feat(web): show ICS subscription events in detail view

cmd/server/main.go

@@ -17,6 +17,7 @@ import (
 	"git.arnef.de/arnef/nidus/internal/carddav"
 	"git.arnef.de/arnef/nidus/internal/config"
 	"git.arnef.de/arnef/nidus/internal/db"
+	"git.arnef.de/arnef/nidus/internal/icssub"
 	"git.arnef.de/arnef/nidus/internal/store"
 	"git.arnef.de/arnef/nidus/internal/web"
 	filewebdav "git.arnef.de/arnef/nidus/internal/webdav"
@@ -103,10 +104,16 @@ func main() {
 	authMw := auth.NewMiddleware(cfg, dbase, logger)
 
 	// ---- Handlers ----
-	calHandler := caldav.NewHandler(cfg, st, dbase, logger)
+	// A single ICS-subscription cache is shared by both the CalDAV backend
+	// (for DAV clients) and the web UI (for the browser calendar page), so
+	// the same subscription is fetched and served identically regardless
+	// of which surface a client hits, and one background refresh refreshes
+	// both at once.
+	icsCache := icssub.NewCache(icssub.DefaultTTL)
+	calHandler := caldav.NewHandler(cfg, st, dbase, logger, icsCache)
 	cardHandler := carddav.NewHandler(cfg, st, dbase, logger)
 	fileHandler := filewebdav.NewHandler(cfg, cfg.Storage.DataDir, logger)
-	webUI := web.NewServer(cfg, st, dbase, logger)
+	webUI := web.NewServer(cfg, st, dbase, logger, icsCache)
 
 	mux := buildMux(cfg, authMw, calHandler, cardHandler, fileHandler, webUI, logger)