Post milestone3m

[SharonStrats]

This PR expands the v2 web component surface (new Button/Select/Combobox/PhotoCapture and introduces a manifest-driven build/export pipeline to keep webpack entries and package.json subpath exports in sync, alongside a few widget/login behavior fixes and new unit tests.

Changes:

• Introduces scripts/component-manifest.mjs + sync/watch scripts, updates webpack config to consume manifest entries, and updates package.json exports/scripts accordingly.
• Adds new Lit-based components (actions/button, forms/select, forms/combobox, media/photoCapture) with READMEs and unit tests; reorganizes v2 layout/auth component entrypoints.
• Fixes/adjusts runtime behavior: prevent concurrent checkbox updates, normalize dropped URIs and stop propagation on DnD, broaden drop targets for attachments, and harden getUserRoles() for missing session/current user.

• don't forget to bring back in user preference messaging Ticket Error cannot fetch your preferences when not logged in #464
• checkbox fix for Ticket Double click on checkbox breaks it. #124