style: format code and modernize loop syntax

- Align struct fields and constants in gjson/config.go
- Add missing newline at EOF in gjson/decode.go
- Remove trailing blank line in gjson/encode.go
- Remove extra blank line in internal/lua/coroutine.go
- Use modern for range syntax in internal/lua/pool.go

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

gjson/config.go

@@ -2,14 +2,14 @@ package gjson
 
 // Default configuration values (matching lua-cjson defaults)
 const (
-	defaultEncodeSparseConvert  = false
-	defaultEncodeSparseRatio    = 2
-	defaultEncodeSparseSafe     = 10
-	defaultEncodeMaxDepth       = 1000
-	defaultDecodeMaxDepth       = 1000
+	defaultEncodeSparseConvert   = false
+	defaultEncodeSparseRatio     = 2
+	defaultEncodeSparseSafe      = 10
+	defaultEncodeMaxDepth        = 1000
+	defaultDecodeMaxDepth        = 1000
 	defaultEncodeNumberPrecision = 14
-	defaultEncodeKeepBuffer     = true
-	defaultEncodeSortKeys       = false // 默认不排序，保持高性能
+	defaultEncodeKeepBuffer      = true
+	defaultEncodeSortKeys        = false // 默认不排序，保持高性能
 )
 
 // sparseArrayConfig controls sparse array handling during encoding.
@@ -21,12 +21,12 @@ type sparseArrayConfig struct {
 
 // Config holds all configuration options for a GJSON instance.
 type Config struct {
-	encodeSparseArray    sparseArrayConfig
-	encodeMaxDepth       int
-	decodeMaxDepth       int
+	encodeSparseArray     sparseArrayConfig
+	encodeMaxDepth        int
+	decodeMaxDepth        int
 	encodeNumberPrecision int
-	encodeKeepBuffer     bool
-	encodeSortKeys       bool // 是否对 object 键排序（稳定输出）
+	encodeKeepBuffer      bool
+	encodeSortKeys        bool // 是否对 object 键排序（稳定输出）
 }
 
 // defaultConfig returns a new Config with default values.
@@ -37,11 +37,11 @@ func defaultConfig() *Config {
 			ratio:   defaultEncodeSparseRatio,
 			safe:    defaultEncodeSparseSafe,
 		},
-		encodeMaxDepth:       defaultEncodeMaxDepth,
-		decodeMaxDepth:       defaultDecodeMaxDepth,
+		encodeMaxDepth:        defaultEncodeMaxDepth,
+		decodeMaxDepth:        defaultDecodeMaxDepth,
 		encodeNumberPrecision: defaultEncodeNumberPrecision,
-		encodeKeepBuffer:     defaultEncodeKeepBuffer,
-		encodeSortKeys:       defaultEncodeSortKeys,
+		encodeKeepBuffer:      defaultEncodeKeepBuffer,
+		encodeSortKeys:        defaultEncodeSortKeys,
 	}
 }
 
@@ -53,10 +53,10 @@ func (c *Config) Clone() *Config {
 			ratio:   c.encodeSparseArray.ratio,
 			safe:    c.encodeSparseArray.safe,
 		},
-		encodeMaxDepth:       c.encodeMaxDepth,
-		decodeMaxDepth:       c.decodeMaxDepth,
+		encodeMaxDepth:        c.encodeMaxDepth,
+		decodeMaxDepth:        c.decodeMaxDepth,
 		encodeNumberPrecision: c.encodeNumberPrecision,
-		encodeKeepBuffer:     c.encodeKeepBuffer,
-		encodeSortKeys:       c.encodeSortKeys,
+		encodeKeepBuffer:      c.encodeKeepBuffer,
+		encodeSortKeys:        c.encodeSortKeys,
 	}
 }

gjson/decode.go

@@ -108,4 +108,4 @@ func parseJSONNumber(s string) (glua.LNumber, error) {
 	}
 
 	return glua.LNumber(0), fmt.Errorf("invalid number format: %s", s)
-}
+}

gjson/encode.go

@@ -267,4 +267,3 @@ func formatNumber(n float64, precision int) string {
 	// Use 'g' format for floating point
 	return strconv.FormatFloat(n, 'g', precision, 64)
 }
-

internal/lua/coroutine.go

@@ -368,7 +368,6 @@ func (c *LuaCoroutine) executeProto(proto *glua.FunctionProto) error {
 	fn := c.Co.NewFunctionFromProto(proto)
 	c.Co.Push(fn)
 	err := c.Co.PCall(0, 0, nil)
-
 	if err != nil {
 		atomic.AddUint64(&c.Engine.stats.ScriptsErrors, 1)
 		return fmt.Errorf("lua execution error: %w", err)

internal/lua/pool.go

@@ -50,7 +50,7 @@ func NewLStatePool(factory func() *glua.LState, initialSize, maxSize int) *LStat
 	}
 
 	// 预热：预先创建 initialSize 个 LState
-	for i := 0; i < initialSize; i++ {
+	for range initialSize {
 		L := p.factory()
 		p.pool = append(p.pool, L)
 		p.current++