ci: run iOS CI on macos-26 with Xcode 26.6 and a 20-minute timeout

[SamGu-NRX]

What changed

iOS CI now runs on the macos-26 image with Xcode 26.6 pinned, and both jobs time out after 20 minutes.

The app's deployment target is iOS 26.0, but macos-15 only ships Xcode 16.4 and the iOS 18.5 simulator. On #6, the build finished and then the test launch hung: Xcode warned that "the iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 26.0, but the range of supported deployment target versions is 12.0 to 18.5.99". The job ran until GitHub's 6-hour default cancelled it (run 37622461677).

• Image: macos-26 (arm64) ships Xcode 26.0.1 through 26.6, with iOS 26.0–26.5 simulators that include iPhone 17 Pro, the device resolve_ios_sim_destination.sh asks for first (image readme).
• Pinned Xcode: DEVELOPER_DIR pins Xcode 26.6, so a change to the image's default can't silently swap the toolchain.
• Timeout: timeout-minutes: 20 on both jobs. In the cancelled run, the clean build took about 2 minutes (12:39:36 to 12:41:27), and the suite runs in seconds locally, so 20 minutes leaves room for a cold build and simulator boot. The limit isn't tuned beyond that.

Why

The app stays on iOS 26, its declared target. Moving CI to iOS 26 is a smaller change than lowering the target. #2 stays open for its author to decide.

Verification

• The workflow parses as YAML.
• This PR's own CI run is the test of the new image; its result is reported on this PR.

Checklist

• The scope is focused; related changes belong together
• I explained what changed and why
• N/A before/after images: CI configuration only
• N/A video: no UI

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated iOS build and test workflows to use a newer macOS and Xcode environment.
  • Added a 20-minute limit to the build and test job.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-07T20:30:02.661707Z	ef7afca	PR opened

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ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Organization UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: 635312e4-2335-4433-b693-9990cbde852e

📥 Commits

Reviewing files that changed from the base of the PR and between 1f85e88 and ef7afca.

📒 Files selected for processing (1)

• .github/workflows/ios-ci.yml

Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

Both iOS CI jobs now run on macos-26 and select Xcode 26.6 through DEVELOPER_DIR. Each job has a 20-minute timeout.

Changes

iOS CI Runner Updates

Layer / File(s)	Summary
Configure iOS CI jobs .github/workflows/ios-ci.yml	Both jobs now use macos-26, select Xcode 26.6 through DEVELOPER_DIR, and have a 20-minute timeout. The build-and-test job comments now describe the iOS target, simulator, and timeout. The dead-code-advisory dependency on build-and-test is unchanged.

Priority: ➖ Normal

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to ef7af

No actionable merge-blocking risk is evident in the supplied review context.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main changes: moving iOS CI to macos-26, selecting Xcode 26.6, and adding a 20-minute timeout.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 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.

• Autopilot · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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