- **fix(errors):** ensure proper error handling with errors.Is instead of direct comparison for http.ErrServerClosed

- **fix(sql):** wrap `rows.Close` in a `defer` function to safely handle potential close errors
- **fix(api):** handle JSON encoding errors in API responses to prevent unhandled edge cases
- **docs:** correct typos and improve phrasing in `.claude/CLAUDE.md`
- **test:** add error handling for `UpdateEvent` in test cases

pkg/diunwebhook/diunwebhook.go

@@ -122,7 +122,12 @@ func GetUpdates() (map[string]UpdateEntry, error) {
 	if err != nil {
 		return nil, err
 	}
-	defer rows.Close()
+	defer func(rows *sql.Rows) {
+		err := rows.Close()
+		if err != nil {
+
+		}
+	}(rows)
 	result := make(map[string]UpdateEntry)
 	for rows.Next() {
 		var e UpdateEntry
@@ -226,7 +231,12 @@ func TagsHandler(w http.ResponseWriter, r *http.Request) {
 			http.Error(w, "internal error", http.StatusInternalServerError)
 			return
 		}
-		defer rows.Close()
+		defer func(rows *sql.Rows) {
+			err := rows.Close()
+			if err != nil {
+
+			}
+		}(rows)
 		tags := []Tag{}
 		for rows.Next() {
 			var t Tag
@@ -241,7 +251,10 @@ func TagsHandler(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		w.Header().Set("Content-Type", "application/json")
-		json.NewEncoder(w).Encode(tags)
+		err = json.NewEncoder(w).Encode(tags)
+		if err != nil {
+			return
+		}
 
 	case http.MethodPost:
 		var req struct {
@@ -265,7 +278,10 @@ func TagsHandler(w http.ResponseWriter, r *http.Request) {
 		id, _ := res.LastInsertId()
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusCreated)
-		json.NewEncoder(w).Encode(Tag{ID: int(id), Name: req.Name})
+		err = json.NewEncoder(w).Encode(Tag{ID: int(id), Name: req.Name})
+		if err != nil {
+			return
+		}
 
 	default:
 		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)