refactor: update file mention format to use backticked relative paths instead of markdown links

Author: milisp

src/components/common/FileMentionPopover.tsx

@@ -53,7 +53,7 @@ export function FileMentionPopover({
         normalizedCwd && normalizedPath.startsWith(`${normalizedCwd}/`)
           ? normalizedPath.slice(normalizedCwd.length + 1)
           : normalizedPath;
-      const link = `[${file.name}](${relativePath})`;
+      const link = `\`${relativePath}\``;
       const newValue = replaceAtTrigger(input, '@', link);
       if (newValue !== null) applyEditorReplacement(newValue, setInput, editorRef);
       else editorRef.current?.focus();

src/components/features/files/explorer/FileTreeNode.tsx

@@ -73,7 +73,7 @@ export function FileTreeNode({
   const handleInsert = (e: React.MouseEvent) => {
     e.preventDefault();
     e.stopPropagation();
-    appendInputValue(`[${node.name}](${relativePath})`);
+    appendInputValue(`\`${relativePath}\``);
   };
 
   return (