feat(settings): add bordered wrapper to signature editor for clearer …

[GlyphicGuy]

Summary
Adds a bordered wrapper around the signature editor in SignatureSettings.vue so the editable region is visually delimited from surrounding controls like the “Place signature above quoted text” checkbox.

Details
Adds .signature-editor-wrapper providing input-like border, radius, and focus ring
Suppresses inner CKEditor border to prevent double border
Improves visual clarity and reduces user confusion
Testing
Built frontend (npm run build) – success (only pre-existing warnings)
Ran ESLint & stylelint – no new errors introduced

Fixes #11115

[welcome]

Thanks for opening your first pull request in this repository! ✌️

[ChristophWurst]

Thank you! This looks good code-wise. Could you please also post before/after screenshots? I will give this a test of course, but like to have the before/after documented in the PR.

[GlyphicGuy]

@ChristophWurst Surely I'll put the screenshots through,
I'm new to Open-source, can I take some time?
Thank you.

[ChristophWurst]

Sure, take your time!

[ChristophWurst]

Works very well!

Thanks again

Before	After

[ChristophWurst]

@GlyphicGuy there is one thing missing: a sign-off. Please see https://github.com/nextcloud/mail/pull/11789/checks?check_run_id=51886414074. Amend the commit, add sign-off and force push.

The sign-off is needed so we know your contribution is compatible with the license of this project.

[GlyphicGuy]

@ChristophWurst surely, I'll amend the commit message!

[GlyphicGuy]

@ChristophWurst i am new to opensource workflows, could you help me with this thing? I'm not quite sure in handling this...
Thank you.

[ChristophWurst]

I think you need a local checkout for this. It can't be done from the Github web UI.

[GlyphicGuy]

@ChristophWurst i treid following the instructions on the DCO error page, the signed off is solved but i think i messed up some things. I apologies beforehand. kindly guide me if this can be fixed again :(

[ChristophWurst]

I have redone the rebase for you. Fetch origin and reset your local branch to it. Then try again with the sign off.

[GlyphicGuy]

@ChristophWurst did i do it right?

[ChristophWurst]

Yes looks good

[GlyphicGuy]

@ChristophWurst is it good to go now? thank you for your patient guidance!

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[ChristophWurst]

Yes :)

Thank you