feats:add custom headers override

web/src/components/table/channels/modals/EditChannelModal.jsx

@@ -1699,6 +1699,31 @@ const EditChannelModal = (props) => {
                     showClear
                   />
 
+                  <Form.TextArea
+                      field='header_override'
+                      label={t('请求头覆盖')}
+                      placeholder={
+                          t('此项可选，用于覆盖请求头参数') +
+                          '\n' + t('格式示例：') +
+                          '\n{\n  "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36 Edg/139.0.0.0"\n}'
+                      }
+                      autosize
+                      onChange={(value) => handleInputChange('header_override', value)}
+                      extraText={
+                        <div className="flex gap-2 flex-wrap">
+                          <Text
+                              className="!text-semi-color-primary cursor-pointer"
+                              onClick={() => handleInputChange('header_override', JSON.stringify({
+                                "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36 Edg/139.0.0.0"
+                              }, null, 2))}
+                          >
+                            {t('格式模板')}
+                          </Text>
+                        </div>
+                      }
+                      showClear
+                  />
+
 
                   <JSONEditor
                     key={`status_code_mapping-${isEdit ? channelId : 'new'}`}