✨(frontend) preserve @ character when esc is pressed after typing it

[Ovgodd]

Purpose

Fix unintended removal of the @ symbol when pressing Esc during mention input.
This improves text editing flow, especially when @ is intended as plain text.

arobas.mp4

issue 1487

Proposal

• Prevent deletion of @ when mention suggestion is cancelled with Esc
• Ensure consistency across platforms and editors
• Add e2e test

[github-actions]

Size Change: +13 B (0%)

Total Size: 3.68 MB

Filename	Size	Change
apps/impress/out/_next/static/0d075b1b/_buildManifest.js	0 B	-878 B (removed)	🏆
apps/impress/out/_next/static/a44437be/_buildManifest.js	879 B	+879 B (new file)	🆕

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