merge upstream main into fix/bug-cleanup-main

backend/ent/group.go

@@ -11,6 +11,7 @@ import (
 	"entgo.io/ent"
 	"entgo.io/ent/dialect/sql"
 	"github.com/Wei-Shaw/sub2api/ent/group"
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
 // Group is the model entity for the Group schema.
@@ -76,6 +77,8 @@ type Group struct {
 	RequirePrivacySet bool `json:"require_privacy_set,omitempty"`
 	// 默认映射模型 ID，当账号级映射找不到时使用此值
 	DefaultMappedModel string `json:"default_mapped_model,omitempty"`
+	// OpenAI Messages 调度模型配置：按 Claude 系列/精确模型映射到目标 GPT 模型
+	MessagesDispatchModelConfig domain.OpenAIMessagesDispatchModelConfig `json:"messages_dispatch_model_config,omitempty"`
 	// Edges holds the relations/edges for other nodes in the graph.
 	// The values are being populated by the GroupQuery when eager-loading is set.
 	Edges        GroupEdges `json:"edges"`
@@ -182,7 +185,7 @@ func (*Group) scanValues(columns []string) ([]any, error) {
 	values := make([]any, len(columns))
 	for i := range columns {
 		switch columns[i] {
-		case group.FieldModelRouting, group.FieldSupportedModelScopes:
+		case group.FieldModelRouting, group.FieldSupportedModelScopes, group.FieldMessagesDispatchModelConfig:
 			values[i] = new([]byte)
 		case group.FieldIsExclusive, group.FieldClaudeCodeOnly, group.FieldModelRoutingEnabled, group.FieldMcpXMLInject, group.FieldAllowMessagesDispatch, group.FieldRequireOauthOnly, group.FieldRequirePrivacySet:
 			values[i] = new(sql.NullBool)
@@ -403,6 +406,14 @@ func (_m *Group) assignValues(columns []string, values []any) error {
 			} else if value.Valid {
 				_m.DefaultMappedModel = value.String
 			}
+		case group.FieldMessagesDispatchModelConfig:
+			if value, ok := values[i].(*[]byte); !ok {
+				return fmt.Errorf("unexpected type %T for field messages_dispatch_model_config", values[i])
+			} else if value != nil && len(*value) > 0 {
+				if err := json.Unmarshal(*value, &_m.MessagesDispatchModelConfig); err != nil {
+					return fmt.Errorf("unmarshal field messages_dispatch_model_config: %w", err)
+				}
+			}
 		default:
 			_m.selectValues.Set(columns[i], values[i])
 		}
@@ -585,6 +596,9 @@ func (_m *Group) String() string {
 	builder.WriteString(", ")
 	builder.WriteString("default_mapped_model=")
 	builder.WriteString(_m.DefaultMappedModel)
+	builder.WriteString(", ")
+	builder.WriteString("messages_dispatch_model_config=")
+	builder.WriteString(fmt.Sprintf("%v", _m.MessagesDispatchModelConfig))
 	builder.WriteByte(')')
 	return builder.String()
 }

backend/ent/group/group.go

@@ -8,6 +8,7 @@ import (
 	"entgo.io/ent"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
 const (
@@ -73,6 +74,8 @@ const (
 	FieldRequirePrivacySet = "require_privacy_set"
 	// FieldDefaultMappedModel holds the string denoting the default_mapped_model field in the database.
 	FieldDefaultMappedModel = "default_mapped_model"
+	// FieldMessagesDispatchModelConfig holds the string denoting the messages_dispatch_model_config field in the database.
+	FieldMessagesDispatchModelConfig = "messages_dispatch_model_config"
 	// EdgeAPIKeys holds the string denoting the api_keys edge name in mutations.
 	EdgeAPIKeys = "api_keys"
 	// EdgeRedeemCodes holds the string denoting the redeem_codes edge name in mutations.
@@ -177,6 +180,7 @@ var Columns = []string{
 	FieldRequireOauthOnly,
 	FieldRequirePrivacySet,
 	FieldDefaultMappedModel,
+	FieldMessagesDispatchModelConfig,
 }
 
 var (
@@ -252,6 +256,8 @@ var (
 	DefaultDefaultMappedModel string
 	// DefaultMappedModelValidator is a validator for the "default_mapped_model" field. It is called by the builders before save.
 	DefaultMappedModelValidator func(string) error
+	// DefaultMessagesDispatchModelConfig holds the default value on creation for the "messages_dispatch_model_config" field.
+	DefaultMessagesDispatchModelConfig domain.OpenAIMessagesDispatchModelConfig
 )
 
 // OrderOption defines the ordering options for the Group queries.

backend/ent/group_create.go

@@ -18,6 +18,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/usagelog"
 	"github.com/Wei-Shaw/sub2api/ent/user"
 	"github.com/Wei-Shaw/sub2api/ent/usersubscription"
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
 // GroupCreate is the builder for creating a Group entity.
@@ -410,6 +411,20 @@ func (_c *GroupCreate) SetNillableDefaultMappedModel(v *string) *GroupCreate {
 	return _c
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (_c *GroupCreate) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupCreate {
+	_c.mutation.SetMessagesDispatchModelConfig(v)
+	return _c
+}
+
+// SetNillableMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field if the given value is not nil.
+func (_c *GroupCreate) SetNillableMessagesDispatchModelConfig(v *domain.OpenAIMessagesDispatchModelConfig) *GroupCreate {
+	if v != nil {
+		_c.SetMessagesDispatchModelConfig(*v)
+	}
+	return _c
+}
+
 // AddAPIKeyIDs adds the "api_keys" edge to the APIKey entity by IDs.
 func (_c *GroupCreate) AddAPIKeyIDs(ids ...int64) *GroupCreate {
 	_c.mutation.AddAPIKeyIDs(ids...)
@@ -611,6 +626,10 @@ func (_c *GroupCreate) defaults() error {
 		v := group.DefaultDefaultMappedModel
 		_c.mutation.SetDefaultMappedModel(v)
 	}
+	if _, ok := _c.mutation.MessagesDispatchModelConfig(); !ok {
+		v := group.DefaultMessagesDispatchModelConfig
+		_c.mutation.SetMessagesDispatchModelConfig(v)
+	}
 	return nil
 }
 
@@ -695,6 +714,9 @@ func (_c *GroupCreate) check() error {
 			return &ValidationError{Name: "default_mapped_model", err: fmt.Errorf(`ent: validator failed for field "Group.default_mapped_model": %w`, err)}
 		}
 	}
+	if _, ok := _c.mutation.MessagesDispatchModelConfig(); !ok {
+		return &ValidationError{Name: "messages_dispatch_model_config", err: errors.New(`ent: missing required field "Group.messages_dispatch_model_config"`)}
+	}
 	return nil
 }
 
@@ -838,6 +860,10 @@ func (_c *GroupCreate) createSpec() (*Group, *sqlgraph.CreateSpec) {
 		_spec.SetField(group.FieldDefaultMappedModel, field.TypeString, value)
 		_node.DefaultMappedModel = value
 	}
+	if value, ok := _c.mutation.MessagesDispatchModelConfig(); ok {
+		_spec.SetField(group.FieldMessagesDispatchModelConfig, field.TypeJSON, value)
+		_node.MessagesDispatchModelConfig = value
+	}
 	if nodes := _c.mutation.APIKeysIDs(); len(nodes) > 0 {
 		edge := &sqlgraph.EdgeSpec{
 			Rel:     sqlgraph.O2M,
@@ -1462,6 +1488,18 @@ func (u *GroupUpsert) UpdateDefaultMappedModel() *GroupUpsert {
 	return u
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (u *GroupUpsert) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupUpsert {
+	u.Set(group.FieldMessagesDispatchModelConfig, v)
+	return u
+}
+
+// UpdateMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field to the value that was provided on create.
+func (u *GroupUpsert) UpdateMessagesDispatchModelConfig() *GroupUpsert {
+	u.SetExcluded(group.FieldMessagesDispatchModelConfig)
+	return u
+}
+
 // UpdateNewValues updates the mutable fields using the new values that were set on create.
 // Using this option is equivalent to using:
 //
@@ -2053,6 +2091,20 @@ func (u *GroupUpsertOne) UpdateDefaultMappedModel() *GroupUpsertOne {
 	})
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (u *GroupUpsertOne) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupUpsertOne {
+	return u.Update(func(s *GroupUpsert) {
+		s.SetMessagesDispatchModelConfig(v)
+	})
+}
+
+// UpdateMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field to the value that was provided on create.
+func (u *GroupUpsertOne) UpdateMessagesDispatchModelConfig() *GroupUpsertOne {
+	return u.Update(func(s *GroupUpsert) {
+		s.UpdateMessagesDispatchModelConfig()
+	})
+}
+
 // Exec executes the query.
 func (u *GroupUpsertOne) Exec(ctx context.Context) error {
 	if len(u.create.conflict) == 0 {
@@ -2810,6 +2862,20 @@ func (u *GroupUpsertBulk) UpdateDefaultMappedModel() *GroupUpsertBulk {
 	})
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (u *GroupUpsertBulk) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupUpsertBulk {
+	return u.Update(func(s *GroupUpsert) {
+		s.SetMessagesDispatchModelConfig(v)
+	})
+}
+
+// UpdateMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field to the value that was provided on create.
+func (u *GroupUpsertBulk) UpdateMessagesDispatchModelConfig() *GroupUpsertBulk {
+	return u.Update(func(s *GroupUpsert) {
+		s.UpdateMessagesDispatchModelConfig()
+	})
+}
+
 // Exec executes the query.
 func (u *GroupUpsertBulk) Exec(ctx context.Context) error {
 	if u.create.err != nil {

backend/ent/group_update.go

@@ -20,6 +20,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/usagelog"
 	"github.com/Wei-Shaw/sub2api/ent/user"
 	"github.com/Wei-Shaw/sub2api/ent/usersubscription"
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
 // GroupUpdate is the builder for updating Group entities.
@@ -552,6 +553,20 @@ func (_u *GroupUpdate) SetNillableDefaultMappedModel(v *string) *GroupUpdate {
 	return _u
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (_u *GroupUpdate) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupUpdate {
+	_u.mutation.SetMessagesDispatchModelConfig(v)
+	return _u
+}
+
+// SetNillableMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field if the given value is not nil.
+func (_u *GroupUpdate) SetNillableMessagesDispatchModelConfig(v *domain.OpenAIMessagesDispatchModelConfig) *GroupUpdate {
+	if v != nil {
+		_u.SetMessagesDispatchModelConfig(*v)
+	}
+	return _u
+}
+
 // AddAPIKeyIDs adds the "api_keys" edge to the APIKey entity by IDs.
 func (_u *GroupUpdate) AddAPIKeyIDs(ids ...int64) *GroupUpdate {
 	_u.mutation.AddAPIKeyIDs(ids...)
@@ -1012,6 +1027,9 @@ func (_u *GroupUpdate) sqlSave(ctx context.Context) (_node int, err error) {
 	if value, ok := _u.mutation.DefaultMappedModel(); ok {
 		_spec.SetField(group.FieldDefaultMappedModel, field.TypeString, value)
 	}
+	if value, ok := _u.mutation.MessagesDispatchModelConfig(); ok {
+		_spec.SetField(group.FieldMessagesDispatchModelConfig, field.TypeJSON, value)
+	}
 	if _u.mutation.APIKeysCleared() {
 		edge := &sqlgraph.EdgeSpec{
 			Rel:     sqlgraph.O2M,
@@ -1843,6 +1861,20 @@ func (_u *GroupUpdateOne) SetNillableDefaultMappedModel(v *string) *GroupUpdateO
 	return _u
 }
 
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (_u *GroupUpdateOne) SetMessagesDispatchModelConfig(v domain.OpenAIMessagesDispatchModelConfig) *GroupUpdateOne {
+	_u.mutation.SetMessagesDispatchModelConfig(v)
+	return _u
+}
+
+// SetNillableMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field if the given value is not nil.
+func (_u *GroupUpdateOne) SetNillableMessagesDispatchModelConfig(v *domain.OpenAIMessagesDispatchModelConfig) *GroupUpdateOne {
+	if v != nil {
+		_u.SetMessagesDispatchModelConfig(*v)
+	}
+	return _u
+}
+
 // AddAPIKeyIDs adds the "api_keys" edge to the APIKey entity by IDs.
 func (_u *GroupUpdateOne) AddAPIKeyIDs(ids ...int64) *GroupUpdateOne {
 	_u.mutation.AddAPIKeyIDs(ids...)
@@ -2333,6 +2365,9 @@ func (_u *GroupUpdateOne) sqlSave(ctx context.Context) (_node *Group, err error)
 	if value, ok := _u.mutation.DefaultMappedModel(); ok {
 		_spec.SetField(group.FieldDefaultMappedModel, field.TypeString, value)
 	}
+	if value, ok := _u.mutation.MessagesDispatchModelConfig(); ok {
+		_spec.SetField(group.FieldMessagesDispatchModelConfig, field.TypeJSON, value)
+	}
 	if _u.mutation.APIKeysCleared() {
 		edge := &sqlgraph.EdgeSpec{
 			Rel:     sqlgraph.O2M,

backend/ent/migrate/schema.go

@@ -407,6 +407,7 @@ var (
 		{Name: "require_oauth_only", Type: field.TypeBool, Default: false},
 		{Name: "require_privacy_set", Type: field.TypeBool, Default: false},
 		{Name: "default_mapped_model", Type: field.TypeString, Size: 100, Default: ""},
+		{Name: "messages_dispatch_model_config", Type: field.TypeJSON, SchemaType: map[string]string{"postgres": "jsonb"}},
 	}
 	// GroupsTable holds the schema information for the "groups" table.
 	GroupsTable = &schema.Table{

backend/ent/mutation.go

@@ -8246,6 +8246,7 @@ type GroupMutation struct {
 	require_oauth_only                      *bool
 	require_privacy_set                     *bool
 	default_mapped_model                    *string
+	messages_dispatch_model_config          *domain.OpenAIMessagesDispatchModelConfig
 	clearedFields                           map[string]struct{}
 	api_keys                                map[int64]struct{}
 	removedapi_keys                         map[int64]struct{}
@@ -9798,6 +9799,42 @@ func (m *GroupMutation) ResetDefaultMappedModel() {
 	m.default_mapped_model = nil
 }
+// SetMessagesDispatchModelConfig sets the "messages_dispatch_model_config" field.
+func (m *GroupMutation) SetMessagesDispatchModelConfig(damdmc domain.OpenAIMessagesDispatchModelConfig) {
+	m.messages_dispatch_model_config = &damdmc
+}
+
+// MessagesDispatchModelConfig returns the value of the "messages_dispatch_model_config" field in the mutation.
+func (m *GroupMutation) MessagesDispatchModelConfig() (r domain.OpenAIMessagesDispatchModelConfig, exists bool) {
+	v := m.messages_dispatch_model_config
+	if v == nil {
+		return
+	}
+	return *v, true
+}
+
+// OldMessagesDispatchModelConfig returns the old "messages_dispatch_model_config" field's value of the Group entity.
+// If the Group object wasn't provided to the builder, the object is fetched from the database.
+// An error is returned if the mutation operation is not UpdateOne, or the database query fails.
+func (m *GroupMutation) OldMessagesDispatchModelConfig(ctx context.Context) (v domain.OpenAIMessagesDispatchModelConfig, err error) {
+	if !m.op.Is(OpUpdateOne) {
+		return v, errors.New("OldMessagesDispatchModelConfig is only allowed on UpdateOne operations")
+	}
+	if m.id == nil || m.oldValue == nil {
+		return v, errors.New("OldMessagesDispatchModelConfig requires an ID field in the mutation")
+	}
+	oldValue, err := m.oldValue(ctx)
+	if err != nil {
+		return v, fmt.Errorf("querying old value for OldMessagesDispatchModelConfig: %w", err)
+	}
+	return oldValue.MessagesDispatchModelConfig, nil
+}
+
+// ResetMessagesDispatchModelConfig resets all changes to the "messages_dispatch_model_config" field.
+func (m *GroupMutation) ResetMessagesDispatchModelConfig() {
+	m.messages_dispatch_model_config = nil
+}
+
 // AddAPIKeyIDs adds the "api_keys" edge to the APIKey entity by ids.
 func (m *GroupMutation) AddAPIKeyIDs(ids ...int64) {
 	if m.api_keys == nil {
@@ -10156,7 +10193,7 @@ func (m *GroupMutation) Type() string {
 // order to get all numeric fields that were incremented/decremented, call
 // AddedFields().
 func (m *GroupMutation) Fields() []string {
-	fields := make([]string, 0, 29)
+	fields := make([]string, 0, 30)
 	if m.created_at != nil {
 		fields = append(fields, group.FieldCreatedAt)
 	}
@@ -10244,6 +10281,9 @@ func (m *GroupMutation) Fields() []string {
 	if m.default_mapped_model != nil {
 		fields = append(fields, group.FieldDefaultMappedModel)
 	}
+	if m.messages_dispatch_model_config != nil {
+		fields = append(fields, group.FieldMessagesDispatchModelConfig)
+	}
 	return fields
 }
@@ -10310,6 +10350,8 @@ func (m *GroupMutation) Field(name string) (ent.Value, bool) {
 		return m.RequirePrivacySet()
 	case group.FieldDefaultMappedModel:
 		return m.DefaultMappedModel()
+	case group.FieldMessagesDispatchModelConfig:
+		return m.MessagesDispatchModelConfig()
 	}
 	return nil, false
 }
@@ -10377,6 +10419,8 @@ func (m *GroupMutation) OldField(ctx context.Context, name string) (ent.Value, e
 		return m.OldRequirePrivacySet(ctx)
 	case group.FieldDefaultMappedModel:
 		return m.OldDefaultMappedModel(ctx)
+	case group.FieldMessagesDispatchModelConfig:
+		return m.OldMessagesDispatchModelConfig(ctx)
 	}
 	return nil, fmt.Errorf("unknown Group field %s", name)
 }
@@ -10589,6 +10633,13 @@ func (m *GroupMutation) SetField(name string, value ent.Value) error {
 		}
 		m.SetDefaultMappedModel(v)
 		return nil
+	case group.FieldMessagesDispatchModelConfig:
+		v, ok := value.(domain.OpenAIMessagesDispatchModelConfig)
+		if !ok {
+			return fmt.Errorf("unexpected type %T for field %s", value, name)
+		}
+		m.SetMessagesDispatchModelConfig(v)
+		return nil
 	}
 	return fmt.Errorf("unknown Group field %s", name)
 }
@@ -10929,6 +10980,9 @@ func (m *GroupMutation) ResetField(name string) error {
 	case group.FieldDefaultMappedModel:
 		m.ResetDefaultMappedModel()
 		return nil
+	case group.FieldMessagesDispatchModelConfig:
+		m.ResetMessagesDispatchModelConfig()
+		return nil
 	}
 	return fmt.Errorf("unknown Group field %s", name)
 }

backend/ent/runtime/runtime.go

@@ -28,6 +28,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/userattributedefinition"
 	"github.com/Wei-Shaw/sub2api/ent/userattributevalue"
 	"github.com/Wei-Shaw/sub2api/ent/usersubscription"
+	"github.com/Wei-Shaw/sub2api/internal/domain"
 )
 
 // The init function reads all schema descriptors with runtime code
@@ -468,6 +469,10 @@ func init() {
 	group.DefaultDefaultMappedModel = groupDescDefaultMappedModel.Default.(string)
 	// group.DefaultMappedModelValidator is a validator for the "default_mapped_model" field. It is called by the builders before save.
 	group.DefaultMappedModelValidator = groupDescDefaultMappedModel.Validators[0].(func(string) error)
+	// groupDescMessagesDispatchModelConfig is the schema descriptor for messages_dispatch_model_config field.
+	groupDescMessagesDispatchModelConfig := groupFields[26].Descriptor()
+	// group.DefaultMessagesDispatchModelConfig holds the default value on creation for the messages_dispatch_model_config field.
+	group.DefaultMessagesDispatchModelConfig = groupDescMessagesDispatchModelConfig.Default.(domain.OpenAIMessagesDispatchModelConfig)
 	idempotencyrecordMixin := schema.IdempotencyRecord{}.Mixin()
 	idempotencyrecordMixinFields0 := idempotencyrecordMixin[0].Fields()
 	_ = idempotencyrecordMixinFields0

backend/ent/schema/group.go

@@ -141,6 +141,10 @@ func (Group) Fields() []ent.Field {
 			MaxLen(100).
 			Default("").
 			Comment("默认映射模型 ID，当账号级映射找不到时使用此值"),
+		field.JSON("messages_dispatch_model_config", domain.OpenAIMessagesDispatchModelConfig{}).
+			Default(domain.OpenAIMessagesDispatchModelConfig{}).
+			SchemaType(map[string]string{dialect.Postgres: "jsonb"}).
+			Comment("OpenAI Messages 调度模型配置：按 Claude 系列/精确模型映射到目标 GPT 模型"),
 	}
 }
 

backend/internal/config/config.go

@@ -65,6 +65,7 @@ type Config struct {
 	JWT                     JWTConfig                     `mapstructure:"jwt"`
 	Totp                    TotpConfig                    `mapstructure:"totp"`
 	LinuxDo                 LinuxDoConnectConfig          `mapstructure:"linuxdo_connect"`
+	OIDC                    OIDCConnectConfig             `mapstructure:"oidc_connect"`
 	Default                 DefaultConfig                 `mapstructure:"default"`
 	RateLimit               RateLimitConfig               `mapstructure:"rate_limit"`
 	Pricing                 PricingConfig                 `mapstructure:"pricing"`
@@ -184,6 +185,34 @@ type LinuxDoConnectConfig struct {
 	UserInfoUsernamePath string `mapstructure:"userinfo_username_path"`
 }
 
+type OIDCConnectConfig struct {
+	Enabled              bool   `mapstructure:"enabled"`
+	ProviderName         string `mapstructure:"provider_name"` // 显示名: "Keycloak" 等
+	ClientID             string `mapstructure:"client_id"`
+	ClientSecret         string `mapstructure:"client_secret"`
+	IssuerURL            string `mapstructure:"issuer_url"`
+	DiscoveryURL         string `mapstructure:"discovery_url"`
+	AuthorizeURL         string `mapstructure:"authorize_url"`
+	TokenURL             string `mapstructure:"token_url"`
+	UserInfoURL          string `mapstructure:"userinfo_url"`
+	JWKSURL              string `mapstructure:"jwks_url"`
+	Scopes               string `mapstructure:"scopes"`                // 默认 "openid email profile"
+	RedirectURL          string `mapstructure:"redirect_url"`          // 后端回调地址（需在提供方后台登记）
+	FrontendRedirectURL  string `mapstructure:"frontend_redirect_url"` // 前端接收 token 的路由（默认：/auth/oidc/callback）
+	TokenAuthMethod      string `mapstructure:"token_auth_method"`     // client_secret_post / client_secret_basic / none
+	UsePKCE              bool   `mapstructure:"use_pkce"`
+	ValidateIDToken      bool   `mapstructure:"validate_id_token"`
+	AllowedSigningAlgs   string `mapstructure:"allowed_signing_algs"`   // 默认 "RS256,ES256,PS256"
+	ClockSkewSeconds     int    `mapstructure:"clock_skew_seconds"`     // 默认 120
+	RequireEmailVerified bool   `mapstructure:"require_email_verified"` // 默认 false
+
+	// 可选：用于从 userinfo JSON 中提取字段的 gjson 路径。
+	// 为空时，服务端会尝试一组常见字段名。
+	UserInfoEmailPath    string `mapstructure:"userinfo_email_path"`
+	UserInfoIDPath       string `mapstructure:"userinfo_id_path"`
+	UserInfoUsernamePath string `mapstructure:"userinfo_username_path"`
+}
+
 // TokenRefreshConfig OAuth token自动刷新配置
 type TokenRefreshConfig struct {
 	// 是否启用自动刷新
@@ -318,6 +347,12 @@ type GatewayConfig struct {
 	// ForceCodexCLI: 强制将 OpenAI `/v1/responses` 请求按 Codex CLI 处理。
 	// 用于网关未透传/改写 User-Agent 时的兼容兜底（默认关闭，避免影响其他客户端）。
 	ForceCodexCLI bool `mapstructure:"force_codex_cli"`
+	// ForcedCodexInstructionsTemplateFile: 服务端强制附加到 Codex 顶层 instructions 的模板文件路径。
+	// 模板渲染后会直接覆盖最终 instructions；若需要保留客户端 system 转换结果，请在模板中显式引用 {{ .ExistingInstructions }}。
+	ForcedCodexInstructionsTemplateFile string `mapstructure:"forced_codex_instructions_template_file"`
+	// ForcedCodexInstructionsTemplate: 启动时从模板文件读取并缓存的模板内容。
+	// 该字段不直接参与配置反序列化，仅用于请求热路径避免重复读盘。
+	ForcedCodexInstructionsTemplate string `mapstructure:"-"`
 	// OpenAIPassthroughAllowTimeoutHeaders: OpenAI 透传模式是否放行客户端超时头
 	// 关闭（默认）可避免 x-stainless-timeout 等头导致上游提前断流。
 	OpenAIPassthroughAllowTimeoutHeaders bool `mapstructure:"openai_passthrough_allow_timeout_headers"`
@@ -972,6 +1007,23 @@ func load(allowMissingJWTSecret bool) (*Config, error) {
 	cfg.LinuxDo.UserInfoEmailPath = strings.TrimSpace(cfg.LinuxDo.UserInfoEmailPath)
 	cfg.LinuxDo.UserInfoIDPath = strings.TrimSpace(cfg.LinuxDo.UserInfoIDPath)
 	cfg.LinuxDo.UserInfoUsernamePath = strings.TrimSpace(cfg.LinuxDo.UserInfoUsernamePath)
+	cfg.OIDC.ProviderName = strings.TrimSpace(cfg.OIDC.ProviderName)
+	cfg.OIDC.ClientID = strings.TrimSpace(cfg.OIDC.ClientID)
+	cfg.OIDC.ClientSecret = strings.TrimSpace(cfg.OIDC.ClientSecret)
+	cfg.OIDC.IssuerURL = strings.TrimSpace(cfg.OIDC.IssuerURL)
+	cfg.OIDC.DiscoveryURL = strings.TrimSpace(cfg.OIDC.DiscoveryURL)
+	cfg.OIDC.AuthorizeURL = strings.TrimSpace(cfg.OIDC.AuthorizeURL)
+	cfg.OIDC.TokenURL = strings.TrimSpace(cfg.OIDC.TokenURL)
+	cfg.OIDC.UserInfoURL = strings.TrimSpace(cfg.OIDC.UserInfoURL)
+	cfg.OIDC.JWKSURL = strings.TrimSpace(cfg.OIDC.JWKSURL)
+	cfg.OIDC.Scopes = strings.TrimSpace(cfg.OIDC.Scopes)
+	cfg.OIDC.RedirectURL = strings.TrimSpace(cfg.OIDC.RedirectURL)
+	cfg.OIDC.FrontendRedirectURL = strings.TrimSpace(cfg.OIDC.FrontendRedirectURL)
+	cfg.OIDC.TokenAuthMethod = strings.ToLower(strings.TrimSpace(cfg.OIDC.TokenAuthMethod))
+	cfg.OIDC.AllowedSigningAlgs = strings.TrimSpace(cfg.OIDC.AllowedSigningAlgs)
+	cfg.OIDC.UserInfoEmailPath = strings.TrimSpace(cfg.OIDC.UserInfoEmailPath)
+	cfg.OIDC.UserInfoIDPath = strings.TrimSpace(cfg.OIDC.UserInfoIDPath)
+	cfg.OIDC.UserInfoUsernamePath = strings.TrimSpace(cfg.OIDC.UserInfoUsernamePath)
 	cfg.Dashboard.KeyPrefix = strings.TrimSpace(cfg.Dashboard.KeyPrefix)
 	cfg.CORS.AllowedOrigins = normalizeStringSlice(cfg.CORS.AllowedOrigins)
 	cfg.Security.ResponseHeaders.AdditionalAllowed = normalizeStringSlice(cfg.Security.ResponseHeaders.AdditionalAllowed)
@@ -983,6 +1035,14 @@ func load(allowMissingJWTSecret bool) (*Config, error) {
 	cfg.Log.Environment = strings.TrimSpace(cfg.Log.Environment)
 	cfg.Log.StacktraceLevel = strings.ToLower(strings.TrimSpace(cfg.Log.StacktraceLevel))
 	cfg.Log.Output.FilePath = strings.TrimSpace(cfg.Log.Output.FilePath)
+	cfg.Gateway.ForcedCodexInstructionsTemplateFile = strings.TrimSpace(cfg.Gateway.ForcedCodexInstructionsTemplateFile)
+	if cfg.Gateway.ForcedCodexInstructionsTemplateFile != "" {
+		content, err := os.ReadFile(cfg.Gateway.ForcedCodexInstructionsTemplateFile)
+		if err != nil {
+			return nil, fmt.Errorf("read forced codex instructions template %q: %w", cfg.Gateway.ForcedCodexInstructionsTemplateFile, err)
+		}
+		cfg.Gateway.ForcedCodexInstructionsTemplate = string(content)
+	}
 
 	// 兼容旧键 gateway.openai_ws.sticky_previous_response_ttl_seconds。
 	// 新键未配置（<=0）时回退旧键；新键优先。
@@ -1142,6 +1202,30 @@ func setDefaults() {
 	viper.SetDefault("linuxdo_connect.userinfo_id_path", "")
 	viper.SetDefault("linuxdo_connect.userinfo_username_path", "")
 
+	// Generic OIDC OAuth 登录
+	viper.SetDefault("oidc_connect.enabled", false)
+	viper.SetDefault("oidc_connect.provider_name", "OIDC")
+	viper.SetDefault("oidc_connect.client_id", "")
+	viper.SetDefault("oidc_connect.client_secret", "")
+	viper.SetDefault("oidc_connect.issuer_url", "")
+	viper.SetDefault("oidc_connect.discovery_url", "")
+	viper.SetDefault("oidc_connect.authorize_url", "")
+	viper.SetDefault("oidc_connect.token_url", "")
+	viper.SetDefault("oidc_connect.userinfo_url", "")
+	viper.SetDefault("oidc_connect.jwks_url", "")
+	viper.SetDefault("oidc_connect.scopes", "openid email profile")
+	viper.SetDefault("oidc_connect.redirect_url", "")
+	viper.SetDefault("oidc_connect.frontend_redirect_url", "/auth/oidc/callback")
+	viper.SetDefault("oidc_connect.token_auth_method", "client_secret_post")
+	viper.SetDefault("oidc_connect.use_pkce", false)
+	viper.SetDefault("oidc_connect.validate_id_token", true)
+	viper.SetDefault("oidc_connect.allowed_signing_algs", "RS256,ES256,PS256")
+	viper.SetDefault("oidc_connect.clock_skew_seconds", 120)
+	viper.SetDefault("oidc_connect.require_email_verified", false)
+	viper.SetDefault("oidc_connect.userinfo_email_path", "")
+	viper.SetDefault("oidc_connect.userinfo_id_path", "")
+	viper.SetDefault("oidc_connect.userinfo_username_path", "")
+
 	// Database
 	viper.SetDefault("database.host", "localhost")
 	viper.SetDefault("database.port", 5432)
@@ -1578,6 +1662,87 @@ func (c *Config) Validate() error {
 		warnIfInsecureURL("linuxdo_connect.redirect_url", c.LinuxDo.RedirectURL)
 		warnIfInsecureURL("linuxdo_connect.frontend_redirect_url", c.LinuxDo.FrontendRedirectURL)
 	}
+	if c.OIDC.Enabled {
+		if strings.TrimSpace(c.OIDC.ClientID) == "" {
+			return fmt.Errorf("oidc_connect.client_id is required when oidc_connect.enabled=true")
+		}
+		if strings.TrimSpace(c.OIDC.IssuerURL) == "" {
+			return fmt.Errorf("oidc_connect.issuer_url is required when oidc_connect.enabled=true")
+		}
+		if strings.TrimSpace(c.OIDC.RedirectURL) == "" {
+			return fmt.Errorf("oidc_connect.redirect_url is required when oidc_connect.enabled=true")
+		}
+		if strings.TrimSpace(c.OIDC.FrontendRedirectURL) == "" {
+			return fmt.Errorf("oidc_connect.frontend_redirect_url is required when oidc_connect.enabled=true")
+		}
+		if !scopeContainsOpenID(c.OIDC.Scopes) {
+			return fmt.Errorf("oidc_connect.scopes must contain openid")
+		}
+
+		method := strings.ToLower(strings.TrimSpace(c.OIDC.TokenAuthMethod))
+		switch method {
+		case "", "client_secret_post", "client_secret_basic", "none":
+		default:
+			return fmt.Errorf("oidc_connect.token_auth_method must be one of: client_secret_post/client_secret_basic/none")
+		}
+		if method == "none" && !c.OIDC.UsePKCE {
+			return fmt.Errorf("oidc_connect.use_pkce must be true when oidc_connect.token_auth_method=none")
+		}
+		if (method == "" || method == "client_secret_post" || method == "client_secret_basic") &&
+			strings.TrimSpace(c.OIDC.ClientSecret) == "" {
+			return fmt.Errorf("oidc_connect.client_secret is required when oidc_connect.enabled=true and token_auth_method is client_secret_post/client_secret_basic")
+		}
+		if c.OIDC.ClockSkewSeconds < 0 || c.OIDC.ClockSkewSeconds > 600 {
+			return fmt.Errorf("oidc_connect.clock_skew_seconds must be between 0 and 600")
+		}
+		if c.OIDC.ValidateIDToken && strings.TrimSpace(c.OIDC.AllowedSigningAlgs) == "" {
+			return fmt.Errorf("oidc_connect.allowed_signing_algs is required when oidc_connect.validate_id_token=true")
+		}
+
+		if err := ValidateAbsoluteHTTPURL(c.OIDC.IssuerURL); err != nil {
+			return fmt.Errorf("oidc_connect.issuer_url invalid: %w", err)
+		}
+		if v := strings.TrimSpace(c.OIDC.DiscoveryURL); v != "" {
+			if err := ValidateAbsoluteHTTPURL(v); err != nil {
+				return fmt.Errorf("oidc_connect.discovery_url invalid: %w", err)
+			}
+		}
+		if v := strings.TrimSpace(c.OIDC.AuthorizeURL); v != "" {
+			if err := ValidateAbsoluteHTTPURL(v); err != nil {
+				return fmt.Errorf("oidc_connect.authorize_url invalid: %w", err)
+			}
+		}
+		if v := strings.TrimSpace(c.OIDC.TokenURL); v != "" {
+			if err := ValidateAbsoluteHTTPURL(v); err != nil {
+				return fmt.Errorf("oidc_connect.token_url invalid: %w", err)
+			}
+		}
+		if v := strings.TrimSpace(c.OIDC.UserInfoURL); v != "" {
+			if err := ValidateAbsoluteHTTPURL(v); err != nil {
+				return fmt.Errorf("oidc_connect.userinfo_url invalid: %w", err)
+			}
+		}
+		if v := strings.TrimSpace(c.OIDC.JWKSURL); v != "" {
+			if err := ValidateAbsoluteHTTPURL(v); err != nil {
+				return fmt.Errorf("oidc_connect.jwks_url invalid: %w", err)
+			}
+		}
+		if err := ValidateAbsoluteHTTPURL(c.OIDC.RedirectURL); err != nil {
+			return fmt.Errorf("oidc_connect.redirect_url invalid: %w", err)
+		}
+		if err := ValidateFrontendRedirectURL(c.OIDC.FrontendRedirectURL); err != nil {
+			return fmt.Errorf("oidc_connect.frontend_redirect_url invalid: %w", err)
+		}
+
+		warnIfInsecureURL("oidc_connect.issuer_url", c.OIDC.IssuerURL)
+		warnIfInsecureURL("oidc_connect.discovery_url", c.OIDC.DiscoveryURL)
+		warnIfInsecureURL("oidc_connect.authorize_url", c.OIDC.AuthorizeURL)
+		warnIfInsecureURL("oidc_connect.token_url", c.OIDC.TokenURL)
+		warnIfInsecureURL("oidc_connect.userinfo_url", c.OIDC.UserInfoURL)
+		warnIfInsecureURL("oidc_connect.jwks_url", c.OIDC.JWKSURL)
+		warnIfInsecureURL("oidc_connect.redirect_url", c.OIDC.RedirectURL)
+		warnIfInsecureURL("oidc_connect.frontend_redirect_url", c.OIDC.FrontendRedirectURL)
+	}
 	if c.Billing.CircuitBreaker.Enabled {
 		if c.Billing.CircuitBreaker.FailureThreshold <= 0 {
 			return fmt.Errorf("billing.circuit_breaker.failure_threshold must be positive")
@@ -2196,6 +2361,15 @@ func ValidateFrontendRedirectURL(raw string) error {
 	return nil
 }
 
+func scopeContainsOpenID(scopes string) bool {
+	for _, scope := range strings.Fields(strings.ToLower(strings.TrimSpace(scopes))) {
+		if scope == "openid" {
+			return true
+		}
+	}
+	return false
+}
+
 // isHTTPScheme 检查是否为 HTTP 或 HTTPS 协议
 func isHTTPScheme(scheme string) bool {
 	return strings.EqualFold(scheme, "http") || strings.EqualFold(scheme, "https")

backend/internal/config/config_test.go

 package config
 
 import (
+	"os"
+	"path/filepath"
 	"strings"
 	"testing"
 	"time"
@@ -223,6 +225,23 @@ func TestLoadSchedulingConfigFromEnv(t *testing.T) {
 	}
 }
 
+func TestLoadForcedCodexInstructionsTemplate(t *testing.T) {
+	resetViperWithJWTSecret(t)
+
+	tempDir := t.TempDir()
+	templatePath := filepath.Join(tempDir, "codex-instructions.md.tmpl")
+	configPath := filepath.Join(tempDir, "config.yaml")
+
+	require.NoError(t, os.WriteFile(templatePath, []byte("server-prefix\n\n{{ .ExistingInstructions }}"), 0o644))
+	require.NoError(t, os.WriteFile(configPath, []byte("gateway:\n  forced_codex_instructions_template_file: \""+templatePath+"\"\n"), 0o644))
+	t.Setenv("DATA_DIR", tempDir)
+
+	cfg, err := Load()
+	require.NoError(t, err)
+	require.Equal(t, templatePath, cfg.Gateway.ForcedCodexInstructionsTemplateFile)
+	require.Equal(t, "server-prefix\n\n{{ .ExistingInstructions }}", cfg.Gateway.ForcedCodexInstructionsTemplate)
+}
+
 func TestLoadDefaultSecurityToggles(t *testing.T) {
 	resetViperWithJWTSecret(t)
 
@@ -351,6 +370,60 @@ func TestValidateLinuxDoPKCERequiredForPublicClient(t *testing.T) {
 	}
 }
 
+func TestValidateOIDCScopesMustContainOpenID(t *testing.T) {
+	resetViperWithJWTSecret(t)
+
+	cfg, err := Load()
+	if err != nil {
+		t.Fatalf("Load() error: %v", err)
+	}
+
+	cfg.OIDC.Enabled = true
+	cfg.OIDC.ClientID = "oidc-client"
+	cfg.OIDC.ClientSecret = "oidc-secret"
+	cfg.OIDC.IssuerURL = "https://issuer.example.com"
+	cfg.OIDC.AuthorizeURL = "https://issuer.example.com/auth"
+	cfg.OIDC.TokenURL = "https://issuer.example.com/token"
+	cfg.OIDC.JWKSURL = "https://issuer.example.com/jwks"
+	cfg.OIDC.RedirectURL = "https://example.com/api/v1/auth/oauth/oidc/callback"
+	cfg.OIDC.FrontendRedirectURL = "/auth/oidc/callback"
+	cfg.OIDC.Scopes = "profile email"
+
+	err = cfg.Validate()
+	if err == nil {
+		t.Fatalf("Validate() expected error when scopes do not include openid, got nil")
+	}
+	if !strings.Contains(err.Error(), "oidc_connect.scopes") {
+		t.Fatalf("Validate() expected oidc_connect.scopes error, got: %v", err)
+	}
+}
+
+func TestValidateOIDCAllowsIssuerOnlyEndpointsWithDiscoveryFallback(t *testing.T) {
+	resetViperWithJWTSecret(t)
+
+	cfg, err := Load()
+	if err != nil {
+		t.Fatalf("Load() error: %v", err)
+	}
+
+	cfg.OIDC.Enabled = true
+	cfg.OIDC.ClientID = "oidc-client"
+	cfg.OIDC.ClientSecret = "oidc-secret"
+	cfg.OIDC.IssuerURL = "https://issuer.example.com"
+	cfg.OIDC.AuthorizeURL = ""
+	cfg.OIDC.TokenURL = ""
+	cfg.OIDC.JWKSURL = ""
+	cfg.OIDC.RedirectURL = "https://example.com/api/v1/auth/oauth/oidc/callback"
+	cfg.OIDC.FrontendRedirectURL = "/auth/oidc/callback"
+	cfg.OIDC.Scopes = "openid email profile"
+	cfg.OIDC.ValidateIDToken = true
+
+	err = cfg.Validate()
+	if err != nil {
+		t.Fatalf("Validate() expected issuer-only OIDC config to pass with discovery fallback, got: %v", err)
+	}
+}
+
 func TestLoadDefaultDashboardCacheConfig(t *testing.T) {
 	resetViperWithJWTSecret(t)
 

backend/internal/domain/openai_messages_dispatch.go

+package domain
+
+// OpenAIMessagesDispatchModelConfig controls how Anthropic /v1/messages
+// requests are mapped onto OpenAI/Codex models.
+type OpenAIMessagesDispatchModelConfig struct {
+	OpusMappedModel    string            `json:"opus_mapped_model,omitempty"`
+	SonnetMappedModel  string            `json:"sonnet_mapped_model,omitempty"`
+	HaikuMappedModel   string            `json:"haiku_mapped_model,omitempty"`
+	ExactModelMappings map[string]string `json:"exact_model_mappings,omitempty"`
+}

backend/internal/handler/admin/group_handler.go

@@ -109,6 +109,7 @@ type CreateGroupRequest struct {
 	RequireOAuthOnly            bool                                      `json:"require_oauth_only"`
 	RequirePrivacySet           bool                                      `json:"require_privacy_set"`
 	DefaultMappedModel          string                                    `json:"default_mapped_model"`
+	MessagesDispatchModelConfig service.OpenAIMessagesDispatchModelConfig `json:"messages_dispatch_model_config"`
 	// 从指定分组复制账号（创建后自动绑定）
 	CopyAccountsFromGroupIDs []int64 `json:"copy_accounts_from_group_ids"`
 }
@@ -143,6 +144,7 @@ type UpdateGroupRequest struct {
 	RequireOAuthOnly            *bool                                      `json:"require_oauth_only"`
 	RequirePrivacySet           *bool                                      `json:"require_privacy_set"`
 	DefaultMappedModel          *string                                    `json:"default_mapped_model"`
+	MessagesDispatchModelConfig *service.OpenAIMessagesDispatchModelConfig `json:"messages_dispatch_model_config"`
 	// 从指定分组复制账号（同步操作：先清空当前分组的账号绑定，再绑定源分组的账号）
 	CopyAccountsFromGroupIDs []int64 `json:"copy_accounts_from_group_ids"`
 }
@@ -259,6 +261,7 @@ func (h *GroupHandler) Create(c *gin.Context) {
 		RequireOAuthOnly:                req.RequireOAuthOnly,
 		RequirePrivacySet:               req.RequirePrivacySet,
 		DefaultMappedModel:              req.DefaultMappedModel,
+		MessagesDispatchModelConfig:     req.MessagesDispatchModelConfig,
 		CopyAccountsFromGroupIDs:        req.CopyAccountsFromGroupIDs,
 	})
 	if err != nil {
@@ -309,6 +312,7 @@ func (h *GroupHandler) Update(c *gin.Context) {
 		RequireOAuthOnly:                req.RequireOAuthOnly,
 		RequirePrivacySet:               req.RequirePrivacySet,
 		DefaultMappedModel:              req.DefaultMappedModel,
+		MessagesDispatchModelConfig:     req.MessagesDispatchModelConfig,
 		CopyAccountsFromGroupIDs:        req.CopyAccountsFromGroupIDs,
 	})
 	if err != nil {

backend/internal/handler/admin/setting_handler.go

@@ -35,6 +35,15 @@ func generateMenuItemID() (string, error) {
 	return hex.EncodeToString(b), nil
 }
 
+func scopesContainOpenID(scopes string) bool {
+	for _, scope := range strings.Fields(strings.ToLower(strings.TrimSpace(scopes))) {
+		if scope == "openid" {
+			return true
+		}
+	}
+	return false
+}
+
 // SettingHandler 系统设置处理器
 type SettingHandler struct {
 	settingService   *service.SettingService
@@ -96,6 +105,28 @@ func (h *SettingHandler) GetSettings(c *gin.Context) {
 		LinuxDoConnectClientID:               settings.LinuxDoConnectClientID,
 		LinuxDoConnectClientSecretConfigured: settings.LinuxDoConnectClientSecretConfigured,
 		LinuxDoConnectRedirectURL:            settings.LinuxDoConnectRedirectURL,
+		OIDCConnectEnabled:                   settings.OIDCConnectEnabled,
+		OIDCConnectProviderName:              settings.OIDCConnectProviderName,
+		OIDCConnectClientID:                  settings.OIDCConnectClientID,
+		OIDCConnectClientSecretConfigured:    settings.OIDCConnectClientSecretConfigured,
+		OIDCConnectIssuerURL:                 settings.OIDCConnectIssuerURL,
+		OIDCConnectDiscoveryURL:              settings.OIDCConnectDiscoveryURL,
+		OIDCConnectAuthorizeURL:              settings.OIDCConnectAuthorizeURL,
+		OIDCConnectTokenURL:                  settings.OIDCConnectTokenURL,
+		OIDCConnectUserInfoURL:               settings.OIDCConnectUserInfoURL,
+		OIDCConnectJWKSURL:                   settings.OIDCConnectJWKSURL,
+		OIDCConnectScopes:                    settings.OIDCConnectScopes,
+		OIDCConnectRedirectURL:               settings.OIDCConnectRedirectURL,
+		OIDCConnectFrontendRedirectURL:       settings.OIDCConnectFrontendRedirectURL,
+		OIDCConnectTokenAuthMethod:           settings.OIDCConnectTokenAuthMethod,
+		OIDCConnectUsePKCE:                   settings.OIDCConnectUsePKCE,
+		OIDCConnectValidateIDToken:           settings.OIDCConnectValidateIDToken,
+		OIDCConnectAllowedSigningAlgs:        settings.OIDCConnectAllowedSigningAlgs,
+		OIDCConnectClockSkewSeconds:          settings.OIDCConnectClockSkewSeconds,
+		OIDCConnectRequireEmailVerified:      settings.OIDCConnectRequireEmailVerified,
+		OIDCConnectUserInfoEmailPath:         settings.OIDCConnectUserInfoEmailPath,
+		OIDCConnectUserInfoIDPath:            settings.OIDCConnectUserInfoIDPath,
+		OIDCConnectUserInfoUsernamePath:      settings.OIDCConnectUserInfoUsernamePath,
 		SiteName:                             settings.SiteName,
 		SiteLogo:                             settings.SiteLogo,
 		SiteSubtitle:                         settings.SiteSubtitle,
@@ -166,6 +197,30 @@ type UpdateSettingsRequest struct {
 	LinuxDoConnectClientSecret string `json:"linuxdo_connect_client_secret"`
 	LinuxDoConnectRedirectURL  string `json:"linuxdo_connect_redirect_url"`
 
+	// Generic OIDC OAuth 登录
+	OIDCConnectEnabled              bool   `json:"oidc_connect_enabled"`
+	OIDCConnectProviderName         string `json:"oidc_connect_provider_name"`
+	OIDCConnectClientID             string `json:"oidc_connect_client_id"`
+	OIDCConnectClientSecret         string `json:"oidc_connect_client_secret"`
+	OIDCConnectIssuerURL            string `json:"oidc_connect_issuer_url"`
+	OIDCConnectDiscoveryURL         string `json:"oidc_connect_discovery_url"`
+	OIDCConnectAuthorizeURL         string `json:"oidc_connect_authorize_url"`
+	OIDCConnectTokenURL             string `json:"oidc_connect_token_url"`
+	OIDCConnectUserInfoURL          string `json:"oidc_connect_userinfo_url"`
+	OIDCConnectJWKSURL              string `json:"oidc_connect_jwks_url"`
+	OIDCConnectScopes               string `json:"oidc_connect_scopes"`
+	OIDCConnectRedirectURL          string `json:"oidc_connect_redirect_url"`
+	OIDCConnectFrontendRedirectURL  string `json:"oidc_connect_frontend_redirect_url"`
+	OIDCConnectTokenAuthMethod      string `json:"oidc_connect_token_auth_method"`
+	OIDCConnectUsePKCE              bool   `json:"oidc_connect_use_pkce"`
+	OIDCConnectValidateIDToken      bool   `json:"oidc_connect_validate_id_token"`
+	OIDCConnectAllowedSigningAlgs   string `json:"oidc_connect_allowed_signing_algs"`
+	OIDCConnectClockSkewSeconds     int    `json:"oidc_connect_clock_skew_seconds"`
+	OIDCConnectRequireEmailVerified bool   `json:"oidc_connect_require_email_verified"`
+	OIDCConnectUserInfoEmailPath    string `json:"oidc_connect_userinfo_email_path"`
+	OIDCConnectUserInfoIDPath       string `json:"oidc_connect_userinfo_id_path"`
+	OIDCConnectUserInfoUsernamePath string `json:"oidc_connect_userinfo_username_path"`
+
 	// OEM设置
 	SiteName                    string                `json:"site_name"`
 	SiteLogo                    string                `json:"site_logo"`
@@ -335,6 +390,122 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		}
 	}
 
+	// Generic OIDC 参数验证
+	if req.OIDCConnectEnabled {
+		req.OIDCConnectProviderName = strings.TrimSpace(req.OIDCConnectProviderName)
+		req.OIDCConnectClientID = strings.TrimSpace(req.OIDCConnectClientID)
+		req.OIDCConnectClientSecret = strings.TrimSpace(req.OIDCConnectClientSecret)
+		req.OIDCConnectIssuerURL = strings.TrimSpace(req.OIDCConnectIssuerURL)
+		req.OIDCConnectDiscoveryURL = strings.TrimSpace(req.OIDCConnectDiscoveryURL)
+		req.OIDCConnectAuthorizeURL = strings.TrimSpace(req.OIDCConnectAuthorizeURL)
+		req.OIDCConnectTokenURL = strings.TrimSpace(req.OIDCConnectTokenURL)
+		req.OIDCConnectUserInfoURL = strings.TrimSpace(req.OIDCConnectUserInfoURL)
+		req.OIDCConnectJWKSURL = strings.TrimSpace(req.OIDCConnectJWKSURL)
+		req.OIDCConnectScopes = strings.TrimSpace(req.OIDCConnectScopes)
+		req.OIDCConnectRedirectURL = strings.TrimSpace(req.OIDCConnectRedirectURL)
+		req.OIDCConnectFrontendRedirectURL = strings.TrimSpace(req.OIDCConnectFrontendRedirectURL)
+		req.OIDCConnectTokenAuthMethod = strings.ToLower(strings.TrimSpace(req.OIDCConnectTokenAuthMethod))
+		req.OIDCConnectAllowedSigningAlgs = strings.TrimSpace(req.OIDCConnectAllowedSigningAlgs)
+		req.OIDCConnectUserInfoEmailPath = strings.TrimSpace(req.OIDCConnectUserInfoEmailPath)
+		req.OIDCConnectUserInfoIDPath = strings.TrimSpace(req.OIDCConnectUserInfoIDPath)
+		req.OIDCConnectUserInfoUsernamePath = strings.TrimSpace(req.OIDCConnectUserInfoUsernamePath)
+
+		if req.OIDCConnectProviderName == "" {
+			req.OIDCConnectProviderName = "OIDC"
+		}
+		if req.OIDCConnectClientID == "" {
+			response.BadRequest(c, "OIDC Client ID is required when enabled")
+			return
+		}
+		if req.OIDCConnectIssuerURL == "" {
+			response.BadRequest(c, "OIDC Issuer URL is required when enabled")
+			return
+		}
+		if err := config.ValidateAbsoluteHTTPURL(req.OIDCConnectIssuerURL); err != nil {
+			response.BadRequest(c, "OIDC Issuer URL must be an absolute http(s) URL")
+			return
+		}
+		if req.OIDCConnectDiscoveryURL != "" {
+			if err := config.ValidateAbsoluteHTTPURL(req.OIDCConnectDiscoveryURL); err != nil {
+				response.BadRequest(c, "OIDC Discovery URL must be an absolute http(s) URL")
+				return
+			}
+		}
+		if req.OIDCConnectAuthorizeURL != "" {
+			if err := config.ValidateAbsoluteHTTPURL(req.OIDCConnectAuthorizeURL); err != nil {
+				response.BadRequest(c, "OIDC Authorize URL must be an absolute http(s) URL")
+				return
+			}
+		}
+		if req.OIDCConnectTokenURL != "" {
+			if err := config.ValidateAbsoluteHTTPURL(req.OIDCConnectTokenURL); err != nil {
+				response.BadRequest(c, "OIDC Token URL must be an absolute http(s) URL")
+				return
+			}
+		}
+		if req.OIDCConnectUserInfoURL != "" {
+			if err := config.ValidateAbsoluteHTTPURL(req.OIDCConnectUserInfoURL); err != nil {
+				response.BadRequest(c, "OIDC UserInfo URL must be an absolute http(s) URL")
+				return
+			}
+		}
+		if req.OIDCConnectRedirectURL == "" {
+			response.BadRequest(c, "OIDC Redirect URL is required when enabled")
+			return
+		}
+		if err := config.ValidateAbsoluteHTTPURL(req.OIDCConnectRedirectURL); err != nil {
+			response.BadRequest(c, "OIDC Redirect URL must be an absolute http(s) URL")
+			return
+		}
+		if req.OIDCConnectFrontendRedirectURL == "" {
+			response.BadRequest(c, "OIDC Frontend Redirect URL is required when enabled")
+			return
+		}
+		if err := config.ValidateFrontendRedirectURL(req.OIDCConnectFrontendRedirectURL); err != nil {
+			response.BadRequest(c, "OIDC Frontend Redirect URL is invalid")
+			return
+		}
+		if !scopesContainOpenID(req.OIDCConnectScopes) {
+			response.BadRequest(c, "OIDC scopes must contain openid")
+			return
+		}
+		switch req.OIDCConnectTokenAuthMethod {
+		case "", "client_secret_post", "client_secret_basic", "none":
+		default:
+			response.BadRequest(c, "OIDC Token Auth Method must be one of client_secret_post/client_secret_basic/none")
+			return
+		}
+		if req.OIDCConnectTokenAuthMethod == "none" && !req.OIDCConnectUsePKCE {
+			response.BadRequest(c, "OIDC PKCE must be enabled when token_auth_method=none")
+			return
+		}
+		if req.OIDCConnectClockSkewSeconds < 0 || req.OIDCConnectClockSkewSeconds > 600 {
+			response.BadRequest(c, "OIDC clock skew seconds must be between 0 and 600")
+			return
+		}
+		if req.OIDCConnectValidateIDToken {
+			if req.OIDCConnectAllowedSigningAlgs == "" {
+				response.BadRequest(c, "OIDC Allowed Signing Algs is required when validate_id_token=true")
+				return
+			}
+		}
+		if req.OIDCConnectJWKSURL != "" {
+			if err := config.ValidateAbsoluteHTTPURL(req.OIDCConnectJWKSURL); err != nil {
+				response.BadRequest(c, "OIDC JWKS URL must be an absolute http(s) URL")
+				return
+			}
+		}
+		if req.OIDCConnectTokenAuthMethod == "" || req.OIDCConnectTokenAuthMethod == "client_secret_post" || req.OIDCConnectTokenAuthMethod == "client_secret_basic" {
+			if req.OIDCConnectClientSecret == "" {
+				if previousSettings.OIDCConnectClientSecret == "" {
+					response.BadRequest(c, "OIDC Client Secret is required when enabled")
+					return
+				}
+				req.OIDCConnectClientSecret = previousSettings.OIDCConnectClientSecret
+			}
+		}
+	}
+
 	// “购买订阅”页面配置验证
 	purchaseEnabled := previousSettings.PurchaseSubscriptionEnabled
 	if req.PurchaseSubscriptionEnabled != nil {
@@ -565,6 +736,28 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		LinuxDoConnectClientID:           req.LinuxDoConnectClientID,
 		LinuxDoConnectClientSecret:       req.LinuxDoConnectClientSecret,
 		LinuxDoConnectRedirectURL:        req.LinuxDoConnectRedirectURL,
+		OIDCConnectEnabled:               req.OIDCConnectEnabled,
+		OIDCConnectProviderName:          req.OIDCConnectProviderName,
+		OIDCConnectClientID:              req.OIDCConnectClientID,
+		OIDCConnectClientSecret:          req.OIDCConnectClientSecret,
+		OIDCConnectIssuerURL:             req.OIDCConnectIssuerURL,
+		OIDCConnectDiscoveryURL:          req.OIDCConnectDiscoveryURL,
+		OIDCConnectAuthorizeURL:          req.OIDCConnectAuthorizeURL,
+		OIDCConnectTokenURL:              req.OIDCConnectTokenURL,
+		OIDCConnectUserInfoURL:           req.OIDCConnectUserInfoURL,
+		OIDCConnectJWKSURL:               req.OIDCConnectJWKSURL,
+		OIDCConnectScopes:                req.OIDCConnectScopes,
+		OIDCConnectRedirectURL:           req.OIDCConnectRedirectURL,
+		OIDCConnectFrontendRedirectURL:   req.OIDCConnectFrontendRedirectURL,
+		OIDCConnectTokenAuthMethod:       req.OIDCConnectTokenAuthMethod,
+		OIDCConnectUsePKCE:               req.OIDCConnectUsePKCE,
+		OIDCConnectValidateIDToken:       req.OIDCConnectValidateIDToken,
+		OIDCConnectAllowedSigningAlgs:    req.OIDCConnectAllowedSigningAlgs,
+		OIDCConnectClockSkewSeconds:      req.OIDCConnectClockSkewSeconds,
+		OIDCConnectRequireEmailVerified:  req.OIDCConnectRequireEmailVerified,
+		OIDCConnectUserInfoEmailPath:     req.OIDCConnectUserInfoEmailPath,
+		OIDCConnectUserInfoIDPath:        req.OIDCConnectUserInfoIDPath,
+		OIDCConnectUserInfoUsernamePath:  req.OIDCConnectUserInfoUsernamePath,
 		SiteName:                         req.SiteName,
 		SiteLogo:                         req.SiteLogo,
 		SiteSubtitle:                     req.SiteSubtitle,
@@ -682,6 +875,28 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		LinuxDoConnectClientID:               updatedSettings.LinuxDoConnectClientID,
 		LinuxDoConnectClientSecretConfigured: updatedSettings.LinuxDoConnectClientSecretConfigured,
 		LinuxDoConnectRedirectURL:            updatedSettings.LinuxDoConnectRedirectURL,
+		OIDCConnectEnabled:                   updatedSettings.OIDCConnectEnabled,
+		OIDCConnectProviderName:              updatedSettings.OIDCConnectProviderName,
+		OIDCConnectClientID:                  updatedSettings.OIDCConnectClientID,
+		OIDCConnectClientSecretConfigured:    updatedSettings.OIDCConnectClientSecretConfigured,
+		OIDCConnectIssuerURL:                 updatedSettings.OIDCConnectIssuerURL,
+		OIDCConnectDiscoveryURL:              updatedSettings.OIDCConnectDiscoveryURL,
+		OIDCConnectAuthorizeURL:              updatedSettings.OIDCConnectAuthorizeURL,
+		OIDCConnectTokenURL:                  updatedSettings.OIDCConnectTokenURL,
+		OIDCConnectUserInfoURL:               updatedSettings.OIDCConnectUserInfoURL,
+		OIDCConnectJWKSURL:                   updatedSettings.OIDCConnectJWKSURL,
+		OIDCConnectScopes:                    updatedSettings.OIDCConnectScopes,
+		OIDCConnectRedirectURL:               updatedSettings.OIDCConnectRedirectURL,
+		OIDCConnectFrontendRedirectURL:       updatedSettings.OIDCConnectFrontendRedirectURL,
+		OIDCConnectTokenAuthMethod:           updatedSettings.OIDCConnectTokenAuthMethod,
+		OIDCConnectUsePKCE:                   updatedSettings.OIDCConnectUsePKCE,
+		OIDCConnectValidateIDToken:           updatedSettings.OIDCConnectValidateIDToken,
+		OIDCConnectAllowedSigningAlgs:        updatedSettings.OIDCConnectAllowedSigningAlgs,
+		OIDCConnectClockSkewSeconds:          updatedSettings.OIDCConnectClockSkewSeconds,
+		OIDCConnectRequireEmailVerified:      updatedSettings.OIDCConnectRequireEmailVerified,
+		OIDCConnectUserInfoEmailPath:         updatedSettings.OIDCConnectUserInfoEmailPath,
+		OIDCConnectUserInfoIDPath:            updatedSettings.OIDCConnectUserInfoIDPath,
+		OIDCConnectUserInfoUsernamePath:      updatedSettings.OIDCConnectUserInfoUsernamePath,
 		SiteName:                             updatedSettings.SiteName,
 		SiteLogo:                             updatedSettings.SiteLogo,
 		SiteSubtitle:                         updatedSettings.SiteSubtitle,
@@ -802,6 +1017,72 @@ func diffSettings(before *service.SystemSettings, after *service.SystemSettings,
 	if before.LinuxDoConnectRedirectURL != after.LinuxDoConnectRedirectURL {
 		changed = append(changed, "linuxdo_connect_redirect_url")
 	}
+	if before.OIDCConnectEnabled != after.OIDCConnectEnabled {
+		changed = append(changed, "oidc_connect_enabled")
+	}
+	if before.OIDCConnectProviderName != after.OIDCConnectProviderName {
+		changed = append(changed, "oidc_connect_provider_name")
+	}
+	if before.OIDCConnectClientID != after.OIDCConnectClientID {
+		changed = append(changed, "oidc_connect_client_id")
+	}
+	if req.OIDCConnectClientSecret != "" {
+		changed = append(changed, "oidc_connect_client_secret")
+	}
+	if before.OIDCConnectIssuerURL != after.OIDCConnectIssuerURL {
+		changed = append(changed, "oidc_connect_issuer_url")
+	}
+	if before.OIDCConnectDiscoveryURL != after.OIDCConnectDiscoveryURL {
+		changed = append(changed, "oidc_connect_discovery_url")
+	}
+	if before.OIDCConnectAuthorizeURL != after.OIDCConnectAuthorizeURL {
+		changed = append(changed, "oidc_connect_authorize_url")
+	}
+	if before.OIDCConnectTokenURL != after.OIDCConnectTokenURL {
+		changed = append(changed, "oidc_connect_token_url")
+	}
+	if before.OIDCConnectUserInfoURL != after.OIDCConnectUserInfoURL {
+		changed = append(changed, "oidc_connect_userinfo_url")
+	}
+	if before.OIDCConnectJWKSURL != after.OIDCConnectJWKSURL {
+		changed = append(changed, "oidc_connect_jwks_url")
+	}
+	if before.OIDCConnectScopes != after.OIDCConnectScopes {
+		changed = append(changed, "oidc_connect_scopes")
+	}
+	if before.OIDCConnectRedirectURL != after.OIDCConnectRedirectURL {
+		changed = append(changed, "oidc_connect_redirect_url")
+	}
+	if before.OIDCConnectFrontendRedirectURL != after.OIDCConnectFrontendRedirectURL {
+		changed = append(changed, "oidc_connect_frontend_redirect_url")
+	}
+	if before.OIDCConnectTokenAuthMethod != after.OIDCConnectTokenAuthMethod {
+		changed = append(changed, "oidc_connect_token_auth_method")
+	}
+	if before.OIDCConnectUsePKCE != after.OIDCConnectUsePKCE {
+		changed = append(changed, "oidc_connect_use_pkce")
+	}
+	if before.OIDCConnectValidateIDToken != after.OIDCConnectValidateIDToken {
+		changed = append(changed, "oidc_connect_validate_id_token")
+	}
+	if before.OIDCConnectAllowedSigningAlgs != after.OIDCConnectAllowedSigningAlgs {
+		changed = append(changed, "oidc_connect_allowed_signing_algs")
+	}
+	if before.OIDCConnectClockSkewSeconds != after.OIDCConnectClockSkewSeconds {
+		changed = append(changed, "oidc_connect_clock_skew_seconds")
+	}
+	if before.OIDCConnectRequireEmailVerified != after.OIDCConnectRequireEmailVerified {
+		changed = append(changed, "oidc_connect_require_email_verified")
+	}
+	if before.OIDCConnectUserInfoEmailPath != after.OIDCConnectUserInfoEmailPath {
+		changed = append(changed, "oidc_connect_userinfo_email_path")
+	}
+	if before.OIDCConnectUserInfoIDPath != after.OIDCConnectUserInfoIDPath {
+		changed = append(changed, "oidc_connect_userinfo_id_path")
+	}
+	if before.OIDCConnectUserInfoUsernamePath != after.OIDCConnectUserInfoUsernamePath {
+		changed = append(changed, "oidc_connect_userinfo_username_path")
+	}
 	if before.SiteName != after.SiteName {
 		changed = append(changed, "site_name")
 	}

backend/internal/handler/auth_oidc_oauth.go

+package handler
+
+import (
+	"context"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rsa"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"log"
+	"math/big"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/oauth"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/service"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+	"github.com/imroc/req/v3"
+	"github.com/tidwall/gjson"
+)
+
+const (
+	oidcOAuthCookiePath        = "/api/v1/auth/oauth/oidc"
+	oidcOAuthStateCookieName   = "oidc_oauth_state"
+	oidcOAuthVerifierCookie    = "oidc_oauth_verifier"
+	oidcOAuthRedirectCookie    = "oidc_oauth_redirect"
+	oidcOAuthNonceCookie       = "oidc_oauth_nonce"
+	oidcOAuthCookieMaxAgeSec   = 10 * 60 // 10 minutes
+	oidcOAuthDefaultRedirectTo = "/dashboard"
+	oidcOAuthDefaultFrontendCB = "/auth/oidc/callback"
+)
+
+type oidcTokenResponse struct {
+	AccessToken  string `json:"access_token"`
+	TokenType    string `json:"token_type"`
+	ExpiresIn    int64  `json:"expires_in"`
+	RefreshToken string `json:"refresh_token,omitempty"`
+	Scope        string `json:"scope,omitempty"`
+	IDToken      string `json:"id_token,omitempty"`
+}
+
+type oidcTokenExchangeError struct {
+	StatusCode          int
+	ProviderError       string
+	ProviderDescription string
+	Body                string
+}
+
+func (e *oidcTokenExchangeError) Error() string {
+	if e == nil {
+		return ""
+	}
+	parts := []string{fmt.Sprintf("token exchange status=%d", e.StatusCode)}
+	if strings.TrimSpace(e.ProviderError) != "" {
+		parts = append(parts, "error="+strings.TrimSpace(e.ProviderError))
+	}
+	if strings.TrimSpace(e.ProviderDescription) != "" {
+		parts = append(parts, "error_description="+strings.TrimSpace(e.ProviderDescription))
+	}
+	return strings.Join(parts, " ")
+}
+
+type oidcIDTokenClaims struct {
+	Email             string `json:"email,omitempty"`
+	EmailVerified     *bool  `json:"email_verified,omitempty"`
+	PreferredUsername string `json:"preferred_username,omitempty"`
+	Name              string `json:"name,omitempty"`
+	Nonce             string `json:"nonce,omitempty"`
+	Azp               string `json:"azp,omitempty"`
+	jwt.RegisteredClaims
+}
+
+type oidcUserInfoClaims struct {
+	Email         string
+	Username      string
+	Subject       string
+	EmailVerified *bool
+}
+
+type oidcJWKSet struct {
+	Keys []oidcJWK `json:"keys"`
+}
+
+type oidcJWK struct {
+	Kty string `json:"kty"`
+	Kid string `json:"kid"`
+	Use string `json:"use"`
+	Alg string `json:"alg"`
+
+	N string `json:"n"`
+	E string `json:"e"`
+
+	Crv string `json:"crv"`
+	X   string `json:"x"`
+	Y   string `json:"y"`
+}
+
+// OIDCOAuthStart 启动通用 OIDC OAuth 登录流程。
+// GET /api/v1/auth/oauth/oidc/start?redirect=/dashboard
+func (h *AuthHandler) OIDCOAuthStart(c *gin.Context) {
+	cfg, err := h.getOIDCOAuthConfig(c.Request.Context())
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	state, err := oauth.GenerateState()
+	if err != nil {
+		response.ErrorFrom(c, infraerrors.InternalServer("OAUTH_STATE_GEN_FAILED", "failed to generate oauth state").WithCause(err))
+		return
+	}
+
+	redirectTo := sanitizeFrontendRedirectPath(c.Query("redirect"))
+	if redirectTo == "" {
+		redirectTo = oidcOAuthDefaultRedirectTo
+	}
+
+	secureCookie := isRequestHTTPS(c)
+	oidcSetCookie(c, oidcOAuthStateCookieName, encodeCookieValue(state), oidcOAuthCookieMaxAgeSec, secureCookie)
+	oidcSetCookie(c, oidcOAuthRedirectCookie, encodeCookieValue(redirectTo), oidcOAuthCookieMaxAgeSec, secureCookie)
+
+	codeChallenge := ""
+	if cfg.UsePKCE {
+		verifier, genErr := oauth.GenerateCodeVerifier()
+		if genErr != nil {
+			response.ErrorFrom(c, infraerrors.InternalServer("OAUTH_PKCE_GEN_FAILED", "failed to generate pkce verifier").WithCause(genErr))
+			return
+		}
+		codeChallenge = oauth.GenerateCodeChallenge(verifier)
+		oidcSetCookie(c, oidcOAuthVerifierCookie, encodeCookieValue(verifier), oidcOAuthCookieMaxAgeSec, secureCookie)
+	}
+
+	nonce := ""
+	if cfg.ValidateIDToken {
+		nonce, err = oauth.GenerateState()
+		if err != nil {
+			response.ErrorFrom(c, infraerrors.InternalServer("OAUTH_NONCE_GEN_FAILED", "failed to generate oauth nonce").WithCause(err))
+			return
+		}
+		oidcSetCookie(c, oidcOAuthNonceCookie, encodeCookieValue(nonce), oidcOAuthCookieMaxAgeSec, secureCookie)
+	}
+
+	redirectURI := strings.TrimSpace(cfg.RedirectURL)
+	if redirectURI == "" {
+		response.ErrorFrom(c, infraerrors.InternalServer("OAUTH_CONFIG_INVALID", "oauth redirect url not configured"))
+		return
+	}
+
+	authURL, err := buildOIDCAuthorizeURL(cfg, state, nonce, codeChallenge, redirectURI)
+	if err != nil {
+		response.ErrorFrom(c, infraerrors.InternalServer("OAUTH_BUILD_URL_FAILED", "failed to build oauth authorization url").WithCause(err))
+		return
+	}
+
+	c.Redirect(http.StatusFound, authURL)
+}
+
+// OIDCOAuthCallback 处理 OIDC 回调：校验 id_token、创建/登录用户并重定向到前端。
+// GET /api/v1/auth/oauth/oidc/callback?code=...&state=...
+func (h *AuthHandler) OIDCOAuthCallback(c *gin.Context) {
+	cfg, cfgErr := h.getOIDCOAuthConfig(c.Request.Context())
+	if cfgErr != nil {
+		response.ErrorFrom(c, cfgErr)
+		return
+	}
+
+	frontendCallback := strings.TrimSpace(cfg.FrontendRedirectURL)
+	if frontendCallback == "" {
+		frontendCallback = oidcOAuthDefaultFrontendCB
+	}
+
+	if providerErr := strings.TrimSpace(c.Query("error")); providerErr != "" {
+		redirectOAuthError(c, frontendCallback, "provider_error", providerErr, c.Query("error_description"))
+		return
+	}
+
+	code := strings.TrimSpace(c.Query("code"))
+	state := strings.TrimSpace(c.Query("state"))
+	if code == "" || state == "" {
+		redirectOAuthError(c, frontendCallback, "missing_params", "missing code/state", "")
+		return
+	}
+
+	secureCookie := isRequestHTTPS(c)
+	defer func() {
+		oidcClearCookie(c, oidcOAuthStateCookieName, secureCookie)
+		oidcClearCookie(c, oidcOAuthVerifierCookie, secureCookie)
+		oidcClearCookie(c, oidcOAuthRedirectCookie, secureCookie)
+		oidcClearCookie(c, oidcOAuthNonceCookie, secureCookie)
+	}()
+
+	expectedState, err := readCookieDecoded(c, oidcOAuthStateCookieName)
+	if err != nil || expectedState == "" || state != expectedState {
+		redirectOAuthError(c, frontendCallback, "invalid_state", "invalid oauth state", "")
+		return
+	}
+
+	redirectTo, _ := readCookieDecoded(c, oidcOAuthRedirectCookie)
+	redirectTo = sanitizeFrontendRedirectPath(redirectTo)
+	if redirectTo == "" {
+		redirectTo = oidcOAuthDefaultRedirectTo
+	}
+
+	codeVerifier := ""
+	if cfg.UsePKCE {
+		codeVerifier, _ = readCookieDecoded(c, oidcOAuthVerifierCookie)
+		if codeVerifier == "" {
+			redirectOAuthError(c, frontendCallback, "missing_verifier", "missing pkce verifier", "")
+			return
+		}
+	}
+
+	expectedNonce := ""
+	if cfg.ValidateIDToken {
+		expectedNonce, _ = readCookieDecoded(c, oidcOAuthNonceCookie)
+		if expectedNonce == "" {
+			redirectOAuthError(c, frontendCallback, "missing_nonce", "missing oauth nonce", "")
+			return
+		}
+	}
+
+	redirectURI := strings.TrimSpace(cfg.RedirectURL)
+	if redirectURI == "" {
+		redirectOAuthError(c, frontendCallback, "config_error", "oauth redirect url not configured", "")
+		return
+	}
+
+	tokenResp, err := oidcExchangeCode(c.Request.Context(), cfg, code, redirectURI, codeVerifier)
+	if err != nil {
+		description := ""
+		var exchangeErr *oidcTokenExchangeError
+		if errors.As(err, &exchangeErr) && exchangeErr != nil {
+			log.Printf(
+				"[OIDC OAuth] token exchange failed: status=%d provider_error=%q provider_description=%q body=%s",
+				exchangeErr.StatusCode,
+				exchangeErr.ProviderError,
+				exchangeErr.ProviderDescription,
+				truncateLogValue(exchangeErr.Body, 2048),
+			)
+			description = exchangeErr.Error()
+		} else {
+			log.Printf("[OIDC OAuth] token exchange failed: %v", err)
+			description = err.Error()
+		}
+		redirectOAuthError(c, frontendCallback, "token_exchange_failed", "failed to exchange oauth code", singleLine(description))
+		return
+	}
+
+	if cfg.ValidateIDToken && strings.TrimSpace(tokenResp.IDToken) == "" {
+		redirectOAuthError(c, frontendCallback, "missing_id_token", "missing id_token", "")
+		return
+	}
+
+	idClaims, err := oidcParseAndValidateIDToken(c.Request.Context(), cfg, tokenResp.IDToken, expectedNonce)
+	if err != nil {
+		log.Printf("[OIDC OAuth] id_token validation failed: %v", err)
+		redirectOAuthError(c, frontendCallback, "invalid_id_token", "failed to validate id_token", "")
+		return
+	}
+
+	userInfoClaims, err := oidcFetchUserInfo(c.Request.Context(), cfg, tokenResp)
+	if err != nil {
+		log.Printf("[OIDC OAuth] userinfo fetch failed: %v", err)
+		redirectOAuthError(c, frontendCallback, "userinfo_failed", "failed to fetch user info", "")
+		return
+	}
+
+	subject := strings.TrimSpace(idClaims.Subject)
+	if subject == "" {
+		subject = strings.TrimSpace(userInfoClaims.Subject)
+	}
+	if subject == "" {
+		redirectOAuthError(c, frontendCallback, "missing_subject", "missing subject claim", "")
+		return
+	}
+	issuer := strings.TrimSpace(idClaims.Issuer)
+	if issuer == "" {
+		issuer = strings.TrimSpace(cfg.IssuerURL)
+	}
+	if issuer == "" {
+		redirectOAuthError(c, frontendCallback, "missing_issuer", "missing issuer claim", "")
+		return
+	}
+
+	emailVerified := userInfoClaims.EmailVerified
+	if emailVerified == nil {
+		emailVerified = idClaims.EmailVerified
+	}
+	if cfg.RequireEmailVerified {
+		if emailVerified == nil || !*emailVerified {
+			redirectOAuthError(c, frontendCallback, "email_not_verified", "email is not verified", "")
+			return
+		}
+	}
+
+	identityKey := oidcIdentityKey(issuer, subject)
+	email := oidcSelectLoginEmail(userInfoClaims.Email, idClaims.Email, identityKey)
+	username := firstNonEmpty(
+		userInfoClaims.Username,
+		idClaims.PreferredUsername,
+		idClaims.Name,
+		oidcFallbackUsername(subject),
+	)
+
+	// 传入空邀请码；如果需要邀请码，服务层返回 ErrOAuthInvitationRequired
+	tokenPair, _, err := h.authService.LoginOrRegisterOAuthWithTokenPair(c.Request.Context(), email, username, "")
+	if err != nil {
+		if errors.Is(err, service.ErrOAuthInvitationRequired) {
+			pendingToken, tokenErr := h.authService.CreatePendingOAuthToken(email, username)
+			if tokenErr != nil {
+				redirectOAuthError(c, frontendCallback, "login_failed", "service_error", "")
+				return
+			}
+			fragment := url.Values{}
+			fragment.Set("error", "invitation_required")
+			fragment.Set("pending_oauth_token", pendingToken)
+			fragment.Set("redirect", redirectTo)
+			redirectWithFragment(c, frontendCallback, fragment)
+			return
+		}
+		redirectOAuthError(c, frontendCallback, "login_failed", infraerrors.Reason(err), infraerrors.Message(err))
+		return
+	}
+
+	fragment := url.Values{}
+	fragment.Set("access_token", tokenPair.AccessToken)
+	fragment.Set("refresh_token", tokenPair.RefreshToken)
+	fragment.Set("expires_in", fmt.Sprintf("%d", tokenPair.ExpiresIn))
+	fragment.Set("token_type", "Bearer")
+	fragment.Set("redirect", redirectTo)
+	redirectWithFragment(c, frontendCallback, fragment)
+}
+
+type completeOIDCOAuthRequest struct {
+	PendingOAuthToken string `json:"pending_oauth_token" binding:"required"`
+	InvitationCode    string `json:"invitation_code"     binding:"required"`
+}
+
+// CompleteOIDCOAuthRegistration completes a pending OAuth registration by validating
+// the invitation code and creating the user account.
+// POST /api/v1/auth/oauth/oidc/complete-registration
+func (h *AuthHandler) CompleteOIDCOAuthRegistration(c *gin.Context) {
+	var req completeOIDCOAuthRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "INVALID_REQUEST", "message": err.Error()})
+		return
+	}
+
+	email, username, err := h.authService.VerifyPendingOAuthToken(req.PendingOAuthToken)
+	if err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "INVALID_TOKEN", "message": "invalid or expired registration token"})
+		return
+	}
+
+	tokenPair, _, err := h.authService.LoginOrRegisterOAuthWithTokenPair(c.Request.Context(), email, username, req.InvitationCode)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"access_token":  tokenPair.AccessToken,
+		"refresh_token": tokenPair.RefreshToken,
+		"expires_in":    tokenPair.ExpiresIn,
+		"token_type":    "Bearer",
+	})
+}
+
+func (h *AuthHandler) getOIDCOAuthConfig(ctx context.Context) (config.OIDCConnectConfig, error) {
+	if h != nil && h.settingSvc != nil {
+		return h.settingSvc.GetOIDCConnectOAuthConfig(ctx)
+	}
+	if h == nil || h.cfg == nil {
+		return config.OIDCConnectConfig{}, infraerrors.ServiceUnavailable("CONFIG_NOT_READY", "config not loaded")
+	}
+	if !h.cfg.OIDC.Enabled {
+		return config.OIDCConnectConfig{}, infraerrors.NotFound("OAUTH_DISABLED", "oauth login is disabled")
+	}
+	return h.cfg.OIDC, nil
+}
+
+func oidcExchangeCode(
+	ctx context.Context,
+	cfg config.OIDCConnectConfig,
+	code string,
+	redirectURI string,
+	codeVerifier string,
+) (*oidcTokenResponse, error) {
+	client := req.C().SetTimeout(30 * time.Second)
+
+	form := url.Values{}
+	form.Set("grant_type", "authorization_code")
+	form.Set("client_id", cfg.ClientID)
+	form.Set("code", code)
+	form.Set("redirect_uri", redirectURI)
+	if cfg.UsePKCE {
+		form.Set("code_verifier", codeVerifier)
+	}
+
+	r := client.R().
+		SetContext(ctx).
+		SetHeader("Accept", "application/json")
+
+	switch strings.ToLower(strings.TrimSpace(cfg.TokenAuthMethod)) {
+	case "", "client_secret_post":
+		form.Set("client_secret", cfg.ClientSecret)
+	case "client_secret_basic":
+		r.SetBasicAuth(cfg.ClientID, cfg.ClientSecret)
+	case "none":
+	default:
+		return nil, fmt.Errorf("unsupported token_auth_method: %s", cfg.TokenAuthMethod)
+	}
+
+	resp, err := r.SetFormDataFromValues(form).Post(cfg.TokenURL)
+	if err != nil {
+		return nil, fmt.Errorf("request token: %w", err)
+	}
+	body := strings.TrimSpace(resp.String())
+	if !resp.IsSuccessState() {
+		providerErr, providerDesc := parseOAuthProviderError(body)
+		return nil, &oidcTokenExchangeError{
+			StatusCode:          resp.StatusCode,
+			ProviderError:       providerErr,
+			ProviderDescription: providerDesc,
+			Body:                body,
+		}
+	}
+
+	tokenResp, ok := oidcParseTokenResponse(body)
+	if !ok {
+		return nil, &oidcTokenExchangeError{StatusCode: resp.StatusCode, Body: body}
+	}
+	if strings.TrimSpace(tokenResp.TokenType) == "" {
+		tokenResp.TokenType = "Bearer"
+	}
+	if strings.TrimSpace(tokenResp.AccessToken) == "" && strings.TrimSpace(tokenResp.IDToken) == "" {
+		return nil, &oidcTokenExchangeError{StatusCode: resp.StatusCode, Body: body}
+	}
+	return tokenResp, nil
+}
+
+func oidcParseTokenResponse(body string) (*oidcTokenResponse, bool) {
+	body = strings.TrimSpace(body)
+	if body == "" {
+		return nil, false
+	}
+
+	accessToken := strings.TrimSpace(getGJSON(body, "access_token"))
+	idToken := strings.TrimSpace(getGJSON(body, "id_token"))
+	if accessToken != "" || idToken != "" {
+		tokenType := strings.TrimSpace(getGJSON(body, "token_type"))
+		refreshToken := strings.TrimSpace(getGJSON(body, "refresh_token"))
+		scope := strings.TrimSpace(getGJSON(body, "scope"))
+		expiresIn := gjson.Get(body, "expires_in").Int()
+		return &oidcTokenResponse{
+			AccessToken:  accessToken,
+			TokenType:    tokenType,
+			ExpiresIn:    expiresIn,
+			RefreshToken: refreshToken,
+			Scope:        scope,
+			IDToken:      idToken,
+		}, true
+	}
+
+	values, err := url.ParseQuery(body)
+	if err != nil {
+		return nil, false
+	}
+	accessToken = strings.TrimSpace(values.Get("access_token"))
+	idToken = strings.TrimSpace(values.Get("id_token"))
+	if accessToken == "" && idToken == "" {
+		return nil, false
+	}
+	expiresIn := int64(0)
+	if raw := strings.TrimSpace(values.Get("expires_in")); raw != "" {
+		if v, parseErr := strconv.ParseInt(raw, 10, 64); parseErr == nil {
+			expiresIn = v
+		}
+	}
+	return &oidcTokenResponse{
+		AccessToken:  accessToken,
+		TokenType:    strings.TrimSpace(values.Get("token_type")),
+		ExpiresIn:    expiresIn,
+		RefreshToken: strings.TrimSpace(values.Get("refresh_token")),
+		Scope:        strings.TrimSpace(values.Get("scope")),
+		IDToken:      idToken,
+	}, true
+}
+
+func oidcFetchUserInfo(
+	ctx context.Context,
+	cfg config.OIDCConnectConfig,
+	token *oidcTokenResponse,
+) (*oidcUserInfoClaims, error) {
+	if strings.TrimSpace(cfg.UserInfoURL) == "" {
+		return &oidcUserInfoClaims{}, nil
+	}
+	if token == nil || strings.TrimSpace(token.AccessToken) == "" {
+		return nil, errors.New("missing access_token for userinfo request")
+	}
+
+	client := req.C().SetTimeout(30 * time.Second)
+	authorization, err := buildBearerAuthorization(token.TokenType, token.AccessToken)
+	if err != nil {
+		return nil, fmt.Errorf("invalid token for userinfo request: %w", err)
+	}
+
+	resp, err := client.R().
+		SetContext(ctx).
+		SetHeader("Accept", "application/json").
+		SetHeader("Authorization", authorization).
+		Get(cfg.UserInfoURL)
+	if err != nil {
+		return nil, fmt.Errorf("request userinfo: %w", err)
+	}
+	if !resp.IsSuccessState() {
+		return nil, fmt.Errorf("userinfo status=%d", resp.StatusCode)
+	}
+
+	return oidcParseUserInfo(resp.String(), cfg), nil
+}
+
+func oidcParseUserInfo(body string, cfg config.OIDCConnectConfig) *oidcUserInfoClaims {
+	claims := &oidcUserInfoClaims{}
+	claims.Email = firstNonEmpty(
+		getGJSON(body, cfg.UserInfoEmailPath),
+		getGJSON(body, "email"),
+		getGJSON(body, "user.email"),
+		getGJSON(body, "data.email"),
+		getGJSON(body, "attributes.email"),
+	)
+	claims.Username = firstNonEmpty(
+		getGJSON(body, cfg.UserInfoUsernamePath),
+		getGJSON(body, "preferred_username"),
+		getGJSON(body, "username"),
+		getGJSON(body, "name"),
+		getGJSON(body, "user.username"),
+		getGJSON(body, "user.name"),
+	)
+	claims.Subject = firstNonEmpty(
+		getGJSON(body, cfg.UserInfoIDPath),
+		getGJSON(body, "sub"),
+		getGJSON(body, "id"),
+		getGJSON(body, "user_id"),
+		getGJSON(body, "uid"),
+		getGJSON(body, "user.id"),
+	)
+	if verified, ok := getGJSONBool(body, "email_verified"); ok {
+		claims.EmailVerified = &verified
+	}
+	claims.Email = strings.TrimSpace(claims.Email)
+	claims.Username = strings.TrimSpace(claims.Username)
+	claims.Subject = strings.TrimSpace(claims.Subject)
+	return claims
+}
+
+func getGJSONBool(body string, path string) (bool, bool) {
+	path = strings.TrimSpace(path)
+	if path == "" {
+		return false, false
+	}
+	res := gjson.Get(body, path)
+	if !res.Exists() {
+		return false, false
+	}
+	return res.Bool(), true
+}
+
+func buildOIDCAuthorizeURL(cfg config.OIDCConnectConfig, state, nonce, codeChallenge, redirectURI string) (string, error) {
+	u, err := url.Parse(cfg.AuthorizeURL)
+	if err != nil {
+		return "", fmt.Errorf("parse authorize_url: %w", err)
+	}
+
+	q := u.Query()
+	q.Set("response_type", "code")
+	q.Set("client_id", cfg.ClientID)
+	q.Set("redirect_uri", redirectURI)
+	if strings.TrimSpace(cfg.Scopes) != "" {
+		q.Set("scope", cfg.Scopes)
+	}
+	q.Set("state", state)
+	if strings.TrimSpace(nonce) != "" {
+		q.Set("nonce", nonce)
+	}
+	if cfg.UsePKCE {
+		q.Set("code_challenge", codeChallenge)
+		q.Set("code_challenge_method", "S256")
+	}
+
+	u.RawQuery = q.Encode()
+	return u.String(), nil
+}
+
+func oidcParseAndValidateIDToken(ctx context.Context, cfg config.OIDCConnectConfig, idToken string, expectedNonce string) (*oidcIDTokenClaims, error) {
+	idToken = strings.TrimSpace(idToken)
+	if idToken == "" {
+		return nil, errors.New("missing id_token")
+	}
+	allowed := oidcAllowedSigningAlgs(cfg.AllowedSigningAlgs)
+	if len(allowed) == 0 {
+		return nil, errors.New("empty allowed signing algorithms")
+	}
+
+	jwks, err := oidcFetchJWKSet(ctx, cfg.JWKSURL)
+	if err != nil {
+		return nil, err
+	}
+	leeway := time.Duration(cfg.ClockSkewSeconds) * time.Second
+	claims := &oidcIDTokenClaims{}
+
+	parsed, err := jwt.ParseWithClaims(
+		idToken,
+		claims,
+		func(token *jwt.Token) (any, error) {
+			alg := strings.TrimSpace(token.Method.Alg())
+			if !containsString(allowed, alg) {
+				return nil, fmt.Errorf("unexpected signing algorithm: %s", alg)
+			}
+			kid, _ := token.Header["kid"].(string)
+			return oidcFindPublicKey(jwks, strings.TrimSpace(kid), alg)
+		},
+		jwt.WithValidMethods(allowed),
+		jwt.WithAudience(cfg.ClientID),
+		jwt.WithIssuer(cfg.IssuerURL),
+		jwt.WithLeeway(leeway),
+	)
+	if err != nil {
+		return nil, err
+	}
+	if !parsed.Valid {
+		return nil, errors.New("id_token invalid")
+	}
+	if strings.TrimSpace(claims.Subject) == "" {
+		return nil, errors.New("id_token missing sub")
+	}
+	if expectedNonce != "" && strings.TrimSpace(claims.Nonce) != strings.TrimSpace(expectedNonce) {
+		return nil, errors.New("id_token nonce mismatch")
+	}
+	if len(claims.Audience) > 1 {
+		if strings.TrimSpace(claims.Azp) == "" || strings.TrimSpace(claims.Azp) != strings.TrimSpace(cfg.ClientID) {
+			return nil, errors.New("id_token azp mismatch")
+		}
+	}
+	return claims, nil
+}
+
+func oidcAllowedSigningAlgs(raw string) []string {
+	if strings.TrimSpace(raw) == "" {
+		return []string{"RS256", "ES256", "PS256"}
+	}
+	seen := make(map[string]struct{})
+	out := make([]string, 0, 4)
+	for _, part := range strings.Split(raw, ",") {
+		alg := strings.ToUpper(strings.TrimSpace(part))
+		if alg == "" {
+			continue
+		}
+		if _, ok := seen[alg]; ok {
+			continue
+		}
+		seen[alg] = struct{}{}
+		out = append(out, alg)
+	}
+	return out
+}
+
+func oidcFetchJWKSet(ctx context.Context, jwksURL string) (*oidcJWKSet, error) {
+	jwksURL = strings.TrimSpace(jwksURL)
+	if jwksURL == "" {
+		return nil, errors.New("missing jwks_url")
+	}
+	resp, err := req.C().
+		SetTimeout(30*time.Second).
+		R().
+		SetContext(ctx).
+		SetHeader("Accept", "application/json").
+		Get(jwksURL)
+	if err != nil {
+		return nil, fmt.Errorf("request jwks: %w", err)
+	}
+	if !resp.IsSuccessState() {
+		return nil, fmt.Errorf("jwks status=%d", resp.StatusCode)
+	}
+	set := &oidcJWKSet{}
+	if err := json.Unmarshal(resp.Bytes(), set); err != nil {
+		return nil, fmt.Errorf("parse jwks: %w", err)
+	}
+	if len(set.Keys) == 0 {
+		return nil, errors.New("jwks empty keys")
+	}
+	return set, nil
+}
+
+func oidcFindPublicKey(set *oidcJWKSet, kid, alg string) (any, error) {
+	if set == nil {
+		return nil, errors.New("jwks not loaded")
+	}
+	alg = strings.ToUpper(strings.TrimSpace(alg))
+	kid = strings.TrimSpace(kid)
+
+	var lastErr error
+	for i := range set.Keys {
+		k := set.Keys[i]
+		if strings.TrimSpace(k.Use) != "" && !strings.EqualFold(strings.TrimSpace(k.Use), "sig") {
+			continue
+		}
+		if kid != "" && strings.TrimSpace(k.Kid) != kid {
+			continue
+		}
+		if strings.TrimSpace(k.Alg) != "" && !strings.EqualFold(strings.TrimSpace(k.Alg), alg) {
+			continue
+		}
+		pk, err := k.publicKey()
+		if err != nil {
+			lastErr = err
+			continue
+		}
+		if pk != nil {
+			return pk, nil
+		}
+	}
+	if lastErr != nil {
+		return nil, lastErr
+	}
+	if kid != "" {
+		return nil, fmt.Errorf("jwk not found for kid=%s", kid)
+	}
+	return nil, errors.New("jwk not found")
+}
+
+func (k oidcJWK) publicKey() (any, error) {
+	switch strings.ToUpper(strings.TrimSpace(k.Kty)) {
+	case "RSA":
+		n, err := decodeBase64URLBigInt(k.N)
+		if err != nil {
+			return nil, fmt.Errorf("decode rsa n: %w", err)
+		}
+		eBytes, err := base64.RawURLEncoding.DecodeString(strings.TrimSpace(k.E))
+		if err != nil {
+			return nil, fmt.Errorf("decode rsa e: %w", err)
+		}
+		if len(eBytes) == 0 {
+			return nil, errors.New("empty rsa e")
+		}
+		e := 0
+		for _, b := range eBytes {
+			e = (e << 8) | int(b)
+		}
+		if e <= 0 {
+			return nil, errors.New("invalid rsa exponent")
+		}
+		if n.Sign() <= 0 {
+			return nil, errors.New("invalid rsa modulus")
+		}
+		return &rsa.PublicKey{N: n, E: e}, nil
+	case "EC":
+		var curve elliptic.Curve
+		switch strings.TrimSpace(k.Crv) {
+		case "P-256":
+			curve = elliptic.P256()
+		case "P-384":
+			curve = elliptic.P384()
+		case "P-521":
+			curve = elliptic.P521()
+		default:
+			return nil, fmt.Errorf("unsupported ec curve: %s", k.Crv)
+		}
+		x, err := decodeBase64URLBigInt(k.X)
+		if err != nil {
+			return nil, fmt.Errorf("decode ec x: %w", err)
+		}
+		y, err := decodeBase64URLBigInt(k.Y)
+		if err != nil {
+			return nil, fmt.Errorf("decode ec y: %w", err)
+		}
+		if !curve.IsOnCurve(x, y) {
+			return nil, errors.New("ec point is not on curve")
+		}
+		return &ecdsa.PublicKey{Curve: curve, X: x, Y: y}, nil
+	default:
+		return nil, fmt.Errorf("unsupported jwk kty: %s", k.Kty)
+	}
+}
+
+func decodeBase64URLBigInt(raw string) (*big.Int, error) {
+	buf, err := base64.RawURLEncoding.DecodeString(strings.TrimSpace(raw))
+	if err != nil {
+		return nil, err
+	}
+	if len(buf) == 0 {
+		return nil, errors.New("empty value")
+	}
+	return new(big.Int).SetBytes(buf), nil
+}
+
+func containsString(values []string, target string) bool {
+	target = strings.TrimSpace(target)
+	for _, v := range values {
+		if strings.EqualFold(strings.TrimSpace(v), target) {
+			return true
+		}
+	}
+	return false
+}
+
+func oidcIdentityKey(issuer, subject string) string {
+	issuer = strings.TrimSpace(strings.ToLower(issuer))
+	subject = strings.TrimSpace(subject)
+	return issuer + "\x1f" + subject
+}
+
+func oidcSyntheticEmailFromIdentityKey(identityKey string) string {
+	identityKey = strings.TrimSpace(identityKey)
+	if identityKey == "" {
+		return ""
+	}
+	sum := sha256.Sum256([]byte(identityKey))
+	return "oidc-" + hex.EncodeToString(sum[:16]) + service.OIDCConnectSyntheticEmailDomain
+}
+
+func oidcSelectLoginEmail(userInfoEmail, idTokenEmail, identityKey string) string {
+	email := strings.TrimSpace(firstNonEmpty(userInfoEmail, idTokenEmail))
+	if email != "" {
+		return email
+	}
+	return oidcSyntheticEmailFromIdentityKey(identityKey)
+}
+
+func oidcFallbackUsername(subject string) string {
+	subject = strings.TrimSpace(subject)
+	if subject == "" {
+		return "oidc_user"
+	}
+	sum := sha256.Sum256([]byte(subject))
+	return "oidc_" + hex.EncodeToString(sum[:])[:12]
+}
+
+func oidcSetCookie(c *gin.Context, name, value string, maxAgeSec int, secure bool) {
+	http.SetCookie(c.Writer, &http.Cookie{
+		Name:     name,
+		Value:    value,
+		Path:     oidcOAuthCookiePath,
+		MaxAge:   maxAgeSec,
+		HttpOnly: true,
+		Secure:   secure,
+		SameSite: http.SameSiteLaxMode,
+	})
+}
+
+func oidcClearCookie(c *gin.Context, name string, secure bool) {
+	http.SetCookie(c.Writer, &http.Cookie{
+		Name:     name,
+		Value:    "",
+		Path:     oidcOAuthCookiePath,
+		MaxAge:   -1,
+		HttpOnly: true,
+		Secure:   secure,
+		SameSite: http.SameSiteLaxMode,
+	})
+}

backend/internal/handler/auth_oidc_oauth_test.go

+package handler
+
+import (
+	"context"
+	"crypto/rand"
+	"crypto/rsa"
+	"encoding/base64"
+	"encoding/json"
+	"math/big"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/golang-jwt/jwt/v5"
+	"github.com/stretchr/testify/require"
+)
+
+func TestOIDCSyntheticEmailStableAndDistinct(t *testing.T) {
+	k1 := oidcIdentityKey("https://issuer.example.com", "subject-a")
+	k2 := oidcIdentityKey("https://issuer.example.com", "subject-b")
+
+	e1 := oidcSyntheticEmailFromIdentityKey(k1)
+	e1Again := oidcSyntheticEmailFromIdentityKey(k1)
+	e2 := oidcSyntheticEmailFromIdentityKey(k2)
+
+	require.Equal(t, e1, e1Again)
+	require.NotEqual(t, e1, e2)
+	require.Contains(t, e1, "@oidc-connect.invalid")
+}
+
+func TestOIDCSelectLoginEmailPrefersRealEmail(t *testing.T) {
+	identityKey := oidcIdentityKey("https://issuer.example.com", "subject-a")
+
+	email := oidcSelectLoginEmail("user@example.com", "idtoken@example.com", identityKey)
+	require.Equal(t, "user@example.com", email)
+
+	email = oidcSelectLoginEmail("", "idtoken@example.com", identityKey)
+	require.Equal(t, "idtoken@example.com", email)
+
+	email = oidcSelectLoginEmail("", "", identityKey)
+	require.Contains(t, email, "@oidc-connect.invalid")
+	require.Equal(t, oidcSyntheticEmailFromIdentityKey(identityKey), email)
+}
+
+func TestBuildOIDCAuthorizeURLIncludesNonceAndPKCE(t *testing.T) {
+	cfg := config.OIDCConnectConfig{
+		AuthorizeURL: "https://issuer.example.com/auth",
+		ClientID:     "cid",
+		Scopes:       "openid email profile",
+		UsePKCE:      true,
+	}
+
+	u, err := buildOIDCAuthorizeURL(cfg, "state123", "nonce123", "challenge123", "https://app.example.com/callback")
+	require.NoError(t, err)
+	require.Contains(t, u, "nonce=nonce123")
+	require.Contains(t, u, "code_challenge=challenge123")
+	require.Contains(t, u, "code_challenge_method=S256")
+	require.Contains(t, u, "scope=openid+email+profile")
+}
+
+func TestOIDCParseAndValidateIDToken(t *testing.T) {
+	priv, err := rsa.GenerateKey(rand.Reader, 2048)
+	require.NoError(t, err)
+
+	kid := "kid-1"
+	jwks := oidcJWKSet{Keys: []oidcJWK{buildRSAJWK(kid, &priv.PublicKey)}}
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		require.NoError(t, json.NewEncoder(w).Encode(jwks))
+	}))
+	defer srv.Close()
+
+	now := time.Now()
+	claims := oidcIDTokenClaims{
+		Nonce: "nonce-ok",
+		Azp:   "client-1",
+		RegisteredClaims: jwt.RegisteredClaims{
+			Issuer:    "https://issuer.example.com",
+			Subject:   "subject-1",
+			Audience:  jwt.ClaimStrings{"client-1", "another-aud"},
+			IssuedAt:  jwt.NewNumericDate(now),
+			NotBefore: jwt.NewNumericDate(now.Add(-30 * time.Second)),
+			ExpiresAt: jwt.NewNumericDate(now.Add(5 * time.Minute)),
+		},
+	}
+	tok := jwt.NewWithClaims(jwt.SigningMethodRS256, claims)
+	tok.Header["kid"] = kid
+	signed, err := tok.SignedString(priv)
+	require.NoError(t, err)
+
+	cfg := config.OIDCConnectConfig{
+		ClientID:           "client-1",
+		IssuerURL:          "https://issuer.example.com",
+		JWKSURL:            srv.URL,
+		AllowedSigningAlgs: "RS256",
+		ClockSkewSeconds:   120,
+	}
+
+	parsed, err := oidcParseAndValidateIDToken(context.Background(), cfg, signed, "nonce-ok")
+	require.NoError(t, err)
+	require.Equal(t, "subject-1", parsed.Subject)
+	require.Equal(t, "https://issuer.example.com", parsed.Issuer)
+
+	_, err = oidcParseAndValidateIDToken(context.Background(), cfg, signed, "bad-nonce")
+	require.Error(t, err)
+}
+
+func buildRSAJWK(kid string, pub *rsa.PublicKey) oidcJWK {
+	n := base64.RawURLEncoding.EncodeToString(pub.N.Bytes())
+	e := base64.RawURLEncoding.EncodeToString(big.NewInt(int64(pub.E)).Bytes())
+	return oidcJWK{
+		Kty: "RSA",
+		Kid: kid,
+		Use: "sig",
+		Alg: "RS256",
+		N:   n,
+		E:   e,
+	}
+}

backend/internal/handler/dto/mappers.go

@@ -138,6 +138,7 @@ func GroupFromServiceAdmin(g *service.Group) *AdminGroup {
 		ModelRoutingEnabled:         g.ModelRoutingEnabled,
 		MCPXMLInject:                g.MCPXMLInject,
 		DefaultMappedModel:          g.DefaultMappedModel,
+		MessagesDispatchModelConfig: g.MessagesDispatchModelConfig,
 		SupportedModelScopes:        g.SupportedModelScopes,
 		AccountCount:                g.AccountCount,
 		ActiveAccountCount:          g.ActiveAccountCount,

backend/internal/handler/dto/settings.go

@@ -51,6 +51,29 @@ type SystemSettings struct {
 	LinuxDoConnectClientSecretConfigured bool   `json:"linuxdo_connect_client_secret_configured"`
 	LinuxDoConnectRedirectURL            string `json:"linuxdo_connect_redirect_url"`
 
+	OIDCConnectEnabled                bool   `json:"oidc_connect_enabled"`
+	OIDCConnectProviderName           string `json:"oidc_connect_provider_name"`
+	OIDCConnectClientID               string `json:"oidc_connect_client_id"`
+	OIDCConnectClientSecretConfigured bool   `json:"oidc_connect_client_secret_configured"`
+	OIDCConnectIssuerURL              string `json:"oidc_connect_issuer_url"`
+	OIDCConnectDiscoveryURL           string `json:"oidc_connect_discovery_url"`
+	OIDCConnectAuthorizeURL           string `json:"oidc_connect_authorize_url"`
+	OIDCConnectTokenURL               string `json:"oidc_connect_token_url"`
+	OIDCConnectUserInfoURL            string `json:"oidc_connect_userinfo_url"`
+	OIDCConnectJWKSURL                string `json:"oidc_connect_jwks_url"`
+	OIDCConnectScopes                 string `json:"oidc_connect_scopes"`
+	OIDCConnectRedirectURL            string `json:"oidc_connect_redirect_url"`
+	OIDCConnectFrontendRedirectURL    string `json:"oidc_connect_frontend_redirect_url"`
+	OIDCConnectTokenAuthMethod        string `json:"oidc_connect_token_auth_method"`
+	OIDCConnectUsePKCE                bool   `json:"oidc_connect_use_pkce"`
+	OIDCConnectValidateIDToken        bool   `json:"oidc_connect_validate_id_token"`
+	OIDCConnectAllowedSigningAlgs     string `json:"oidc_connect_allowed_signing_algs"`
+	OIDCConnectClockSkewSeconds       int    `json:"oidc_connect_clock_skew_seconds"`
+	OIDCConnectRequireEmailVerified   bool   `json:"oidc_connect_require_email_verified"`
+	OIDCConnectUserInfoEmailPath      string `json:"oidc_connect_userinfo_email_path"`
+	OIDCConnectUserInfoIDPath         string `json:"oidc_connect_userinfo_id_path"`
+	OIDCConnectUserInfoUsernamePath   string `json:"oidc_connect_userinfo_username_path"`
+
 	SiteName                    string           `json:"site_name"`
 	SiteLogo                    string           `json:"site_logo"`
 	SiteSubtitle                string           `json:"site_subtitle"`
@@ -132,6 +155,9 @@ type PublicSettings struct {
 	CustomMenuItems                  []CustomMenuItem `json:"custom_menu_items"`
 	CustomEndpoints                  []CustomEndpoint `json:"custom_endpoints"`
 	LinuxDoOAuthEnabled              bool             `json:"linuxdo_oauth_enabled"`
+	OIDCOAuthEnabled                 bool             `json:"oidc_oauth_enabled"`
+	OIDCOAuthProviderName            string           `json:"oidc_oauth_provider_name"`
+	SoraClientEnabled                bool             `json:"sora_client_enabled"`
 	BackendModeEnabled               bool             `json:"backend_mode_enabled"`
 	Version                          string           `json:"version"`
 }

backend/internal/handler/dto/types.go

 package dto
 
-import "time"
+import (
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/domain"
+)
 
 type User struct {
 	ID            int64     `json:"id"`
@@ -113,6 +117,7 @@ type AdminGroup struct {
 
 	// OpenAI Messages 调度配置（仅 openai 平台使用）
 	DefaultMappedModel          string                                   `json:"default_mapped_model"`
+	MessagesDispatchModelConfig domain.OpenAIMessagesDispatchModelConfig `json:"messages_dispatch_model_config"`
 
 	// 支持的模型系列（仅 antigravity 平台使用）
 	SupportedModelScopes    []string       `json:"supported_model_scopes"`

backend/internal/handler/openai_gateway_handler.go

@@ -47,6 +47,13 @@ func resolveOpenAIForwardDefaultMappedModel(apiKey *service.APIKey, fallbackMode
 	return strings.TrimSpace(apiKey.Group.DefaultMappedModel)
 }
 
+func resolveOpenAIMessagesDispatchMappedModel(apiKey *service.APIKey, requestedModel string) string {
+	if apiKey == nil || apiKey.Group == nil {
+		return ""
+	}
+	return strings.TrimSpace(apiKey.Group.ResolveMessagesDispatchModel(requestedModel))
+}
+
 // NewOpenAIGatewayHandler creates a new OpenAIGatewayHandler
 func NewOpenAIGatewayHandler(
 	gatewayService *service.OpenAIGatewayService,
@@ -551,6 +558,7 @@ func (h *OpenAIGatewayHandler) Messages(c *gin.Context) {
 	}
 	reqModel := modelResult.String()
 	routingModel := service.NormalizeOpenAICompatRequestedModel(reqModel)
+	preferredMappedModel := resolveOpenAIMessagesDispatchMappedModel(apiKey, reqModel)
 	reqStream := gjson.GetBytes(body, "stream").Bool()
 
 	reqLog = reqLog.With(zap.String("model", reqModel), zap.Bool("stream", reqStream))
@@ -609,17 +617,20 @@ func (h *OpenAIGatewayHandler) Messages(c *gin.Context) {
 	failedAccountIDs := make(map[int64]struct{})
 	sameAccountRetryCount := make(map[int64]int)
 	var lastFailoverErr *service.UpstreamFailoverError
+	effectiveMappedModel := preferredMappedModel
 
 	for {
-		// 清除上一次迭代的降级模型标记，避免残留影响本次迭代
-		c.Set("openai_messages_fallback_model", "")
+		currentRoutingModel := routingModel
+		if effectiveMappedModel != "" {
+			currentRoutingModel = effectiveMappedModel
+		}
 		reqLog.Debug("openai_messages.account_selecting", zap.Int("excluded_account_count", len(failedAccountIDs)))
 		selection, scheduleDecision, err := h.gatewayService.SelectAccountWithScheduler(
 			c.Request.Context(),
 			apiKey.GroupID,
 			"", // no previous_response_id
 			sessionHash,
-			routingModel,
+			currentRoutingModel,
 			failedAccountIDs,
 			service.OpenAIUpstreamTransportAny,
 		)
@@ -628,29 +639,7 @@ func (h *OpenAIGatewayHandler) Messages(c *gin.Context) {
 				zap.Error(err),
 				zap.Int("excluded_account_count", len(failedAccountIDs)),
 			)
-			// 首次调度失败 + 有默认映射模型 → 用默认模型重试
 			if len(failedAccountIDs) == 0 {
-				defaultModel := ""
-				if apiKey.Group != nil {
-					defaultModel = apiKey.Group.DefaultMappedModel
-				}
-				if defaultModel != "" && defaultModel != routingModel {
-					reqLog.Info("openai_messages.fallback_to_default_model",
-						zap.String("default_mapped_model", defaultModel),
-					)
-					selection, scheduleDecision, err = h.gatewayService.SelectAccountWithScheduler(
-						c.Request.Context(),
-						apiKey.GroupID,
-						"",
-						sessionHash,
-						defaultModel,
-						failedAccountIDs,
-						service.OpenAIUpstreamTransportAny,
-					)
-					if err == nil && selection != nil {
-						c.Set("openai_messages_fallback_model", defaultModel)
-					}
-				}
 				if err != nil {
 					h.anthropicStreamingAwareError(c, http.StatusServiceUnavailable, "api_error", "Service temporarily unavailable", streamStarted)
 					return
@@ -682,9 +671,7 @@ func (h *OpenAIGatewayHandler) Messages(c *gin.Context) {
 		service.SetOpsLatencyMs(c, service.OpsRoutingLatencyMsKey, time.Since(routingStart).Milliseconds())
 		forwardStart := time.Now()
 
-		// Forward 层需要始终拿到 group 默认映射模型，这样未命中账号级映射的
-		// Claude 兼容模型才不会在后续 Codex 规范化中意外退化到 gpt-5.1。
-		defaultMappedModel := resolveOpenAIForwardDefaultMappedModel(apiKey, c.GetString("openai_messages_fallback_model"))
+		defaultMappedModel := strings.TrimSpace(effectiveMappedModel)
 		// 应用渠道模型映射到请求体
 		forwardBody := body
 		if channelMappingMsg.Mapped {

backend/internal/handler/openai_gateway_handler_test.go

@@ -360,7 +360,7 @@ func TestResolveOpenAIForwardDefaultMappedModel(t *testing.T) {
 		require.Equal(t, "gpt-5.2", resolveOpenAIForwardDefaultMappedModel(apiKey, " gpt-5.2 "))
 	})
 
-	t.Run("uses_group_default_on_normal_path", func(t *testing.T) {
+	t.Run("uses_group_default_when_explicit_fallback_absent", func(t *testing.T) {
 		apiKey := &service.APIKey{
 			Group: &service.Group{DefaultMappedModel: "gpt-5.4"},
 		}
@@ -376,6 +376,45 @@ func TestResolveOpenAIForwardDefaultMappedModel(t *testing.T) {
 	})
 }
 
+func TestResolveOpenAIMessagesDispatchMappedModel(t *testing.T) {
+	t.Run("exact_claude_model_override_wins", func(t *testing.T) {
+		apiKey := &service.APIKey{
+			Group: &service.Group{
+				MessagesDispatchModelConfig: service.OpenAIMessagesDispatchModelConfig{
+					SonnetMappedModel: "gpt-5.2",
+					ExactModelMappings: map[string]string{
+						"claude-sonnet-4-5-20250929": "gpt-5.4-mini-high",
+					},
+				},
+			},
+		}
+		require.Equal(t, "gpt-5.4-mini", resolveOpenAIMessagesDispatchMappedModel(apiKey, "claude-sonnet-4-5-20250929"))
+	})
+
+	t.Run("uses_family_default_when_no_override", func(t *testing.T) {
+		apiKey := &service.APIKey{Group: &service.Group{}}
+		require.Equal(t, "gpt-5.4", resolveOpenAIMessagesDispatchMappedModel(apiKey, "claude-opus-4-6"))
+		require.Equal(t, "gpt-5.3-codex", resolveOpenAIMessagesDispatchMappedModel(apiKey, "claude-sonnet-4-5-20250929"))
+		require.Equal(t, "gpt-5.4-mini", resolveOpenAIMessagesDispatchMappedModel(apiKey, "claude-haiku-4-5-20251001"))
+	})
+
+	t.Run("returns_empty_for_non_claude_or_missing_group", func(t *testing.T) {
+		require.Empty(t, resolveOpenAIMessagesDispatchMappedModel(nil, "claude-sonnet-4-5-20250929"))
+		require.Empty(t, resolveOpenAIMessagesDispatchMappedModel(&service.APIKey{}, "claude-sonnet-4-5-20250929"))
+		require.Empty(t, resolveOpenAIMessagesDispatchMappedModel(&service.APIKey{Group: &service.Group{}}, "gpt-5.4"))
+	})
+
+	t.Run("does_not_fall_back_to_group_default_mapped_model", func(t *testing.T) {
+		apiKey := &service.APIKey{
+			Group: &service.Group{
+				DefaultMappedModel: "gpt-5.4",
+			},
+		}
+		require.Empty(t, resolveOpenAIMessagesDispatchMappedModel(apiKey, "gpt-5.4"))
+		require.Equal(t, "gpt-5.3-codex", resolveOpenAIMessagesDispatchMappedModel(apiKey, "claude-sonnet-4-5-20250929"))
+	})
+}
+
 func TestOpenAIResponses_MissingDependencies_ReturnsServiceUnavailable(t *testing.T) {
 	gin.SetMode(gin.TestMode)