refactor: framework modules log through diary components

- Each module logs through diary.For(<package>): cabana, lagoon, attach, cooler, postcard, beachcomber, lighthouse, centrifugo, flare, phrasebook, wristband, bouncer
- App-published *slog.Logger overrides stay first; messages and attributes unchanged
- sunscreen: InstallDefault documented as the compatibility entry point; diary wraps every channel
- READMEs list diary as a dependency; logging docs: plugins use diary.For

modules/flare/README.md

@@ -138,7 +138,7 @@ if err := app.Publish[flare.SubscriptionSource](blogSubscriptions{db: gdb}); err
 
 ## Dependencies
 
-- `backpack`, `bonfire` and `compass` from this repository.
+- `backpack`, `bonfire`, `compass` and `diary` (component logger `flare` when the app publishes no logger) from this repository.
 - `github.com/golang-jwt/jwt/v5` (the ES256 VAPID token).
 - Everything else is the standard library: `crypto/ecdh`, `crypto/ecdsa`, `crypto/hkdf`, `crypto/aes`, `crypto/cipher` and `net/http`. No Web Push library is used.
 

modules/flare/flare.go

@@ -21,8 +21,13 @@ import (
 
 	"git.golem15.com/golem15/summercms/modules/backpack"
 	"git.golem15.com/golem15/summercms/modules/compass"
+	"git.golem15.com/golem15/summercms/modules/diary"
 )
 
+// moduleLog is flare's logger: records carry component=flare and follow
+// log.components.flare (diary).
+var moduleLog = diary.For("flare")
+
 // DefaultTTL is how long a push service keeps an undelivered message when
 // push.ttl is not set: four weeks.
 const DefaultTTL = 2419200 * time.Second
@@ -267,10 +272,11 @@ func (s *Service) SetHTTPClient(hc *http.Client) {
 	s.pusher = NewVAPIDPusher(s.cfg, hc)
 }
 
-// Logger returns the app logger.
+// Logger returns the app logger: the logger the application published, else
+// the flare component logger.
 func (s *Service) Logger() *slog.Logger {
 	if s == nil || s.log == nil {
-		return slog.Default()
+		return moduleLog
 	}
 	return s.log
 }
@@ -419,5 +425,5 @@ func loggerFromApp(app *backpack.App) *slog.Logger {
 			return log
 		}
 	}
-	return slog.Default()
+	return moduleLog
 }