diff --git a/apps/admin/src/components/core/views/login/LoginLeftView.vue b/apps/admin/src/components/core/views/login/LoginLeftView.vue
index fd5d7af..171b7c8 100644
--- a/apps/admin/src/components/core/views/login/LoginLeftView.vue
+++ b/apps/admin/src/components/core/views/login/LoginLeftView.vue
@@ -49,7 +49,7 @@
       width: 100%;
       height: 100%;
       object-fit: cover;
-      opacity: 0.4;
+      // opacity: 0.4;
       pointer-events: none;
     }
 
diff --git a/apps/mobile/android/app/build.gradle.kts b/apps/mobile/android/app/build.gradle.kts
index 793a619..3957a6c 100644
--- a/apps/mobile/android/app/build.gradle.kts
+++ b/apps/mobile/android/app/build.gradle.kts
@@ -1,3 +1,4 @@
+import java.util.Properties
 plugins {
     id("com.android.application")
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
@@ -25,11 +26,26 @@ android {
         versionName = flutter.versionName
     }
 
+    // 正式签名（key.properties + photo-live-release.jks，均不入库）：
+    // 缺失时回退 debug 签名（CI/他人克隆仓库仍可构建）。
+    val keystoreProps = Properties().apply {
+        val f = rootProject.file("app/key.properties")
+        if (f.exists()) f.inputStream().use { load(it) }
+    }
+
     buildTypes {
         release {
-            // TODO: Add your own signing config for the release build.
-            // Signing with the debug keys for now, so `flutter run --release` works.
-            signingConfig = signingConfigs.getByName("debug")
+            signingConfig = if (keystoreProps.getProperty("storeFile") != null) {
+                signingConfigs.create("release") {
+                    storeFile = rootProject.file("app/" + keystoreProps.getProperty("storeFile"))
+                    storePassword = keystoreProps.getProperty("storePassword")
+                    keyAlias = keystoreProps.getProperty("keyAlias")
+                    keyPassword = keystoreProps.getProperty("keyPassword")
+                }
+            } else {
+                // Signing with the debug keys（无正式签名配置的构建机回退）。
+                signingConfigs.getByName("debug")
+            }
             // R8 混淆会破坏 WorkManager 反射初始化（NoSuchMethodException
             // WorkDatabase_Impl），ProGuard keep 规则见 proguard-rules.pro。
             isMinifyEnabled = true
diff --git a/apps/viewer/e2e/verify-mfix2.mjs b/apps/viewer/e2e/verify-mfix2.mjs
new file mode 100644
index 0000000..d2c1c39
--- /dev/null
+++ b/apps/viewer/e2e/verify-mfix2.mjs
@@ -0,0 +1,48 @@
+import { createServer } from 'node:http';
+import { chromium } from '@playwright/test';
+const server = createServer((_q, res) => {
+  res.setHeader('content-type', 'text/html; charset=utf-8');
+  res.end(`<!doctype html><html><body style="min-height:900px">
+  <script src="http://219.157.255.213:32006/embed/v2/loader.js" data-slot="se1bt8mqvmeese4jx9gixnj4" defer></script></body></html>`);
+});
+await new Promise((r) => server.listen(3980, '127.0.0.1', r));
+const browser = await chromium.launch();
+const page = await browser.newPage({ viewport: { width: 1440, height: 900 } });
+await page.goto('http://127.0.0.1:3980');
+const frame = page.locator('iframe[src*="/embed/"][src*="v=2"]');
+await frame.waitFor({ timeout: 20000 });
+await page.waitForTimeout(3000);
+const f = page.frames().find((fr) => fr.url().includes('v=2'));
+const offset = async () => {
+  const t = await f.locator('.stream-track').evaluate((el) => el.style.transform);
+  return Number.parseFloat((/translateY\((-?[\d.]+)px\)/.exec(t) ?? ['0', '0'])[1]);
+};
+const box = await frame.boundingBox();
+const cx = (box ? box.x : 0) + 90, cy = (box ? box.y : 0) + 150;
+const scrolling = async (ms = 1000) => { const a = await offset(); await page.waitForTimeout(ms); return a !== (await offset()); };
+
+console.log('1. baseline =', await scrolling());
+
+// 窗内拖动后，鼠标移开再验证（窗内 up 后鼠标停在窗内属正常 hover 暂停）
+await page.mouse.move(cx, cy); await page.mouse.down();
+await page.mouse.move(cx, cy + 40, { steps: 4 }); await page.mouse.up();
+await page.mouse.move(30, 30); await page.waitForTimeout(1500);
+console.log('2. after in-frame drag (pointer away) =', await scrolling());
+
+// 窗外释放
+await page.mouse.move(cx, cy); await page.mouse.down();
+await page.mouse.move(cx + 120, cy + 200, { steps: 4 }); await page.mouse.up();
+await page.waitForTimeout(3500);
+console.log('3. after outside-release =', await scrolling());
+
+// 长跑 20s
+const s1 = await offset(); await page.waitForTimeout(20000); const s2 = await offset();
+console.log('4. 20s moved =', Math.abs(s2 - s1).toFixed(0), 'px');
+
+// hover 语义仍正常
+await page.mouse.move(cx, cy); await page.waitForTimeout(800);
+const h1 = await offset(); await page.waitForTimeout(800); const h2 = await offset();
+await page.mouse.move(30, 30); await page.waitForTimeout(1500);
+const h3 = await offset(); await page.waitForTimeout(800); const h4 = await offset();
+console.log('5. hover pause =', h1 === h2, '; leave resume =', h3 !== h4);
+server.close(); await browser.close();