Added Google Drive storage location

pubspec.yaml

@@ -44,21 +44,10 @@ dependencies:
   # On-device OCR text recognition
   google_mlkit_text_recognition: ^0.15.0
 
-  # Directory picker for configurable save location.
-  # Pinned below 11.x: file_picker 11.0.0-11.0.3 skip applying the Kotlin
-  # Gradle plugin under AGP 9+ assuming AGP's built-in Kotlin support covers
-  # it, but that isn't actually wired up yet for library modules in this
-  # Flutter/AGP combo, so FilePickerPlugin.kt never gets compiled. 10.3.11
-  # still compiles against compileSdk 36 (matches flutter.compileSdkVersion,
-  # satisfying flutter_plugin_android_lifecycle's requirement) but applies
-  # its own Kotlin plugin unconditionally, which works. (10.3.11 itself is
-  # retracted on pub.dev, hence pinning to 10.3.10.)
-  file_picker: 10.3.10
-
-  # App sandbox paths (default save location, temp files)
+  # App sandbox paths (local offline staging area)
   path_provider: ^2.1.5
 
-  # Persist small settings like chosen save directory
+  # Persist small settings (Drive connection state, last synced time)
   shared_preferences: ^2.3.4
 
   # Unique IDs for vehicles/fuel entries
@@ -70,6 +59,18 @@ dependencies:
   # Path joining/manipulation helpers
   path: ^1.9.0
 
+  # Google OAuth sign-in for Drive access
+  google_sign_in: ^7.1.1
+
+  # Google Drive API client
+  googleapis: ^14.0.0
+
+  # HTTP client interface (for the authenticated client we hand to DriveApi)
+  http: ^1.2.2
+
+  # Detect connectivity changes to trigger background sync
+  connectivity_plus: ^6.1.0
+
 dev_dependencies:
   flutter_test:
     sdk: flutter