IS-10950 previewer listing

[markoweb]

Makes the previewer's listing page available for editing.

[Copilot]

Pull request overview

This PR updates the Identity Server previewer startup script to allow the listing page template to be overridden (so it can be edited locally), and aligns workspace metadata in the lockfile.

Changes:

• Add support for passing a listing template path to the Java previewer via LISTING_TEMPLATE (-l arg).
• Replace string throws with Error objects and clean up a few JS style issues (const/semicolons).
• Update package-lock.json workspaces list to remove src/login-web-app.

Reviewed changes

Copilot reviewed 1 out of 3 changed files in this pull request and generated no comments.

File	Description
src/identity-server/previewer.js	Adds listing-template support and refactors error handling / minor cleanup.
package-lock.json	Updates workspace list to match the current monorepo layout.

Comments suppressed due to low confidence (1)

src/identity-server/previewer.js:220

• prepareSettings always assigns config['additional-static-root'] (line 219) even when the option isn't provided, which creates the property with an undefined value. Later, watch() uses the in operator to decide whether to watch the additional root, so this can cause it to start watching paths like undefined/**/**.css. Only set config['additional-static-root'] when the option is actually defined (or adjust the downstream check to test the value rather than property presence).

    config['static-root'] = optionsOrArgv['static-root'];
    config['template-root'] = optionsOrArgv['template-root'];
    config['message-root'] = optionsOrArgv['message-root'];
    config['additional-static-root'] = optionsOrArgv['additional-static-root'];
    return config;

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[urre]

We created a page in confluence on how to work with the template listing page: https://curity.atlassian.net/wiki/pages/resumedraft.action?draftId=463601666&draftShareId=e71341ca-e9e4-485f-aeb2-bfcd1e55d46d