feat: add workbench AI integration

internal/config/config.go

@@ -19,6 +19,7 @@ type Config struct {
 	Kafka        KafkaConfig   `json:"kafka"`
 	Auth         AuthConfig    `json:"auth"`
 	Manager      ManagerConfig `json:"manager"`
+	AI           AIConfig      `json:"ai"`
 	ReadTimeout  time.Duration `json:"-"`
 	WriteTimeout time.Duration `json:"-"`
 }
@@ -70,6 +71,22 @@ type ManagerConfig struct {
 	TimeoutMS   int      `json:"timeout_ms"`
 }
 
+type AIConfig struct {
+	Provider        string         `json:"provider"`
+	DeepSeek        DeepSeekConfig `json:"deepseek"`
+	DefaultModel    string         `json:"default_model"`
+	ComplexModel    string         `json:"complex_model"`
+	Temperature     float64        `json:"temperature"`
+	MaxOutputTokens int            `json:"max_output_tokens"`
+}
+
+type DeepSeekConfig struct {
+	BaseURL    string `json:"base_url"`
+	APIKey     string `json:"api_key"`
+	TimeoutMS  int    `json:"timeout_ms"`
+	MaxRetries int    `json:"max_retries"`
+}
+
 func Load() (*Config, error) {
 	cfg := defaultConfig()
 	if path := strings.TrimSpace(os.Getenv("IM_WORKBENCH_CONFIG")); path != "" {
@@ -92,7 +109,7 @@ func defaultConfig() *Config {
 	return &Config{
 		Listen: ":6061",
 		MySQL: MySQLConfig{
-			DSN:          "root:root@tcp(127.0.0.1:3306)/meeting_im?parseTime=true&charset=utf8mb4,utf8&loc=Local",
+			DSN:          "root:root@tcp(127.0.0.1:3306)/workbench?parseTime=true&charset=utf8mb4,utf8&loc=Local",
 			MaxOpenConns: 15,
 			MaxIdleConns: 5,
 		},
@@ -116,6 +133,18 @@ func defaultConfig() *Config {
 			UIDKeyKeys:  []string{"uid_encryption_key", "UID_ENCRYPTION_KEY", "uid_key"},
 			TimeoutMS:   3000,
 		},
+		AI: AIConfig{
+			Provider:        "deepseek",
+			DefaultModel:    "deepseek-flash",
+			ComplexModel:    "deepseek-v4-pro",
+			Temperature:     0.2,
+			MaxOutputTokens: 4096,
+			DeepSeek: DeepSeekConfig{
+				BaseURL:    "https://api.deepseek.com",
+				TimeoutMS:  60000,
+				MaxRetries: 2,
+			},
+		},
 		ReadTimeout:  8 * time.Second,
 		WriteTimeout: 8 * time.Second,
 	}
@@ -144,6 +173,15 @@ func applyEnv(cfg *Config) {
 	setString(&cfg.Manager.ServiceName, "IM_WORKBENCH_MANAGER_SERVICE_NAME")
 	setString(&cfg.Manager.Secret, "IM_WORKBENCH_MANAGER_SECRET")
 	setString(&cfg.Manager.UIDKeyGroup, "IM_WORKBENCH_MANAGER_UID_KEY_GROUP")
+	setString(&cfg.AI.Provider, "IM_WORKBENCH_AI_PROVIDER")
+	setString(&cfg.AI.DeepSeek.BaseURL, "DEEPSEEK_BASE_URL")
+	setString(&cfg.AI.DeepSeek.APIKey, "DEEPSEEK_API_KEY")
+	setString(&cfg.AI.DefaultModel, "DEEPSEEK_DEFAULT_MODEL")
+	setString(&cfg.AI.ComplexModel, "DEEPSEEK_COMPLEX_MODEL")
+	setInt(&cfg.AI.DeepSeek.TimeoutMS, "DEEPSEEK_TIMEOUT_MS")
+	setInt(&cfg.AI.DeepSeek.MaxRetries, "DEEPSEEK_MAX_RETRIES")
+	setInt(&cfg.AI.MaxOutputTokens, "DEEPSEEK_MAX_OUTPUT_TOKENS")
+	setFloat(&cfg.AI.Temperature, "DEEPSEEK_TEMPERATURE")
 	if strings.TrimSpace(cfg.Auth.InternalSecret) == "" {
 		setString(&cfg.Auth.InternalSecret, "IM_INTERNAL_API_SECRET")
 	}
@@ -200,7 +238,7 @@ func (c *Config) validate() error {
 		return fmt.Errorf("mysql dsn is invalid: %w", err)
 	}
 	if strings.EqualFold(strings.TrimSpace(parsedDSN.DBName), "tinode") {
-		return errors.New("mysql database tinode is deprecated; use meeting_im")
+		return errors.New("mysql database tinode is deprecated; use workbench")
 	}
 	if strings.TrimSpace(c.Redis.Addr) == "" && !c.Auth.SkipSessionInDev {
 		return errors.New("redis addr is required")
@@ -211,6 +249,27 @@ func (c *Config) validate() error {
 	if !strings.Contains(c.Auth.SessionKeyPattern, "%s") {
 		return fmt.Errorf("session key pattern must include %%s")
 	}
+	if strings.TrimSpace(c.AI.Provider) == "" {
+		c.AI.Provider = "deepseek"
+	}
+	if strings.TrimSpace(c.AI.DeepSeek.BaseURL) == "" {
+		c.AI.DeepSeek.BaseURL = "https://api.deepseek.com"
+	}
+	if c.AI.DeepSeek.TimeoutMS <= 0 {
+		c.AI.DeepSeek.TimeoutMS = 60000
+	}
+	if strings.TrimSpace(c.AI.DefaultModel) == "" {
+		c.AI.DefaultModel = "deepseek-flash"
+	}
+	if strings.TrimSpace(c.AI.ComplexModel) == "" {
+		c.AI.ComplexModel = c.AI.DefaultModel
+	}
+	if c.AI.Temperature == 0 {
+		c.AI.Temperature = 0.2
+	}
+	if c.AI.MaxOutputTokens <= 0 {
+		c.AI.MaxOutputTokens = 4096
+	}
 	return nil
 }
 
@@ -237,6 +296,14 @@ func setBool(target *bool, key string) {
 	}
 }
 
+func setFloat(target *float64, key string) {
+	if value := strings.TrimSpace(os.Getenv(key)); value != "" {
+		if parsed, err := strconv.ParseFloat(value, 64); err == nil {
+			*target = parsed
+		}
+	}
+}
+
 func splitCSV(value string) []string {
 	parts := strings.Split(value, ",")
 	items := make([]string, 0, len(parts))

internal/config/config_test.go

@@ -15,13 +15,13 @@ func TestValidateRejectsDeprecatedTinodeDatabase(t *testing.T) {
 	}
 }
 
-func TestDefaultConfigUsesMeetingIMDatabase(t *testing.T) {
+func TestDefaultConfigUsesWorkbenchDatabase(t *testing.T) {
 	cfg := defaultConfig()
 	if err := cfg.validate(); err != nil {
 		t.Fatalf("default config validation failed: %v", err)
 	}
-	if !strings.Contains(cfg.MySQL.DSN, "/meeting_im?") {
-		t.Fatalf("default mysql dsn = %q, want meeting_im database", cfg.MySQL.DSN)
+	if !strings.Contains(cfg.MySQL.DSN, "/workbench?") {
+		t.Fatalf("default mysql dsn = %q, want workbench database", cfg.MySQL.DSN)
 	}
 	if cfg.MySQL.MaxOpenConns != 15 || cfg.MySQL.MaxIdleConns != 5 {
 		t.Fatalf("default mysql pool = %d/%d, want 15/5", cfg.MySQL.MaxOpenConns, cfg.MySQL.MaxIdleConns)