Add proper directory handling to LoadUserConfig

When the user config path resolves to a directory, return default config values instead of attempting to read it as a file. This makes the config loading more robust by gracefully handling directory paths.

app/user_config.go

@@ -10,13 +10,10 @@ import (
 )
 
 var userConfigSchema = func() string {
-	schema, err := hcl.Schema(&UserConfig{})
-	if err != nil {
-		return ""
-	}
+	schema := hcl.MustSchema(&UserConfig{})
 	data, err := hcl.MarshalAST(schema)
 	if err != nil {
-		return ""
+		panic(err)
 	}
 	return string(data)
 }()
@@ -36,10 +33,21 @@ func LoadUserConfig(configPath string) (UserConfig, error) {
 	// always return a valid config on error, with defaults set.
 	_ = hcl.Unmarshal([]byte{}, &config)
 
-	data, err := os.ReadFile(kong.ExpandPath(configPath))
-	if os.IsNotExist(err) {
+	expandedPath := kong.ExpandPath(configPath)
+	info, err := os.Stat(expandedPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return config, nil
+		}
+		return config, errors.WithStack(err)
+	}
+
+	if info.IsDir() {
 		return config, nil
-	} else if err != nil {
+	}
+
+	data, err := os.ReadFile(expandedPath)
+	if err != nil {
 		return config, errors.WithStack(err)
 	}
 	err = hcl.Unmarshal(data, &config)
@@ -71,6 +79,9 @@ func (u *userConfigResolver) Resolve(context *kong.Context, parent *kong.Path, f
 	case "idea":
 		return u.config.Idea, nil
 
+	case "init-sources":
+		return u.config.InitSources, nil
+
 	default:
 		return nil, nil
 	}