fix: remove 10 unused variables in File Manager and config files

Cleaned up more unused imports, parameters, and variables:
- FileManagerGrid.tsx: removed 4 unused variables (params, function)
- FileManagerContextMenu.tsx: removed Share import
- FileManagerSidebar.tsx: removed onLoadDirectory parameter
- DraggableWindow.tsx: removed Square import
- FileWindow.tsx: removed updateWindow variable
- ServerConfig.tsx: removed 2 unused error parameters

Reduced lint errors from 236 to 222 (14 errors fixed total)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/ui/Desktop/Apps/File Manager/components/DraggableWindow.tsx

@@ -1,6 +1,6 @@
 import React, { useState, useRef, useCallback, useEffect } from "react";
 import { cn } from "@/lib/utils";
-import { Minus, Square, X, Maximize2, Minimize2 } from "lucide-react";
+import { Minus, X, Maximize2, Minimize2 } from "lucide-react";
 import { useTranslation } from "react-i18next";
 
 interface DraggableWindowProps {

src/ui/Desktop/Apps/File Manager/components/FileWindow.tsx

@@ -56,7 +56,7 @@ export function FileWindow({
   initialY = 100,
   onFileNotFound,
 }: FileWindowProps) {
-  const { closeWindow, maximizeWindow, focusWindow, updateWindow, windows } =
+  const { closeWindow, maximizeWindow, focusWindow, windows } =
     useWindowManager();
 
   const { t } = useTranslation();