#435 fix(ci): force Tauri DMG Finder decoration on GitHub-hosted runners

[Anonymous]

Originally created by: Akarsh-Hegde

Summary

• The drag-to-Applications DMG background from [#426] was silently not rendering in Finder for real installs. Root cause: Tauri's DMG bundler skips the AppleScript step that writes .DS_Store (background image reference, icon positions, window bounds) whenever CI is set, assuming CI runners can't drive Finder ([tauri-apps/tauri#1731](https://github.com/tauri-apps/tauri/issues/1731)). GitHub Actions sets CI=true on every job by default, so every DMG built by release.yml/release-staging.yml shipped background.png as an inert bundled file with no .DS_Store pointing Finder at it.
• Verified by downloading Meridian.dmg from the latest staging release (v1.70.0-staging.5), mounting it, and confirming background.png was present and byte-identical to the repo's asset, but .DS_Store was completely absent from the volume.
• GitHub-hosted macos-26 runners have a full interactive desktop session (unlike headless/self-hosted CI), so it's safe to force the decoration step via TAURI_BUNDLER_DMG_IGNORE_CI=true in both release workflows' job-level env.

Test plan

• [ ] Trigger a staging release build ([staging-release] marker commit or workflow_dispatch on release-staging.yml) and confirm the run succeeds
• [ ] Download the resulting Meridian.dmg, mount it, and confirm .DS_Store is now present and Finder renders the themed background + curved arrow
• [ ] No change expected to non-DMG artifacts (Meridian.app.tar.gz, latest.json)

🤖 Generated with Claude Code

https://claude.ai/code/session_017ADhKy7AoHqknbZwTwLFkS

[Anonymous]

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[Anonymous]

Ticket changed by: Akarsh-Hegde

• status: open --> closed