fix(mobile): Apple App Store compliance fixes

- Remove unused `fetch` from UIBackgroundModes (Guideline 2.5.4)
- Add iOS privacy manifest configuration for required reason APIs
- Add Privacy Policy and Terms of Service links to ProfileScreen
- Add account deletion capability (Guideline 5.1.1(v))
- Remove unused Switch import from ProfileScreen
- Replace emoji icons with Ionicons in UploadScreen and FilesScreen
- Add app version display to ProfileScreen

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

mobile/app.json

@@ -22,7 +22,7 @@
         "NSCameraUsageDescription": "DocuElevate uses the camera to scan QR codes for login and to capture documents for upload.",
         "NSPhotoLibraryUsageDescription": "DocuElevate accesses your photo library to select documents for upload.",
         "NSPhotoLibraryAddUsageDescription": "DocuElevate saves scanned documents to your photo library.",
-        "UIBackgroundModes": ["fetch", "remote-notification"],
+        "UIBackgroundModes": ["remote-notification"],
         "ITSAppUsesNonExemptEncryption": false,
         "LSSupportsOpeningDocumentsInPlace": true,
         "CFBundleDocumentTypes": [
@@ -86,7 +86,29 @@
         "expo-build-properties",
         {
           "ios": {
-            "buildReactNativeFromSource": true
+            "buildReactNativeFromSource": true,
+            "privacyManifests": {
+              "NSPrivacyAccessedAPITypes": [
+                {
+                  "NSPrivacyAccessedAPIType": "NSPrivacyAccessedAPICategoryUserDefaults",
+                  "NSPrivacyAccessedAPITypeReasons": ["CA92.1"]
+                },
+                {
+                  "NSPrivacyAccessedAPIType": "NSPrivacyAccessedAPICategoryFileTimestamp",
+                  "NSPrivacyAccessedAPITypeReasons": ["C617.1"]
+                },
+                {
+                  "NSPrivacyAccessedAPIType": "NSPrivacyAccessedAPICategoryDiskSpace",
+                  "NSPrivacyAccessedAPITypeReasons": ["E174.1"]
+                },
+                {
+                  "NSPrivacyAccessedAPIType": "NSPrivacyAccessedAPICategorySystemBootTime",
+                  "NSPrivacyAccessedAPITypeReasons": ["35F9.1"]
+                }
+              ],
+              "NSPrivacyCollectedDataTypes": [],
+              "NSPrivacyTracking": false
+            }
           }
         }
       ],