judge: fix temp dir resolve

packages/hydrojudge/setting.yaml

@@ -7,7 +7,7 @@ tmp_dir:
   type: text
   name: tmp_dir
   desc: Temp directory
-  default: $TEMP/hydro/judge.tmp
+  default: $TEMP/hydro/judge
 tmpfs_size:
   type: text
   name: tmpfs_size

packages/hydrojudge/src/hosts/builtin.ts

@@ -21,7 +21,7 @@ const session = {
     config: { detail: system.get('hydrojudge.detail') },
     async fetchFile(name: string) {
         name = name.split('#')[0];
-        const target = path.join('/tmp/hydro/judge', name.replace(/\//g, '_'));
+        const target = path.join(getConfig('tmp_dir'), name.replace(/\//g, '_'));
         await storage.get(`submission/${name}`, target);
         return target;
     },

packages/hydrojudge/src/hosts/hydro.ts

@@ -112,7 +112,7 @@ export default class Hydro {
     async fetchFile(name: string) {
         name = name.split('#')[0];
         const res = await this.post('judge/code', { id: name });
-        const target = path.join('/tmp/hydro/judge', name.replace(/\//g, '_'));
+        const target = path.join(getConfig('tmp_dir'), name.replace(/\//g, '_'));
         const w = fs.createWriteStream(target);
         this.get(res.body.url).pipe(w);
         await new Promise((resolve, reject) => {