Dev Preview (2025-07-08 09:33)

Various QoL/fixes (#30)

* Update riverpod
New mutation syntax
* Ext: refactoring
- flatten SourceHandler/parser finding
- cap cover size for cache
* Ext: manga stats
* Ext: add search by name buttons to manga view
* MD: fix revoked token exception
* Ext: source agnostic search route
* MD: add search with extensions buttons to manga view
* Ext: update chapter cache format
* Support gagaku link scheme (experimental)
* Add copy gagaku link menu item (experimental)
- Ext: rejig action bar items in manga view
* Fix/normalize IconButton theme
* MD: fix fetchRatings for single response