增加复制功能

frontend/src/views/PlaygroundView.vue

@@ -272,6 +272,32 @@ async function copyPrompt(item) {
   flash(await copyText(text) ? '指令已复制' : '复制失败')
 }
 
+async function copyImage(url) {
+  try {
+    const blob = await (await fetch(url)).blob()
+    const pngBlob = blob.type === 'image/png'
+      ? blob
+      : await new Promise((resolve, reject) => {
+          createImageBitmap(blob).then((bitmap) => {
+            const canvas = document.createElement('canvas')
+            canvas.width = bitmap.width
+            canvas.height = bitmap.height
+            const ctx = canvas.getContext('2d')
+            if (!ctx) { reject(new Error('no canvas ctx')); return }
+            ctx.drawImage(bitmap, 0, 0)
+            canvas.toBlob((out) => {
+              if (out) resolve(out)
+              else reject(new Error('png convert failed'))
+            }, 'image/png')
+          }).catch(reject)
+        })
+    await navigator.clipboard.write([new ClipboardItem({ 'image/png': pngBlob })])
+    flash('图片已复制')
+  } catch {
+    flash('复制失败')
+  }
+}
+
 // ---- generate (concurrent — no lock) ----
 // 生图 can request 1–4 images at once: each is an independent task/charge.
 const count = ref(1)
@@ -686,6 +712,10 @@ onUnmounted(() => {
             <!-- hover action: 上参考图. Image → use as reference; video → 末帧设为首帧
                  (only shown when the model supports 首尾帧). Clicking the media zooms. -->
             <div class="absolute top-2 right-2 flex gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
+              <button v-if="item.kind !== 'video'" @click.stop.prevent="copyImage(item.url + '.thumb.jpg')" title="复制缩略图"
+                      class="w-7 h-7 rounded-lg bg-black/50 ring-1 ring-white/10 hover:bg-black/70 text-white grid place-items-center">
+                <Icon name="copy" class="w-3.5 h-3.5" />
+              </button>
               <a :href="item.url" :download="(item.url || '').split('/').pop()" @click.stop title="下载"
                  class="w-7 h-7 rounded-lg bg-black/50 ring-1 ring-white/10 hover:bg-black/70 text-white grid place-items-center">
                 <Icon name="download" class="w-3.5 h-3.5" />