fix: install iOS platform before building to fix broken iOS CI

Add xcodebuild -downloadPlatform iOS in the Fastfile before_all block and
as a separate CI step in both iOS release workflows to ensure iOS 26.0 platform
is installed when using Xcode 26.0.1 on macos-26 runner.

Agent-Logs-Url: https://github.com/openfoodfacts/smooth-app/sessions/12497af8-2d90-4635-a876-e98ede31a406

Co-authored-by: teolemon <1689815+teolemon@users.noreply.github.com>

Author: Copilot

.github/workflows/ios-release-to-org-openfoodfacts-scanner.yml

@@ -108,6 +108,9 @@ jobs:
       - name: Enable Rive dependency
         run: cd ./packages/smooth_app && dart run rive_native:setup --verbose --clean --platform ios
 
+      - name: Install iOS platform
+        run: xcodebuild -downloadPlatform iOS
+
       - name: Build app
         run: cd ./packages/smooth_app && cd ios && rm -rf Pods && rm -f Podfile.lock && flutter pub get && pod install && cd .. && flutter build ios --release --no-codesign -t lib/entrypoints/ios/main_ios.dart
         env:

.github/workflows/ios-release-to-org-openxfacts-scanner.yml

@@ -112,6 +112,9 @@ jobs:
       - name: Enable Rive dependency
         run: cd ./packages/smooth_app && dart run rive_native:setup --verbose --clean --platform ios
 
+      - name: Install iOS platform
+        run: xcodebuild -downloadPlatform iOS
+
       - name: Build app
         run: cd ./packages/smooth_app && cd ios && rm -rf Pods && rm -f Podfile.lock && flutter pub get && pod install && cd .. && flutter build ios --release --no-codesign -t lib/entrypoints/ios/main_ios.dart
         env:

packages/smooth_app/ios/fastlane/Fastfile

@@ -3,9 +3,10 @@ default_platform(:ios)
 
 before_all do
   xcodes(
-  version: '26.0.1',
-  select_for_current_build_only: true,
+    version: '26.0.1',
+    select_for_current_build_only: true,
   )
+  sh("xcodebuild -downloadPlatform iOS")
 end
 
 platform :ios do