fix: simplify cronjob record duration display

[ssongliu]

Refs #13381

[Copilot]

Pull request overview

This PR updates the cronjob execution record UI to display task duration (interval) in a more human-readable format, aligning with the request in Issue #13381 to convert raw seconds/milliseconds into appropriate time units.

Changes:

• Replaces inline ms vs s conditional rendering with a single formatInterval() formatter.
• Adds a formatter that converts milliseconds into hour/minute/second components (with fractional seconds).

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (1)

frontend/src/views/cronjob/cronjob/record/index.vue:303

• formatInterval hard-codes h/min/s unit suffixes, which bypasses existing i18n unit helpers used elsewhere (e.g. frontend/src/views/toolbox/clam/operate/index.vue:98-124 uses commons.units.*Unit). This will render English units even in non-English locales.

    return [
        hours ? `${hours}h` : '',
        minutes ? `${minutes}min` : '',
        seconds ? `${seconds}s` : '',
        milliseconds ? `${milliseconds}ms` : '',