diff --git a/mobile/app/_layout.jsx b/mobile/app/_layout.tsx
similarity index 100%
rename from mobile/app/_layout.jsx
rename to mobile/app/_layout.tsx
diff --git a/mobile/app/index.jsx b/mobile/app/index.tsx
similarity index 100%
rename from mobile/app/index.jsx
rename to mobile/app/index.tsx
diff --git a/mobile/context/AuthContext.jsx b/mobile/context/AuthContext.jsx
deleted file mode 100644
index e8cfcb3..0000000
--- a/mobile/context/AuthContext.jsx
+++ /dev/null
@@ -1,16 +0,0 @@
-import { createContext, useCallback, useContext, useMemo, useState } from 'react';
-
-const AuthContext = createContext(null);
-
-export function AuthProvider({ children }) {
-
-  return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>;
-}
-
-export function useAuth() {
-  const ctx = useContext(AuthContext);
-  if (!ctx) {
-    throw new Error('useAuth must be used within an AuthProvider');
-  }
-  return ctx;
-}
\ No newline at end of file
diff --git a/mobile/context/AuthContext.tsx b/mobile/context/AuthContext.tsx
new file mode 100644
index 0000000..ea8b51a
--- /dev/null
+++ b/mobile/context/AuthContext.tsx
@@ -0,0 +1,27 @@
+import { createContext, useCallback, useContext, useMemo, useState } from 'react';
+import type { ReactNode } from 'react';
+
+export type User = {
+};
+
+type AuthContextValue = {
+  user: User | null;
+};
+
+const AuthContext = createContext<AuthContextValue | null>(null);
+
+export function AuthProvider({ children }: { children: ReactNode }) {
+  const [user, setUser] = useState<User | null>(null);
+
+  const value = useMemo(() => ({ user }), [user]);
+
+  return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>;
+}
+
+export function useAuth(): AuthContextValue {
+  const ctx = useContext(AuthContext);
+  if (!ctx) {
+    throw new Error('useAuth must be used within an AuthProvider');
+  }
+  return ctx;
+}
\ No newline at end of file
diff --git a/mobile/package-lock.json b/mobile/package-lock.json
index 5ac5f8f..7e9f98b 100644
--- a/mobile/package-lock.json
+++ b/mobile/package-lock.json
@@ -10,10 +10,12 @@
       "dependencies": {
         "expo": "~57.0.8",
         "expo-constants": "~57.0.17",
+        "expo-file-system": "~57.0.6",
         "expo-linking": "~57.0.9",
         "expo-router": "~57.0.20",
         "expo-status-bar": "~57.0.1",
         "react": "19.2.3",
+        "react-dom": "19.2.3",
         "react-native": "0.86.0",
         "react-native-safe-area-context": "~5.7.0",
         "react-native-screens": "~4.26.0"
@@ -3495,6 +3497,16 @@
         "react-native": "*"
       }
     },
+    "node_modules/expo-file-system": {
+      "version": "57.0.6",
+      "resolved": "https://registry.npmjs.org/expo-file-system/-/expo-file-system-57.0.6.tgz",
+      "integrity": "sha512-pm8PMYEW6BnVOCBJ7df9FcDmQtE1tqImuYphlfYe1ipQRLYtdCayRczJcbKIsnB3mqEyp4gC2gWmMbsAsAOjVg==",
+      "license": "MIT",
+      "peerDependencies": {
+        "expo": "*",
+        "react-native": "*"
+      }
+    },
     "node_modules/expo-font": {
       "version": "57.0.3",
       "resolved": "https://registry.npmjs.org/expo-font/-/expo-font-57.0.3.tgz",
@@ -4052,16 +4064,6 @@
         "react-native": "*"
       }
     },
-    "node_modules/expo/node_modules/expo-file-system": {
-      "version": "57.0.6",
-      "resolved": "https://registry.npmjs.org/expo-file-system/-/expo-file-system-57.0.6.tgz",
-      "integrity": "sha512-pm8PMYEW6BnVOCBJ7df9FcDmQtE1tqImuYphlfYe1ipQRLYtdCayRczJcbKIsnB3mqEyp4gC2gWmMbsAsAOjVg==",
-      "license": "MIT",
-      "peerDependencies": {
-        "expo": "*",
-        "react-native": "*"
-      }
-    },
     "node_modules/expo/node_modules/expo-keep-awake": {
       "version": "57.0.1",
       "resolved": "https://registry.npmjs.org/expo-keep-awake/-/expo-keep-awake-57.0.1.tgz",
@@ -6049,16 +6051,15 @@
       }
     },
     "node_modules/react-dom": {
-      "version": "19.2.8",
-      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.2.8.tgz",
-      "integrity": "sha512-rVprimfGBG3DR+Tq0IQG2DT5PxKth1WIGDmj5yPmlzr4YBe7uyE+Du4oVqTDXZSHGGGXRtTJEGSSePyQCMBglQ==",
+      "version": "19.2.3",
+      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.2.3.tgz",
+      "integrity": "sha512-yELu4WmLPw5Mr/lmeEpox5rw3RETacE++JgHqQzd2dg+YbJuat3jH4ingc+WPZhxaoFzdv9y33G+F7Nl5O0GBg==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "scheduler": "^0.27.0"
       },
       "peerDependencies": {
-        "react": "^19.2.8"
+        "react": "^19.2.3"
       }
     },
     "node_modules/react-fast-compare": {
diff --git a/mobile/package.json b/mobile/package.json
index c5bb63c..85dbbd0 100644
--- a/mobile/package.json
+++ b/mobile/package.json
@@ -5,10 +5,12 @@
   "dependencies": {
     "expo": "~57.0.8",
     "expo-constants": "~57.0.17",
+    "expo-file-system": "~57.0.6",
     "expo-linking": "~57.0.9",
     "expo-router": "~57.0.20",
     "expo-status-bar": "~57.0.1",
     "react": "19.2.3",
+    "react-dom": "19.2.3",
     "react-native": "0.86.0",
     "react-native-safe-area-context": "~5.7.0",
     "react-native-screens": "~4.26.0"
diff --git a/mobile/services/safDirectory.ts b/mobile/services/safDirectory.ts
new file mode 100644
index 0000000..5843146
--- /dev/null
+++ b/mobile/services/safDirectory.ts
@@ -0,0 +1,129 @@
+import { Directory, File, Paths } from 'expo-file-system';
+
+export type Folder = {
+  uri: string;
+  name: string;
+  isDirectory: true;
+  exists?: boolean;
+};
+
+export type FileEntry = {
+  uri: string;
+  name: string;
+  isDirectory: false;
+  extension: string;
+  exists: boolean;
+  size: number;
+  type: string;
+  lastModified: number | null;
+};
+
+export type DirectoryEntry = Folder | FileEntry;
+
+export type FolderInfo = {
+  uri: string;
+  name: string;
+  exists: boolean;
+};
+
+type PickDirectoryOptions = {
+  recursive?: boolean;
+  includeRoot?: boolean;
+};
+
+export async function pickDirectory(initialUri?: string): Promise<Folder | null> {
+  try {
+    const directory = await Directory.pickDirectoryAsync(initialUri);
+    if (!directory || !directory.uri) return null;
+    return toFolder({ uri: directory.uri, name: directory.name, exists: directory.exists });
+  } catch {
+    return null;
+  }
+}
+
+export function listDirectory(directoryUri: string): DirectoryEntry[] {
+  const directory = new Directory(directoryUri);
+  if (!directory.exists) return [];
+  try {
+    return directory.list().map(toEntry);
+  } catch {
+    return [];
+  }
+}
+
+export function listFolders(directoryUri: string, options: PickDirectoryOptions = {}): Folder[] {
+  const { recursive = false, includeRoot = false } = options;
+  if (!recursive) {
+    return listDirectory(directoryUri).filter((entry): entry is Folder => entry.isDirectory);
+  }
+
+  const result: Folder[] = [];
+  if (includeRoot) {
+    result.push({ ...getFolderInfo(directoryUri), isDirectory: true });
+  }
+  const visit = (uri: string) => {
+    for (const entry of listDirectory(uri)) {
+      if (entry.isDirectory) {
+        result.push(entry);
+        visit(entry.uri);
+      }
+    }
+  };
+  visit(directoryUri);
+  return result;
+}
+
+export function getFolderInfo(directoryUri: string): FolderInfo {
+  const directory = new Directory(directoryUri);
+  return {
+    uri: directory.uri,
+    name: directory.name,
+    exists: directory.exists,
+  };
+}
+
+export function createDirectory(directoryUri: string, name: string): Folder {
+  const directory = new Directory(Paths.join(directoryUri, name));
+  directory.create({ idempotent: true, intermediates: true });
+  return toFolder({ uri: directory.uri, name: directory.name, exists: directory.exists });
+}
+
+export function fileFromUri(uri: string): FileEntry {
+  const file = new File(uri);
+  return {
+    uri: file.uri,
+    name: file.name,
+    isDirectory: false,
+    extension: file.extension,
+    exists: file.exists,
+    size: file.size,
+    type: file.type,
+    lastModified: file.lastModified,
+  };
+}
+
+function toEntry(item: Directory | File): DirectoryEntry {
+  if (item instanceof Directory) {
+    return toFolder({ uri: item.uri, name: item.name, exists: item.exists });
+  }
+  return {
+    uri: item.uri,
+    name: item.name,
+    isDirectory: false,
+    extension: item.extension,
+    exists: item.exists,
+    size: item.size,
+    type: item.type,
+    lastModified: item.lastModified,
+  };
+}
+
+function toFolder({ uri, name, exists }: { uri: string; name?: string; exists?: boolean }): Folder {
+  const directory = exists === undefined ? new Directory(uri) : null;
+  return {
+    uri,
+    name: name ?? directory?.name ?? Paths.basename(uri),
+    isDirectory: true,
+    exists: exists ?? directory?.exists,
+  };
+}
\ No newline at end of file