feat: 抖音直播间弹幕监控 - Go+Wails 实现

后端:
- SQLite 数据层 (rooms/users/chat_logs/settings/error_logs)
- 抖音 WebSocket 抓取器 (proto 解析, 心跳, watchdog)
- __ac_signature 算法 (纯 Go 移植)
- a_bogus/sign.js 签名 (goja JS 引擎)
- Echo HTTP API 服务器 (端口 5000)
- SSE 事件广播
- 自动保活 + 授权守护
- PAYS 云授权对接

前端:
- 顶栏: 品牌 + 日志/调试/客户名单/授权/文档/房间控制/主题切换
- 添加直播间 (链接解析 + 关键词)
-  Dashboard (卡片/列表视图, 公开/匿名房筛选, 分页)
- 详情页 (多 tab 消息流, 右侧用户面板, 颜色标记, 精准客户, 已看标记)
- 精准客户名单 (跨房间汇总)
- 订阅授权页面 (登录/注册/购买)
- 使用帮助 + 系统调试
- 白昼/黑夜主题切换 (CSS 变量 + iconfont)
- 底部版权栏

main.go

@@ -0,0 +1,77 @@
+package main
+
+import (
+	"context"
+	"embed"
+	"log"
+	"net/http"
+	"sync/atomic"
+	"time"
+
+	"github.com/wailsapp/wails/v2"
+	"github.com/wailsapp/wails/v2/pkg/options"
+	"github.com/wailsapp/wails/v2/pkg/options/assetserver"
+	"github.com/wailsapp/wails/v2/pkg/options/windows"
+	"github.com/wailsapp/wails/v2/pkg/runtime"
+
+	"github.com/qingwuyingxing/douyin-live-fetcher/internal/api"
+	"github.com/qingwuyingxing/douyin-live-fetcher/internal/broadcaster"
+	"github.com/qingwuyingxing/douyin-live-fetcher/internal/db"
+)
+
+//go:embed all:frontend/dist
+//go:embed assets/icon.png
+//go:embed build/windows/icon.ico
+var assets embed.FS
+
+var (
+	forceQuit atomic.Bool
+)
+
+func main() {
+	if err := db.InitDB(); err != nil {
+		log.Printf("[main] db init error: %v", err)
+	}
+
+	bc := broadcaster.NewBroadcaster()
+
+	go func() {
+		if err := api.StartServer(bc, http.FS(assets), 5000); err != nil {
+			log.Printf("[main] API server error: %v", err)
+		}
+	}()
+
+	for i := 0; i < 30; i++ {
+		if resp, err := http.Get("http://127.0.0.1:5000/api/status"); err == nil {
+			resp.Body.Close()
+			break
+		}
+		time.Sleep(200 * time.Millisecond)
+	}
+	log.Println("[main] API server ready")
+
+	cfg := &options.App{
+		Title:            "青梧映星",
+		Width:            1280,
+		Height:           800,
+		MinWidth:         1024,
+		MinHeight:        600,
+		WindowStartState: options.Normal,
+		AssetServer: &assetserver.Options{Assets: assets},
+		BackgroundColour: &options.RGBA{R: 27, G: 38, B: 54, A: 1},
+		Windows: &windows.Options{Theme: windows.SystemDefault},
+		OnBeforeClose: func(ctx context.Context) bool {
+			if forceQuit.Load() { return false }
+			runtime.WindowHide(ctx)
+			return true
+		},
+		OnShutdown: func(context.Context) {
+			forceQuit.Store(true)
+		},
+		Bind: []interface{}{&App{}},
+	}
+
+	if err := wails.Run(cfg); err != nil {
+		log.Fatal(err)
+	}
+}