fix(desktop): hide terminal window when opening explorer on Windows (#2309)

[Dewin]

What does this PR do?

Resolves #2309 (Linear CAP-814) where clicking "Open File" after an export on Windows flashes a visible console/terminal window.

• Fixes Export complete | Clicking 'Open File' causes a visible terminal window #2309

Root Cause

When spawning explorer.exe on Windows via std::process::Command, Windows defaults to allocating a temporary console window for the process unless the CREATE_NO_WINDOW process creation flag is explicitly set.

Solution

• Set creation_flags(CREATE_NO_WINDOW) (0x0800_0000) using std::os::windows::process::CommandExt on Command::new("explorer") calls in:
  • apps/desktop/src-tauri/src/lib.rs (open_file_path)
  • apps/desktop-gpui/src/library.rs (reveal_in_folder)
  • apps/desktop/src-tauri/src/automation.rs (reveal_path)
  • apps/cli/src/automation.rs (open_path_or_url)

Verification

• Verified consistent usage of CREATE_NO_WINDOW: u32 = 0x0800_0000 matching existing pattern in apps/desktop/src-tauri/src/export.rs.
• Checked argument formatting and execution paths on Windows.

Confidence Score: 5/5

The PR appears safe to merge, with no actionable correctness, security, or repository-rule issues identified.

Summary

This PR suppresses transient Windows console windows when Cap launches Explorer from desktop, GPUI, desktop automation, and CLI automation paths.

• Adds the Windows CREATE_NO_WINDOW creation flag to all direct Explorer process launches.
• Preserves the existing paths, arguments, process spawning, and platform-specific behavior.
• Keeps the Windows-only API imports behind target-specific compilation gates.

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