settings: add Exchange API tab for instance system settings.

Allow configuring perpetual API keys and live trading from Settings, reusing the existing env save API.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/common/static/instance_settings_prefs.js

@@ -416,6 +416,41 @@
     }
   }
 
+  function collectSettingsExchangeApiValues() {
+    const panel = document.getElementById("settings-exchange-api-panel");
+    const values = {};
+    if (!panel) return values;
+    panel.querySelectorAll(".env-field-input[data-env-key]").forEach((el) => {
+      if (el.dataset.envSensitive === "1" && el.dataset.envDirty !== "1") {
+        return;
+      }
+      values[el.dataset.envKey] = el.value;
+    });
+    return values;
+  }
+
+  async function saveSettingsExchangeApi(restartAfter) {
+    const status = document.getElementById("settings-exchange-api-status");
+    setStatus(status, "保存中…");
+    try {
+      const data = await fetchJson("/api/settings/env", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ values: collectSettingsExchangeApiValues() }),
+      });
+      const needRestart = restartAfter || data.restart_required;
+      if (needRestart) {
+        setStatus(status, "已保存,正在重启实例…");
+        await restartInstance();
+        setStatus(status, "保存并重启完成,请刷新页面");
+      } else {
+        setStatus(status, "已保存(即时生效项已应用)");
+      }
+    } catch (e) {
+      setStatus(status, e.message || "保存失败", true);
+    }
+  }
+
   function installDelegatedHandlers() {
     if (document.documentElement.dataset.prefsDelegateBound === "1") return;
     document.documentElement.dataset.prefsDelegateBound = "1";
@@ -445,6 +480,16 @@
       if (target.closest("#pwd-save-btn")) {
         ev.preventDefault();
         void savePassword();
+        return;
+      }
+      if (target.closest("#settings-exchange-api-save")) {
+        ev.preventDefault();
+        void saveSettingsExchangeApi(false);
+        return;
+      }
+      if (target.closest("#settings-exchange-api-save-restart")) {
+        ev.preventDefault();
+        void saveSettingsExchangeApi(true);
       }
     });
   }
@@ -462,6 +507,8 @@
     bindClickOnce("env-config-save-restart", () => saveEnvConfig(true));
     bindClickOnce("env-config-reload", () => loadEnvConfig(true));
     bindClickOnce("pwd-save-btn", savePassword);
+    bindClickOnce("settings-exchange-api-save", () => saveSettingsExchangeApi(false));
+    bindClickOnce("settings-exchange-api-save-restart", () => saveSettingsExchangeApi(true));
   }
 
   function initPage() {