feat: Add clickable file paths in AI chat responses

- Detect file paths with dots in directory names (e.g. next/styles/SignIn.module.css)
- Create new files when path ends with "(new file)"
- Use existing socket connection and file management system

frontend/components/editor/index.tsx

@@ -1288,6 +1288,7 @@ export default function CodeEditor({
                   handleApplyCode={handleApplyCode}
                   mergeDecorationsCollection={mergeDecorationsCollection}
                   setMergeDecorationsCollection={setMergeDecorationsCollection}
+                  selectFile={selectFile}
                 />
               </ResizablePanel>
             </>