feat: 添加快捷提示词标签，点击即可追加到描述

ui.js

@@ -221,6 +221,22 @@ generateForm.addEventListener('submit', async (e) => {
   }
 });
 
+// ── Quick prompt tags ──────────────────────────────────────────
+
+document.querySelectorAll('.tag-pill').forEach(btn => {
+  btn.addEventListener('click', () => {
+    const tag = btn.dataset.tag;
+    const current = promptInput.value.trim();
+    if (current) {
+      promptInput.value = current + '，' + tag;
+    } else {
+      promptInput.value = tag;
+    }
+    promptInput.dispatchEvent(new Event('input'));
+    promptInput.focus();
+  });
+});
+
 // ── Prompt char count ──────────────────────────────────────────
 
 promptInput.addEventListener('input', () => {