Update AppImage icon source path in build workflow

[rainxchzed]

Modified the build script to copy the application icon from the AppDir lib directory instead of the composeApp logo directory during the AppImage creation process.

Summary by CodeRabbit

• Chores
  • Updated the Linux AppImage build process to use the app icon from the correct source location.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between c1a9cfb and 9ed087f.

📒 Files selected for processing (1)

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

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Walkthrough

Updated the source path for copying the Linux AppImage app icon during the build process. The modification changes where the GitHub-Store icon is sourced from during desktop platform builds, with the destination and filename remaining consistent.

Changes

Cohort / File(s)	Summary
GitHub Actions Workflow .github/workflows/build-desktop-platforms.yml	Updated the icon source path for Linux AppImage build; changed where the app icon is copied from during the packaging step.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• ci(github): implement proper AppImage generation for Linux #281: Modifies the same AppImage build workflow and icon path handling for the GitHub-Store application
• feat(desktop): Add AppImage + Debian 12 as a target format #239: Updates AppImage packaging workflow configuration and adjusts icon source path handling during the build process

Poem

🐰 A path adjustment, crisp and clean,
The icon hops to a new scene!
From logo to AppImage it goes,
Where the GitHub-Store icon flows.
Tiny tweak, big workflow delight! ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch linux-appimage-icon-issue

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