diff --git a/apps/mobile/lib/pages/share_qr_dialog.dart b/apps/mobile/lib/pages/share_qr_dialog.dart
index 2ace2a6..6d4ca60 100644
--- a/apps/mobile/lib/pages/share_qr_dialog.dart
+++ b/apps/mobile/lib/pages/share_qr_dialog.dart
@@ -448,8 +448,11 @@ class _PosterSheetState extends ConsumerState<_PosterSheet> {
                       Padding(
                         padding: const EdgeInsets.all(kSpace24),
                         child: Column(
+                          // 标题/时间/地址居左（Column 默认 center 会吞掉
+                          // Text 的 textAlign——对齐由这里统一决定）。
+                          crossAxisAlignment: CrossAxisAlignment.start,
                           children: [
-                            // 活动标题（居左；二维码保持居中）。
+                            // 活动标题（居左）。
                             Text(
                               title,
                               textAlign: TextAlign.left,
@@ -509,18 +512,22 @@ class _PosterSheetState extends ConsumerState<_PosterSheet> {
                               ),
                             ],
                             const SizedBox(height: kSpace24),
-                            // 二维码（白底保持扫码对比度）。
-                            QrImageView(
-                              data: url,
-                              version: QrVersions.auto,
-                              size: 200,
-                              backgroundColor: Colors.white,
+                            // 二维码 + 说明：保持居中（文字区居左的例外）。
+                            Center(
+                              child: QrImageView(
+                                data: url,
+                                version: QrVersions.auto,
+                                size: 200,
+                                backgroundColor: Colors.white,
+                              ),
                             ),
                             const SizedBox(height: kSpace12),
-                            Text(
-                              l10n.shareScanHint,
-                              style: theme.textTheme.bodySmall?.copyWith(
-                                color: const Color(0xFF69778E),
+                            Center(
+                              child: Text(
+                                l10n.shareScanHint,
+                                style: theme.textTheme.bodySmall?.copyWith(
+                                  color: const Color(0xFF69778E),
+                                ),
                               ),
                             ),
                           ],
diff --git a/apps/viewer/e2e/embed-v2.spec.ts b/apps/viewer/e2e/embed-v2.spec.ts
index 0cc4b0a..89fa126 100644
--- a/apps/viewer/e2e/embed-v2.spec.ts
+++ b/apps/viewer/e2e/embed-v2.spec.ts
@@ -370,9 +370,7 @@ test.describe.serial('E04 interactions: pause, click lock, keyboard, destroy', (
     await frame.waitFor();
     const inside = page.frameLocator('iframe[src*="/embed/"][src*="v=2"]');
     await page.waitForTimeout(1200);
-    // 聚焦流区域（点击视口非链接处不触发照片点击——顶部渐隐带命中视口）。
-    const box = await frame.boundingBox();
-    await page.mouse.click((box!.x ?? 0) + 90, (box!.y ?? 0) + 6);
+    // 聚焦流区域（程序化聚焦，不点击——照片点击现会打开宿主详情弹框）。
     await inside.locator('.stream-viewport').focus();
     await page.keyboard.press(' ');
     await page.waitForTimeout(300);
diff --git a/docs/designs/ui04-implementation/actual/server/photo-modal.png b/docs/designs/ui04-implementation/actual/server/photo-modal.png
index 7f25a9a..530eea6 100644
Binary files a/docs/designs/ui04-implementation/actual/server/photo-modal.png and b/docs/designs/ui04-implementation/actual/server/photo-modal.png differ
diff --git a/docs/designs/ui04-implementation/recordings/e03-scroll-32s.webm b/docs/designs/ui04-implementation/recordings/e03-scroll-32s.webm
index 2da61b0..586bc53 100644
Binary files a/docs/designs/ui04-implementation/recordings/e03-scroll-32s.webm and b/docs/designs/ui04-implementation/recordings/e03-scroll-32s.webm differ