Fix category rename to actually move notes between folders

- Changed handleRenameCategory to use moveNote instead of updateNote
- Fixed moveNoteWebDAV to create nested subdirectories for categories with slashes
- Now properly supports hierarchical category structures like 'Parent/Child'

src/App.tsx

@@ -236,16 +236,15 @@ function App() {
   };
 
   const handleRenameCategory = async (oldName: string, newName: string) => {
-    // Update all notes with the old category to the new category
-    const notesToUpdate = notes.filter(note => note.category === oldName);
+    // Move all notes from old category to new category
+    const notesToMove = notes.filter(note => note.category === oldName);
     
-    for (const note of notesToUpdate) {
+    for (const note of notesToMove) {
       try {
-        const updatedNote = { ...note, category: newName };
-        await syncManager.updateNote(updatedNote);
-        setNotes(prevNotes => prevNotes.map(n => n.id === note.id ? updatedNote : n));
+        const movedNote = await syncManager.moveNote(note, newName);
+        setNotes(prevNotes => prevNotes.map(n => n.id === note.id ? movedNote : n));
       } catch (error) {
-        console.error(`Failed to update note ${note.id}:`, error);
+        console.error(`Failed to move note ${note.id}:`, error);
       }
     }
 

src/api/nextcloud.ts

@@ -478,16 +478,22 @@ export class NextcloudAPI {
     const oldPath = `/remote.php/dav/files/${this.username}/Notes${oldCategoryPath}/${note.filename}`;
     const newPath = `/remote.php/dav/files/${this.username}/Notes${newCategoryPath}/${note.filename}`;
     
-    // Ensure new category directory exists
+    // Ensure new category directory exists (including nested subdirectories)
     if (newCategory) {
-      try {
-        const categoryUrl = `${this.serverURL}/remote.php/dav/files/${this.username}/Notes/${newCategory}`;
-        await tauriFetch(categoryUrl, {
-          method: 'MKCOL',
-          headers: { 'Authorization': this.authHeader },
-        });
-      } catch (e) {
-        // Directory might already exist
+      const parts = newCategory.split('/');
+      let currentPath = '';
+      
+      for (const part of parts) {
+        currentPath += (currentPath ? '/' : '') + part;
+        try {
+          const categoryUrl = `${this.serverURL}/remote.php/dav/files/${this.username}/Notes/${currentPath}`;
+          await tauriFetch(categoryUrl, {
+            method: 'MKCOL',
+            headers: { 'Authorization': this.authHeader },
+          });
+        } catch (e) {
+          // Directory might already exist, continue
+        }
       }
     }