feat: add active pack image downloads

src/app/api/packs/download/route.ts

@@ -0,0 +1,144 @@
+import { NextResponse } from 'next/server';
+import { PACK_ORDER } from '@/lib/templates';
+import { loadSession, readImageUrl } from '@/lib/storage';
+import type { PackKind, ToyAsset } from '@/lib/types';
+
+export const runtime = 'nodejs';
+export const dynamic = 'force-dynamic';
+
+const CRC_TABLE = new Uint32Array(256).map((_, index) => {
+  let value = index;
+  for (let bit = 0; bit < 8; bit += 1) {
+    value = value & 1 ? 0xedb88320 ^ (value >>> 1) : value >>> 1;
+  }
+  return value >>> 0;
+});
+
+function crc32(buffer: Buffer) {
+  let crc = 0xffffffff;
+  for (const byte of buffer) {
+    crc = CRC_TABLE[(crc ^ byte) & 0xff] ^ (crc >>> 8);
+  }
+  return (crc ^ 0xffffffff) >>> 0;
+}
+
+function safeName(input: string) {
+  return input
+    .trim()
+    .replace(/[\\/:*?"<>|]+/g, '-')
+    .replace(/\s+/g, '_')
+    .replace(/^-+|-+$/g, '')
+    .slice(0, 80) || 'asset';
+}
+
+function extFromAsset(asset: ToyAsset, sourceFilename: string, mimeType: string) {
+  const fromName = sourceFilename.match(/\.([a-z0-9]+)$/i)?.[1];
+  if (fromName) return fromName.toLowerCase() === 'jpeg' ? 'jpg' : fromName.toLowerCase();
+  if (mimeType.includes('jpeg')) return 'jpg';
+  if (mimeType.includes('webp')) return 'webp';
+  if (mimeType.includes('svg')) return 'svg';
+  return asset.url.match(/\.([a-z0-9]+)(?:\?|$)/i)?.[1] ?? 'png';
+}
+
+function makeZip(files: Array<{ name: string; data: Buffer }>) {
+  const localParts: Buffer[] = [];
+  const centralParts: Buffer[] = [];
+  let offset = 0;
+  const dosTime = 0;
+  const dosDate = 33;
+
+  for (const file of files) {
+    const name = Buffer.from(file.name, 'utf8');
+    const data = file.data;
+    const crc = crc32(data);
+
+    const local = Buffer.alloc(30);
+    local.writeUInt32LE(0x04034b50, 0);
+    local.writeUInt16LE(20, 4);
+    local.writeUInt16LE(0x0800, 6);
+    local.writeUInt16LE(0, 8);
+    local.writeUInt16LE(dosTime, 10);
+    local.writeUInt16LE(dosDate, 12);
+    local.writeUInt32LE(crc, 14);
+    local.writeUInt32LE(data.length, 18);
+    local.writeUInt32LE(data.length, 22);
+    local.writeUInt16LE(name.length, 26);
+    local.writeUInt16LE(0, 28);
+    localParts.push(local, name, data);
+
+    const central = Buffer.alloc(46);
+    central.writeUInt32LE(0x02014b50, 0);
+    central.writeUInt16LE(20, 4);
+    central.writeUInt16LE(20, 6);
+    central.writeUInt16LE(0x0800, 8);
+    central.writeUInt16LE(0, 10);
+    central.writeUInt16LE(dosTime, 12);
+    central.writeUInt16LE(dosDate, 14);
+    central.writeUInt32LE(crc, 16);
+    central.writeUInt32LE(data.length, 20);
+    central.writeUInt32LE(data.length, 24);
+    central.writeUInt16LE(name.length, 28);
+    central.writeUInt16LE(0, 30);
+    central.writeUInt16LE(0, 32);
+    central.writeUInt16LE(0, 34);
+    central.writeUInt16LE(0, 36);
+    central.writeUInt32LE(0, 38);
+    central.writeUInt32LE(offset, 42);
+    centralParts.push(central, name);
+
+    offset += local.length + name.length + data.length;
+  }
+
+  const centralSize = centralParts.reduce((sum, part) => sum + part.length, 0);
+  const end = Buffer.alloc(22);
+  end.writeUInt32LE(0x06054b50, 0);
+  end.writeUInt16LE(0, 4);
+  end.writeUInt16LE(0, 6);
+  end.writeUInt16LE(files.length, 8);
+  end.writeUInt16LE(files.length, 10);
+  end.writeUInt32LE(centralSize, 12);
+  end.writeUInt32LE(offset, 16);
+  end.writeUInt16LE(0, 20);
+
+  return Buffer.concat([...localParts, ...centralParts, end]);
+}
+
+export async function GET(req: Request) {
+  const url = new URL(req.url);
+  const sessionId = url.searchParams.get('sessionId')?.trim();
+  const kind = url.searchParams.get('kind')?.trim() as PackKind | null;
+
+  if (!sessionId || !kind || !PACK_ORDER.includes(kind)) {
+    return NextResponse.json({ error: 'bad request' }, { status: 400 });
+  }
+
+  const session = await loadSession(sessionId);
+  if (!session) return NextResponse.json({ error: 'session not found' }, { status: 404 });
+
+  const selectedImage = session.images.find(image => image.status === 'selected') ?? session.images[0];
+  const pack = session.packs?.find(item => item.kind === kind && (!selectedImage || item.sourceImageId === selectedImage.id))
+    ?? session.packs?.find(item => item.kind === kind);
+
+  if (!pack?.assets.length) {
+    return NextResponse.json({ error: 'pack has no images' }, { status: 404 });
+  }
+
+  const files = await Promise.all(pack.assets.map(async (asset, index) => {
+    const image = await readImageUrl(asset.url);
+    const ext = extFromAsset(asset, image.filename, image.type);
+    const fileName = `${String(index + 1).padStart(2, '0')}_${safeName(asset.templateId)}.${ext}`;
+    return { name: fileName, data: image.buf };
+  }));
+
+  const zip = makeZip(files);
+  const filename = `${safeName(session.characterSpec?.name ?? session.prompt ?? session.id)}_${kind}_${pack.assets.length}张.zip`;
+
+  return new Response(zip, {
+    headers: {
+      'Content-Type': 'application/zip',
+      'Content-Length': String(zip.length),
+      'Content-Disposition': `attachment; filename*=UTF-8''${encodeURIComponent(filename)}`,
+      'Cache-Control': 'no-store',
+    },
+  });
+}

src/app/globals.css

@@ -961,6 +961,32 @@ input, textarea {
   display: none;
 }
 
+.gallery-download-button {
+  display: flex;
+  width: 100%;
+  min-height: 38px;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 2px;
+  border-radius: 8px;
+  background: rgba(255, 255, 255, 0.07);
+  color: rgba(255, 255, 255, 0.72);
+  font-size: 9px;
+  font-weight: 700;
+  line-height: 1;
+  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.10);
+  transition: background 160ms ease, color 160ms ease, box-shadow 160ms ease;
+}
+
+.gallery-download-button:hover,
+.gallery-download-button:focus-visible {
+  outline: none;
+  background: rgba(230, 245, 120, 0.14);
+  color: #e6f578;
+  box-shadow: inset 0 0 0 1px rgba(230, 245, 120, 0.32);
+}
+
 .gallery-rail-thumb {
   box-shadow: 0 12px 32px -22px rgba(230, 245, 120, 0.65);
 }

src/app/page.tsx

@@ -16,7 +16,6 @@ import type {
   LockCharacterResponse,
   PackKind,
   ProjectFromUploadResponse,
-  RegenerateAssetResponse,
   UploadImageResponse,
   UploadedImageRole,
   VideoGenerationResponse,
@@ -138,11 +137,7 @@ function ProjectPackOverview({
           const progress = Math.round((count / total) * 100);
 
           function handleGenerate() {
-            if (locked || running) return;
+            if (locked || running || pack) return;
-            if (pack) {
-              const ok = window.confirm(`${PACK_LABELS[kind]} 已有 ${count} 张图，重新生成会再次调用图片模型并产生费用。确认继续？`);
-              if (!ok) return;
-            }
             onGeneratePack(sourceImage, kind);
           }
 
@@ -165,14 +160,16 @@ function ProjectPackOverview({
                 <span className={`project-pack-status ${complete ? 'project-pack-status--done' : locked ? 'project-pack-status--locked' : 'project-pack-status--ready'}`}>
                   {complete ? '完成' : locked ? '锁定' : '可生成'}
                 </span>
-                <button
+                {!pack && (
-                  onClick={handleGenerate}
+                  <button
-                  disabled={running || locked}
+                    onClick={handleGenerate}
-                  className="project-pack-action"
+                    disabled={running || locked}
-                  title={locked ? '先完成前置步骤' : pack ? '重新生成该包' : '生成该包'}
+                    className="project-pack-action"
-                >
+                    title={locked ? '先完成前置步骤' : '生成该包'}
-                  {running ? '...' : pack ? '重做' : '生成'}
+                  >
-                </button>
+                    {running ? '...' : '生成'}
+                  </button>
+                )}
                 <button
                   type="button"
                   className="project-pack-jump"
@@ -500,22 +497,6 @@ export default function Home() {
     }
   }
 
-  async function handleRegenerateAsset(assetId: string, userRefinement?: string) {
-    if (!current) return;
-    const r = await fetch(`/api/assets/${encodeURIComponent(assetId)}/regenerate`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ sessionId: current.id, userRefinement, confirmCost: true }),
-    });
-    if (!r.ok) {
-      alert('单张重做失败：' + (await r.text()));
-      return;
-    }
-    const d: RegenerateAssetResponse = await r.json();
-    setProvider(d.provider);
-    await reloadCurrent(current.id);
-  }
-
   function resolveVideoAnchor(image: GenImage) {
     const packs = current?.packs ?? [];
     const mktFront = packs.find(pack => pack.kind === 'marketing')?.assets.find(asset => asset.templateId === 'mkt_white_front');
@@ -649,7 +630,6 @@ export default function Home() {
                       activeNav={activeAssetPanel}
                       onActiveNavChange={setActiveAssetPanel}
                       videoLoading={videoLoading}
-                      onRegenerateAsset={handleRegenerateAsset}
                       onGenerateVideo={handleGenerateVideo}
                     />
                   </section>

src/components/PackPanel.tsx

@@ -93,14 +93,11 @@ function AssetTile({ template, asset, onOpen }: {
   );
 }
 
-function AssetDetailDrawer({ detail, onClose, onRegenerate }: {
+function AssetDetailDrawer({ detail, onClose }: {
   detail: AssetDetail | null;
   onClose: () => void;
-  onRegenerate: (assetId: string, userRefinement?: string) => Promise<void>;
 }) {
   const [mounted, setMounted] = useState(false);
-  const [refinement, setRefinement] = useState('');
-  const [regenerating, setRegenerating] = useState(false);
 
   useEffect(() => {
     setMounted(true);
@@ -108,7 +105,6 @@ function AssetDetailDrawer({ detail, onClose, onRegenerate }: {
 
   useEffect(() => {
     if (!detail) return;
-    setRefinement('');
     function handleKey(event: KeyboardEvent) {
       if (event.key === 'Escape') onClose();
     }
@@ -116,21 +112,6 @@ function AssetDetailDrawer({ detail, onClose, onRegenerate }: {
     return () => window.removeEventListener('keydown', handleKey);
   }, [detail, onClose]);
 
-  async function handleRedo() {
-    const asset = detail?.asset;
-    if (!asset || !onRegenerate || regenerating) return;
-    const ok = window.confirm('重新生成这 1 张会再次调用图片模型并产生费用。确认继续？');
-    if (!ok) return;
-    setRegenerating(true);
-    try {
-      await onRegenerate(asset.id, refinement);
-      setRefinement('');
-      onClose();
-    } finally {
-      setRegenerating(false);
-    }
-  }
-
   if (!mounted) return null;
 
   const template = detail?.template;
@@ -206,28 +187,6 @@ function AssetDetailDrawer({ detail, onClose, onRegenerate }: {
                   </div>
                 </div>
               )}
-
-              {ready && (
-                <div className="asset-detail-block">
-                  <div className="asset-detail-label">单张重做</div>
-                  <div className="flex gap-2">
-                    <input
-                      value={refinement}
-                      onChange={event => setRefinement(event.target.value)}
-                      placeholder="补充重做要求"
-                      className="min-w-0 flex-1 rounded-[8px] bg-black/30 px-3 py-2 text-[12px] text-white/82 outline-none ring-1 ring-white/[0.09] focus:ring-[#e6f578]/40"
-                    />
-                    <button
-                      type="button"
-                      onClick={handleRedo}
-                      disabled={regenerating}
-                      className="rounded-[8px] bg-[#d6b36a]/18 px-4 py-2 text-[12px] font-semibold text-[#f2d38c] ring-1 ring-[#d6b36a]/24 transition-colors hover:bg-[#d6b36a]/26 disabled:opacity-40"
-                    >
-                      {regenerating ? '...' : '确认'}
-                    </button>
-                  </div>
-                </div>
-              )}
             </div>
           </>
         )}
@@ -248,13 +207,12 @@ function DetailItem({ label, value }: { label: string; value: string | number })
 }
 
 /* ── Pack Section ─────────────────────────────── */
-function PackSection({ kind, pack, locked, lockReason, stepIndex, onRegenerateAsset }: {
+function PackSection({ kind, pack, locked, lockReason, stepIndex }: {
   kind: PackKind;
   pack: AssetPack | undefined;
   locked: boolean;
   lockReason?: string;
   stepIndex: number;
-  onRegenerateAsset: (assetId: string, userRefinement?: string) => Promise<void>;
 }) {
   const [detail, setDetail] = useState<AssetDetail | null>(null);
   const accent = PACK_ACCENT[kind];
@@ -301,7 +259,7 @@ function PackSection({ kind, pack, locked, lockReason, stepIndex, onRegenerateAs
           })}
         </div>
       </div>
-      <AssetDetailDrawer detail={detail} onClose={() => setDetail(null)} onRegenerate={onRegenerateAsset} />
+      <AssetDetailDrawer detail={detail} onClose={() => setDetail(null)} />
     </section>
   );
 }
@@ -516,14 +474,12 @@ export default function PackPanel({
   activeNav,
   onActiveNavChange,
   videoLoading,
-  onRegenerateAsset,
   onGenerateVideo,
 }: {
   session: GenSession;
   activeNav: string;
   onActiveNavChange: (id: string) => void;
   videoLoading: boolean;
-  onRegenerateAsset: (assetId: string, userRefinement?: string) => Promise<void>;
   onGenerateVideo: (image: GenImage, template: typeof VIDEO_TEMPLATES[number]) => void;
 }) {
   const selectedImages = session.images.filter(image => image.status === 'selected');
@@ -564,7 +520,7 @@ export default function PackPanel({
             <span className="section-eyebrow">Asset Details</span>
             <h2 className="mt-1 text-sm font-semibold text-white">生成明细</h2>
           </div>
-          <span className="shrink-0 text-[10px] text-white/35">查看与单张重做</span>
+          <span className="shrink-0 text-[10px] text-white/35">查看明细</span>
         </div>
         <SectionNav active={activeNav} onChange={onActiveNavChange} />
       </section>
@@ -579,7 +535,6 @@ export default function PackPanel({
               locked={locked}
               lockReason={lockReason}
               stepIndex={index + 1}
-              onRegenerateAsset={onRegenerateAsset}
             />
           );
         })() : (

src/components/ProjectGalleryDrawer.tsx

@@ -23,6 +23,7 @@ type GalleryItem = {
 
 type GalleryPanel = {
   mode: 'pack' | 'empty' | 'project';
+  kind?: PackKind;
   label: string;
   description: string;
   total: number;
@@ -64,6 +65,7 @@ function galleryForPanel(session: GenSession, activeNav: string): GalleryPanel {
     })) ?? [];
     return {
       mode: 'pack' as const,
+      kind,
       label: PACK_LABELS[kind],
       description: `${PACK_LABELS[kind]}当前区块图片`,
       total: PACK_TEMPLATES[kind].length,
@@ -99,6 +101,9 @@ export default function ProjectGalleryDrawer({ session, activeNav, onAction }: P
   const [mounted, setMounted] = useState(false);
   const [preview, setPreview] = useState<GalleryItem | null>(null);
   const gallery = galleryForPanel(session, activeNav);
+  const downloadHref = gallery.kind && gallery.images.length
+    ? `/api/packs/download?sessionId=${encodeURIComponent(session.id)}&kind=${encodeURIComponent(gallery.kind)}`
+    : null;
 
   useEffect(() => {
     setMounted(true);
@@ -191,6 +196,22 @@ export default function ProjectGalleryDrawer({ session, activeNav, onAction }: P
           <span className="mt-0.5 text-[9px] font-semibold">图库</span>
         </button>
 
+        {downloadHref && (
+          <a
+            href={downloadHref}
+            className="gallery-download-button"
+            title={`打包下载${gallery.label}图片`}
+            aria-label={`打包下载${gallery.label}图片`}
+          >
+            <svg width="17" height="17" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.4" aria-hidden="true">
+              <path d="M12 4v10" strokeLinecap="round" />
+              <path d="m8 10 4 4 4-4" strokeLinecap="round" strokeLinejoin="round" />
+              <path d="M5 19h14" strokeLinecap="round" />
+            </svg>
+            <span>下载</span>
+          </a>
+        )}
+
         <div className="w-full rounded-[8px] bg-black/22 px-1.5 py-2 text-center text-[10px] text-white/42">
           <b className="block text-[13px] text-[#e6f578]">{gallery.images.length}</b>
           <span>/ {gallery.total}</span>