feat(mobile): Allow users to set profile picture from asset viewer (#25517)

* init

* fix

* styling

* temporary workaround for 500 error

**Root cause:**
The autogenerated Dart OpenAPI client (`UsersApi.createProfileImage()`) had two issues:
1. It set `Content-Type: multipart/form-data` without a boundary, which overrode the correct header that Dart's `MultipartRequest` would set (`multipart/form-data; boundary=...`).
2. It added the file to both `mp.fields` and `mp.files`, creating a duplicate text field.

**Result:**
Multer on the server failed to parse the multipart body, so `@UploadedFile()` was `undefined` → accessing `file.path` in `UserService.createProfileImage()` threw → **500 Internal Server Error**.

**Workaround:**
Bypass the autogenerated method in `UserApiRepository.createProfileImage()` and send the multipart request directly using the same `ApiClient` (basePath + auth), ensuring:
- No manual `Content-Type` header (let `MultipartRequest` set it with boundary)
- File only in `mp.files`, not `mp.fields`
- Proper filename fallback

* Revert "temporary workaround for 500 error"

This reverts commit 8436cd402632ca7be9272a1c72fdaf0763dcefb6.

* generate route for ProfilePictureCropPage

* add route import

* simplify

* try this

* Revert "try this"

This reverts commit fcf37d2801055c49010ddb4fd271feb900ee645a.

* try patching

* Reapply "temporary workaround for 500 error"

This reverts commit faeed810c21e4c9f0839dfff1f34aa6183469e56.

* Revert "Reapply "temporary workaround for 500 error""

This reverts commit a14a0b76d14975af98ef91748576a79cef959635.

* fix upload

* Refactor image conversion logic by introducing a new utility function. Replace inline image-to-Uint8List conversion with the new utility in EditImagePage, DriftEditImagePage, and ProfilePictureCropPage.

* use toast over snack

* format

* Revert "try patching"

This reverts commit 68a616522a1eee88c4a9755a314c0017e6450c0f.

* Enhance toast notification in ProfilePictureCropPage to include success type for better user feedback.

* Revert "simplify"

This reverts commit 8e85057a40.

* format

* add tests

* refactor to use statefulwidget

* format

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/lib/utils/action_button.utils.dart

@@ -24,6 +24,7 @@ import 'package:immich_mobile/presentation/widgets/action_buttons/set_album_cove
 import 'package:immich_mobile/presentation/widgets/action_buttons/share_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/share_link_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/similar_photos_action_button.widget.dart';
+import 'package:immich_mobile/presentation/widgets/action_buttons/set_profile_picture_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/trash_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/unarchive_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/unstack_action_button.widget.dart';
@@ -70,6 +71,7 @@ enum ActionButtonType {
   cast,
   setAlbumCover,
   similarPhotos,
+  setProfilePicture,
   viewInTimeline,
   download,
   upload,
@@ -155,6 +157,10 @@ enum ActionButtonType {
       ActionButtonType.similarPhotos =>
         !context.isInLockedView && //
             context.asset is RemoteAsset,
+      ActionButtonType.setProfilePicture =>
+        !context.isInLockedView && //
+            context.asset is RemoteAsset && //
+            context.isOwner,
       ActionButtonType.openInfo => true,
       ActionButtonType.viewInTimeline =>
         context.timelineOrigin != TimelineOrigin.main &&
@@ -235,6 +241,11 @@ enum ActionButtonType {
         iconOnly: iconOnly,
         menuItem: menuItem,
       ),
+      ActionButtonType.setProfilePicture => SetProfilePictureActionButton(
+        asset: context.asset,
+        iconOnly: iconOnly,
+        menuItem: menuItem,
+      ),
       ActionButtonType.openInfo => BaseActionButton(
         label: 'info'.tr(),
         iconData: Icons.info_outline,