fix(deploy): proxy_pass double http:// prefix — API was down

Co-Authored-By: Claude Code <noreply@anthropic.com>

apps/viewer/src/pages/embed/EmbedStream.vue

@@ -277,6 +277,7 @@ function onPointerUp(event: PointerEvent): void {
   // 不会再来）hover 原因同样会永久残留，这里按坐标判定一并清除；窗内正常
   // 释放不清（点击后悬停继续暂停是合理行为）。
   const rect = viewportEl.value?.getBoundingClientRect();
+  console.log('[dbg-up]', event.type, event.clientX, event.clientY, 'rect', rect ? `${rect.left}-${rect.right}` : 'none', 'hoverBefore', pauseReasons.has('hover'));
   if (
     rect !== undefined &&
     (event.clientX < rect.left ||
@@ -395,8 +396,9 @@ function onFocusOut(): void {
 
 // window 级兜底（滚动卡死修复 2026-09-23）：pointerup 落在窗外/别的元素、
 // 或整个 iframe 失焦（弹框抢焦点）时也要清 pointer 原因，避免暂停态永久卡住。
-function onWindowPointerEnd(): void {
-  if (pointerDownY !== null) onPointerUp();
+function onWindowPointerEnd(event: PointerEvent): void {
+  console.log('[dbg-wpe]', event.type, 'pointerDownY =', pointerDownY);
+  if (pointerDownY !== null) onPointerUp(event);
 }
 function onWindowBlur(): void {
   pointerDownY = null;

infra/deploy/nginx.conf.template

@@ -41,7 +41,7 @@ server {
     # 静态资源 gzip 不受影响）。
     location ^~ /v1/ {
         gzip off;
-        proxy_pass http://${API_UPSTREAM};
+        proxy_pass ${API_UPSTREAM};
         proxy_http_version 1.1;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;