fix(desktop): suppress Windows command consoles

[tulayha]

Summary

• restore explicit Windows CREATE_NO_WINDOW handling at the final shared process spawn boundary
• keep Job Object supervision by starting children suspended until whole-tree ownership is established
• cover both captured probe/recheck commands and long-lived service commands

Root cause

The target lifecycle refactor moved Windows process creation into process-wrap. The packaged execution path no longer applied the previously proven CommandExt::creation_flags behavior at the final spawn boundary, causing console windows to appear for startup probes, rechecks, and Open VidXP.

Impact

Installed Windows desktop builds launch all VidXP command flows without opening terminal windows. Probe cancellation and exact-child process-tree supervision remain intact.

Validation

• cargo +1.97.1 test --manifest-path desktop/src-tauri/Cargo.toml — 72 passed
• cargo +1.97.1 clippy --manifest-path desktop/src-tauri/Cargo.toml --all-targets -- -D warnings
• Windows captured-command console assertion
• Windows service-command console assertion
• focused Release Please version-marker packaging test
• cargo +1.97.1 fmt --manifest-path desktop/src-tauri/Cargo.toml -- --check
• git diff --check

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fix(desktop): prevent console windows during background operations
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