ci: drop redundant macos-14 from CI matrix

[ErikBjare]

Summary

• Remove macos-14 from both build.yml and build-tauri.yml CI matrices
• macos-latest now resolves to macos-15-arm64, same architecture as macos-14 — running both is redundant
• macos-14 is being deprecated by GitHub Actions in July 2026

[greptile-apps]

Greptile Summary

This PR removes the explicit macos-14 runner from the CI matrices in both build.yml and build-tauri.yml, since macos-latest now resolves to macos-15-arm64 (the same architecture as macos-14), and macos-14 is being deprecated by GitHub Actions in July 2026. The change reduces redundant CI jobs with no loss in meaningful coverage.

Confidence Score: 5/5

Safe to merge — removes a redundant, soon-to-be-deprecated CI runner with no impact on build or test coverage.

Both changed files are CI matrix configuration only. The removed macos-14 label shares the same arm64 architecture as macos-latest (now macos-15), and the deprecation is confirmed by GitHub's own announcement. No logic, code, or release artifact paths are affected.

No files require special attention.

Important Files Changed

Filename	Overview
.github/workflows/build.yml	Removes macos-14 from the OS matrix; macos-latest (now macos-15-arm64) provides equivalent architecture coverage.
.github/workflows/build-tauri.yml	Same one-line removal of macos-14 from the Tauri build OS matrix; no other changes.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[CI Trigger
push / PR / tag] --> B{Build Matrix}
    B --> C[ubuntu-24.04]
    B --> D[ubuntu-24.04-arm
build-tauri only]
    B --> E[windows-latest]
    B --> F[macos-latest
macos-15-arm64]
    F -.->|removed| G[macos-14
arm64 - DEPRECATED]
    C --> H[Build & Test]
    D --> H
    E --> H
    F --> H
    H --> I[Package & Upload Artifacts]
    I --> J{Tagged Release?}
    J -->|Yes| K[Release Job]
    J -->|No| L[End]
    K --> L

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