Allow setting "Crop image preview" for public shares

Similar to https://github.com/nextcloud/server/issues/39027

Allow to configure files settings for the public share view.

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⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Hi
When i uncheck "Crop image preview" it works for me but not not for the share. The share keeps showing cropped squares.

On the working side the parameter a=1 is toggled like this ...core/preview?fileId=1234&x=128&y=128&mimeFallback=true&v=1234&a=1

but on the share side maybe the a=1 parameter is not propagated or something?

Steps to reproduce

Expected behavior

i'd expect aspect ratio of the original photo is maintained (not shown as a square)

Nextcloud Server version

30

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

No response

No file or test is named. Start by tracing how the public-share view builds image preview requests and compare them with the working request, focusing on whether the crop setting is propagated; done means public-share previews preserve the original aspect ratio when cropping is disabled.