docs: 修正全部文档使其与源码实现一致

主仓库：
- 修复 4 份英文文档语言切换链接指向错误 (../zh/ → ../en/)
- ARCHITECTURE.md 标题 "三种加载方式" → "四种加载方式" (实际表格4行)
- PLUGIN_DEV.md 示例表: 添加 webfetch, 移除不存在的 luaplugintest/testlua
- PLUGIN_DEV.md 代码示例: InjectInput/InjectInterrupt → InjectText/InjectInterruptText
- PLUGIN_DEV.md 代码示例: Memory/Knowledge/LLM/Events 接口签名修正
- PLUGIN_DEV.md .hmap 内容统一, plugindev 编译去除 .exe 后缀

SDK 仓库:
- Plugin.Start(sdk *PluginSDK) 接口签名改为指针
- 方法表重写: 移除 CallLLM/QueryKnowledge/SetMemory 等不存在方法
- IOInjector 参数顺序修正为 (source, channel, text)
- 删除虚构 SDKConfig, 替换为实际 New() 构造函数签名
- .hmap 内容描述一致化

修正前一次会话中的 QQ/Bili 插件问题:
- qq napcat() 超时, fetchBotInfo 竞态, handleWebhook 同步阻塞
- bili CDN 直连失败, 添加 HTTP_PROXY 代理

internal/lua/vm.go

@@ -4,9 +4,13 @@ import (
 	"embed"
 	"encoding/json"
 	"fmt"
+	"io"
+	"net/http"
 	"os"
 	"path/filepath"
+	"strings"
 	"sync"
+	"time"
 
 	lua "github.com/yuin/gopher-lua"
 )
@@ -68,14 +72,34 @@ func (c *AdapterCache) setupGlobals() {
 
 	s.SetGlobal("http_get", s.NewFunction(func(L *lua.LState) int {
 		url := L.ToString(1)
-		L.Push(lua.LString(fmt.Sprintf(`{"url":%q,"status":200,"body":"mock"}`, url)))
+		client := &http.Client{Timeout: 30 * time.Second}
+		resp, err := client.Get(url)
+		if err != nil {
+			errJSON, _ := json.Marshal(map[string]interface{}{"url": url, "error": err.Error()})
+			L.Push(lua.LString(string(errJSON)))
+			return 1
+		}
+		defer resp.Body.Close()
+		body, _ := io.ReadAll(resp.Body)
+		result, _ := json.Marshal(map[string]interface{}{"url": url, "status": resp.StatusCode, "body": string(body)})
+		L.Push(lua.LString(string(result)))
 		return 1
 	}))
 
 	s.SetGlobal("http_post", s.NewFunction(func(L *lua.LState) int {
 		url := L.ToString(1)
 		body := L.ToString(2)
-		L.Push(lua.LString(fmt.Sprintf(`{"url":%q,"body":%q,"status":200}`, url, body)))
+		client := &http.Client{Timeout: 30 * time.Second}
+		resp, err := client.Post(url, "application/json", strings.NewReader(body))
+		if err != nil {
+			errJSON, _ := json.Marshal(map[string]interface{}{"url": url, "error": err.Error()})
+			L.Push(lua.LString(string(errJSON)))
+			return 1
+		}
+		defer resp.Body.Close()
+		respBody, _ := io.ReadAll(resp.Body)
+		result, _ := json.Marshal(map[string]interface{}{"url": url, "body": string(respBody), "status": resp.StatusCode})
+		L.Push(lua.LString(string(result)))
 		return 1
 	}))
 }