build: patch .deb scripts for headless and WSL compatibility

[rainxchzed]

• Add a new step to the Linux desktop build workflow to modify .deb installer scripts.
• Patch postinst, prerm, and postrm scripts to make xdg-utils commands non-fatal.
• Append || true to calls for xdg-desktop-menu, xdg-icon-resource, and xdg-mime.
• Ensure package installation and removal succeed in headless environments, Docker containers, and WSL where desktop services may be unavailable.

Summary by CodeRabbit

• Bug Fixes
  • Enhanced Linux desktop package installer robustness by ensuring desktop integration operations during installation do not cause the installation process to fail.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 4ce24512-4373-49ab-8810-968c1afd5de0

📥 Commits

Reviewing files that changed from the base of the PR and between 2b3da47 and f094c1d.

📒 Files selected for processing (1)

• .github/workflows/build-desktop-platforms.yml

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Walkthrough

A new Linux CI step is added to post-process generated .deb packages by extracting them, appending || true to maintainer script commands for XDG utilities to prevent installation failures, then repacking. Windows and macOS workflows remain unaffected.

Changes

Cohort / File(s)	Summary
Debian Package Post-Processing .github/workflows/build-desktop-platforms.yml	Adds a new Linux CI step that extracts, modifies, and repacks .deb artifacts. Appends || true to maintainer script invocations of XDG utilities (xdg-desktop-menu, xdg-icon-resource, xdg-mime) in DEBIAN/postinst, prerm, and postrm files to ensure non-fatal execution during package installation.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• feat(desktop): Add AppImage + Debian 12 as a target format #239: Enables building Deb/AppImage and adjusts the workflow matrix; these changes directly complement the .deb post-processing step added here.
• ci(workflow): Enhance desktop build process and add Linux variants #238: Modifies the same GitHub Actions workflow's Linux build and packaging steps; this PR adds the post-build patch step while that PR adjusts Linux matrix and artifact naming.

Poem

🐰 With dpkg and scripts, I hop and extract,
Appending true to XDG tracts,
Debian packages now survive with grace,
No installation fails in this place! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'build: patch .deb scripts for headless and WSL compatibility' directly and clearly describes the main change: patching Debian package scripts for better compatibility in headless/WSL environments.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch linux-build-fix

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