Custom Metadata Editor

[Rindrics]

Description

Implement unified UI for editing blog-specific metadata in custom_info.json.

Dependencies

• Issue Data Files Setup #2
• Issue Web UI Foundation #3

Tasks

• Create entry detail view
• Display merged data from references.bib + custom_info.json
• Implement edit form for custom fields
• Support adding new blog configurations
• Support adding new fields per blog
• Auto-save or explicit save button
• Push changes via GitHub API (depends on Issue GitHub App Integration #6)

UX Requirements

• User should not be aware of two separate files
• Changes to custom fields only affect custom_info.json
• BibTeX fields remain read-only in this view

Deliverables

• Entry detail/edit view
• Custom field editor
• Blog configuration management