Refactor UI styles for improved consistency and clarity

Unified card backgrounds, borders, and shadows across components for a more consistent look. Enhanced table, tab, and button styles for clarity and accessibility. Improved layout and modal structure in OneBot API debug, added modal for struct display, and optimized WebSocket debug connection logic. Updated file manager, logs, network, and terminal pages for visual consistency. Refactored interface definitions for stricter typing and readability.

packages/napcat-webui-frontend/src/pages/dashboard/file_manager.tsx

@@ -329,8 +329,8 @@ export default function FileManagerPage () {
   });
 
   return (
-    <div className='p-4'>
-      <div className='mb-4 flex items-center gap-4 sticky top-14 z-10 bg-content1 py-1'>
+    <div className='h-full flex flex-col relative gap-4 w-full p-4'>
+      <div className='mb-4 flex items-center gap-4 sticky top-14 z-10 bg-white/60 dark:bg-black/40 backdrop-blur-xl border border-white/40 dark:border-white/10 shadow-sm py-2 px-4 rounded-xl'>
         <Button
           color='primary'
           size='sm'
@@ -418,8 +418,8 @@ export default function FileManagerPage () {
                 )
               </Button>
             </>
-        )}
-        <Breadcrumbs className='flex-1 shadow-small px-2 py-2 rounded-lg'>
+          )}
+        <Breadcrumbs className='flex-1 bg-white/40 dark:bg-black/20 backdrop-blur-md shadow-sm border border-white/20 px-2 py-2 rounded-lg'>
           {currentPath.split('/').map((part, index, parts) => (
             <BreadcrumbItem
               key={part}