fix: an edge case where auto import does not work with relative model file path

extensions/model-extension/src/index.ts

@@ -4,6 +4,7 @@ import {
   InferenceEngine,
   joinPath,
   dirName,
+  fs,
   ModelManager,
   abortDownload,
   DownloadState,
@@ -181,7 +182,8 @@ export default class JanModelExtension extends ModelExtension {
         toImportModels.map(async (model: Model & { file_path: string }) =>
           this.importModel(
             model.id,
-            model.sources[0].url.startsWith('http')
+            model.sources[0].url.startsWith('http') ||
+              !(await fs.existsSync(model.sources[0].url))
               ? await joinPath([
                   await dirName(model.file_path),
                   model.sources[0]?.filename ??