refactor(agents): extract shared session dir resolver

src/gateway/server-startup.ts

@@ -1,6 +1,3 @@
-import type { Dirent } from "node:fs";
-import fs from "node:fs/promises";
-import path from "node:path";
 import type { CliDeps } from "../cli/deps.js";
 import type { loadConfig } from "../config/config.js";
 import type { loadOpenClawPlugins } from "../plugins/loader.js";
@@ -11,6 +8,7 @@ import {
   resolveConfiguredModelRef,
   resolveHooksGmailModel,
 } from "../agents/model-selection.js";
+import { resolveAgentSessionDirs } from "../agents/session-dirs.js";
 import { cleanStaleLockFiles } from "../agents/session-write-lock.js";
 import { resolveStateDir } from "../config/paths.js";
 import { startGmailWatcher } from "../hooks/gmail-watcher.js";
@@ -31,25 +29,6 @@ import { startGatewayMemoryBackend } from "./server-startup-memory.js";
 
 const SESSION_LOCK_STALE_MS = 30 * 60 * 1000;
 
-async function resolveAgentSessionDirs(stateDir: string): Promise<string[]> {
-  const agentsDir = path.join(stateDir, "agents");
-  let entries: Dirent[] = [];
-  try {
-    entries = await fs.readdir(agentsDir, { withFileTypes: true });
-  } catch (err) {
-    const code = (err as { code?: string }).code;
-    if (code === "ENOENT") {
-      return [];
-    }
-    throw err;
-  }
-
-  return entries
-    .filter((entry) => entry.isDirectory())
-    .map((entry) => path.join(agentsDir, entry.name, "sessions"))
-    .toSorted((a, b) => a.localeCompare(b));
-}
-
 export async function startGatewaySidecars(params: {
   cfg: ReturnType<typeof loadConfig>;
   pluginRegistry: ReturnType<typeof loadOpenClawPlugins>;