goldenChat base source add

backend/src/main/java/com/goldenchart/trading/TradingMode.java

@@ -0,0 +1,27 @@
+package com.goldenchart.trading;
+
+/**
+ * 자동매매 실행 대상: 모의 / 실거래 / 병행.
+ */
+public enum TradingMode {
+    PAPER,
+    LIVE,
+    BOTH;
+
+    public static TradingMode fromString(String raw) {
+        if (raw == null || raw.isBlank()) return PAPER;
+        try {
+            return valueOf(raw.trim().toUpperCase());
+        } catch (IllegalArgumentException e) {
+            return PAPER;
+        }
+    }
+
+    public boolean usePaper() {
+        return this == PAPER || this == BOTH;
+    }
+
+    public boolean useLive() {
+        return this == LIVE || this == BOTH;
+    }
+}