fix pack switch upgrade handle

varManager_backend/src/api/mod.rs

@@ -1893,6 +1893,7 @@ pub async fn list_packswitch(
 
     let addon_path = crate::infra::paths::addon_packages_dir(&vampath);
     let link_root = addon_path.join(crate::infra::paths::INSTALL_LINK_DIR);
+    let switch_root = crate::infra::paths::addon_switch_root(&vampath);
     let current = if let Ok(target) = crate::infra::winfs::read_link_target(&link_root) {
         let resolved = if target.is_absolute() {
             target
@@ -1902,7 +1903,6 @@ pub async fn list_packswitch(
                 .unwrap_or(&addon_path)
                 .join(target)
         };
-        let switch_root = crate::infra::paths::addon_switch_root(&vampath);
         if resolved.starts_with(&switch_root) {
             resolved
                 .parent()
@@ -1913,6 +1913,24 @@ pub async fn list_packswitch(
         } else {
             "default".to_string()
         }
+    } else if let Ok(target) = crate::infra::winfs::read_link_target(&addon_path) {
+        let resolved = if target.is_absolute() {
+            target
+        } else {
+            addon_path
+                .parent()
+                .unwrap_or(&addon_path)
+                .join(target)
+        };
+        if resolved.starts_with(&switch_root) {
+            resolved
+                .file_name()
+                .and_then(|s| s.to_str())
+                .unwrap_or("default")
+                .to_string()
+        } else {
+            "default".to_string()
+        }
     } else {
         "default".to_string()
     };

varManager_backend/src/jobs/packswitch.rs

@@ -212,10 +212,10 @@ fn set_switch_blocking(
     fs::create_dir_all(&target).map_err(|err| err.to_string())?;
 
     let addon_path = addon_packages_dir(&vampath);
-    fs::create_dir_all(&addon_path).map_err(|err| err.to_string())?;
+    let addon_was_symlink = ensure_addonpackages_dir(&addon_path, reporter)?;
 
     let managed_dirs = collect_managed_dirs();
-    if managed_dirs_have_real_vars(&addon_path, &managed_dirs) {
+    if !addon_was_symlink && managed_dirs_have_real_vars(&addon_path, &managed_dirs) {
         reporter.log(format!(
             "Managed link folders contain real var files; update DB required: {}",
             addon_path.display()
@@ -252,6 +252,28 @@ fn collect_managed_dirs() -> BTreeSet<String> {
     dirs
 }
 
+fn ensure_addonpackages_dir(addon_path: &Path, reporter: &JobReporter) -> Result<bool, String> {
+    if fs_util::is_symlink(addon_path) {
+        reporter.log(format!(
+            "AddonPackages is a symlink; migrating to folder-based packswitch: {}",
+            addon_path.display()
+        ));
+        if fs::remove_file(addon_path).is_err() {
+            fs::remove_dir_all(addon_path).map_err(|err| err.to_string())?;
+        }
+        fs::create_dir_all(addon_path).map_err(|err| err.to_string())?;
+        return Ok(true);
+    }
+    if addon_path.exists() && !addon_path.is_dir() {
+        return Err(format!(
+            "AddonPackages is not a directory: {}",
+            addon_path.display()
+        ));
+    }
+    fs::create_dir_all(addon_path).map_err(|err| err.to_string())?;
+    Ok(false)
+}
+
 fn managed_dirs_have_real_vars(addon_path: &Path, managed_dirs: &BTreeSet<String>) -> bool {
     for dir_name in managed_dirs {
         let path = addon_path.join(dir_name);
@@ -601,4 +623,26 @@ mod tests {
 
         let _ = fs::remove_dir_all(&root);
     }
+
+    #[test]
+    fn migrate_addonpackages_symlink_to_directory() {
+        if !symlink_supported() {
+            return;
+        }
+        let root = make_temp_dir("packswitch_migrate_symlink");
+        let addon_path = root.join("AddonPackages");
+        let target = root.join("legacy_target");
+        fs::create_dir_all(&target).unwrap();
+        winfs::create_symlink_dir(&addon_path, &target).unwrap();
+
+        let (tx, _rx) = create_job_channel();
+        let reporter = JobReporter::new(1, tx);
+        let was_symlink = ensure_addonpackages_dir(&addon_path, &reporter).unwrap();
+
+        assert!(was_symlink);
+        assert!(addon_path.exists());
+        assert!(!fs_util::is_symlink(&addon_path));
+
+        let _ = fs::remove_dir_all(&root);
+    }
 }

varmanager_flutter/lib/features/home/home_page.dart

@@ -731,6 +731,7 @@ class _HomePageState extends ConsumerState<HomePage> {
                         final result = await _runJob('update_db');
                         ref.invalidate(varsListProvider);
                         await _showUpdateDbSummary(result);
+                        await _loadPackSwitches();
                       },
                 icon: const Icon(Icons.sync),
                 label: Text(l10n.updateDbLabel),