fix: keep login responsive during background organize

internal/config/config.go

@@ -21,6 +21,11 @@ import (
 // EnvPrefix 是所有环境变量驱动的覆盖使用的前缀。
 const EnvPrefix = "MEDIASTATION"
 
+const (
+	defaultDatabaseMaxOpenConns = 4
+	defaultDatabaseMaxIdleConns = 2
+)
+
 // Config 是根配置聚合。
 type Config struct {
 	App          AppConfig          `mapstructure:"app"`
@@ -226,8 +231,8 @@ func setDefaults(v *viper.Viper) {
 	v.SetDefault("database.wal_mode", true)
 	v.SetDefault("database.busy_timeout", 5000)
 	v.SetDefault("database.cache_size", -20000)
-	v.SetDefault("database.max_open_conns", 1)
-	v.SetDefault("database.max_idle_conns", 1)
+	v.SetDefault("database.max_open_conns", defaultDatabaseMaxOpenConns)
+	v.SetDefault("database.max_idle_conns", defaultDatabaseMaxIdleConns)
 
 	v.SetDefault("secrets.jwt_secret", "")
 
@@ -303,6 +308,15 @@ func (c *Config) normalize() error {
 	if c.Database.DBPath == "" {
 		c.Database.DBPath = filepath.Join(c.App.DataDir, "mediastation.db")
 	}
+	if c.Database.MaxOpenConns <= 1 {
+		c.Database.MaxOpenConns = defaultDatabaseMaxOpenConns
+	}
+	if c.Database.MaxIdleConns <= 0 || c.Database.MaxIdleConns > c.Database.MaxOpenConns {
+		c.Database.MaxIdleConns = defaultDatabaseMaxIdleConns
+		if c.Database.MaxIdleConns > c.Database.MaxOpenConns {
+			c.Database.MaxIdleConns = c.Database.MaxOpenConns
+		}
+	}
 	if c.Cache.CacheDir == "" {
 		c.Cache.CacheDir = filepath.Join(c.App.DataDir, "cache")
 	}
@@ -335,7 +349,3 @@ func asConfigFileNotFound(err error, target *viper.ConfigFileNotFoundError) bool
 	}
 	return false
 }
-
-
-
-

internal/config/config_test.go

@@ -28,6 +28,12 @@ func TestLoadDefaults(t *testing.T) {
 	if cfg.Database.DBPath == "" {
 		t.Fatalf("expected non-empty DBPath")
 	}
+	if cfg.Database.MaxOpenConns != defaultDatabaseMaxOpenConns {
+		t.Fatalf("expected default MaxOpenConns %d, got %d", defaultDatabaseMaxOpenConns, cfg.Database.MaxOpenConns)
+	}
+	if cfg.Database.MaxIdleConns != defaultDatabaseMaxIdleConns {
+		t.Fatalf("expected default MaxIdleConns %d, got %d", defaultDatabaseMaxIdleConns, cfg.Database.MaxIdleConns)
+	}
 	if cfg.Secrets.JWTSecret == "" {
 		t.Fatalf("expected auto-generated JWT secret")
 	}
@@ -62,3 +68,23 @@ func TestEnvOverride(t *testing.T) {
 		t.Fatalf("expected port 9090 from env, got %d", cfg.App.Port)
 	}
 }
+
+func TestLoadHealsHistoricalSingleConnectionDatabaseConfig(t *testing.T) {
+	dir := t.TempDir()
+	wd, _ := os.Getwd()
+	defer func() { _ = os.Chdir(wd) }()
+	if err := os.Chdir(dir); err != nil {
+		t.Fatalf("chdir: %v", err)
+	}
+	if err := os.WriteFile("config.yaml", []byte("database:\n  max_open_conns: 1\n  max_idle_conns: 1\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	cfg, err := Load()
+	if err != nil {
+		t.Fatalf("Load() error: %v", err)
+	}
+	if cfg.Database.MaxOpenConns != defaultDatabaseMaxOpenConns {
+		t.Fatalf("expected historical MaxOpenConns=1 to heal to %d, got %d", defaultDatabaseMaxOpenConns, cfg.Database.MaxOpenConns)
+	}
+}