feat: 筛选条件 Above 常驻横排 + 修正表格行紧凑（行高驱动源）

- 五个表格筛选改为 AboveContent 常驻显示，隐藏「筛选条件」标题、压缩为一行
- 修正行紧凑：行高由选择列/表头驱动（数据单元格默认 padding 为 0，此前加 padding 反而加高）

app/Filament/Resources/Comments/Tables/CommentsTable.php

@@ -65,7 +65,7 @@ class CommentsTable
                         'spam' => '垃圾',
                         'rejected' => '已拒绝',
                     ]),
-            ])
+            ], \Filament\Tables\Enums\FiltersLayout::AboveContent)
             ->recordActions([
                 Action::make('approve')
                     ->label('通过')

app/Filament/Resources/Media/Tables/MediaTable.php

@@ -56,7 +56,7 @@ class MediaTable
                         'attachments' => '附件',
                         'cover' => '封面',
                     ]),
-            ])
+            ], \Filament\Tables\Enums\FiltersLayout::AboveContent)
             ->recordActions([
                 \Filament\Actions\EditAction::make(),
             ])

app/Filament/Resources/Posts/Tables/PostsTable.php

@@ -78,7 +78,7 @@ class PostsTable
                     ]),
                 TernaryFilter::make('is_sticky')
                     ->label('置顶'),
-            ])
+            ], \Filament\Tables\Enums\FiltersLayout::AboveContent)
             ->filtersFormColumns(3)
             ->filtersFormWidth(\Filament\Support\Enums\Width::ThreeExtraLarge)
             ->recordActions([

app/Filament/Resources/Users/Tables/UsersTable.php

@@ -51,7 +51,7 @@ class UsersTable
                 \Filament\Tables\Filters\SelectFilter::make('roles')
                     ->label('角色')
                     ->relationship('roles', 'name'),
-            ])
+            ], \Filament\Tables\Enums\FiltersLayout::AboveContent)
             ->recordActions([
                 EditAction::make(),
             ])