implement server plugin system

server/plugin-system/config-store.js

@@ -0,0 +1,30 @@
+const fs = require("fs");
+const path = require("path");
+
+async function load(filePath) {
+  try {
+    const content = await fs.promises.readFile(filePath, "utf-8");
+    return JSON.parse(content);
+  } catch {
+    return {};
+  }
+}
+
+async function save(filePath, data) {
+  await fs.promises.mkdir(path.dirname(filePath), { recursive: true });
+  await fs.promises.writeFile(filePath, JSON.stringify(data, null, 2));
+}
+
+function getEnabledVaults(config, pluginId) {
+  return config[pluginId]?.enabledVaults || [];
+}
+
+function setEnabledVaults(config, pluginId, vaultIds) {
+  if (!config[pluginId]) {
+    config[pluginId] = {};
+  }
+
+  config[pluginId].enabledVaults = vaultIds;
+}
+
+module.exports = { load, save, getEnabledVaults, setEnabledVaults };