Host: Google Fonts commands (gfonts_*) are served for every app that sets AppConfig::with_fonts; SiteHooks::fonts_changed; commands::GFONTS, testkit::assert_fonts_guards

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/waybetter-host/src/lib.rs

@@ -54,6 +54,7 @@ pub mod backup;
 pub mod bridge;
 pub mod commands;
 pub mod devmode;
+pub mod diag;
 pub mod find;
 #[cfg(feature = "net")]
 pub mod fonts;