ci(ios): reuse backend build script without duplicate framework setup

Build the XCFramework through scripts/build_ios.sh and use the framework configuration already committed in the Xcode project. Remove duplicate registration and its dedicated Ruby dependency setup.

Verified an unsigned release archive and one Gobackend reference, link entry, and embedded framework.

.github/workflows/release.yml

@@ -242,67 +242,11 @@ jobs:
           key: pods-${{ runner.os }}-${{ hashFiles('ios/Podfile.lock') }}
           restore-keys: pods-${{ runner.os }}-
 
-      - name: Install gomobile
-        working-directory: go_backend
-        run: |
-          # go.mod-pinned x/mobile version (reproducible + cached by setup-go).
-          go install golang.org/x/mobile/cmd/gomobile
-          gomobile init
-
       - name: Build Go backend for iOS
-        working-directory: go_backend
-        run: |
-          mkdir -p ../ios/Frameworks
-          gomobile bind -target=ios -tags ios -o ../ios/Frameworks/Gobackend.xcframework .
+        run: bash scripts/build_ios.sh
         env:
           CGO_ENABLED: 1
 
-      - name: Verify XCFramework created
-        run: |
-          ls -la ios/Frameworks/
-          ls -la ios/Frameworks/Gobackend.xcframework/ || (echo "ERROR: XCFramework not found!" && exit 1)
-
-      - name: Add XCFramework to Xcode project
-        run: |
-          # xcodeproj usually ships with the preinstalled CocoaPods; only
-          # install it when missing.
-          gem list -i xcodeproj >/dev/null || sudo gem install xcodeproj
-
-          # Create Ruby script to add framework
-          cat > add_framework.rb << 'EOF'
-          require 'xcodeproj'
-
-          project_path = 'ios/Runner.xcodeproj'
-          project = Xcodeproj::Project.open(project_path)
-
-          # Get the main target
-          target = project.targets.find { |t| t.name == 'Runner' }
-
-          # Get or create Frameworks group
-          frameworks_group = project.main_group.find_subpath('Frameworks', true)
-          frameworks_group ||= project.main_group.new_group('Frameworks')
-
-          # Add XCFramework reference
-          framework_path = 'Frameworks/Gobackend.xcframework'
-          framework_ref = frameworks_group.new_file(framework_path, :project)
-
-          # Add to frameworks build phase
-          frameworks_build_phase = target.frameworks_build_phase
-          frameworks_build_phase.add_file_reference(framework_ref)
-
-          # Add to embed frameworks build phase
-          embed_phase = target.build_phases.find { |p| p.is_a?(Xcodeproj::Project::Object::PBXCopyFilesBuildPhase) && p.name == 'Embed Frameworks' }
-          if embed_phase
-            build_file = embed_phase.add_file_reference(framework_ref)
-            build_file.settings = { 'ATTRIBUTES' => ['CodeSignOnCopy', 'RemoveHeadersOnCopy'] }
-          end
-
-          project.save
-          puts "Successfully added Gobackend.xcframework to Xcode project"
-          EOF
-
-          ruby add_framework.rb
-
       - name: Setup Flutter
         uses: subosito/flutter-action@1a449444c387b1966244ae4d4f8c696479add0b2 # v2
         with: