Add plain text clipboard transfers and refine input feedback

apps/server/test/clipboard-access.test.js

@@ -0,0 +1,25 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { mayReadClipboardAutomatically } from '../../web/src/clipboardAccess.js';
+
+test('클립보드 자동 읽기는 모바일 확인과 지원하지 않는 권한 API를 우회하지 않는다', async () => {
+  assert.equal(await mayReadClipboardAutomatically({}, true), false);
+  const nav = (state) => ({ permissions: { query: async () => ({ state }) } });
+  assert.equal(await mayReadClipboardAutomatically(nav('granted'), true), true);
+  assert.equal(await mayReadClipboardAutomatically(nav('prompt'), true), false);
+  assert.equal(await mayReadClipboardAutomatically(nav('denied'), false), false);
+  assert.equal(await mayReadClipboardAutomatically(nav('prompt'), false), true);
+  assert.equal(
+    await mayReadClipboardAutomatically(
+      {
+        permissions: {
+          query: async () => {
+            throw new TypeError('unsupported');
+          },
+        },
+      },
+      false,
+    ),
+    false,
+  );
+});