Implement actual file system renaming functionality with updated documentation

PROJECT_OVERVIEW.md

@@ -40,7 +40,7 @@ MovieMapper is a desktop application designed for organizing and managing movie
   - Air dates
 
 ### 3. File Management
-- **File Renaming**: Click on file names to rename them directly in the interface
+- **File Renaming**: Click on file names to rename them directly in the interface (changes persist to actual file system)
 - **File Tagging**: Mark files as extras or with commentary tags
 - **File Untagging**: Click on already tagged files to remove the tag
 - **File Organization**: Move files to "extras" folder for better organization

renderer.js

@@ -174,6 +174,11 @@ function makeEditable(element) {
           console.log('File renamed successfully:', result.message);
           // Update the file name in the UI to reflect the change
           element.textContent = element.textContent.trim();
+          
+          // Also update the data attribute to reflect the new path
+          const oldPath = element.dataset.filePath;
+          const newPath = oldPath.substring(0, oldPath.lastIndexOf(path.sep) + 1) + element.textContent.trim();
+          element.dataset.filePath = newPath;
         } else {
           console.error('Failed to rename file:', result.error);
           // Revert to original name on failure