feat: 后台内容区 full-width（maxContentWidth=Full）+ 侧边栏容器左右留白 12px 避免贴边

app/Providers/AppServiceProvider.php

@@ -35,7 +35,8 @@ class AppServiceProvider extends ServiceProvider
                 PanelsRenderHook::STYLES_AFTER,
                 fn () => Blade::render(<<<'HTML'
 <style>
-    .fi-sidebar-nav { padding-inline: 0.4rem; }
+    .fi-sidebar { padding-inline: 0.75rem; }
+    .fi-sidebar-nav { padding-inline: 0; }
     .fi-sidebar-nav .fi-sidebar-item-button { padding-inline: 0.6rem; border-radius: 0.5rem; }
     .fi-sidebar-nav .fi-sidebar-item-label { font-size: 0.82rem; }
     .fi-sidebar-nav .fi-sidebar-group-label { font-size: 0.68rem; letter-spacing: 0.04em; }

app/Providers/Filament/AdminPanelProvider.php

@@ -43,6 +43,7 @@ class AdminPanelProvider extends PanelProvider
             ])
             ->brandName(config('blog.name'))
             ->sidebarWidth('13rem')
+            ->maxContentWidth(\Filament\Support\Enums\Width::Full)
             ->navigationGroups([
                 NavigationGroup::make('内容'),
                 NavigationGroup::make('管理'),