feat(security): add trusted proxies and abuse event cleanup

- Add `WARPBOX_TRUSTED_PROXIES` configuration to restrict accepted forwarded client IP headers to specific proxy IPs/CIDRs, securing client IP resolution.
- Integrate `BanService` into the background cleanup job to automatically purge expired abuse and ban evidence events.
- Update documentation with reverse proxy security guidelines and a production systemd deployment guide.

backend/libs/handlers/dashboard.go

@@ -113,6 +113,8 @@ func (a *App) CreateCollection(w http.ResponseWriter, r *http.Request) {
 	}
 	if _, err := a.authService.CreateCollection(user.ID, r.FormValue("name")); err != nil {
 		a.logger.Warn("collection create failed", "source", "user_activity", "severity", "warn", "code", 4410, "user_id", user.ID, "error", err.Error())
+	} else {
+		a.logger.Info("collection created", "source", "user_activity", "severity", "user_activity", "code", 2410, "user_id", user.ID, "name", r.FormValue("name"))
 	}
 	http.Redirect(w, r, "/app", http.StatusSeeOther)
 }
@@ -127,9 +129,11 @@ func (a *App) RenameUserBox(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := a.uploadService.RenameOwnedBox(r.PathValue("boxID"), user.ID, r.FormValue("title")); err != nil {
+		a.logger.Warn("owned box rename failed", "source", "user_activity", "severity", "warn", "code", 4411, "user_id", user.ID, "box_id", r.PathValue("boxID"), "error", err.Error())
 		a.handleUserBoxError(w, r, err)
 		return
 	}
+	a.logger.Info("owned box renamed", "source", "user_activity", "severity", "user_activity", "code", 2411, "user_id", user.ID, "box_id", r.PathValue("boxID"))
 	http.Redirect(w, r, "/app", http.StatusSeeOther)
 }
 
@@ -144,13 +148,16 @@ func (a *App) MoveUserBox(w http.ResponseWriter, r *http.Request) {
 	}
 	collectionID := r.FormValue("collection_id")
 	if !a.authService.CollectionOwnedBy(collectionID, user.ID) {
+		a.logger.Warn("owned box move invalid collection", "source", "user_activity", "severity", "warn", "code", 4412, "user_id", user.ID, "box_id", r.PathValue("boxID"), "collection_id", collectionID)
 		http.Error(w, "collection not found", http.StatusForbidden)
 		return
 	}
 	if err := a.uploadService.MoveOwnedBox(r.PathValue("boxID"), user.ID, collectionID); err != nil {
+		a.logger.Warn("owned box move failed", "source", "user_activity", "severity", "warn", "code", 4413, "user_id", user.ID, "box_id", r.PathValue("boxID"), "error", err.Error())
 		a.handleUserBoxError(w, r, err)
 		return
 	}
+	a.logger.Info("owned box moved", "source", "user_activity", "severity", "user_activity", "code", 2412, "user_id", user.ID, "box_id", r.PathValue("boxID"), "collection_id", collectionID)
 	http.Redirect(w, r, "/app", http.StatusSeeOther)
 }
 
@@ -160,9 +167,11 @@ func (a *App) DeleteUserBox(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := a.uploadService.DeleteOwnedBox(r.PathValue("boxID"), user.ID); err != nil {
+		a.logger.Warn("owned box delete failed", "source", "user_activity", "severity", "warn", "code", 4414, "user_id", user.ID, "box_id", r.PathValue("boxID"), "error", err.Error())
 		a.handleUserBoxError(w, r, err)
 		return
 	}
+	a.logger.Info("owned box deleted", "source", "user_activity", "severity", "user_activity", "code", 2413, "user_id", user.ID, "box_id", r.PathValue("boxID"))
 	http.Redirect(w, r, "/app", http.StatusSeeOther)
 }