diff --git a/src/api/client.ts b/src/api/client.ts
index 870330d..f3acdb3 100644
--- a/src/api/client.ts
+++ b/src/api/client.ts
@@ -20,6 +20,21 @@ export class ApiError extends Error {
   }
 }
 
+/** Error de red/tiempo (sin respuesta del servidor). `timedOut` indica timeout. */
+export class NetworkError extends Error {
+  constructor(
+    message: string,
+    public timedOut = false,
+  ) {
+    super(message);
+    this.name = 'NetworkError';
+  }
+}
+
+/** Timeout por defecto: peticiones JSON vs. subida de ficheros (multipart). */
+const DEFAULT_TIMEOUT_MS = 30_000;
+const UPLOAD_TIMEOUT_MS = 120_000;
+
 type TokenGetter = () => string | null;
 
 let getToken: TokenGetter = () => null;
@@ -45,6 +60,8 @@ export interface RequestOptions {
   /** Si false, no adjunta el token (p.ej. /login). Por defecto true. */
   auth?: boolean;
   signal?: AbortSignal;
+  /** Milisegundos hasta abortar por timeout. Por defecto 30s (120s si hay `form`). */
+  timeoutMs?: number;
 }
 
 function buildUrl(path: string, query?: RequestOptions['query']): string {
@@ -85,7 +102,39 @@ export async function request<T>(path: string, opts: RequestOptions = {}): Promi
     body = JSON.stringify(json);
   }
 
-  const res = await fetch(buildUrl(path, query), { method, headers, body, signal });
+  // Timeout con AbortController, combinado con la señal externa si la hay.
+  const timeoutMs = opts.timeoutMs ?? (form ? UPLOAD_TIMEOUT_MS : DEFAULT_TIMEOUT_MS);
+  const controller = new AbortController();
+  const timedOut = { value: false };
+  const timer = setTimeout(() => {
+    timedOut.value = true;
+    controller.abort();
+  }, timeoutMs);
+  if (signal) {
+    if (signal.aborted) controller.abort();
+    else signal.addEventListener('abort', () => controller.abort(), { once: true });
+  }
+
+  let res: Response;
+  try {
+    res = await fetch(buildUrl(path, query), {
+      method,
+      headers,
+      body,
+      signal: controller.signal,
+    });
+  } catch (e) {
+    if (timedOut.value) {
+      throw new NetworkError(`Tiempo de espera agotado (${timeoutMs / 1000}s)`, true);
+    }
+    // Abort externo → propaga tal cual; resto → error de red genérico.
+    if (signal?.aborted) throw e;
+    throw new NetworkError(
+      e instanceof Error ? `Error de red: ${e.message}` : 'Error de red',
+    );
+  } finally {
+    clearTimeout(timer);
+  }
 
   if (res.status === 401 && auth) {
     onUnauthorized?.();
diff --git a/src/screens/ProjectsScreen.tsx b/src/screens/ProjectsScreen.tsx
index 6ca5915..54f8a38 100644
--- a/src/screens/ProjectsScreen.tsx
+++ b/src/screens/ProjectsScreen.tsx
@@ -12,9 +12,9 @@ import {
 import * as api from '../api/endpoints';
 import { Project } from '../api/types';
 import { useSession } from '../auth/session';
-import { getCursor, getProjects, saveProjectList, setActiveProjectId } from '../db/repositories';
+import { getProjects, saveProjectList, setActiveProjectId } from '../db/repositories';
 import { isOnline } from '../net/connectivity';
-import { initialPull, runSync } from '../sync/engine';
+import { runSync } from '../sync/engine';
 import { RootStackParamList } from '../navigation/types';
 
 type Props = NativeStackScreenProps<RootStackParamList, 'Projects'>;
@@ -57,12 +57,9 @@ export function ProjectsScreen({ navigation }: Props) {
       setOpening(p.id);
       try {
         await setActiveProjectId(p.id);
-        const online = await isOnline();
-        if (online) {
-          const cursor = await getCursor(p.id);
-          if (cursor) await runSync(p.id);
-          else await initialPull(p.id);
-        }
+        // runSync ya resuelve ambos casos: sin cursor baja el snapshot completo,
+        // con cursor baja el delta (y vacía primero el outbox, vacío en la 1ª vez).
+        if (await isOnline()) await runSync(p.id);
         navigation.navigate('ProjectDetail', { projectId: p.id, name: p.name });
       } finally {
         setOpening(null);
diff --git a/src/sync/engine.ts b/src/sync/engine.ts
index 2da12d1..72979eb 100644
--- a/src/sync/engine.ts
+++ b/src/sync/engine.ts
@@ -223,9 +223,3 @@ export async function runSync(projectId: number): Promise<SyncReport> {
 
   return report;
 }
-
-/** Primera sincronización: snapshot completo (sin cursor). */
-export async function initialPull(projectId: number): Promise<void> {
-  const bundle = await getBundle(projectId);
-  await applyBundle(bundle);
-}
diff --git a/src/sync/mutations.ts b/src/sync/mutations.ts
index faa2ef7..9cf4081 100644
--- a/src/sync/mutations.ts
+++ b/src/sync/mutations.ts
@@ -16,17 +16,6 @@ import {
   IssueType,
 } from '../api/types';
 
-// ----- progress (append-only en servidor) -----
-
-export function recordProgressUpdate(input: {
-  phase_id: number;
-  progress: number;
-  comment?: string;
-  location?: { lat: number; lng: number };
-}): Promise<string> {
-  return enqueueOperation('progress_update', 'create', { ...input });
-}
-
 // ----- feature.update (editable, last-write-wins) -----
 
 export async function updateFeature(input: {