Add GTL price-traffic chart diagnostic

frontend/src/api/sr-levels.ts

@@ -1,8 +1,14 @@
 import apiClient from './client';
-import type { SRLevelResponse } from '../lib/types';
+import type { GateTargetLadderResponse, SRLevelResponse } from '../lib/types';
 
 export function getLevels(symbol: string) {
   return apiClient
     .get<SRLevelResponse>(`sr-levels/${symbol}`)
     .then((r) => r.data);
 }
+
+export function getGateTargetLadder(symbol: string) {
+  return apiClient
+    .get<GateTargetLadderResponse>(`gate-target-ladder/${symbol}`)
+    .then((r) => r.data);
+}