feat: add custom edge (#1061)

### What problem does this PR solve?
feat: add custom edge
feat: add flow card
feat: add store for canvas
#918 

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

web/src/utils/api.ts

@@ -81,4 +81,12 @@ export default {
   // system
   getSystemVersion: `${api_host}/system/version`,
   getSystemStatus: `${api_host}/system/status`,
+
+  // flow
+  listTemplates: `${api_host}/canvas/templates`,
+  listCanvas: `${api_host}/canvas/list`,
+  getCanvas: `${api_host}/canvas/get`,
+  removeCanvas: `${api_host}/canvas/rm`,
+  setCanvas: `${api_host}/canvas/set`,
+  resetCanvas: `${api_host}/canvas/reset`,
 };