fix(ci): add iOS platform download step to fix missing SDK

The macos-15 runners have Xcode installed but the iOS SDK/platform
is not bundled. Adding xcodebuild -downloadPlatform iOS to fetch it.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: mtopo27

.github/workflows/ios_emerge_upload_adhoc.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   build_adhoc:
-    runs-on: macos-14
+    runs-on: macos-15
 
     defaults:
       run:
@@ -20,7 +20,10 @@ jobs:
           fetch-depth: 0
 
       - name: Select Xcode version
-        run: sudo xcode-select -s '/Applications/Xcode_15.4.app/Contents/Developer'
+        run: sudo xcode-select -s '/Applications/Xcode_16.2.app/Contents/Developer'
+
+      - name: Download iOS platform
+        run: xcodebuild -downloadPlatform iOS
 
       - name: Set up Ruby env
         uses: ruby/setup-ruby@v1

.github/workflows/ios_emerge_upload_main.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   build:
-    runs-on: macos-14
+    runs-on: macos-15
 
     defaults:
       run:
@@ -19,7 +19,10 @@ jobs:
           fetch-depth: 0
 
       - name: Select Xcode version
-        run: sudo xcode-select -s '/Applications/Xcode_15.4.app/Contents/Developer'
+        run: sudo xcode-select -s '/Applications/Xcode_16.2.app/Contents/Developer'
+
+      - name: Download iOS platform
+        run: xcodebuild -downloadPlatform iOS
 
       - name: Set up Ruby env
         uses: ruby/setup-ruby@v1
@@ -52,7 +55,7 @@ jobs:
           EMERGE_BUILD_TYPE: release
 
   build_adhoc:
-    runs-on: macos-14
+    runs-on: macos-15
 
     defaults:
       run:
@@ -65,7 +68,10 @@ jobs:
           fetch-depth: 0
 
       - name: Select Xcode version
-        run: sudo xcode-select -s '/Applications/Xcode_15.4.app/Contents/Developer'
+        run: sudo xcode-select -s '/Applications/Xcode_16.2.app/Contents/Developer'
+
+      - name: Download iOS platform
+        run: xcodebuild -downloadPlatform iOS
 
       - name: Set up Ruby env
         uses: ruby/setup-ruby@v1

.github/workflows/ios_emerge_upload_pr.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: macos-14
+    runs-on: macos-15
 
     defaults:
       run:
@@ -20,7 +20,10 @@ jobs:
           fetch-depth: 0
 
       - name: Select Xcode version
-        run: sudo xcode-select -s '/Applications/Xcode_15.4.app/Contents/Developer'
+        run: sudo xcode-select -s '/Applications/Xcode_16.2.app/Contents/Developer'
+
+      - name: Download iOS platform
+        run: xcodebuild -downloadPlatform iOS
 
       - name: Set up Ruby env
         uses: ruby/setup-ruby@v1

.github/workflows/ios_emerge_upload_snapshots.yml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   upload_emerge_snapshots:
-    runs-on: macos-14
+    runs-on: macos-15
 
     defaults:
       run:
@@ -22,7 +22,10 @@ jobs:
           fetch-depth: 0
 
       - name: Select Xcode version
-        run: sudo xcode-select -s '/Applications/Xcode_15.4.app/Contents/Developer'
+        run: sudo xcode-select -s '/Applications/Xcode_16.2.app/Contents/Developer'
+
+      - name: Download iOS platform
+        run: xcodebuild -downloadPlatform iOS
 
       - name: Set up Ruby env
         uses: ruby/setup-ruby@v1
@@ -39,7 +42,7 @@ jobs:
           EMERGE_API_TOKEN: ${{ secrets.EMERGE_API_KEY }}
 
   upload_swift_snapshot_testing_snapshots:
-    runs-on: macos-14
+    runs-on: macos-15
     defaults:
       run:
         working-directory: ./ios
@@ -49,7 +52,10 @@ jobs:
         with:
           fetch-depth: 0
       - name: Select Xcode version
-        run: sudo xcode-select -s '/Applications/Xcode_15.4.app/Contents/Developer'
+        run: sudo xcode-select -s '/Applications/Xcode_16.2.app/Contents/Developer'
+
+      - name: Download iOS platform
+        run: xcodebuild -downloadPlatform iOS
       - name: Ruby setup
         uses: ruby/setup-ruby@v1
         with:
@@ -70,7 +76,7 @@ jobs:
           set -o pipefail && xcodebuild test \
             -scheme HackerNews \
             -sdk iphonesimulator \
-            -destination 'platform=iOS Simulator,name=iPhone 15 Pro,OS=17.5' \
+            -destination 'platform=iOS Simulator,name=iPhone 16 Pro,OS=18.2' \
             -only-testing:HackerNewsTests/SwiftSnapshotTest \
             -allowProvisioningUpdates \
             -authenticationKeyPath "$AUTH_KEY_PATH" \