fix(frontend): promptly cancel requests after client disconnect - #27634

• ✅ Entered queue — 2026-08-27 12:26 UTC · Rule: main · triggered by rule Automatic queue on approval for main
• 🟠 Checks running · in-place
• 🚫 Left the queue — 2026-08-27 12:31 UTC · at 2b6eaa6c0befea2d48c0a7f9cb650ffcb370648e

This pull request spent 4 minutes 54 seconds in the queue, with no time running CI.

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