fix: work js-api signature (#818)

* feat: enhance WorkAccessToken to include AgentID for improved token management

- Added AgentID field to WorkAccessToken struct.
- Updated NewWorkAccessToken function to accept AgentID as a parameter.
- Modified access token cache key to incorporate AgentID, ensuring unique cache entries per agent.

This change improves the handling of access tokens in a multi-agent environment.

* refactor: enhance WorkAccessToken to improve cache key handling

- Updated the AgentID field in WorkAccessToken struct to clarify its optional nature for distinguishing applications.
- Modified the access token cache key construction to support both new and legacy formats based on the presence of AgentID.
- Added comments for better understanding of the cache key logic and its compatibility with historical versions.

This change improves the flexibility and clarity of access token management in multi-agent scenarios.

* feat(work): add JsSdk method for JavaScript SDK integration

- Introduced a new JsSdk method in the Work struct to facilitate the creation of a Js instance.
- This addition enhances the functionality of the Work module by enabling JavaScript SDK support.

This change improves the integration capabilities for developers working with the WeChat Work API.

* fix gofmt

* refactor(jsapi): simplify signature generation in GetConfig and GetAgentConfig methods

- Replaced the use of strconv to format the signature string with fmt.Sprintf for improved readability.
- Updated the signature generation logic in both GetConfig and GetAgentConfig methods to use a single formatted string.

This change enhances code clarity and maintains functionality in the signature generation process.

* fix gofmt

* fix gofmt

* fix gofmt

* fix gofmt

* refactor(js): correct initialization of Config in GetConfig method

- Removed redundant initialization of the Config variable and ensured it is instantiated correctly before use.
- This change improves code clarity and maintains the intended functionality of the GetConfig method.

officialaccount/js/js.go

@@ -39,7 +39,6 @@ func (js *Js) SetJsTicketHandle(ticketHandle credential.JsTicketHandle) {
 // GetConfig 获取jssdk需要的配置参数
 // uri 为当前网页地址
 func (js *Js) GetConfig(uri string) (config *Config, err error) {
-	config = new(Config)
 	var accessToken string
 	accessToken, err = js.GetAccessToken()
 	if err != nil {
@@ -50,12 +49,11 @@ func (js *Js) GetConfig(uri string) (config *Config, err error) {
 	if err != nil {
 		return
 	}
-
 	nonceStr := util.RandomStr(16)
 	timestamp := util.GetCurrTS()
 	str := fmt.Sprintf("jsapi_ticket=%s&noncestr=%s&timestamp=%d&url=%s", ticketStr, nonceStr, timestamp, uri)
 	sigStr := util.Signature(str)
-
+	config = new(Config)
 	config.AppID = js.AppID
 	config.NonceStr = nonceStr
 	config.Timestamp = timestamp