async function shootEmptyDebate(page: Page, prefix: string) {
   await page.getByTestId('current-debate-pill').waitFor({ timeout: 30_000 });
   await settle(page);
   await shoot(page, `${prefix}-debate-empty`);
+
+  // One-off mode works without a Current Debate too; there is nothing to return to.
+  await page.getByTestId('current-debate-pill').click();
+  await page.getByTestId('debates-sheet').waitFor();
+  await settle(page);
+  await turnOnOneOff(page);
+  await closeSwitcher(page);
+  await page.getByTestId('one-off-notice').waitFor();
+  if ((await page.getByTestId('one-off-notice').getByRole('button').count()) > 0) {
+    throw new Error('One-off mode offered a return without a Current Debate');
+  }
+  await shoot(page, `${prefix}-debate-empty-oneoff`);
 }
 
 async function signIn(browser: Browser, problems: string[]): Promise<StorageState> {
@@ -555,7 +621,7 @@ async function main() {
             await shoot(tabPage, `${prefix}-failed`);
             throw error;
           });
-          shots += 4;
+          shots += 6;
           await shootLibraryScreens(tabPage, prefix).catch(async (error: unknown) => {
             await shoot(tabPage, `${prefix}-failed`);
             throw error;
@@ -573,11 +639,17 @@ async function main() {
           watchErrors(emptyPage, problems, `${prefix} empty`);
           await pinSettings(emptyPage, language);
           await shootEmptyDebate(emptyPage, prefix);
-          shots += 1;
+          shots += 2;
           await shootAskScreens(signedIn, prefix, language, problems);
           shots += 3;
           await shootResultScreens(signedIn, prefix, language, problems);
           shots += 9;
+          const oneOffPage = await signedIn.newPage();
+          watchErrors(oneOffPage, problems, `${prefix} one-off tools`);
+          await pinSettings(oneOffPage, language);
+          await shootOneOffTools(oneOffPage, prefix);
+          await oneOffPage.close();
+          shots += 2;
           await signedIn.close();
         }
       }
diff --git a/apps/mobile/src/app/(tabs)/(debate)/index.tsx b/apps/mobile/src/app/(tabs)/(debate)/index.tsx
index d96f3b6bc..95eec2b0a 100644
--- a/apps/mobile/src/app/(tabs)/(debate)/index.tsx
+++ b/apps/mobile/src/app/(tabs)/(debate)/index.tsx
@@ -8,6 +8,7 @@ import { MainActionButton, TextButton } from '@/components/buttons';
 import { Card, IconTile } from '@/components/card';
 import { Icon } from '@/components/icon';
 import type { IconName } from '@/components/icon-paths';
+import { OneOffNotice } from '@/components/one-off-notice';
 import { PREPARE_TOOLS } from '@/components/prepare-tools';
 import { Screen } from '@/components/screen';
 import { SegmentedControl } from '@/components/segmented-control';
@@ -31,7 +32,7 @@ const RECENT_LIMIT = 3;
 export default function DebateScreen() {
   const { t } = useTranslation();
   const router = useRouter();
-  const { status, current, oneOff, setOneOff, refresh } = useDebates();
+  const { status, current, refresh } = useDebates();
 
   // Debates switched on the website show up when the tab comes back into view.
   const focusedBefore = useRef(false);
@@ -69,6 +70,7 @@ export default function DebateScreen() {
     return (
       <Screen safeTop>
         <SwitcherPill onPress={openSwitcher} />
+        <OneOffNotice />
         <View style={styles.emptyText}>
           <Text accessibilityRole="header" weight="bold" style={styles.emptyTitle}>
             {t('debate.noCurrentTitle')}
@@ -85,7 +87,7 @@ export default function DebateScreen() {
   return (
     <Screen safeTop gap={0}>
       <SwitcherPill onPress={openSwitcher} />
-      {oneOff ? <OneOffNotice onReturn={() => setOneOff(false)} /> : null}
+      <OneOffNotice style={styles.notice} />
       <Text accessibilityRole="header" weight="bold" style={styles.motion} testID="current-debate-motion">
         {current.motion}
       </Text>
@@ -112,19 +114,6 @@ function SwitcherPill({ onPress }: { onPress: () => void }) {
   );
 }
 
-function OneOffNotice({ onReturn }: { onReturn: () => void }) {
-  const { t } = useTranslation();
-  const { colors } = useTheme();
-  return (
-    <View style={[styles.notice, { borderColor: colors.border }]}>
-      <Text tone="secondary" style={styles.noticeText}>
-        {t('debate.oneOffStrip')}
-      </Text>
-      <TextButton label={t('debate.returnToDebate')} onPress={onReturn} />
-    </View>
-  );
-}
-
 /**
  * Counts, the main action, the Prepare tools and recent work for one debate.
  * Students prepare both sides, so the toggle only chooses which side's work is
@@ -317,16 +306,7 @@ const styles = StyleSheet.create({
     marginTop: 4,
   },
   pillLabel: { fontSize: 15 },
-  notice: {
-    marginTop: 12,
-    borderWidth: 1,
-    borderStyle: 'dashed',
-    borderRadius: radius.field,
-    paddingHorizontal: 14,
-    paddingTop: 10,
-    alignItems: 'flex-start',
-  },
-  noticeText: { fontSize: 14, lineHeight: 19 },
+  notice: { marginTop: 12 },
   emptyText: { gap: 8 },
   emptyTitle: { fontSize: 28, lineHeight: 34, letterSpacing: -0.6 },
   motion: { fontSize: 27, lineHeight: 32, letterSpacing: -0.6, marginTop: 12, marginBottom: 15 },
diff --git a/apps/mobile/src/app/(tabs)/(library)/library.tsx b/apps/mobile/src/app/(tabs)/(library)/library.tsx
index efb12a582..43a74edba 100644
--- a/apps/mobile/src/app/(tabs)/(library)/library.tsx
+++ b/apps/mobile/src/app/(tabs)/(library)/library.tsx
@@ -9,6 +9,7 @@ import { Card, IconTile } from '@/components/card';
 import { Chip } from '@/components/chip';
 import { Icon } from '@/components/icon';
 import { LibraryHeader, type AddSourceKind } from '@/components/library-header';
+import { OneOffNotice } from '@/components/one-off-notice';
 import { Screen } from '@/components/screen';
 import { SearchField } from '@/components/search-field';
 import { SOURCE_ICONS, sourceMeta } from '@/components/source-display';
@@ -47,6 +48,8 @@ export default function LibraryScreen() {
   return (
     <Screen>
       <LibraryHeader title={t('mobile.tabs.library')} onAdd={onAdd} disabled={!debateId} />
+      {/* New sources still go to the Current Debate in one-off mode, as on the website, so this only says the mode is on. */}
+      <OneOffNotice message="debate.oneOffActive" />
       {status === 'loading' ? <ActivityIndicator style={styles.loading} /> : null}
       {status !== 'loading' && !debateId ? (
         <Card>
diff --git a/apps/mobile/src/app/(tabs)/(prepare)/prepare.tsx b/apps/mobile/src/app/(tabs)/(prepare)/prepare.tsx
index b3da5f601..5885cfe17 100644
--- a/apps/mobile/src/app/(tabs)/(prepare)/prepare.tsx
+++ b/apps/mobile/src/app/(tabs)/(prepare)/prepare.tsx
@@ -6,6 +6,7 @@ import { ActivityIndicator, Pressable, StyleSheet, View } from 'react-native';
 import { TextButton } from '@/components/buttons';
 import { Card, IconTile } from '@/components/card';
 import { Icon } from '@/components/icon';
+import { OneOffNotice } from '@/components/one-off-notice';
 import { PREPARE_TOOLS, type PrepareTool } from '@/components/prepare-tools';
 import { Screen } from '@/components/screen';
 import { ScreenTitle } from '@/components/screen-title';
@@ -14,6 +15,7 @@ import { WorkRow, workHref } from '@/components/work-row';
 import { useAuth } from '@/lib/auth';
 import { useDebates } from '@/lib/debate-context';
 import { fetchPrepareWork, type DebateItem } from '@/lib/debates';
+import { keepIfSame } from '@/lib/keep-if-same';
 import { useTheme } from '@/theme/use-theme';
 
 const SAVED_LIMIT = 30;
@@ -25,7 +27,7 @@ export default function PrepareScreen() {
   const { colors } = useTheme();
   const { session } = useAuth();
   const userId = session?.user.id ?? null;
-  const { current, oneOff } = useDebates();
+  const { current } = useDebates();
   const debateId = current?.id ?? null;
   // Each load belongs to the debate it was read for, so another debate's results never show, or open, under this one.
   const [loaded, setLoaded] = useState<{ debateId: string; items: DebateItem[] | null; failed: boolean } | null>(null);
@@ -45,7 +47,8 @@ export default function PrepareScreen() {
     try {
       const next = await fetchPrepareWork(userId, forDebate, SAVED_LIMIT);
       if (!isCurrent()) return;
-      setLoaded({ debateId: forDebate, items: next, failed: false });
+      // Every focus rereads the list; an unchanged one keeps its identity, so the rows do not re-render.
+      setLoaded((previous) => keepIfSame(previous, { debateId: forDebate, items: next, failed: false }));
     } catch (cause) {
       if (!isCurrent()) return;
       console.warn('Could not load saved results:', cause instanceof Error ? cause.message : cause);
@@ -66,6 +69,7 @@ export default function PrepareScreen() {
   return (
     <Screen>
       <ScreenTitle title={t('mobile.tabs.prepare')} />
+      <OneOffNotice />
       <Card style={styles.list}>
         {PREPARE_TOOLS.map((tool, index) => (
           <Pressable
@@ -91,9 +95,10 @@ export default function PrepareScreen() {
       <Text accessibilityRole="header" weight="bold" style={styles.section}>
         {t('mobile.prepare.saved')}
       </Text>
-      {oneOff || !debateId ? (
+      {/* The Current Debate's results stay listed in one-off mode, as on the Debate tab and the website's home. */}
+      {!debateId ? (
         <Text tone="secondary" style={styles.body}>
-          {oneOff ? t('debate.oneOffStrip') : t('debate.noCurrentStrip')}
+          {t('debate.noCurrentStrip')}
         </Text>
       ) : failed ? (
         <Card>
diff --git a/apps/mobile/src/app/add-link.tsx b/apps/mobile/src/app/add-link.tsx
index 37ad6a44b..0d141eb40 100644
--- a/apps/mobile/src/app/add-link.tsx
+++ b/apps/mobile/src/app/add-link.tsx
@@ -2,12 +2,12 @@ import type { SourceImportOutput } from '@debatelab/core/ai/schemas/source-impor
 import { useRouter } from 'expo-router';
 import { useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import { KeyboardAvoidingView, Platform, ScrollView, StyleSheet, View } from 'react-native';
-import { useSafeAreaInsets } from 'react-native-safe-area-context';
+import { StyleSheet, View } from 'react-native';
 
 import { MainActionButton, PrimaryButton, TextButton } from '@/components/buttons';
 import { Card } from '@/components/card';
 import { Field } from '@/components/field';
+import { SheetScrollView } from '@/components/sheet';
 import { Text } from '@/components/text';
 import { useAuth } from '@/lib/auth';
 import { useDebates } from '@/lib/debate-context';
@@ -22,7 +22,6 @@ import { useTheme } from '@/theme/use-theme';
 export default function AddLinkSheet() {
   const { t } = useTranslation();
   const router = useRouter();
-  const insets = useSafeAreaInsets();
   const { colors } = useTheme();
   const { session } = useAuth();
   const { current } = useDebates();
@@ -73,78 +72,72 @@ export default function AddLinkSheet() {
   };
 
   return (
-    <KeyboardAvoidingView behavior={Platform.OS === 'ios' ? 'padding' : undefined} style={[styles.root, { backgroundColor: colors.background }]}>
-      <ScrollView
-        contentContainerStyle={[styles.content, { paddingBottom: insets.bottom + 24 }]}
-        keyboardShouldPersistTaps="handled"
-        testID="add-link-sheet">
-        <View style={styles.header}>
-          <Text accessibilityRole="header" weight="bold" style={styles.title}>
-            {t('mobile.library.pasteLink')}
-          </Text>
-          <TextButton label={t('common.cancel')} onPress={() => router.back()} disabled={busy === 'save'} />
-        </View>
+    <SheetScrollView contentContainerStyle={styles.content} testID="add-link-sheet">
+      <View style={styles.header}>
+        <Text accessibilityRole="header" weight="bold" style={styles.title}>
+          {t('mobile.library.pasteLink')}
+        </Text>
+        <TextButton label={t('common.cancel')} onPress={() => router.back()} disabled={busy === 'save'} />
+      </View>
 
-        {!current ? (
-          <Text tone="secondary" style={styles.body}>
-            {t('debate.libraryNeedsDebate')}
-          </Text>
-        ) : (
-          <>
-            <Field
-              label={t('libraryPage.importUrlLabel')}
-              placeholder={t('libraryPage.importUrlPlaceholder')}
-              hint={t('libraryPage.importUrlHelp')}
-              value={url}
-              onChangeText={(next) => {
-                setUrl(next);
-                setDraft(null);
-              }}
-              keyboardType="url"
-              autoCapitalize="none"
-              autoCorrect={false}
-              autoFocus
-              returnKeyType="go"
-              onSubmitEditing={() => void runImport()}
-              editable={busy === null}
-            />
-            {!draft ? (
-              <PrimaryButton label={t('libraryPage.importUrl')} busy={busy === 'import'} disabled={!url.trim()} onPress={() => void runImport()} />
-            ) : (
-              <>
-                <Text weight="medium" tone="secondary" style={styles.label}>
-                  {t('libraryPage.importPreview')}
+      {!current ? (
+        <Text tone="secondary" style={styles.body}>
+          {t('debate.libraryNeedsDebate')}
+        </Text>
+      ) : (
+        <>
+          <Field
+            label={t('libraryPage.importUrlLabel')}
+            placeholder={t('libraryPage.importUrlPlaceholder')}
+            hint={t('libraryPage.importUrlHelp')}
+            value={url}
+            onChangeText={(next) => {
+              setUrl(next);
+              setDraft(null);
+            }}
+            keyboardType="url"
+            autoCapitalize="none"
+            autoCorrect={false}
+            autoFocus
+            returnKeyType="go"
+            onSubmitEditing={() => void runImport()}
+            editable={busy === null}
+          />
+          {!draft ? (
+            <PrimaryButton label={t('libraryPage.importUrl')} busy={busy === 'import'} disabled={!url.trim()} onPress={() => void runImport()} />
+          ) : (
+            <>
+              <Text weight="medium" tone="secondary" style={styles.label}>
+                {t('libraryPage.importPreview')}
+              </Text>
+              <Card>
+                <Field label={t('libraryPage.titleLabel')} value={title} onChangeText={setTitle} editable={busy === null} />
+                <Text tone="faint" style={styles.meta}>
+                  {`${draft.domain} · ${draft.wordCount} ${t('libraryPage.words')}`}
                 </Text>
-                <Card>
-                  <Field label={t('libraryPage.titleLabel')} value={title} onChangeText={setTitle} editable={busy === null} />
-                  <Text tone="faint" style={styles.meta}>
-                    {`${draft.domain} · ${draft.wordCount} ${t('libraryPage.words')}`}
+                {draft.excerpt ? (
+                  <Text tone="secondary" style={styles.body} numberOfLines={5}>
+                    {draft.excerpt}
                   </Text>
-                  {draft.excerpt ? (
-                    <Text tone="secondary" style={styles.body} numberOfLines={5}>
-                      {draft.excerpt}
-                    </Text>
-                  ) : null}
-                </Card>
-                <MainActionButton label={t('libraryPage.saveImported')} busy={busy === 'save'} disabled={!title.trim()} onPress={() => void save()} />
-              </>
-            )}
-          </>
-        )}
+                ) : null}
+              </Card>
+              <MainActionButton label={t('libraryPage.saveImported')} busy={busy === 'save'} disabled={!title.trim()} onPress={() => void save()} />
+            </>
+          )}
+        </>
+      )}
 
-        {error ? (
-          <Text accessibilityRole="alert" weight="medium" style={[styles.body, { color: colors.destructive }]}>
-            {error}
-          </Text>
-        ) : null}
-      </ScrollView>
-    </KeyboardAvoidingView>
+      {error ? (
+        <Text accessibilityRole="alert" weight="medium" style={[styles.body, { color: colors.destructive }]}>
+          {error}
+        </Text>
+      ) : null}
+    </SheetScrollView>
   );
 }
 
 const styles = StyleSheet.create({
-  root: { flex: 1 },
-  content: { paddingHorizontal: 20, paddingTop: 22, gap: 16, width: '100%', maxWidth: 640, alignSelf: 'center' },
+  content: { gap: 16 },
   header: { flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between', gap: 12 },
   title: { fontSize: 21, lineHeight: 26, letterSpacing: -0.3, flexShrink: 1 },
   body: { fontSize: 15, lineHeight: 21 },
diff --git a/apps/mobile/src/app/ask.tsx b/apps/mobile/src/app/ask.tsx
index 0d432ced5..9b9678d0c 100644
--- a/apps/mobile/src/app/ask.tsx
+++ b/apps/mobile/src/app/ask.tsx
@@ -11,6 +11,7 @@ import { TextButton } from '@/components/buttons';
 import { Chip } from '@/components/chip';
 import { Icon } from '@/components/icon';
 import type { IconName } from '@/components/icon-paths';
+import { OneOffNotice } from '@/components/one-off-notice';
 import { Text } from '@/components/text';
 import { AIError, isAbortError, type AIErrorKind, type ResponseExtras } from '@/lib/ai-request';
 import { askOnce, canStream, isFinalAskError, isMessageWithinBudget, streamAsk, type AskOptions } from '@/lib/ask';
@@ -353,7 +354,9 @@ export default function AskScreen() {
         contentContainerStyle={styles.messagesContent}
         keyboardShouldPersistTaps="handled"
         keyboardDismissMode="interactive"
-        onContentSizeChange={() => scroll.current?.scrollToEnd({ animated: true })}>
+        // A streamed answer grows every 30 ms; restarting an animated scroll each time stutters.
+        onContentSizeChange={() => scroll.current?.scrollToEnd({ animated: streaming === null })}>
+        <OneOffNotice />
         {messages.length === 0 && streaming === null && !busy ? (
           <View style={styles.empty}>
             <Text weight="semibold" style={styles.emptyTitle}>
diff --git a/apps/mobile/src/app/debates.tsx b/apps/mobile/src/app/debates.tsx
index fd2f11f17..753e3baab 100644
--- a/apps/mobile/src/app/debates.tsx
+++ b/apps/mobile/src/app/debates.tsx
@@ -1,12 +1,12 @@
 import { useRouter } from 'expo-router';
 import { useEffect, useMemo, useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import { ActivityIndicator, Pressable, ScrollView, StyleSheet, Switch, TextInput, View } from 'react-native';
-import { useSafeAreaInsets } from 'react-native-safe-area-context';
+import { ActivityIndicator, Pressable, StyleSheet, Switch, TextInput, View } from 'react-native';
 
 import { PrimaryButton, TextButton } from '@/components/buttons';
 import { Card } from '@/components/card';
 import { Icon } from '@/components/icon';
+import { SheetScrollView } from '@/components/sheet';
 import { Text } from '@/components/text';
 import { useAuth } from '@/lib/auth';
 import { useDebates } from '@/lib/debate-context';
@@ -24,7 +24,6 @@ function normalize(text: string) {
 export default function DebatesSheet() {
   const { t } = useTranslation();
   const router = useRouter();
-  const insets = useSafeAreaInsets();
   const { colors } = useTheme();
   const { status, debates, current, oneOff, setOneOff, switchTo, refresh } = useDebates();
   const { session } = useAuth();
@@ -76,11 +75,7 @@ export default function DebatesSheet() {
   };
 
   return (
-    <ScrollView
-      style={{ backgroundColor: colors.background }}
-      contentContainerStyle={[styles.content, { paddingBottom: insets.bottom + 24 }]}
-      keyboardShouldPersistTaps="handled"
-      testID="debates-sheet">
+    <SheetScrollView contentContainerStyle={styles.content} testID="debates-sheet">
       <View style={styles.header}>
         <Text accessibilityRole="header" weight="bold" style={styles.title}>
           {t('debate.yourDebates')}
@@ -180,7 +175,6 @@ export default function DebatesSheet() {
           <Switch
             value={oneOff}
             onValueChange={setOneOff}
-            disabled={!current}
             accessibilityLabel={t('mobile.debates.oneOff')}
             trackColor={{ false: colors.border, true: colors.primary }}
             ios_backgroundColor={colors.border}
@@ -196,12 +190,12 @@ export default function DebatesSheet() {
       ) : null}
 
       <PrimaryButton icon="plus" label={t('mobile.debates.newDebate')} onPress={() => router.push('/new-debate')} />
-    </ScrollView>
+    </SheetScrollView>
   );
 }
 
 const styles = StyleSheet.create({
-  content: { paddingHorizontal: 20, paddingTop: 22, gap: 14, width: '100%', maxWidth: 640, alignSelf: 'center' },
+  content: { gap: 14 },
   header: { flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between', gap: 12 },
   title: { fontSize: 21, lineHeight: 26, letterSpacing: -0.3, flexShrink: 1 },
   search: {
diff --git a/apps/mobile/src/app/delete-account.tsx b/apps/mobile/src/app/delete-account.tsx
index 39a1d691c..d9a1fa9e9 100644
--- a/apps/mobile/src/app/delete-account.tsx
+++ b/apps/mobile/src/app/delete-account.tsx
@@ -2,11 +2,11 @@ import AsyncStorage from '@react-native-async-storage/async-storage';
 import { useRouter } from 'expo-router';
 import { useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import { KeyboardAvoidingView, Platform, ScrollView, StyleSheet, View } from 'react-native';
-import { useSafeAreaInsets } from 'react-native-safe-area-context';
+import { StyleSheet, View } from 'react-native';
 
 import { PrimaryButton, TextButton } from '@/components/buttons';
 import { Field } from '@/components/field';
+import { SheetScrollView } from '@/components/sheet';
 import { Text } from '@/components/text';
 import { deleteAccount, deletionConfirmation } from '@/lib/account';
 import { useAuth } from '@/lib/auth';
@@ -22,7 +22,6 @@ async function forgetAccount(userId: string) {
 export default function DeleteAccountSheet() {
   const { t } = useTranslation();
   const router = useRouter();
-  const insets = useSafeAreaInsets();
   const { colors } = useTheme();
   const { session, signOut } = useAuth();
   const email = session?.user.email;
@@ -51,59 +50,51 @@ export default function DeleteAccountSheet() {
   };
 
   return (
-    <KeyboardAvoidingView
-      behavior={Platform.OS === 'ios' ? 'padding' : undefined}
-      style={[styles.root, { backgroundColor: colors.background }]}>
-      <ScrollView
-        contentContainerStyle={[styles.content, { paddingBottom: insets.bottom + 24 }]}
-        keyboardShouldPersistTaps="handled">
-        <View style={styles.header}>
-          <Text accessibilityRole="header" weight="bold" style={styles.title}>
-            {t('settings.deleteAccountDialogTitle')}
+    <SheetScrollView>
+      <View style={styles.header}>
+        <Text accessibilityRole="header" weight="bold" style={styles.title}>
+          {t('settings.deleteAccountDialogTitle')}
+        </Text>
+        <TextButton label={t('common.cancel')} onPress={() => router.back()} disabled={deleting} />
+      </View>
+      <Text tone="secondary" style={styles.body} testID="account-email">
+        {t('settings.deleteAccountDialogDesc', { email: email || t('settings.unknownUser') })}
+      </Text>
+      <Field
+        label={email ? t('settings.typeEmailConfirm') : t('settings.typeDeleteConfirm')}
+        value={confirmation}
+        onChangeText={setConfirmation}
+        placeholder={expected}
+        autoCapitalize="none"
+        autoCorrect={false}
+        autoComplete="off"
+        keyboardType={email ? 'email-address' : 'default'}
+        editable={!deleting}
+        returnKeyType="done"
+        onSubmitEditing={() => void remove()}
+      />
+      {failed ? (
+        <View accessibilityRole="alert" style={styles.error}>
+          <Text weight="semibold" style={[styles.body, { color: colors.destructive }]}>
+            {t('settings.deleteAccountFailed')}
+          </Text>
+          <Text style={[styles.body, { color: colors.destructive }]}>
+            {t('mobile.deleteAccount.failedHint')}
           </Text>
-          <TextButton label={t('common.cancel')} onPress={() => router.back()} disabled={deleting} />
         </View>
-        <Text tone="secondary" style={styles.body} testID="account-email">
-          {t('settings.deleteAccountDialogDesc', { email: email || t('settings.unknownUser') })}
-        </Text>
-        <Field
-          label={email ? t('settings.typeEmailConfirm') : t('settings.typeDeleteConfirm')}
-          value={confirmation}
-          onChangeText={setConfirmation}
-          placeholder={expected}
-          autoCapitalize="none"
-          autoCorrect={false}
-          autoComplete="off"
-          keyboardType={email ? 'email-address' : 'default'}
-          editable={!deleting}
-          returnKeyType="done"
-          onSubmitEditing={() => void remove()}
-        />
-        {failed ? (
-          <View accessibilityRole="alert" style={styles.error}>
-            <Text weight="semibold" style={[styles.body, { color: colors.destructive }]}>
-              {t('settings.deleteAccountFailed')}
-            </Text>
-            <Text style={[styles.body, { color: colors.destructive }]}>
-              {t('mobile.deleteAccount.failedHint')}
-            </Text>
-          </View>
-        ) : null}
-        <PrimaryButton
-          destructive
-          label={deleting ? t('settings.deletingAccount') : t('settings.deleteAccount')}
-          busy={deleting}
-          disabled={confirmation !== expected}
-          onPress={() => void remove()}
-        />
-      </ScrollView>
-    </KeyboardAvoidingView>
+      ) : null}
+      <PrimaryButton
+        destructive
+        label={deleting ? t('settings.deletingAccount') : t('settings.deleteAccount')}
+        busy={deleting}
+        disabled={confirmation !== expected}
+        onPress={() => void remove()}
+      />
+    </SheetScrollView>
   );
 }
 
 const styles = StyleSheet.create({
-  root: { flex: 1 },
-  content: { paddingHorizontal: 20, paddingTop: 22, gap: 18, width: '100%', maxWidth: 640, alignSelf: 'center' },
   header: { flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between', gap: 12 },
   title: { fontSize: 21, lineHeight: 26, letterSpacing: -0.3, flexShrink: 1 },
   body: { fontSize: 15, lineHeight: 21 },
diff --git a/apps/mobile/src/app/new-debate.tsx b/apps/mobile/src/app/new-debate.tsx
index 3760d78f4..3d1f46a26 100644
--- a/apps/mobile/src/app/new-debate.tsx
+++ b/apps/mobile/src/app/new-debate.tsx
@@ -1,13 +1,13 @@
 import { useRouter } from 'expo-router';
 import { useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import { KeyboardAvoidingView, Platform, Pressable, ScrollView, StyleSheet, View } from 'react-native';
-import { useSafeAreaInsets } from 'react-native-safe-area-context';
+import { Pressable, StyleSheet, View } from 'react-native';
 
 import { MainActionButton, TextButton } from '@/components/buttons';
 import { Card } from '@/components/card';
 import { Field } from '@/components/field';
 import { Icon } from '@/components/icon';
+import { SheetScrollView } from '@/components/sheet';
 import { Text } from '@/components/text';
 import { useDebates } from '@/lib/debate-context';
 import { DEBATE_FORMATS, MAX_MOTION_LENGTH, type DebateFormat } from '@/lib/debates';
@@ -17,7 +17,6 @@ import { useTheme } from '@/theme/use-theme';
 export default function NewDebateSheet() {
   const { t } = useTranslation();
   const router = useRouter();
-  const insets = useSafeAreaInsets();
   const { colors } = useTheme();
   const { create } = useDebates();
   const [motion, setMotion] = useState('');
@@ -43,84 +42,75 @@ export default function NewDebateSheet() {
   };
 
   return (
-    <KeyboardAvoidingView
-      behavior={Platform.OS === 'ios' ? 'padding' : undefined}
-      style={[styles.root, { backgroundColor: colors.background }]}>
-      <ScrollView
-        contentContainerStyle={[styles.content, { paddingBottom: insets.bottom + 24 }]}
-        keyboardShouldPersistTaps="handled"
-        testID="new-debate-sheet">
-        <View style={styles.header}>
-          <Text accessibilityRole="header" weight="bold" style={styles.title}>
-            {t('debate.startNew')}
-          </Text>
-          <TextButton label={t('common.cancel')} onPress={() => router.back()} disabled={saving} />
-        </View>
-        <Text tone="secondary" style={styles.body}>
-          {t('debate.startNewDesc')}
+    <SheetScrollView testID="new-debate-sheet">
+      <View style={styles.header}>
+        <Text accessibilityRole="header" weight="bold" style={styles.title}>
+          {t('debate.startNew')}
         </Text>
+        <TextButton label={t('common.cancel')} onPress={() => router.back()} disabled={saving} />
+      </View>
+      <Text tone="secondary" style={styles.body}>
+        {t('debate.startNewDesc')}
+      </Text>
 
-        <Field
-          label={t('debate.motion')}
-          placeholder={t('debate.motionPlaceholder')}
-          value={motion}
-          onChangeText={setMotion}
-          maxLength={MAX_MOTION_LENGTH}
-          multiline
-          autoFocus
-          editable={!saving}
-          style={styles.motion}
-        />
+      <Field
+        label={t('debate.motion')}
+        placeholder={t('debate.motionPlaceholder')}
+        value={motion}
+        onChangeText={setMotion}
+        maxLength={MAX_MOTION_LENGTH}
+        multiline
+        autoFocus
+        editable={!saving}
+        style={styles.motion}
+      />
 
-        <View style={styles.group}>
-          <Text weight="medium" tone="secondary" style={styles.label}>
-            {t('debate.format')}
-          </Text>
-          <Card style={styles.list}>
-            {DEBATE_FORMATS.map((value, index) => {
-              const selected = value === format;
-              return (
-                <Pressable
-                  key={value}
-                  accessibilityRole="radio"
-                  accessibilityState={{ selected, disabled: saving }}
-                  disabled={saving}
-                  onPress={() => setFormat(value)}
-                  style={({ pressed }) => [
-                    styles.option,
-                    index > 0 && { borderTopWidth: 1, borderTopColor: colors.line },
-                    pressed && styles.pressed,
-                  ]}>
-                  <Text weight={selected ? 'semibold' : 'regular'} style={styles.optionLabel}>
-                    {t(`debate.formats.${value}`)}
-                  </Text>
-                  {selected ? <Icon name="check" color={colors.primary} size={21} /> : null}
-                </Pressable>
-              );
-            })}
-          </Card>
-        </View>
+      <View style={styles.group}>
+        <Text weight="medium" tone="secondary" style={styles.label}>
+          {t('debate.format')}
+        </Text>
+        <Card style={styles.list}>
+          {DEBATE_FORMATS.map((value, index) => {
+            const selected = value === format;
+            return (
+              <Pressable
+                key={value}
+                accessibilityRole="radio"
+                accessibilityState={{ selected, disabled: saving }}
+                disabled={saving}
+                onPress={() => setFormat(value)}
+                style={({ pressed }) => [
+                  styles.option,
+                  index > 0 && { borderTopWidth: 1, borderTopColor: colors.line },
+                  pressed && styles.pressed,
+                ]}>
+                <Text weight={selected ? 'semibold' : 'regular'} style={styles.optionLabel}>
+                  {t(`debate.formats.${value}`)}
+                </Text>
+                {selected ? <Icon name="check" color={colors.primary} size={21} /> : null}
+              </Pressable>
+            );
+          })}
+        </Card>
+      </View>
 
-        {error ? (
-          <Text accessibilityRole="alert" weight="medium" style={[styles.body, { color: colors.destructive }]}>
-            {error}
-          </Text>
-        ) : null}
+      {error ? (
+        <Text accessibilityRole="alert" weight="medium" style={[styles.body, { color: colors.destructive }]}>
+          {error}
+        </Text>
+      ) : null}
 
-        <MainActionButton
-          label={t('debate.startDebate')}
-          busy={saving}
-          disabled={!motion.trim()}
-          onPress={() => void submit()}
-        />
-      </ScrollView>
-    </KeyboardAvoidingView>
+      <MainActionButton
+        label={t('debate.startDebate')}
+        busy={saving}
+        disabled={!motion.trim()}
+        onPress={() => void submit()}
+      />
+    </SheetScrollView>
   );
 }
 
 const styles = StyleSheet.create({
-  root: { flex: 1 },
-  content: { paddingHorizontal: 20, paddingTop: 22, gap: 18, width: '100%', maxWidth: 640, alignSelf: 'center' },
   header: { flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between', gap: 12 },
   title: { fontSize: 21, lineHeight: 26, letterSpacing: -0.3, flexShrink: 1 },
   body: { fontSize: 15, lineHeight: 21 },
diff --git a/apps/mobile/src/app/new-note.tsx b/apps/mobile/src/app/new-note.tsx
index 4e89c5907..22874dd59 100644
--- a/apps/mobile/src/app/new-note.tsx
+++ b/apps/mobile/src/app/new-note.tsx
@@ -1,11 +1,11 @@
 import { useRouter } from 'expo-router';
 import { useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import { KeyboardAvoidingView, Platform, ScrollView, StyleSheet, View } from 'react-native';
-import { useSafeAreaInsets } from 'react-native-safe-area-context';
+import { StyleSheet, View } from 'react-native';
 
 import { MainActionButton, TextButton } from '@/components/buttons';
 import { Field } from '@/components/field';
+import { SheetScrollView } from '@/components/sheet';
 import { Text } from '@/components/text';
 import { useAuth } from '@/lib/auth';
 import { useDebates } from '@/lib/debate-context';
@@ -16,7 +16,6 @@ import { useTheme } from '@/theme/use-theme';
 export default function NewNoteSheet() {
   const { t } = useTranslation();
   const router = useRouter();
-  const insets = useSafeAreaInsets();
   const { colors } = useTheme();
   const { session } = useAuth();
   const { current } = useDebates();
@@ -43,57 +42,50 @@ export default function NewNoteSheet() {
   };
 
   return (
-    <KeyboardAvoidingView behavior={Platform.OS === 'ios' ? 'padding' : undefined} style={[styles.root, { backgroundColor: colors.background }]}>
-      <ScrollView
-        contentContainerStyle={[styles.content, { paddingBottom: insets.bottom + 24 }]}
-        keyboardShouldPersistTaps="handled"
-        testID="new-note-sheet">
-        <View style={styles.header}>
-          <Text accessibilityRole="header" weight="bold" style={styles.title}>
-            {t('mobile.library.writeNote')}
-          </Text>
-          <TextButton label={t('common.cancel')} onPress={() => router.back()} disabled={saving} />
-        </View>
+    <SheetScrollView testID="new-note-sheet">
+      <View style={styles.header}>
+        <Text accessibilityRole="header" weight="bold" style={styles.title}>
+          {t('mobile.library.writeNote')}
+        </Text>
+        <TextButton label={t('common.cancel')} onPress={() => router.back()} disabled={saving} />
+      </View>
 
-        {!current ? (
-          <Text tone="secondary" style={styles.body}>
-            {t('debate.libraryNeedsDebate')}
-          </Text>
-        ) : (
-          <>
-            <Field
-              label={t('libraryPage.titleLabel')}
-              placeholder={t('libraryPage.titlePlaceholder')}
-              value={title}
-              onChangeText={setTitle}
-              autoFocus
-              editable={!saving}
-            />
-            <Field
-              label={t('libraryPage.contentLabel')}
-              placeholder={t('libraryPage.contentPlaceholder')}
-              value={content}
-              onChangeText={setContent}
-              multiline
-              editable={!saving}
-              style={styles.noteBody}
-            />
-            {error ? (
-              <Text accessibilityRole="alert" weight="medium" style={[styles.body, { color: colors.destructive }]}>
-                {error}
-              </Text>
-            ) : null}
-            <MainActionButton label={t('common.save')} busy={saving} disabled={!ready} onPress={() => void save()} />
-          </>
-        )}
-      </ScrollView>
-    </KeyboardAvoidingView>
+      {!current ? (
+        <Text tone="secondary" style={styles.body}>
+          {t('debate.libraryNeedsDebate')}
+        </Text>
+      ) : (
+        <>
+          <Field
+            label={t('libraryPage.titleLabel')}
+            placeholder={t('libraryPage.titlePlaceholder')}
+            value={title}
+            onChangeText={setTitle}
+            autoFocus
+            editable={!saving}
+          />
+          <Field
+            label={t('libraryPage.contentLabel')}
+            placeholder={t('libraryPage.contentPlaceholder')}
+            value={content}
+            onChangeText={setContent}
+            multiline
+            editable={!saving}
+            style={styles.noteBody}
+          />
+          {error ? (
+            <Text accessibilityRole="alert" weight="medium" style={[styles.body, { color: colors.destructive }]}>
+              {error}
+            </Text>
+          ) : null}
+          <MainActionButton label={t('common.save')} busy={saving} disabled={!ready} onPress={() => void save()} />
+        </>
+      )}
+    </SheetScrollView>
   );
 }
 
 const styles = StyleSheet.create({
-  root: { flex: 1 },
-  content: { paddingHorizontal: 20, paddingTop: 22, gap: 18, width: '100%', maxWidth: 640, alignSelf: 'center' },
   header: { flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between', gap: 12 },
   title: { fontSize: 21, lineHeight: 26, letterSpacing: -0.3, flexShrink: 1 },
   body: { fontSize: 15, lineHeight: 21 },
diff --git a/apps/mobile/src/app/source/[id].tsx b/apps/mobile/src/app/source/[id].tsx
index a9dc498db..c15de2591 100644
--- a/apps/mobile/src/app/source/[id].tsx
+++ b/apps/mobile/src/app/source/[id].tsx
@@ -2,12 +2,12 @@ import { useLocalSearchParams, useRouter } from 'expo-router';
 import * as WebBrowser from 'expo-web-browser';
 import { useEffect, useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import { ActivityIndicator, Pressable, ScrollView, StyleSheet, View } from 'react-native';
-import { useSafeAreaInsets } from 'react-native-safe-area-context';
+import { ActivityIndicator, Pressable, StyleSheet, View } from 'react-native';
 
 import { TextButton } from '@/components/buttons';
 import { Card, IconTile } from '@/components/card';
 import { Icon } from '@/components/icon';
+import { SheetScrollView } from '@/components/sheet';
 import { SOURCE_ICONS, sourceMeta } from '@/components/source-display';
 import { Text } from '@/components/text';
 import { useAuth } from '@/lib/auth';
@@ -22,7 +22,6 @@ function webUrl(origin: string | null): string | null {
 export default function SourceSheet() {
   const { t } = useTranslation();
   const router = useRouter();
-  const insets = useSafeAreaInsets();
   const { colors } = useTheme();
   const { id } = useLocalSearchParams<{ id: string }>();
   const { session } = useAuth();
@@ -49,10 +48,7 @@ export default function SourceSheet() {
   const url = webUrl(source?.origin ?? null);
 
   return (
-    <ScrollView
-      style={{ backgroundColor: colors.background }}
-      contentContainerStyle={[styles.content, { paddingBottom: insets.bottom + 24 }]}
-      testID="source-sheet">
+    <SheetScrollView contentContainerStyle={styles.content} testID="source-sheet">
       <View style={styles.header}>
         <View style={styles.headerText}>
           {source ? (
@@ -106,12 +102,12 @@ export default function SourceSheet() {
           </Card>
         </>
       )}
-    </ScrollView>
+    </SheetScrollView>
   );
 }
 
 const styles = StyleSheet.create({
-  content: { paddingHorizontal: 20, paddingTop: 18, gap: 14, width: '100%', maxWidth: 640, alignSelf: 'center' },
+  content: { paddingTop: 18, gap: 14 },
   header: { flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between', gap: 12 },
   headerText: { flex: 1 },
   kind: { flexDirection: 'row', alignItems: 'center', gap: 9 },
diff --git a/apps/mobile/src/components/one-off-notice.tsx b/apps/mobile/src/components/one-off-notice.tsx
new file mode 100644
index 000000000..dedd8f784
--- /dev/null
+++ b/apps/mobile/src/components/one-off-notice.tsx
@@ -0,0 +1,46 @@
+import { useTranslation } from 'react-i18next';
+import { StyleSheet, View, type StyleProp, type ViewStyle } from 'react-native';
+
+import { TextButton } from '@/components/buttons';
+import { Text } from '@/components/text';
+import { useDebates } from '@/lib/debate-context';
+import { radius } from '@/theme/colors';
+import { useTheme } from '@/theme/use-theme';
+
+/**
+ * Shown while one-off mode is on, like the website's CurrentDebateStrip: the message always,
+ * and "Return to debate" only when there is a Current Debate to return to.
+ */
+export function OneOffNotice({
+  message = 'debate.oneOffStrip',
+  style,
+}: {
+  message?: 'debate.oneOffStrip' | 'debate.oneOffActive';
+  style?: StyleProp<ViewStyle>;
+}) {
+  const { t } = useTranslation();
+  const { colors } = useTheme();
+  const { oneOff, current, setOneOff } = useDebates();
+  if (!oneOff) return null;
+  return (
+    <View style={[styles.notice, { borderColor: colors.border }, !current && styles.noAction, style]} testID="one-off-notice">
+      <Text tone="secondary" style={styles.text}>
+        {t(message)}
+      </Text>
+      {current ? <TextButton label={t('debate.returnToDebate')} onPress={() => setOneOff(false)} /> : null}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  notice: {
+    borderWidth: 1,
+    borderStyle: 'dashed',
+    borderRadius: radius.field,
+    paddingHorizontal: 14,
+    paddingTop: 10,
+    alignItems: 'flex-start',
+  },
+  noAction: { paddingBottom: 10 },
+  text: { fontSize: 14, lineHeight: 19 },
+});
diff --git a/apps/mobile/src/components/sheet.tsx b/apps/mobile/src/components/sheet.tsx
new file mode 100644
index 000000000..1704df017
--- /dev/null
+++ b/apps/mobile/src/components/sheet.tsx
@@ -0,0 +1,40 @@
+import type { ReactNode } from 'react';
+import { ScrollView, StyleSheet, type StyleProp, type ViewStyle } from 'react-native';
+import { useSafeAreaInsets } from 'react-native-safe-area-context';
+
+import { useTheme } from '@/theme/use-theme';
+
+/**
+ * The scrolling body of a form sheet. It must be the sheet's root view: react-native-screens
+ * sizes a form sheet's scroll view natively, and only a direct child keeps its position. Wrapped
+ * in a KeyboardAvoidingView or any other view, it falls back to `setFrame(screen.frame)`, which
+ * copies the sheet's slide-in offset and leaves the content below the visible sheet.
+ * The sheet rises to its top detent when the keyboard opens; the insets scroll fields clear of it.
+ */
+export function SheetScrollView({
+  children,
+  contentContainerStyle,
+  testID,
+}: {
+  children: ReactNode;
+  contentContainerStyle?: StyleProp<ViewStyle>;
+  testID?: string;
+}) {
+  const insets = useSafeAreaInsets();
+  const { colors } = useTheme();
+  return (
+    <ScrollView
+      style={{ backgroundColor: colors.background }}
+      contentContainerStyle={[styles.content, contentContainerStyle, { paddingBottom: insets.bottom + 24 }]}
+      automaticallyAdjustKeyboardInsets
+      keyboardShouldPersistTaps="handled"
+      keyboardDismissMode="interactive"
+      testID={testID}>
+      {children}
+    </ScrollView>
+  );
+}
+
+const styles = StyleSheet.create({
+  content: { paddingHorizontal: 20, paddingTop: 22, gap: 18, width: '100%', maxWidth: 640, alignSelf: 'center' },
+});
diff --git a/apps/mobile/src/components/tab-stack.tsx b/apps/mobile/src/components/tab-stack.tsx
index 5b2b075ea..4bb6e1cf7 100644
--- a/apps/mobile/src/components/tab-stack.tsx
+++ b/apps/mobile/src/components/tab-stack.tsx
@@ -1,8 +1,13 @@
 import { Stack } from 'expo-router';
+import { Platform } from 'react-native';
 
 import { fontFamily } from '@/theme/fonts';
 import { useTheme } from '@/theme/use-theme';
 
+// iOS 26 draws its own scroll edge effect under a transparent header; a blur on top of it
+// doubles the effect (react-native-screens warns). Earlier iOS has no edge effect, so it keeps the blur.
+const legacyHeaderBlur = Platform.OS === 'ios' && Number.parseInt(String(Platform.Version), 10) < 26;
+
 /** Each tab is a native stack with an iOS large title, so later screens can push onto it. */
 export function TabStack({ largeTitle = true }: { largeTitle?: boolean }) {
   const { colors } = useTheme();
@@ -12,7 +17,7 @@ export function TabStack({ largeTitle = true }: { largeTitle?: boolean }) {
         headerShown: largeTitle,
         headerLargeTitleEnabled: true,
         headerTransparent: true,
-        headerBlurEffect: 'systemMaterial',
+        headerBlurEffect: legacyHeaderBlur ? 'systemMaterial' : 'none',
         headerShadowVisible: false,
         headerLargeTitleShadowVisible: false,
         headerLargeStyle: { backgroundColor: 'transparent' },
diff --git a/apps/mobile/src/components/tool-form.tsx b/apps/mobile/src/components/tool-form.tsx
index 9dce46cda..e100c4eab 100644
--- a/apps/mobile/src/components/tool-form.tsx
+++ b/apps/mobile/src/components/tool-form.tsx
@@ -4,6 +4,7 @@ import { useTranslation } from 'react-i18next';
 import { ActivityIndicator, StyleSheet, View } from 'react-native';
 
 import { TextButton } from './buttons';
+import { OneOffNotice } from './one-off-notice';
 import { Text } from './text';
 
 import type { AIErrorKind } from '@/lib/ai-request';
@@ -25,18 +26,15 @@ export function ToolTitle({ title, subtitle }: { title: string; subtitle: string
   );
 }
 
-/** Where new work will be saved, as the website's CurrentDebateStrip says it. */
+/** Where new work will be saved, as the website's CurrentDebateStrip says it. In one-off mode it offers the way back to the Current Debate. */
 export function WorkingIn() {
   const { t } = useTranslation();
   const { colors } = useTheme();
   const { current, oneOff } = useDebates();
+  if (oneOff) return <OneOffNotice />;
   return (
-    <View style={[styles.strip, { borderColor: colors.border }, oneOff && styles.dashed]} testID="working-in">
-      {oneOff ? (
-        <Text tone="secondary" style={styles.stripText}>
-          {t('debate.oneOffStrip')}
-        </Text>
-      ) : current ? (
+    <View style={[styles.strip, { borderColor: colors.border }]} testID="working-in">
+      {current ? (
         <Text tone="secondary" style={styles.stripText} numberOfLines={2}>
           {`${t('debate.workingIn')} `}
           <Text weight="semibold" style={styles.stripText}>
@@ -108,7 +106,6 @@ const styles = StyleSheet.create({
   title: { fontSize: 30, lineHeight: 36, letterSpacing: -0.8 },
   subtitle: { fontSize: 16, lineHeight: 22 },
   strip: { borderWidth: 1, borderRadius: radius.field, paddingHorizontal: 14, paddingVertical: 10 },
-  dashed: { borderStyle: 'dashed' },
   stripText: { fontSize: 14.5, lineHeight: 20 },
   error: { borderWidth: 1, borderRadius: radius.card, padding: 14, gap: 4 },
   errorTitle: { fontSize: 16 },
diff --git a/apps/mobile/src/lib/debate-context.tsx b/apps/mobile/src/lib/debate-context.tsx
index bda43d62f..40b013f72 100644
--- a/apps/mobile/src/lib/debate-context.tsx
+++ b/apps/mobile/src/lib/debate-context.tsx
@@ -10,6 +10,7 @@ import {
   type Debate,
   type DebateSettings,
 } from './debates';
+import { keepIfSame } from './keep-if-same';
 
 type Status = 'loading' | 'ready' | 'error';
 
@@ -54,7 +55,8 @@ export function DebateProvider({ children }: { children: ReactNode }) {
     try {
       const next = await fetchDebates(forUser);
       if (owner.current !== forUser || refreshes.current !== request || writes.current !== writesBefore) return;
-      setDebates(next.debates);
+      // Refreshes run on every Debate tab focus; an unchanged list keeps its identity so the tabs do not re-render.
+      setDebates((previous) => keepIfSame(previous, next.debates));
       setCurrentId(next.currentId);
       setStatus('ready');
     } catch (cause) {
diff --git a/apps/mobile/src/lib/i18n.ts b/apps/mobile/src/lib/i18n.ts
index b41fa428b..d8de4c7d3 100644
--- a/apps/mobile/src/lib/i18n.ts
+++ b/apps/mobile/src/lib/i18n.ts
@@ -1,3 +1,11 @@
+// Hermes has no Intl.PluralRules, and without it i18next cannot pick `_one`/`_other` keys
+// and shows the raw key. The polyfill only installs where it is missing, so the web keeps
+// the browser's. It must load before i18next initialises below.
+import '@formatjs/intl-pluralrules/polyfill.js';
+import '@formatjs/intl-pluralrules/locale-data/en.js';
+import '@formatjs/intl-pluralrules/locale-data/es.js';
+import '@formatjs/intl-pluralrules/locale-data/hu.js';
+
 import { isAppLanguage, type AppLanguage } from '@debatelab/core/languages';
 import { getLocales } from 'expo-localization';
 import i18n from 'i18next';
diff --git a/apps/mobile/src/lib/keep-if-same.ts b/apps/mobile/src/lib/keep-if-same.ts
new file mode 100644
index 000000000..1c14e942e
--- /dev/null
+++ b/apps/mobile/src/lib/keep-if-same.ts
@@ -0,0 +1,4 @@
+/** Focus refreshes usually reread unchanged data; returning the previous value keeps its identity, so nothing re-renders. */
+export function keepIfSame<T>(previous: T, next: T): T {
+  return JSON.stringify(previous) === JSON.stringify(next) ? previous : next;
+}
diff --git a/docs/development.md b/docs/development.md
index a1e306018..f6ba1c2a1 100644
--- a/docs/development.md
+++ b/docs/development.md
@@ -116,20 +116,22 @@ The phone loads the app from a Metro dev server on the VPS over the tailnet. Sta
 
 ```bash
 PREVIEW=~/.claude/skills/tailnet-preview/scripts/preview
-HOST=$(tailscale status --self --json | jq -r .Self.DNSName | sed 's/\.$//')
+HOST=$(tailscale status --self --json | jq -r '.Self.TailscaleIPs[0]')
 cd apps/mobile
 $PREVIEW run 9230 "debatelab mobile expo-go" -- env REACT_NATIVE_PACKAGER_HOSTNAME=$HOST CI=1 npx expo start --port 9230
 ```
 
-`REACT_NATIVE_PACKAGER_HOSTNAME` makes Metro put the tailnet name in the manifest, so Expo Go fetches the bundle from `http://<host>:9230`. The firewall accepts all traffic on `tailscale0`, so the phone reaches that port directly. In Expo Go, enter `exp://<host>:9230` as the URL, or open that link in Safari. `CI=1` stops Expo waiting for keyboard input in the background. To check the server without a phone:
+`REACT_NATIVE_PACKAGER_HOSTNAME` makes Metro put the VPS's tailnet IP in the manifest, so Expo Go fetches the bundle from `http://<ip>:9230`. iOS allows plain HTTP to IP addresses on local networks, and the firewall accepts all traffic on `tailscale0`, so the phone reaches that port directly. In Expo Go, enter `exp://<ip>:9230` as the URL, or open that link in Safari. `CI=1` stops Expo waiting for keyboard input in the background. To check the server without a phone:
 
 ```bash
 curl -s -H 'expo-platform: ios' http://127.0.0.1:9230/ | jq -r .launchAsset.url
 ```
 
-The URL must start with `http://<host>:9230/`.
+The URL must start with `http://<ip>:9230/`.
 
-If iOS refuses the plain-HTTP bundle URL because of App Transport Security, there are two fallbacks. Set `REACT_NATIVE_PACKAGER_HOSTNAME` to the tailnet IP (`tailscale status --self --json | jq -r '.Self.TailscaleIPs[0]'`), since iOS allows plain HTTP to IP addresses on local networks. Or use the HTTPS URL that `run` publishes (`https://<host>:91xx`) by also setting `EXPO_PACKAGER_PROXY_URL=https://<host>:91xx`, so the manifest points at the HTTPS proxy.
+Do not use the MagicDNS name (`codex-remote.<tailnet>.ts.net`) as the hostname. The VPS cannot resolve its own MagicDNS name, and Metro's CLI looks the hostname up while it runs: it crashes with `getaddrinfo ENOTFOUND` a few seconds after the phone connects. If you need HTTPS, use the URL that `run` publishes (`https://<name>:91xx`) by also setting `EXPO_PACKAGER_PROXY_URL=https://<name>:91xx`, so the manifest points at the HTTPS proxy.
+
+To sign the CLI in to an Expo account, run `npx expo login` from `apps/mobile`, where the Expo CLI is installed. Its `--browser` and `--sso` options hand the login back to a callback on `localhost` on the VPS, so a login opened in a laptop's browser cannot finish. Use the username and password prompt (`-u <name>`, then the password on stdin with `-p -`).
 
 Stop it with `$PREVIEW down "debatelab mobile expo-go"` when you are done.
 
diff --git a/package-lock.json b/package-lock.json
index 1cb4e067a..51deaa67b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -120,6 +120,7 @@
       "dependencies": {
         "@debatelab/core": "*",
         "@expo-google-fonts/inter": "^0.4.2",
+        "@formatjs/intl-pluralrules": "^6.3.15",
         "@react-native-async-storage/async-storage": "2.2.0",
         "@supabase/supabase-js": "^2.49.1",
         "aes-js": "^3.1.2",
@@ -3761,6 +3762,37 @@
       "integrity": "sha512-HpCo8tmWzLVad5s2d19EhAz5zqrrQ6s69qd6moPMQvkOuSwDT1YgRfWSVuc4ennqrgv3OHppiOGMQ7oC13yIww==",
       "license": "MIT"
     },
+    "node_modules/@formatjs/bigdecimal": {
+      "version": "0.2.7",
+      "resolved": "https://registry.npmjs.org/@formatjs/bigdecimal/-/bigdecimal-0.2.7.tgz",
+      "integrity": "sha512-B4+XY/e4u5v261r3a37Kq2ax91gPZSKGyVpx8X5dygAggLlUz+6MeBpmAhaBFGB8WQ4JB1qD+QtKHk9aJkEb9Q==",
+      "license": "MIT"
+    },
+    "node_modules/@formatjs/fast-memoize": {
+      "version": "3.1.7",
+      "resolved": "https://registry.npmjs.org/@formatjs/fast-memoize/-/fast-memoize-3.1.7.tgz",
+      "integrity": "sha512-zXfhLpvA6T7+efdt9JLbBwZ00tT7NsBMDVnDu8rpHeNNv8KfRZAMo2gkG0k9lK/Nzc//3kJ9pImsfuJxk3KhUA==",
+      "license": "MIT"
+    },
+    "node_modules/@formatjs/intl-localematcher": {
+      "version": "0.9.0",
+      "resolved": "https://registry.npmjs.org/@formatjs/intl-localematcher/-/intl-localematcher-0.9.0.tgz",
+      "integrity": "sha512-Z7TD3ssNry1Av1dVDoq/mzpxGyxqWwU0ClWEo+BB3k0JQTeQvUGmeK9WZGYvlqStS0UqkaKXk3dfjsb6NaHAxw==",
+      "license": "MIT",
+      "dependencies": {
+        "@formatjs/fast-memoize": "3.1.7"
+      }
+    },
+    "node_modules/@formatjs/intl-pluralrules": {
+      "version": "6.3.15",
+      "resolved": "https://registry.npmjs.org/@formatjs/intl-pluralrules/-/intl-pluralrules-6.3.15.tgz",
+      "integrity": "sha512-/K6Up6SrvLcTP5mWVHp58A9Uk7I4jYbDYqtYdgKDeSY1HG0bhBMS4eVtqK2nFx8mWWdcHbt9ZqHBcCto573PNg==",
+      "license": "MIT",
+      "dependencies": {
+        "@formatjs/bigdecimal": "0.2.7",
+        "@formatjs/intl-localematcher": "0.9.0"
+      }
+    },
     "node_modules/@gilbarbara/deep-equal": {
       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/@gilbarbara/deep-equal/-/deep-equal-0.3.1.tgz",