Bump iOS deployment target to 15+ (App Store minimum)

[mobilinkd]

Summary

The app currently targets iOS 9.3. Current Xcode 26.5 enforces iOS 15 as the minimum deployment target for App Store submissions. This blocks modernization (Combine, async/await) and prevents publishing updates.

Background

• Current target: in .pbxproj
• App Store minimum (Xcode 26.5): iOS 15
• Test device: iPhone Xs on iOS 18.11

Scope

1. Update to 15.0 across all build configs
2. Fix deprecation warnings surfaced by the target bump
3. Verify clean Command line invocation:
   /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild

ComputePackagePrebuildTargetDependencyGraph

Prepare packages

CreateBuildRequest

SendProjectDescription

CreateBuildOperation

ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (1 target)
Target 'Mobilinkd TNC Config' in project 'Mobilinkd TNC Config' (no dependencies)

GatherProvisioningInputs

CreateBuildDescription

ExecuteExternalTool /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.5.sdk -x c -c /dev/null

ExecuteExternalTool /Applications/Xcode.app/Contents/Developer/usr/bin/ibtool --version --output-format xml1

ExecuteExternalTool /Applications/Xcode.app/Contents/Developer/usr/bin/actool --print-asset-tag-combinations --output-format xml1 /Users/rob/git/iosTncConfig/Mobilinkd TNC Config/Assets.xcassets

ExecuteExternalTool /Applications/Xcode.app/Contents/Developer/usr/bin/actool --version --output-format xml1

ExecuteExternalTool /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version

ExecuteExternalTool /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details

Build description signature: 4dd742eec813928dbbfe0732478e4d47
Build description path: /Users/rob/git/iosTncConfig/build/XCBuildData/4dd742eec813928dbbfe0732478e4d47.xcbuilddata
/Users/rob/git/iosTncConfig/Mobilinkd TNC Config.xcodeproj: warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 9.3, but the range of supported deployment target versions is 12.0 to 26.5.99. (in target 'Mobilinkd TNC Config' from project 'Mobilinkd TNC Config')
/Users/rob/git/iosTncConfig/Mobilinkd TNC Config.xcodeproj: error: No profiles for 'com.mobilinkd.iosConfigApp' were found: Xcode couldn't find any iOS App Development provisioning profiles matching 'com.mobilinkd.iosConfigApp'. Automatic signing is disabled and unable to generate a profile. To enable automatic signing, pass -allowProvisioningUpdates to xcodebuild. (in target 'Mobilinkd TNC Config' from project 'Mobilinkd TNC Config')
warning: Run script build phase 'Run Script' will be run during every build because it does not specify any outputs. To address this issue, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'Mobilinkd TNC Config' from project 'Mobilinkd TNC Config')
warning: Run script build phase 'Run Script' will be run during every build because it does not specify any outputs. To address this issue, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'Mobilinkd TNC Config' from project 'Mobilinkd TNC Config') compile
4. Hardware-in-the-loop smoke test (BLE scan + connect + configure)

Acceptance Criteria

• Build succeeds with iOS 15 target, zero warnings
• App launches on test hardware
• BLE scan discovers TNC device
• Connect + configure cycle works end-to-end

/label enhancement
/assign @rob\n/milestone v1.1

[mobilinkd]

Implemented on branch fix/issue-6 (pushed to origin).

Changes

• IPHONEOS_DEPLOYMENT_TARGET: 9.3 → 15.0 (4 refs in .pbxproj)
• UIActivityIndicatorView.Style.gray → .medium in BLECentralViewController + TncConfigMenuViewController

Build Verification

• ✅ Clean xcodebuild (Release-iphoneos, unsigned): zero compiler warnings/errors
• ✅ Full plan documented at ~/.openclaw/workspace/plans/iosTncConfig-ios15-bump.md

Pre-merge Hardware Checklist

• App launches on iPhone Xs (iOS 18.11)
• BLE scan discovers TNC
• Connect + configure end-to-end

⚠️ Device build requires signing cert — commit 1a8a013 is unsigned. Sign locally or use CI before install.

[mobilinkd]

Update: Simulator build also verified clean after Xcode update on Diamond.

• ✅ iphonesimulator SDK build: success, zero warnings/errors
• ✅ iphoneos SDK build: success, zero warnings/errors