fix: dev terminal run history race condition

[cristipufu]

Description

Fix race condition between _refresh_running_items() and refresh_list() when runs complete during parallel execution in run history refresh causing NoMatches exception.

Race condition scenario:

• _refresh_running_items() starts iterating over run_list.children
• A run completes, triggering update_run() → refresh_list()
• refresh_list() calls run_list.clear(), removing all items
• _refresh_running_items() tries to query Static on a now-removed/rebuilt ListItem
• Exception is raised because the DOM structure changed mid-iteration

[Copilot]

Pull Request Overview

This PR fixes a race condition in the dev terminal run history component where concurrent operations between _refresh_running_items() and refresh_list() cause DOM structure exceptions. The fix implements defensive programming with snapshots and exception handling to prevent crashes when the UI list is cleared during iteration.

Key Changes

• Added snapshot-based iteration to avoid mid-iteration DOM changes
• Implemented exception handling for query operations and DOM access
• Added validation checks to ensure items still exist before accessing them

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