feat(js): 复制链接按钮提供短暂已复制反馈(自动恢复)

tests/Feature/AdminJsCopyLinkButtonsShouldHaveTemporaryFeedbackLogicTest.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminJsCopyLinkButtonsShouldHaveTemporaryFeedbackLogicTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_admin_js_should_include_temporary_feedback_for_copy_link_buttons(): void
+    {
+        $js = file_get_contents(public_path('js/admin.js'));
+
+        $this->assertIsString($js);
+
+        // 关键口径：复制后按钮短暂变为“已复制/复制失败”，并 disable
+        $this->assertStringContainsString('markCopied', $js);
+        $this->assertStringContainsString("'已复制'", $js);
+        $this->assertStringContainsString("'复制失败'", $js);
+        $this->assertStringContainsString('btn.disabled = true', $js);
+    }
+}