ci: build the iOS app on every PR; raise the iOS minimum to 14.0

[grunch]

Summary

Nothing in CI compiled the iOS target. The Swift in ios/Runner/, the CocoaPods graph (Firebase, workmanager, the cargokit pod that builds the Rust core) and project.pbxproj edits all pass flutter analyze and flutter test on Linux and only fail on a Mac. PR-4b (#483) merged with its iOS build unverified for exactly that reason.

• New ios job in ci.yml (macos-26, 60 min timeout):

  • flutter build ios --debug --no-codesign, a device build without signing (CI has no Apple certificate);
  • the same FLUTTER_VERSION as the other jobs;
  • rustup target add aarch64-apple-ios --toolchain stable up front, so cargokit (default toolchain stable, the repo has no cargokit.yaml) doesn't download it mid-Xcode-build;
  • CocoaPods cache keyed on pubspec.lock + ios/Podfile.

  The repo is public, so macOS minutes aren't billed.

  Why macos-26: the first run on macos-15 failed in Swift compilation. workmanager_apple 0.9.11 uses BGContinuedProcessingTask (iOS 26 SDK), and each runner image ships a single Xcode major (macos-15 has Xcode 16). macos-26 ships Xcode 26.6. Building on a Mac locally needs Xcode 26 too.

• Fix in ios/Runner/AppDelegate.swift, the second failure the job caught: WorkmanagerPlugin.registerPeriodicTask(... earliestBeginInSeconds: 12 * 60 * 60) passed an Int where the parameter is NSNumber? ("Cannot convert value of type 'Int' to expected argument type 'NSNumber'"). It came from PR-1d (feat(push): PR-1d — OS-scheduled registration refresh #470) and had never compiled. It is now NSNumber(value: 12 * 60 * 60), still 12 h.

• iOS minimum 13.0 → 14.0. Before writing the job I checked every iOS pod's deployment_target in the pub cache: workmanager_apple (the T1.5 push refresh job, feat(push): PR-1d — OS-scheduled registration refresh #470) requires 14.0, while the Podfile and the Xcode project were at 13.0. pod install refuses that ("required a higher minimum deployment target"), so this was the first failure the job would have hit. It's updated in the Podfile (platform :ios and post_install), in the Debug/Release/Profile configurations of project.pbxproj, and in the README table.

• test/ci/ios_build_workflow_test.dart (in the same style as pages_bundle_test.dart):

  • the ios job exists, runs on macos-, runs flutter build ios with --no-codesign, and uses ${{ env.FLUTTER_VERSION }};
  • the deployment target is a single value across Podfile and pbxproj and is at least 14.0.

Not covered: entitlements (aps-environment, keychain group) are only applied when signing, so a signed build on a device is still the only check for them.

Follow-up with #486: its status line says "no iOS CI job". Whichever merges second should update that sentence.

Test plan

• Tests written first and seen failing: the job ones ("ci.yml has no ios job"), then the deployment target one ({13.0, 14.0})
• flutter test test/ci/ios_build_workflow_test.dart: 4/4
• flutter test: 1317 passed
• flutter analyze: no issues
• ci.yml parses as YAML; jobs rust, flutter, web, ios
• The iOS (build, no codesign) job goes green on this PR (run 34993104466; all four CI jobs green), after the two fixes above

Manual testing

1. On this PR, open the CI / iOS (build, no codesign) check: pod install and the build finish, and cargokit's "Build Rust library" phase compiles librust.a for aarch64-apple-ios.
2. Optional, on a Mac: flutter build ios --debug --no-codesign on this branch finishes the same way.

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Summary by CodeRabbit

• Compatibility

  • The minimum supported iOS version is now iOS 14.
  • Devices running iOS 13 or earlier are no longer supported.

• Quality Improvements

  • Added automated validation for iOS builds to help detect platform compatibility issues before release.
  • Improved reliability of scheduled background task configuration on iOS.

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📥 Commits

Reviewing files that changed from the base of the PR and between 9afc356 and 4ce8af4.

📒 Files selected for processing (3)

• .github/workflows/ci.yml
• ios/Runner/AppDelegate.swift
• test/ci/ios_build_workflow_test.dart

🚧 Files skipped from review as they are similar to previous changes (2)

• .github/workflows/ci.yml
• test/ci/ios_build_workflow_test.dart

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Walkthrough

The pull request raises the minimum iOS version to 14, moves the iOS CI job to macOS 26, wraps the periodic-task interval in NSNumber, and adds tests for CI and deployment-target configuration.

Changes

iOS Deployment and CI

Layer / File(s)	Summary
iOS 14 deployment target ios/Podfile, ios/Runner.xcodeproj/project.pbxproj, README.md	The Podfile, Xcode build configurations, and README now use iOS 14 as the minimum version.
macOS iOS build job .github/workflows/ci.yml	The iOS CI job now runs on macOS 26. Its Rust, Flutter, CocoaPods, and unsigned iOS build steps remain unchanged.
Runtime registration and configuration validation ios/Runner/AppDelegate.swift, test/ci/ios_build_workflow_test.dart	The periodic task interval is passed as NSNumber. Tests verify the CI job settings and consistent deployment-target values.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~15 minutes

Change: Feature

Merge Risk: ⚪ Minimal · up to 4ce8a

The iOS deployment, CI runner, and periodic-task configuration are consistent and mergeable.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files. (2 skipped: 2 …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the two main changes: adding iOS CI builds for every pull request and raising the minimum iOS version to 14.0.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files. (2 skipped: 2 unsupported.)

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Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-15T15:50:34.697126Z	9afc356	PR opened

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Inline comments:
In `@test/ci/ios_build_workflow_test.dart`:
- Around line 46-47: Update the iOS workflow assertion in the relevant test to
match a single run command containing both “flutter build ios” and
“--no-codesign”, rather than checking each substring independently. Preserve the
existing workflow validation while ensuring the flag is bound to the build
command.

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⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

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Run ID: bdeadd21-15e4-41c5-89a9-823580a6aefe

📥 Commits

Reviewing files that changed from the base of the PR and between 08db1da and 9afc356.

📒 Files selected for processing (5)

• .github/workflows/ci.yml
• README.md
• ios/Podfile
• ios/Runner.xcodeproj/project.pbxproj
• test/ci/ios_build_workflow_test.dart

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