112a6999

By: Michael Lynch <git@mtlynch.io>

Read browse entries from metadata.json instead of hardcoded values

Replace the hardcoded entry list in the browse handler with runtime
parsing of data/metadata.json. Add a --metadata flag to the server
(default: data/metadata.json) and thread it through Server and New().

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>