fix(ci): stabilize release workflows and parallel desktop builds

[DIYgod]

Description

This PR fixes desktop and mobile release workflow gating by matching release commits inside merge commit messages (contains instead of startsWith).
It updates desktop release orchestration to trigger two workflow_dispatch runs (Tag Version and Store) and adjusts desktop concurrency grouping so both runs can execute in parallel.
It also updates desktop/mobile release skills to commit changelog changes before running pnpm bump and to verify a clean working tree.

PR Type

• Feature
• Bugfix
• Hotfix
• Other (please describe):

Screenshots (if UI change)

Demo Video (if new feature)

Linked Issues

Additional context

Please focus review on workflow trigger conditions and desktop concurrency grouping behavior.

Changelog

• I have updated the changelog/next.md with my changes.

[safedep]

SafeDep Report Summary

No dependency changes detected. Nothing to scan.

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