feat(mobile): wire offline queue enqueue and flush

mobile/src/app/(tabs)/capture.tsx

@@ -22,8 +22,8 @@ export default function CaptureScreen() {
       <Text style={styles.title}>Quick capture</Text>
       <Text style={styles.subtitle}>
         {activeWorkspaceId
-          ? `Create a lightweight mobile draft in ${activeWorkspaceName}. Offline queue wiring comes in a later batch.`
-          : 'Choose a workspace to save this mobile draft. Offline queue wiring comes in a later batch.'}
+          ? `Create a lightweight mobile draft in ${activeWorkspaceName}. If the network fails, this draft is queued and retried automatically.`
+          : 'Choose a workspace to save this mobile draft. Failed saves are queued automatically for retry.'}
       </Text>
       <View style={styles.workspaceRow}>
         {workspaces.map((workspace: MobileWorkspace) => {
@@ -81,7 +81,7 @@ export default function CaptureScreen() {
       </Pressable>
       {saved ? <Text style={styles.saved}>Draft saved to the product backend.</Text> : null}
       <View style={styles.card}>
-        <Text style={styles.cardTitle}>Offline queue readiness</Text>
+        <Text style={styles.cardTitle}>Offline queue is active</Text>
         <Text style={styles.cardBody}>Queue capacity: {OFFLINE_QUEUE_MAX_SIZE} items</Text>
         <Text style={styles.cardBody}>Retry policy: {OFFLINE_QUEUE_MAX_RETRIES} attempts</Text>
       </View>

mobile/src/app/_layout.tsx

@@ -1,7 +1,7 @@
 import { useEffect, useState } from 'react';
 import { Stack } from 'expo-router';
 import { StatusBar } from 'expo-status-bar';
-import { Modal, Pressable, ScrollView, StyleSheet, Text, TextInput, View } from 'react-native';
+import { AppState, Modal, Pressable, ScrollView, StyleSheet, Text, TextInput, View } from 'react-native';
 import { useAuthStore, type AuthState } from '../store/auth-store';
 import { useInboxStore, type InboxState } from '../store/inbox-store';
 import { useNotesStore, type NotesState } from '../store/notes-store';
@@ -9,6 +9,7 @@ import { useWorkspaceStore, type WorkspaceState } from '../store/workspace-store
 import { checkKillSwitch, initPlatform } from '../lib/platform';
 import { getBroadcastClient } from '../lib/broadcast-client';
 import { getSurveyClient } from '../lib/survey-client';
+import { flushNoteQueue, getNoteQueueSize } from '../lib/offline-queue';
 import type { InAppMessage } from '@bytelyst/broadcast-client';
 import type { ActiveSurvey, Question, QuestionAnswer } from '@bytelyst/survey-client';
 import { colors } from '../theme';
@@ -20,6 +21,10 @@ export default function RootLayout() {
   const [surveyIndex, setSurveyIndex] = useState(0);
   const [surveyAnswers, setSurveyAnswers] = useState<Record<string, QuestionAnswer>>({});
   const [textAnswer, setTextAnswer] = useState('');
+  const [queueStatus, setQueueStatus] = useState<{ pending: number; lastFlushed: number }>({
+    pending: getNoteQueueSize(),
+    lastFlushed: 0,
+  });
 
   const [killSwitchState, setKillSwitchState] = useState<{
     checked: boolean;
@@ -52,6 +57,14 @@ export default function RootLayout() {
     return { type: 'text', value };
   }
 
+  async function flushQueuedNoteMutations(): Promise<void> {
+    const result = await flushNoteQueue().catch(() => ({ flushed: 0, failed: getNoteQueueSize() }));
+    setQueueStatus({
+      pending: result.failed,
+      lastFlushed: result.flushed,
+    });
+  }
+
   async function loadBroadcasts(): Promise<void> {
     try {
       const { messages } = await getBroadcastClient().listMessages();
@@ -86,6 +99,7 @@ export default function RootLayout() {
     void hydrateNotes();
     void hydrateWorkspaces();
     void hydrateInbox();
+    void flushQueuedNoteMutations();
     void loadBroadcasts();
     void loadSurvey();
 
@@ -97,9 +111,16 @@ export default function RootLayout() {
       void loadSurvey();
     }, 10 * 60_000);
 
+    const appStateSubscription = AppState.addEventListener('change', (nextState) => {
+      if (nextState === 'active') {
+        void flushQueuedNoteMutations();
+      }
+    });
+
     return () => {
       clearInterval(broadcastTimer);
       clearInterval(surveyTimer);
+      appStateSubscription.remove();
     };
   }, [bootstrapAuth, hydrateInbox, hydrateNotes, hydrateWorkspaces]);
 
@@ -213,6 +234,14 @@ export default function RootLayout() {
         </View>
       ) : null}
 
+      {queueStatus.pending > 0 || queueStatus.lastFlushed > 0 ? (
+        <View style={styles.queueStatusCard}>
+          <Text style={styles.queueStatusTitle}>Offline sync</Text>
+          <Text style={styles.queueStatusBody}>Pending actions: {queueStatus.pending}</Text>
+          <Text style={styles.queueStatusBody}>Flushed on last attempt: {queueStatus.lastFlushed}</Text>
+        </View>
+      ) : null}
+
       {activeSurvey && !surveyStarted ? (
         <View style={styles.surveyPrompt}>
           <Text style={styles.surveyPromptText}>{activeSurvey.title}</Text>
@@ -303,6 +332,24 @@ const styles = StyleSheet.create({
     flex: 1,
     backgroundColor: colors.bgCanvas,
   },
+  queueStatusCard: {
+    marginHorizontal: 12,
+    borderRadius: 12,
+    borderWidth: 1,
+    borderColor: colors.borderDefault,
+    backgroundColor: colors.surfaceCard,
+    padding: 10,
+    gap: 4,
+  },
+  queueStatusTitle: {
+    color: colors.textPrimary,
+    fontWeight: '700',
+    fontSize: 13,
+  },
+  queueStatusBody: {
+    color: colors.textSecondary,
+    fontSize: 12,
+  },
   bannerSection: {
     paddingHorizontal: 12,
     paddingTop: 10,

mobile/src/lib/offline-queue.ts

@@ -1,5 +1,6 @@
 import { createOfflineQueue } from '@bytelyst/offline-queue';
 import { PRODUCT_ID } from '../api/config';
+import { getApiClient } from '../api/client';
 import { mmkvStorage } from '../store/mmkv-storage';
 
 export const OFFLINE_QUEUE_MAX_RETRIES = 5;
@@ -14,3 +15,56 @@ export const noteOfflineQueue = createOfflineQueue({
   maxRetries: OFFLINE_QUEUE_MAX_RETRIES,
   maxQueueSize: OFFLINE_QUEUE_MAX_SIZE,
 });
+
+export function getNoteQueueSize(): number {
+  return noteOfflineQueue.length();
+}
+
+export function enqueueNoteCreate(input: {
+  id: string;
+  workspaceId: string;
+  title: string;
+  body: string;
+  tags?: string[];
+  links?: string[];
+}): void {
+  noteOfflineQueue.enqueue({
+    id: input.id,
+    action: 'create',
+    path: '/notes',
+    payload: {
+      id: input.id,
+      workspaceId: input.workspaceId,
+      title: input.title,
+      body: input.body,
+      tags: input.tags ?? [],
+      links: input.links ?? [],
+    },
+  });
+}
+
+export function enqueueNoteUpdate(input: {
+  id: string;
+  workspaceId: string;
+  title: string;
+  body: string;
+}): void {
+  noteOfflineQueue.enqueue({
+    id: input.id,
+    action: 'update',
+    path: `/notes/${input.id}?workspaceId=${encodeURIComponent(input.workspaceId)}`,
+    payload: {
+      title: input.title,
+      body: input.body,
+    },
+  });
+}
+
+export async function flushNoteQueue(): Promise<{ flushed: number; failed: number }> {
+  return noteOfflineQueue.flush(async (action, path, payload) => {
+    await getApiClient().fetch(path, {
+      method: action === 'create' ? 'POST' : 'PATCH',
+      body: JSON.stringify(payload),
+    });
+  });
+}

mobile/src/store/notes-store.test.ts

@@ -4,6 +4,8 @@ const listNotesMock = vi.fn();
 const getNoteMock = vi.fn();
 const createNoteMock = vi.fn();
 const updateNoteMock = vi.fn();
+const enqueueNoteCreateMock = vi.fn();
+const enqueueNoteUpdateMock = vi.fn();
 
 vi.mock('../api/notes', () => ({
   listNotes: (...args: unknown[]) => listNotesMock(...args),
@@ -12,6 +14,11 @@ vi.mock('../api/notes', () => ({
   updateNote: (...args: unknown[]) => updateNoteMock(...args),
 }));
 
+vi.mock('../lib/offline-queue', () => ({
+  enqueueNoteCreate: (...args: unknown[]) => enqueueNoteCreateMock(...args),
+  enqueueNoteUpdate: (...args: unknown[]) => enqueueNoteUpdateMock(...args),
+}));
+
 import { useNotesStore } from './notes-store';
 
 function resetStore() {
@@ -74,6 +81,14 @@ describe('useNotesStore', () => {
     expect(createNoteMock).not.toHaveBeenCalled();
   });
 
+  it('saveDraft enqueues create when persistence fails', async () => {
+    createNoteMock.mockRejectedValueOnce(new Error('offline'));
+    const ok = await useNotesStore.getState().saveDraft('ws-1', 'Queued', 'Body');
+    expect(ok).toBe(true);
+    expect(enqueueNoteCreateMock).toHaveBeenCalledTimes(1);
+    expect(useNotesStore.getState().notes[0].title).toBe('Queued');
+  });
+
   it('updateNote persists and updates state', async () => {
     useNotesStore.setState({ notes: [fakeNote] });
     const updated = { ...fakeNote, title: 'Updated' };
@@ -86,4 +101,12 @@ describe('useNotesStore', () => {
     await useNotesStore.getState().updateNote('missing', 'Title', 'Body');
     expect(updateNoteMock).not.toHaveBeenCalled();
   });
+
+  it('updateNote enqueues update when persistence fails', async () => {
+    useNotesStore.setState({ notes: [fakeNote] });
+    updateNoteMock.mockRejectedValueOnce(new Error('offline'));
+    await useNotesStore.getState().updateNote('n1', 'Updated offline', 'Body');
+    expect(enqueueNoteUpdateMock).toHaveBeenCalledTimes(1);
+    expect(useNotesStore.getState().notes[0].title).toBe('Updated offline');
+  });
 });

mobile/src/store/notes-store.ts

@@ -1,5 +1,18 @@
 import { create } from 'zustand';
 import { createNote as persistNewNote, getNote, listNotes, updateNote as persistNote, type MobileNote } from '../api/notes';
+import { enqueueNoteCreate, enqueueNoteUpdate } from '../lib/offline-queue';
+
+function createOfflineNoteId(): string {
+  const randomUUID = globalThis.crypto && typeof globalThis.crypto.randomUUID === 'function'
+    ? globalThis.crypto.randomUUID.bind(globalThis.crypto)
+    : null;
+
+  if (randomUUID) {
+    return randomUUID();
+  }
+
+  return `offline-${Date.now()}`;
+}
 
 export type NotesState = {
   notes: MobileNote[];
@@ -37,12 +50,38 @@ export const useNotesStore = create<NotesState>((set, get) => ({
     }
 
     set({ isLoading: true });
-    const created = await persistNewNote(workspaceId, title, body);
-    set({
-      notes: [created, ...get().notes],
-      selectedNote: created,
-      isLoading: false,
-    });
+    try {
+      const created = await persistNewNote(workspaceId, title, body);
+      set({
+        notes: [created, ...get().notes],
+        selectedNote: created,
+        isLoading: false,
+      });
+    } catch {
+      const queuedNote: MobileNote = {
+        id: createOfflineNoteId(),
+        workspaceId,
+        workspaceName: workspaceId,
+        title: title.trim() || 'Untitled draft',
+        body,
+        status: 'draft',
+        updatedAt: new Date().toISOString(),
+      };
+
+      enqueueNoteCreate({
+        id: queuedNote.id,
+        workspaceId,
+        title: queuedNote.title,
+        body,
+      });
+
+      set({
+        notes: [queuedNote, ...get().notes],
+        selectedNote: queuedNote,
+        isLoading: false,
+      });
+    }
+
     return true;
   },
   async updateNote(id: string, title: string, body: string) {
@@ -69,12 +108,34 @@ export const useNotesStore = create<NotesState>((set, get) => ({
     }
 
     set({ isLoading: true });
-    const updated = await persistNote(id, current.workspaceId, nextTitle, body);
+    try {
+      const updated = await persistNote(id, current.workspaceId, nextTitle, body);
 
-    set({
-      notes: get().notes.map((note: MobileNote) => (note.id === id ? updated : note)),
-      selectedNote: updated,
-      isLoading: false,
-    });
+      set({
+        notes: get().notes.map((note: MobileNote) => (note.id === id ? updated : note)),
+        selectedNote: updated,
+        isLoading: false,
+      });
+    } catch {
+      const updated: MobileNote = {
+        ...current,
+        title: nextTitle,
+        body,
+        updatedAt: new Date().toISOString(),
+      };
+
+      enqueueNoteUpdate({
+        id,
+        workspaceId: current.workspaceId,
+        title: nextTitle,
+        body,
+      });
+
+      set({
+        notes: get().notes.map((note: MobileNote) => (note.id === id ? updated : note)),
+        selectedNote: updated,
+        isLoading: false,
+      });
+    }
   },
 }));