Add helper for generating shareable creator profile URL with UTM params

[aniokedianne]

Summary
The creator profile share action copies a plain URL. Adding UTM parameters to the shared URL lets the team track traffic from shared links without requiring separate landing pages.

Scope

• add a helper that appends a defined set of UTM params to a creator profile URL
• use the helper in the existing share or copy-link action
• keep UTM param values configurable so they can be updated without code changes

Acceptance Criteria

• the shared URL includes the expected UTM parameters
• the helper does not modify the URL when UTM params are not configured
• the base URL is unchanged; only query params are appended

Contributor coordination: if you pick this up, reach out in Telegram for updates or clarification: https://t.me/accesslayerorg

[cladiousdoff-glitch]

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