feat: 初始提交 - Code Server Bridge完整实现

- OAuth认证系统（Gitea + Lua扩展）
- Git自动化操作（本地/SSH远程）
- 实时进度WebSocket推送
- 现代化Tab界面UI
- Cobra CLI命令行（init/version/serve）
- 完整构建系统（Makefile + Taskfile）
- UPX压缩支持（体积减少70%）

internal/oauth/lua_provider.go

@@ -0,0 +1,86 @@
+package oauth
+
+import (
+	"cs-bridge/internal/auth"
+	"cs-bridge/pkg/lua"
+	"fmt"
+
+	lua2 "github.com/yuin/gopher-lua"
+)
+
+type LuaProvider struct {
+	model       ProviderModel
+	engine      *lua.Engine
+	redirectURI string
+}
+
+// NewLuaProvider creates a new Lua-based provider
+func NewLuaProvider(model ProviderModel, redirectURI, scriptPath string) (*LuaProvider, error) {
+	engine := lua.New()
+
+	// Register all API modules (http, json, log, util)
+	engine.RegisterAPI()
+
+	// Load the Lua script
+	if err := engine.LoadFile(scriptPath); err != nil {
+		engine.Close()
+		return nil, err
+	}
+
+	return &LuaProvider{
+		model:       model,
+		engine:      engine,
+		redirectURI: redirectURI,
+	}, nil
+}
+
+// Close cleans up the Lua engine
+func (p *LuaProvider) Close() {
+	p.engine.Close()
+}
+
+// Name implements [Provider].
+func (p *LuaProvider) Name() string {
+	return p.model.Name
+}
+
+// luaConfig constructs the config table passed to Lua functions
+func (p *LuaProvider) luaConfig() *lua2.LTable {
+	L := p.engine.L
+	config := L.NewTable()
+	config.RawSetString("client_id", lua2.LString(p.model.ClientID))
+	config.RawSetString("client_secret", lua2.LString(p.model.ClientSecret))
+	config.RawSetString("base_url", lua2.LString(p.model.BaseURL))
+	config.RawSetString("authorize_url", lua2.LString(p.model.AuthorizeURL))
+	config.RawSetString("token_url", lua2.LString(p.model.TokenURL))
+	config.RawSetString("user_url", lua2.LString(p.model.UserURL))
+	config.RawSetString("redirect_uri", lua2.LString(p.redirectURI))
+	return config
+}
+
+// AuthURL implements [Provider].
+func (p *LuaProvider) AuthURL(state string) (string, error) {
+	cfg := p.luaConfig()
+	return p.engine.CallString("auth_url", cfg, lua2.LString(state))
+}
+
+// Exchange implements [Provider].
+func (p *LuaProvider) Exchange(code string) (string, error) {
+	cfg := p.luaConfig()
+	return p.engine.CallString("exchange", cfg, lua2.LString(code))
+}
+
+// UserInfo implements [Provider].
+func (p *LuaProvider) UserInfo(token string) (auth.Identify, error) {
+	cfg := p.luaConfig()
+
+	var userInfo auth.Identify
+	if err := p.engine.CallStruct("user_info", &userInfo, cfg, lua2.LString(token)); err != nil {
+		return auth.Identify{}, fmt.Errorf("failed to get user info: %w", err)
+	}
+
+	// Set the provider name
+	userInfo.Provider = p.model.Name
+
+	return userInfo, nil
+}