chart data fixes

gateway/src/channels/websocket-handler.ts

@@ -16,7 +16,6 @@ import {
   type SnapshotMessage,
   type PatchMessage,
 } from '../workspace/index.js';
-import { resolutionToSeconds } from '../types/ohlc.js';
 
 /**
  * Safe JSON stringifier that handles BigInt values
@@ -487,7 +486,7 @@ export class WebSocketHandler {
           }
           const history = await ohlcService.fetchOHLC(
             payload.symbol,
-            resolutionToSeconds(payload.resolution),
+            payload.period_seconds,
             payload.from_time,
             payload.to_time,
             payload.countback