split handlers.py into handlers/ package
- _helpers.py: CSRF, FTS sanitizer, pagination, response helpers, tag helpers
- search.py: BM25 + hybrid search, trusted/remote result rendering
- pages.py: add/edit/delete/bulk/bookmark handlers
- subscriptions.py: sync, share preview, API sites, subscription CRUD
- customize.py: settings form, about page
- tags.py: tag list and tag browse handlers
- data.py: export, import, semantic reindex handlers
- __init__.py: dispatch, re-exports, forum_plugin, _request_local
All 58 external symbols re-exported. No changes to app.py, conftest.py,
or any test file.
94f4b2d28a