feat(lua): add LState pool configuration and fix coroutine error handling

- Add LStatePoolInitialSize and LStatePoolMaxSize config fields
- Set pool defaults to 100 initial / 1000 max (matching MaxConcurrentCoroutines)
- Fix middleware to return 500 on coroutine init failure instead of continuing
- Pass pool config from server init to Lua engine with zero-value fallbacks

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

internal/config/defaults.go

@@ -69,6 +69,8 @@ func DefaultConfig() *Config {
 					CodeCacheSize:           1000,
 					EnableFileWatch:         true,
 					MaxExecutionTime:        30 * time.Second,
+						LStatePoolInitialSize:   100,
+						LStatePoolMaxSize:       1000,
 				},
 			},
 			Static: []StaticConfig{{
@@ -335,6 +337,8 @@ func GenerateConfigYAML(cfg *Config) ([]byte, error) {
 	fmt.Fprintf(&buf, "    #     coroutine_stack_size: %d         # 协程栈大小（0=使用默认值）\n", cfg.Servers[0].Lua.GlobalSettings.CoroutineStackSize)
 	fmt.Fprintf(&buf, "    #     coroutine_pool_warmup: %d        # 协程池预热数量（0=不预热）\n", cfg.Servers[0].Lua.GlobalSettings.CoroutinePoolWarmup)
 	fmt.Fprintf(&buf, "    #     minimize_stack_memory: %v    # 最小化栈内存使用\n", cfg.Servers[0].Lua.GlobalSettings.MinimizeStackMemory)
+	fmt.Fprintf(&buf, "    #     lstate_pool_initial_size: %d   # LState池初始大小\n", cfg.Servers[0].Lua.GlobalSettings.LStatePoolInitialSize)
+	fmt.Fprintf(&buf, "    #     lstate_pool_max_size: %d       # LState池最大大小\n", cfg.Servers[0].Lua.GlobalSettings.LStatePoolMaxSize)
 	buf.WriteString("\n")
 
 	// static 配置

internal/config/variable_config.go

@@ -208,4 +208,10 @@ type LuaGlobalSettings struct {
 
 	// MinimizeStackMemory 启用栈内存自动收缩以减少内存占用
 	MinimizeStackMemory bool `yaml:"minimize_stack_memory"`
+
+	// LStatePoolInitialSize LState 池初始大小（预热数量）
+	LStatePoolInitialSize int `yaml:"lstate_pool_initial_size"`
+
+	// LStatePoolMaxSize LState 池最大大小（与 MaxConcurrentCoroutines 匹配）
+	LStatePoolMaxSize int `yaml:"lstate_pool_max_size"`
 }

internal/lua/config.go

@@ -87,8 +87,8 @@ func DefaultConfig() *Config {
 		EnableLoadLib:           false,
 		CoroutineStackSize:      64, // 优化：较小的栈减少内存分配
 		MinimizeStackMemory:     true,
-		CoroutinePoolWarmup:     4, // 预热4个协程结构
+		CoroutinePoolWarmup:     4,   // 预热4个协程结构
-		LStatePoolInitialSize:   10, // LState 池预热 10 个
+		LStatePoolInitialSize:   100, // LState 池预热 100 个
-		LStatePoolMaxSize:       100, // LState 池最大 100 个
+		LStatePoolMaxSize:       1000, // LState 池最大 1000 个（与 MaxConcurrentCoroutines 匹配）
 	}
 }

internal/lua/middleware.go

@@ -169,10 +169,9 @@ func (m *LuaMiddleware) Process(next fasthttp.RequestHandler) fasthttp.RequestHa
 
 		// 初始化协程
 		if err := luaCtx.InitCoroutine(); err != nil {
-			// 协程创建失败，记录错误并继续
+			// 协程创建失败，返回 500 错误，不继续执行后续处理器
 			ctx.Error(fmt.Sprintf("lua coroutine init failed: %v", err), fasthttp.StatusInternalServerError)
 			luaCtx.Release()
-			next(ctx)
 			return
 		}
 

internal/server/init.go

@@ -111,6 +111,8 @@ func initLuaEngine(luaCfg *config.LuaMiddlewareConfig) (*lua.LuaEngine, error) {
 		EnableOSLib:             false, // 安全默认值
 		EnableIOLib:             false,
 		EnableLoadLib:           false,
+			LStatePoolInitialSize:   luaCfg.GlobalSettings.LStatePoolInitialSize,
+			LStatePoolMaxSize:       luaCfg.GlobalSettings.LStatePoolMaxSize,
 	}
 
 	// 设置协程栈优化选项
@@ -138,6 +140,12 @@ func initLuaEngine(luaCfg *config.LuaMiddlewareConfig) (*lua.LuaEngine, error) {
 	}
 	if engineCfg.MaxExecutionTime == 0 {
 		engineCfg.MaxExecutionTime = 30 * time.Second
+		}
+		if engineCfg.LStatePoolInitialSize == 0 {
+			engineCfg.LStatePoolInitialSize = 100
+		}
+		if engineCfg.LStatePoolMaxSize == 0 {
+			engineCfg.LStatePoolMaxSize = 1000
 	}
 
 	engine, err := lua.NewEngine(engineCfg)