Add iOS UI screenshot regression tests

[shai-almog]

Summary

• add a reusable iOS simulator UI test harness that captures screenshots and uploads comparison reports
• update the Codename One app template to expose UI states for automated testing and seed a UI test template during workspace generation
• teach the screenshot comment tooling to support per-platform markers, headings, and log prefixes so Android and iOS reports coexist

Testing

• Not run (requires macOS simulator and GitHub environment)

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https://chatgpt.com/codex/tasks/task_e_68f1fc08a89083318bb6eb8582fd492e

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Replace bash mapfile usage in iOS test runner

The new iOS screenshot harness enumerates PNGs with mapfile -t, but macOS GitHub runners invoke /usr/bin/env bash as the system Bash 3.2, which does not provide the mapfile/readarray builtin. When this job runs on the default macOS image the script will abort with mapfile: command not found before any screenshots are processed, causing the entire workflow step to fail even though the tests themselves may have passed. Iterate over find results with a POSIX‑compatible loop instead so the script works on the stock shell.

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[shai-almog]

✅ Native Android screenshot tests passed.