feat: add conversation_id and user_id in chatflow/workflow system vars (#3771)

Co-authored-by: Joel <iamjoel007@gmail.com>

web/app/components/workflow/nodes/_base/components/variable/utils.ts

@@ -80,7 +80,15 @@ const formatItem = (item: any, isChatMode: boolean, filterVar: (payload: Var, se
           variable: 'sys.query',
           type: VarType.string,
         })
+        res.vars.push({
+          variable: 'sys.conversation_id',
+          type: VarType.string,
+        })
       }
+      res.vars.push({
+        variable: 'sys.user_id',
+        type: VarType.string,
+      })
       res.vars.push({
         variable: 'sys.files',
         type: VarType.arrayFile,

web/app/components/workflow/nodes/start/panel.tsx

@@ -70,6 +70,7 @@ const Panel: FC<NodePanelProps<StartNodeType>> = ({
                     }
                   />)
               }
+
               <VarItem
                 readonly
                 payload={{
@@ -81,6 +82,32 @@ const Panel: FC<NodePanelProps<StartNodeType>> = ({
                   </div>
                 }
               />
+              {
+                isChatMode && (
+                  <VarItem
+                    readonly
+                    payload={{
+                      variable: 'sys.conversation_id',
+                    } as any}
+                    rightContent={
+                      <div className='text-xs font-normal text-gray-500'>
+                        String
+                      </div>
+                    }
+                  />
+                )
+              }
+              <VarItem
+                readonly
+                payload={{
+                  variable: 'sys.user_id',
+                } as any}
+                rightContent={
+                  <div className='text-xs font-normal text-gray-500'>
+                    String
+                  </div>
+                }
+              />
             </div>
 
           </>