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diff --git a/packages/meshbay-hub/src/meshbay_hub/static/whatsapp-sync-settings.js b/packages/meshbay-hub/src/meshbay_hub/static/whatsapp-sync-settings.js
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+++ b/packages/meshbay-hub/src/meshbay_hub/static/whatsapp-sync-settings.js
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+// The WhatsApp section of the Android Sync page, on the Android application
+// only (docs/MESHBAY_DESIGN.md §9.13). Loaded on demand: no other client has
+// it. WhatsApp's chats are only ever in its own encrypted backups, which this
+// copies for a restore onto a new phone; its media too, if asked.
+
+import { html, useState, useEffect, useCallback } from './vendor/htm-preact.js';
+import { t } from './i18n.js';
+import { ask } from './ask.js';
+import * as platform from './platform.js';
+import { subscribeWhatsApp, runWhatsAppSync } from './drive-sync.js';
+import { failureText } from './phone-sync.js';
+
+function stateLine(st, status) {
+  switch (st.phase) {
+    case 'waiting_wifi': return t('photosync.state_waiting_wifi');
+    case 'connecting': return t('photosync.state_connecting');
+    case 'sending': return t('photosync.state_sending', { done: st.done, total: st.total });
+    case 'offline': return t('photosync.state_offline');
+    case 'interrupted': return t('photosync.state_interrupted');
+    case 'up_to_date': return t('photosync.state_up_to_date');
+    default: return status && status.lastCompleted ? t('photosync.state_up_to_date') : '';
+  }
+}
+
+export function WhatsAppSyncSection({ destination }) {
+  const sync = platform.whatsappSync;
+  const [status, setStatus] = useState(null);
+  const [run, setRun] = useState({ phase: 'idle' });
+  const [busy, setBusy] = useState(false);
+  const [error, setError] = useState('');
+
+  const refresh = useCallback(() => sync.status().then(setStatus).catch(() => {}), [sync]);
+  useEffect(() => { refresh(); }, [refresh]);
+  useEffect(() => subscribeWhatsApp((st) => {
+    setRun(st);
+    if (st.phase !== 'sending' && st.phase !== 'connecting') refresh();
+  }), [refresh]);
+
+  if (!status) return null;
+  const chosen = (status.folders || []).length > 0;
+  const media = Boolean(status.options && status.options.media);
+  const running = run.phase === 'sending' || run.phase === 'connecting';
+
+  const act = async (fn) => {
+    setBusy(true);
+    setError('');
+    try {
+      const next = await fn();
+      if (next) setStatus(next);
+    } catch (e) {
+      setError(/Refused: not_whatsapp/.test(e.message || '') ? t('whatsappsync.refused') : e.message);
+    } finally {
+      setBusy(false);
+    }
+  };
+
+  const turnOn = (withMedia) => act(async () => {
+    const next = await sync.configure({ media: withMedia });
+    runWhatsAppSync({ force: true });
+    return next;
+  });
+
+  const backUpNow = () => act(async () => {
+    if (!status.unmetered && !await ask(t('drivesync.metered_confirm'))) return null;
+    await runWhatsAppSync({ force: true, metered: !status.unmetered });
+    return null;
+  });
+
+  return html`
+    <div class="settings-section">
+      <h3 class="settings-heading">${t('whatsappsync.heading')}</h3>
+      ${!status.on && html`<p class="settings-hint">${t('whatsappsync.intro')}</p>`}
+      ${!destination && html`<p class="settings-hint">${t('androidsync.dest_needed')}</p>`}
+      ${destination && html`
+        <div class="settings-row">
+          <span class="settings-label settings-name">
+            ${chosen ? t('whatsappsync.folder_chosen') : t('whatsappsync.folder_needed')}
+          </span>
+          <button class="btn-secondary" disabled=${busy}
+            onClick=${() => act(() => sync.chooseFolder())}>
+            ${chosen ? t('photosync.change') : t('whatsappsync.folder_choose')}</button>
+        </div>
+        ${!chosen && html`<p class="settings-hint">${t('whatsappsync.folder_hint')}</p>`}
+        <label class="settings-choice">
+          <input type="checkbox" checked=${media} disabled=${busy || !chosen}
+            onChange=${() => (status.on ? turnOn(!media)
+              : act(async () => ({ ...status, options: { media: !media } })))} />
+          <span class="settings-name">
+            <strong>${t('whatsappsync.media')}</strong>
+            <span class="settings-hint">${t('whatsappsync.media_hint')}</span>
+          </span>
+        </label>
+      `}
+      ${destination && chosen && !status.on && html`
+        <button class="admin-btn" disabled=${busy}
+          onClick=${() => turnOn(media)}>${t('phonesync.turn_on')}</button>
+      `}
+      ${destination && status.on && html`
+        <div class="settings-row" style="margin-top:8px">
+          <span class="settings-label settings-name">
+            ${t('phonesync.summary', { group: destination.groupName, dir: status.dir })}
+          </span>
+        </div>
+        <p class="settings-hint">
+          ${t('drivesync.sent_total', { n: status.sent })}
+          ${' · '}
+          ${status.lastCompleted
+            ? t('photosync.last_run', { when: new Date(status.lastCompleted).toLocaleString() })
+            : t('photosync.never')}
+        </p>
+        ${status.failure
+          ? html`<p class="error-msg">${failureText(status.failure)}</p>`
+          : stateLine(run, status) && html`<p class="settings-hint">${stateLine(run, status)}</p>`}
+        <p class="settings-hint">${t('whatsappsync.restore_hint')}</p>
+        <div class="settings-row" style="gap:8px; justify-content:flex-start; flex-wrap:wrap">
+          <button class="admin-btn" disabled=${running || busy || !chosen}
+            onClick=${backUpNow}>${t('photosync.now')}</button>
+          <button class="btn-secondary" disabled=${busy}
+            onClick=${() => act(() => sync.configure(null))}>${t('photosync.turn_off')}</button>
+        </div>
+      `}
+      ${error && html`<p class="error-msg">${error}</p>`}
+    </div>
+  `;
+}