fix(config): decode *bool so trailing-slash redirect binds from yaml/env

backend/core/extpoints/config_resolve.go

@@ -180,6 +180,13 @@ func formatEntryValue(value any, secret bool) string {
 	if value == nil {
 		return ""
 	}
+	rv := reflect.ValueOf(value)
+	if rv.Kind() == reflect.Ptr {
+		if rv.IsNil() {
+			return ""
+		}
+		return fmt.Sprint(rv.Elem().Interface())
+	}
 	return fmt.Sprint(value)
 }
 

backend/core/extpoints/config_test.go

@@ -224,6 +224,54 @@ func TestEntriesRedactSecretsAndReportDefaults(t *testing.T) {
 	assert.Equal(t, "86400", entries["app.session_age"].Value)
 }
 
+type optionalBoolConfig struct {
+	RedirectTrailingSlash *bool `config:"redirect_trailing_slash" env:"APP_REDIRECT_TRAILING_SLASH"`
+}
+
+func TestBindBoolPointerFromFileAndEnv(t *testing.T) {
+	t.Run("absent stays nil", func(t *testing.T) {
+		r := extpoints.NewConfigRegistry(newFakeSource())
+		require.NoError(t, r.Declare("driver_http", extpoints.ConfigBinding{Prefix: "app", Target: &optionalBoolConfig{}}))
+		require.NoError(t, r.Resolve())
+
+		var got optionalBoolConfig
+		require.NoError(t, r.Bind("app", &got))
+		assert.Nil(t, got.RedirectTrailingSlash)
+		assert.Equal(t, "", r.Origin("app.redirect_trailing_slash"))
+	})
+
+	t.Run("file false", func(t *testing.T) {
+		src := newFakeSource()
+		src.values["app.redirect_trailing_slash"] = false
+
+		r := extpoints.NewConfigRegistry(src)
+		require.NoError(t, r.Declare("driver_http", extpoints.ConfigBinding{Prefix: "app", Target: &optionalBoolConfig{}}))
+		require.NoError(t, r.Resolve())
+
+		var got optionalBoolConfig
+		require.NoError(t, r.Bind("app", &got))
+		require.NotNil(t, got.RedirectTrailingSlash)
+		assert.False(t, *got.RedirectTrailingSlash)
+		assert.Equal(t, extpoints.OriginFile, r.Origin("app.redirect_trailing_slash"))
+		assert.False(t, r.Bool("app.redirect_trailing_slash", true))
+	})
+
+	t.Run("env false", func(t *testing.T) {
+		src := newFakeSource()
+		src.env["APP_REDIRECT_TRAILING_SLASH"] = "false"
+
+		r := extpoints.NewConfigRegistry(src)
+		require.NoError(t, r.Declare("driver_http", extpoints.ConfigBinding{Prefix: "app", Target: &optionalBoolConfig{}}))
+		require.NoError(t, r.Resolve())
+
+		var got optionalBoolConfig
+		require.NoError(t, r.Bind("app", &got))
+		require.NotNil(t, got.RedirectTrailingSlash)
+		assert.False(t, *got.RedirectTrailingSlash)
+		assert.Equal(t, extpoints.OriginEnv, r.Origin("app.redirect_trailing_slash"))
+	})
+}
+
 func TestBindRejectsReadsBeforeSourceIsRegistered(t *testing.T) {
 	r := extpoints.NewConfigRegistry(nil)
 	require.NoError(t, r.Declare("cache", extpoints.ConfigBinding{Prefix: "redis", Target: &redisConfig{}}))

backend/core/extpoints/config_value.go

@@ -33,15 +33,38 @@ func convertValue(raw any, typ reflect.Type) (any, error) {
 		return convertSlice(raw, typ)
 	case reflect.Struct:
 		return convertStruct(raw, typ)
+	case reflect.Ptr:
+		return convertPointer(raw, typ)
 	default:
 		return nil, fmt.Errorf("%w: %s is not a supported configuration type", ErrConfigType, typ)
 	}
 }
 
+// convertPointer decodes into the element type and returns a non-nil pointer to it.
+// Nested pointers are rejected so configuration tags stay one level deep.
+func convertPointer(raw any, typ reflect.Type) (any, error) {
+	elemType := typ.Elem()
+	if elemType.Kind() == reflect.Ptr {
+		return nil, fmt.Errorf("%w: %s is not a supported configuration type", ErrConfigType, typ)
+	}
+	elem, err := convertValue(raw, elemType)
+	if err != nil {
+		return nil, err
+	}
+	ptr := reflect.New(elemType)
+	ptr.Elem().Set(reflect.ValueOf(elem))
+	return ptr.Interface(), nil
+}
+
 func convertBool(raw any) (any, error) {
 	switch v := raw.(type) {
 	case bool:
 		return v, nil
+	case *bool:
+		if v == nil {
+			return nil, fmt.Errorf("%w: nil *bool is not a boolean", ErrConfigType)
+		}
+		return *v, nil
 	case string:
 		parsed, err := strconv.ParseBool(strings.TrimSpace(v))
 		if err != nil {

backend/plugins/drivers/driver_http/engine_slash_test.go

@@ -3,7 +3,11 @@
 
 package driver_http
 
-import "testing"
+import (
+	"testing"
+
+	"Wavelet/core/extpoints"
+)
 
 func TestBuildEngineDefaultRedirectsTrailingSlash(t *testing.T) {
 	eng, err := BuildEngineWithConfig(httpAppConfig{}, httpRedisConfig{})
@@ -25,4 +29,85 @@ func TestBuildEngineCanDisableRedirectTrailingSlash(t *testing.T) {
 	}
 }
 
+func TestBindAppConfigDefaultKeepsTrailingSlashRedirect(t *testing.T) {
+	cfg := bindAppConfig(t, map[string]any{}, map[string]string{})
+	if cfg.RedirectTrailingSlash != nil {
+		t.Fatal("absent redirect_trailing_slash must leave *bool nil")
+	}
+	eng, err := BuildEngineWithConfig(cfg, httpRedisConfig{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !eng.RedirectTrailingSlash {
+		t.Fatal("default RedirectTrailingSlash must be true after Bind")
+	}
+}
+
+func TestBindAppConfigCanDisableTrailingSlashRedirect(t *testing.T) {
+	cfg := bindAppConfig(t, map[string]any{"app.redirect_trailing_slash": false}, nil)
+	if cfg.RedirectTrailingSlash == nil || *cfg.RedirectTrailingSlash {
+		t.Fatal("yaml false must bind *false")
+	}
+	eng, err := BuildEngineWithConfig(cfg, httpRedisConfig{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if eng.RedirectTrailingSlash {
+		t.Fatal("RedirectTrailingSlash must honor bound false")
+	}
+}
+
+func TestBindAppConfigEnvCanDisableTrailingSlashRedirect(t *testing.T) {
+	cfg := bindAppConfig(t, nil, map[string]string{"APP_REDIRECT_TRAILING_SLASH": "false"})
+	if cfg.RedirectTrailingSlash == nil || *cfg.RedirectTrailingSlash {
+		t.Fatal("env false must bind *false")
+	}
+	eng, err := BuildEngineWithConfig(cfg, httpRedisConfig{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if eng.RedirectTrailingSlash {
+		t.Fatal("RedirectTrailingSlash must honor env-bound false")
+	}
+}
+
+type slashConfigSource struct {
+	values map[string]any
+	env    map[string]string
+}
+
+func (s slashConfigSource) Lookup(path string) (any, bool) {
+	v, ok := s.values[path]
+	return v, ok
+}
+
+func (s slashConfigSource) LookupEnv(name string) (string, bool) {
+	v, ok := s.env[name]
+	return v, ok
+}
+
+func (s slashConfigSource) Describe() string { return "slash-test" }
+
+func bindAppConfig(t *testing.T, values map[string]any, env map[string]string) httpAppConfig {
+	t.Helper()
+	if values == nil {
+		values = map[string]any{}
+	}
+	if env == nil {
+		env = map[string]string{}
+	}
+	r := extpoints.NewConfigRegistry(slashConfigSource{values: values, env: env})
+	if err := r.Declare("driver_http", extpoints.ConfigBinding{Prefix: "app", Target: &httpAppConfig{}}); err != nil {
+		t.Fatal(err)
+	}
+	if err := r.Resolve(); err != nil {
+		t.Fatal(err)
+	}
+	var cfg httpAppConfig
+	if err := r.Bind("app", &cfg); err != nil {
+		t.Fatal(err)
+	}
+	return cfg
+}
+
 func boolPtr(v bool) *bool { return &v }