fix(SmartFsProviderNode): Fix Node provider watch path handling and remove main test entry

ts/providers/smartfs.provider.node.ts

@@ -266,6 +266,10 @@ export class SmartFsProviderNode implements ISmartFsProvider {
   // --- Watch Operations ---
 
   public async watch(path: string, callback: TWatchCallback, options?: IWatchOptions): Promise<IWatcherHandle> {
+    // Check once at start if we're watching a file or directory
+    const watchedStats = await fs.stat(path);
+    const isWatchingFile = watchedStats.isFile();
+
     const watcher = fsSync.watch(
       path,
       {
@@ -274,7 +278,8 @@ export class SmartFsProviderNode implements ISmartFsProvider {
       async (eventType, filename) => {
         if (!filename) return;
 
-        const fullPath = pathModule.join(path, filename);
+        // For file watching, path IS the file; for directory, join with filename
+        const fullPath = isWatchingFile ? path : pathModule.join(path, filename);
 
         // Apply filter
         if (options?.filter && !this.matchesPathFilter(fullPath, options.filter)) {