diff --git a/app/android/app/build.gradle.kts b/app/android/app/build.gradle.kts
index e60d1ab..d3d6d57 100644
--- a/app/android/app/build.gradle.kts
+++ b/app/android/app/build.gradle.kts
@@ -1,9 +1,19 @@
+import java.util.Properties
+import java.io.FileInputStream
+
 plugins {
     id("com.android.application")
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id("dev.flutter.flutter-gradle-plugin")
 }
 
+// 从 key.properties 加载签名配置
+val keystorePropertiesFile = rootProject.file("key.properties")
+val keystoreProperties = Properties()
+if (keystorePropertiesFile.exists()) {
+    keystoreProperties.load(FileInputStream(keystorePropertiesFile))
+}
+
 android {
     namespace = "com.nuanji.nuanji_app"
     compileSdk = flutter.compileSdkVersion
@@ -15,21 +25,33 @@ android {
     }
 
     defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId = "com.nuanji.nuanji_app"
-        // You can update the following values to match your application needs.
-        // For more information, see: https://flutter.dev/to/review-gradle-config.
-        minSdk = flutter.minSdkVersion
+        minSdk = 24  // Android 7.0+ — 支持 Isar 原生库 + CameraX
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode
         versionName = flutter.versionName
     }
 
+    signingConfigs {
+        create("release") {
+            if (keystorePropertiesFile.exists()) {
+                keyAlias = keystoreProperties["keyAlias"] as String
+                keyPassword = keystoreProperties["keyPassword"] as String
+                storeFile = file(keystoreProperties["storeFile"] as String)
+                storePassword = keystoreProperties["storePassword"] as String
+            }
+        }
+    }
+
     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 = signingConfigs.getByName("release")
+            isMinifyEnabled = true
+            isShrinkResources = true
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
         }
     }
 }
diff --git a/app/android/app/proguard-rules.pro b/app/android/app/proguard-rules.pro
new file mode 100644
index 0000000..ac3bd76
--- /dev/null
+++ b/app/android/app/proguard-rules.pro
@@ -0,0 +1,38 @@
+# 暖记 ProGuard 规则
+# 保留 Flutter 引擎
+-keep class io.flutter.app.** { *; }
+-keep class io.flutter.plugin.**  { *; }
+-keep class io.flutter.util.**  { *; }
+-keep class io.flutter.view.**  { *; }
+-keep class io.flutter.**  { *; }
+-keep class io.flutter.plugins.**  { *; }
+
+# Isar 数据库 — 保留 native 调用
+-keep class com.isor.** { *; }
+-keep class isar.** { *; }
+-keepclassmembers class ** {
+    native <methods>;
+}
+
+# Dio 网络库
+-dontwarn okhttp3.**
+-dontwarn okio.**
+-keep class okhttp3.** { *; }
+-keep interface okhttp3.** { *; }
+
+# Gson / JSON 序列化
+-keepattributes Signature
+-keepattributes *Annotation*
+-keep class com.google.gson.** { *; }
+
+# freezed 生成的类 — 保留 JSON 序列化
+-keepclassmembers class **.models.** {
+    *** fromJson(...);
+    *** toJson();
+}
+
+# 保留所有序列化相关类
+-keepclassmembers class * {
+    *** INSTANCE;
+    *** Companion;
+}
diff --git a/app/android/app/src/main/AndroidManifest.xml b/app/android/app/src/main/AndroidManifest.xml
index 791abdc..6432866 100644
--- a/app/android/app/src/main/AndroidManifest.xml
+++ b/app/android/app/src/main/AndroidManifest.xml
@@ -1,9 +1,20 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- 网络权限 — API 同步、图片上传 -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
+    <!-- 相机权限 — 日记拍照 -->
+    <uses-permission android:name="android.permission.CAMERA"/>
+    <!-- 照片权限 — Android 13+ 细化媒体权限 -->
+    <uses-permission android:name="android.permission.READ_MEDIA_IMAGES"/>
+    <!-- 照片权限 — Android 12 及以下 -->
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" android:maxSdkVersion="32"/>
+
     <application
-        android:label="nuanji_app"
+        android:label="@string/app_name"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher"
-        android:networkSecurityConfig="@xml/network_security_config">
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:usesCleartextTraffic="false">
         <activity
             android:name=".MainActivity"
             android:exported="true"
diff --git a/app/android/app/src/main/res/drawable/launch_background.xml b/app/android/app/src/main/res/drawable/launch_background.xml
index 304732f..816e7eb 100644
--- a/app/android/app/src/main/res/drawable/launch_background.xml
+++ b/app/android/app/src/main/res/drawable/launch_background.xml
@@ -1,12 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Modify this file to customize your launch splash screen -->
+<!-- 暖记启动页 — 奶油白背景 + 居中 logo -->
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:drawable="@android:color/white" />
-
-    <!-- You can insert your own image assets here -->
-    <!-- <item>
+    <item android:drawable="@color/bg_light" />
+    <item>
         <bitmap
             android:gravity="center"
-            android:src="@mipmap/launch_image" />
-    </item> -->
+            android:src="@drawable/launch_logo" />
+    </item>
 </layer-list>
diff --git a/app/android/app/src/main/res/drawable/launch_background_dark.xml b/app/android/app/src/main/res/drawable/launch_background_dark.xml
new file mode 100644
index 0000000..e7e0f3d
--- /dev/null
+++ b/app/android/app/src/main/res/drawable/launch_background_dark.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 暖记启动页 (深色模式) — 深色背景 + 居中 logo -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@color/bg_dark" />
+    <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@drawable/launch_logo" />
+    </item>
+</layer-list>
diff --git a/app/android/app/src/main/res/drawable/launch_logo.png b/app/android/app/src/main/res/drawable/launch_logo.png
new file mode 100644
index 0000000..e91b019
Binary files /dev/null and b/app/android/app/src/main/res/drawable/launch_logo.png differ
diff --git a/app/android/app/src/main/res/mipmap-hdpi/ic_launcher.png b/app/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
index db77bb4..85068aa 100644
Binary files a/app/android/app/src/main/res/mipmap-hdpi/ic_launcher.png and b/app/android/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/app/android/app/src/main/res/mipmap-mdpi/ic_launcher.png b/app/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
index 17987b7..b33c117 100644
Binary files a/app/android/app/src/main/res/mipmap-mdpi/ic_launcher.png and b/app/android/app/src/main/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/app/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/app/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
index 09d4391..2c0edfa 100644
Binary files a/app/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png and b/app/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/app/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/app/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
index d5f1c8d..799ec04 100644
Binary files a/app/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png and b/app/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/app/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/app/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
index 4d6372e..f11fb2f 100644
Binary files a/app/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png and b/app/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/app/android/app/src/main/res/values-night/colors.xml b/app/android/app/src/main/res/values-night/colors.xml
new file mode 100644
index 0000000..beb5395
--- /dev/null
+++ b/app/android/app/src/main/res/values-night/colors.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="launch_bg">#1A1614</color>
+</resources>
diff --git a/app/android/app/src/main/res/values-night/styles.xml b/app/android/app/src/main/res/values-night/styles.xml
index 06952be..ba9470a 100644
--- a/app/android/app/src/main/res/values-night/styles.xml
+++ b/app/android/app/src/main/res/values-night/styles.xml
@@ -1,17 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <!-- 深色模式启动主题 — 深色背景 -->
     <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
-        <!-- Show a splash screen on the activity. Automatically removed when
-             the Flutter engine draws its first frame -->
-        <item name="android:windowBackground">@drawable/launch_background</item>
+        <item name="android:windowBackground">@drawable/launch_background_dark</item>
+        <item name="android:statusBarColor">@color/bg_dark</item>
     </style>
-    <!-- Theme applied to the Android Window as soon as the process has started.
-         This theme determines the color of the Android Window while your
-         Flutter UI initializes, as well as behind your Flutter UI while its
-         running.
-
-         This Theme is only used starting with V2 of Flutter's Android embedding. -->
     <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
diff --git a/app/android/app/src/main/res/values-zh/strings.xml b/app/android/app/src/main/res/values-zh/strings.xml
new file mode 100644
index 0000000..57719bb
--- /dev/null
+++ b/app/android/app/src/main/res/values-zh/strings.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">暖记</string>
+</resources>
diff --git a/app/android/app/src/main/res/values/colors.xml b/app/android/app/src/main/res/values/colors.xml
new file mode 100644
index 0000000..ef034bd
--- /dev/null
+++ b/app/android/app/src/main/res/values/colors.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- 暖记设计系统颜色 -->
+    <color name="bg_light">#FFF8F0</color>   <!-- 奶油白背景 -->
+    <color name="bg_dark">#1A1614</color>     <!-- 深色背景 -->
+    <color name="accent">#E07A5F</color>      <!-- 珊瑚色主色 -->
+    <color name="fg_light">#2D2420</color>    <!-- 浅色模式文字 -->
+    <color name="fg_dark">#F0E8DF</color>     <!-- 深色模式文字 -->
+</resources>
diff --git a/app/android/app/src/main/res/values/strings.xml b/app/android/app/src/main/res/values/strings.xml
new file mode 100644
index 0000000..57719bb
--- /dev/null
+++ b/app/android/app/src/main/res/values/strings.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">暖记</string>
+</resources>
diff --git a/app/android/app/src/main/res/values/styles.xml b/app/android/app/src/main/res/values/styles.xml
index cb1ef88..fcc461a 100644
--- a/app/android/app/src/main/res/values/styles.xml
+++ b/app/android/app/src/main/res/values/styles.xml
@@ -1,17 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <!-- 浅色模式启动主题 — 奶油白背景 -->
     <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
-        <!-- Show a splash screen on the activity. Automatically removed when
-             the Flutter engine draws its first frame -->
         <item name="android:windowBackground">@drawable/launch_background</item>
+        <item name="android:statusBarColor">@color/bg_light</item>
     </style>
-    <!-- Theme applied to the Android Window as soon as the process has started.
-         This theme determines the color of the Android Window while your
-         Flutter UI initializes, as well as behind your Flutter UI while its
-         running.
-
-         This Theme is only used starting with V2 of Flutter's Android embedding. -->
     <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
diff --git a/app/android/build.gradle.kts b/app/android/build.gradle.kts
index dbee657..2147f68 100644
--- a/app/android/build.gradle.kts
+++ b/app/android/build.gradle.kts
@@ -1,5 +1,8 @@
 allprojects {
     repositories {
+        // 阿里云 Maven 镜像 — 加速中国大陆依赖下载
+        maven { url = uri("https://maven.aliyun.com/repository/google") }
+        maven { url = uri("https://maven.aliyun.com/repository/central") }
         google()
         mavenCentral()
     }
@@ -15,6 +18,28 @@ subprojects {
     val newSubprojectBuildDir: Directory = newBuildDir.dir(project.name)
     project.layout.buildDirectory.value(newSubprojectBuildDir)
 }
+
+subprojects {
+    // 为缺少 namespace 的旧 Flutter 插件自动注入 namespace
+    // 解决 AGP 9.x 要求必须指定 namespace 的问题
+    plugins.withId("com.android.library") {
+        val android = project.extensions.getByName("android")
+        if (android is com.android.build.gradle.LibraryExtension && android.namespace == null) {
+            val manifestFile = project.file("src/main/AndroidManifest.xml")
+            if (manifestFile.exists()) {
+                val packageName = manifestFile.readLines()
+                    .firstOrNull { it.contains("package=") }
+                    ?.let { line ->
+                        Regex("package=\"([^\"]+)\"").find(line)?.groupValues?.get(1)
+                    }
+                if (packageName != null) {
+                    android.namespace = packageName
+                }
+            }
+        }
+    }
+}
+
 subprojects {
     project.evaluationDependsOn(":app")
 }
diff --git a/app/android/gradle.properties b/app/android/gradle.properties
index e96108c..2f4b32d 100644
--- a/app/android/gradle.properties
+++ b/app/android/gradle.properties
@@ -4,3 +4,8 @@ android.useAndroidX=true
 android.newDsl=false
 # This builtInKotlin flag was added by the Flutter template
 android.builtInKotlin=false
+# 构建性能优化
+org.gradle.parallel=true
+org.gradle.caching=true
+# 暂不启用 configuration-cache（与 init 脚本冲突）
+# org.gradle.configuration-cache=true
diff --git a/app/android/settings.gradle.kts b/app/android/settings.gradle.kts
index c21f0c5..2788107 100644
--- a/app/android/settings.gradle.kts
+++ b/app/android/settings.gradle.kts
@@ -11,6 +11,10 @@ pluginManagement {
     includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
 
     repositories {
+        // 阿里云 Maven 镜像 — 加速中国大陆依赖下载
+        maven { url = uri("https://maven.aliyun.com/repository/google") }
+        maven { url = uri("https://maven.aliyun.com/repository/central") }
+        maven { url = uri("https://maven.aliyun.com/repository/gradle-plugin") }
         google()
         mavenCentral()
         gradlePluginPortal()