chore(admin-ui): refine list-card table borders and rounding

tests/Feature/AdminComponentsCssListCardTableShouldHaveCleanBordersTest.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminComponentsCssListCardTableShouldHaveCleanBordersTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_admin_components_css_list_card_table_should_have_clean_borders(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $css = file_get_contents(public_path('css/admin-components.css'));
+        $this->assertIsString($css);
+
+        // List Card 表格应通过 overflow+separate 模式实现“边界干净”，避免最后一行多一条底线。
+        $this->assertStringContainsString('.list-card-body{', $css);
+        $this->assertStringContainsString('overflow:hidden', $css);
+
+        $this->assertStringContainsString('.list-card-table{', $css);
+        $this->assertStringContainsString('border-collapse:separate', $css);
+        $this->assertStringContainsString('border-spacing:0', $css);
+
+        $this->assertStringContainsString('.list-card-table tbody tr:last-child td{', $css);
+        $this->assertStringContainsString('border-bottom:none', $css);
+    }
+}