feat(DCP-2356): Add AITB Collection Preview command

[keyboSlice]

Summary

• Add collection preview command that opens a collection in the browser for preview before publishing
• Add support for PROLIFIC_APPLICATION_URL environment variable to override the default application URL

Changes

New Command: collection preview

prolific collection preview <collection-id>

This command:

• Validates the user has access to the specified collection
• Opens the collection preview in the default web browser
• Outputs the URL for easy copy/paste to a different browser

Environment Variable Support

Added PROLIFIC_APPLICATION_URL environment variable (defaults to https://app.prolific.com) to allow overriding the application URL, useful for testing against staging environments.

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Ticket: DCP-2356

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Note

Low Risk
Adds a new CLI command and a configurable base URL; behavior is additive and only affects URL generation/browser-opening, with minimal impact on existing flows.

Overview
Adds a new prolific collection preview <collection-id> command that validates access via GetCollection, prints a preview URL, and attempts to open it in the user’s default browser (non-fatal if browser launch fails, and shows the feature-access message when the feature isn’t enabled).

Introduces PROLIFIC_APPLICATION_URL (defaulting to https://app.prolific.com with trailing slash trimmed) and centralizes preview URL construction in ui/collection (GetCollectionPreviewPath/GetCollectionPreviewURL), with accompanying unit tests.

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[Copilot]

Pull request overview

Adds a new prolific collection preview <collection-id> command to open a collection preview page in the user’s browser, and introduces PROLIFIC_APPLICATION_URL to override the default app base URL.

Changes:

• Added collection preview Cobra command that validates access via GetCollection and opens a preview URL in the browser.
• Added preview URL/path helpers for collections.
• Added configurable application base URL via PROLIFIC_APPLICATION_URL (defaulting to https://app.prolific.com).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
cmd/collection/collection.go	Registers the new preview subcommand under collection.
cmd/collection/preview.go	Implements the collection preview command (access check + browser open + output).
cmd/collection/preview_test.go	Adds tests for the new preview command behavior and output.
config/config.go	Adds PROLIFIC_APPLICATION_URL support and trims trailing slashes.
ui/collection/view.go	Adds GetCollectionPreviewPath / GetCollectionPreviewURL helpers using config.
ui/collection/view_test.go	Adds tests for the new preview path/URL helper functions.

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[script-this]