fix(linux): respect an explicit Ozone display backend

[mcmah309]

Summary

Respect an explicit --ozone-platform choice instead of overriding it in Wayland sessions. Wayland remains the default when no backend is specified.

• electron/wayland.ts: the startup Wayland setup moves out of main.ts; --ozone-platform=wayland is only appended when the switch is absent. The PipeWire capturer and the Vulkan opt-out stay on in every Wayland session, so capture under an explicit Xwayland backend still goes through the portal.
• electron/ipc/desktopSourceTypes.ts reuses the same isWaylandSession check instead of a copy.

Type of change

• Bug fix
• Feature
• Enhancement
• Documentation
• Refactor / maintenance
• Performance
• Security

Release impact

• Patch
• Minor
• Major / breaking change
• No release note needed

Desktop impact

• Windows
• macOS
• Linux
• Installer / packaging
• Not platform-specific

Screenshots / video

Testing

• electron/wayland.test.ts: default Wayland session, explicit x11 / wayland / auto, non-Wayland session.
• Author: X11 editor smoke test.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Improved Linux Wayland compatibility by configuring the required display and screen-sharing support when running in a Wayland session.
  • Existing display-platform settings are preserved, and non-Wayland sessions remain unchanged.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Advanced
• Run ID: 6d1c13c5-5f3c-4253-8e24-caa240fcc4be

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📥 Commits

Reviewing files that changed from the base of the PR and between 870196c and 5f18ab1.

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📒 Files selected for processing (4)

• electron/ipc/desktopSourceTypes.ts
• electron/main.ts
• electron/wayland.test.ts
• electron/wayland.ts

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📝 Walkthrough

📝 Walkthrough

Walkthrough

The change adds shared Wayland session detection and command-line configuration. Linux startup uses the configuration helper, and desktop source enumeration uses the shared detector.

Changes

Linux Wayland support

Layer / File(s)	Summary
Wayland detection and configuration electron/wayland.ts, electron/wayland.test.ts	The helper detects Wayland from XDG_SESSION_TYPE or WAYLAND_DISPLAY. In Wayland sessions, it preserves an existing Ozone platform setting, enables drag and PipeWire features, and disables Vulkan. Tests cover Wayland and non-Wayland environments.
Linux startup and source enumeration electron/main.ts, electron/ipc/desktopSourceTypes.ts	Linux startup calls the configuration helper. Desktop source enumeration uses the shared detector and returns true only for Linux sessions that are not Wayland.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Suggested reviewers: etiennelescot

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Merge Risk: ⚪ Minimal · up to 5f18a

No actionable issue is identified that would prevent merging after normal checks.

Pre-merge checks | 4 | 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 4 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Description check		The description covers the change, type, release impact, platform impact, and testing. The related issue field remains as the template placeholder "Fixes #", but the description is otherwise complete.
Title check		The title clearly and concisely identifies the main Linux change: preserving an explicit Ozone display backend.

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[EtienneLescot]

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[EtienneLescot]

Marked ready: CI green; added a follow-up commit sharing the Wayland session check with source enumeration.

[EtienneLescot]

Reviewed: an explicit --ozone-platform is respected, Wayland stays the default. Thanks @mcmah309!