INFRA: Set Up Project.

android/app/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <!-- Permissions -->
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
+
+
+    <!-- Camera Feature (optional) -->
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="false" />
+
+    <!-- Bluetooth Feature -->
+    <uses-feature
+        android:name="android.hardware.bluetooth"
+        android:required="true" />
+
+    <!-- Queries -->
+    <queries>
+        <intent>
+            <action android:name="android.media.action.IMAGE_CAPTURE" />
+        </intent>
+        <intent>
+            <action android:name="android.intent.action.VIEW" />
+            <data android:scheme="mailto" />
+        </intent>
+        <!-- For Flutter's text processing -->
+        <intent>
+            <action android:name="android.intent.action.PROCESS_TEXT" />
+            <data android:mimeType="text/plain" />
+        </intent>
+    </queries>
+
+    <application
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher"
+        android:label="customer"
+        android:requestLegacyExternalStorage="true"
+        android:roundIcon="@mipmap/ic_launcher"
+        android:usesCleartextTraffic="true">
+
+        <!-- Main Activity (Kotlin-based) -->
+        <activity
+            android:name="com.emart.customer.MainActivity"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:enableOnBackInvokedCallback="true"
+            android:exported="true"
+            android:hardwareAccelerated="true"
+            android:launchMode="singleTop"
+            android:theme="@style/LaunchTheme"
+            android:windowSoftInputMode="adjustResize">
+
+            <meta-data
+                android:name="io.flutter.embedding.android.NormalTheme"
+                android:resource="@style/NormalTheme" />
+
+            <meta-data
+                android:name="io.flutter.embedding.android.SplashScreenDrawable"
+                android:resource="@drawable/launch_background" />
+
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+            <!-- Notification click -->
+            <intent-filter>
+                <action android:name="FLUTTER_NOTIFICATION_CLICK" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+
+            <!-- PayPal success redirect -->
+            <intent-filter android:label="paypalpay">
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data
+                    android:host="paypalpay"
+                    android:scheme="com.emart.customer" />
+            </intent-filter>
+
+            <!-- PayPal cancel redirect -->
+            <intent-filter android:label="paypalcancel">
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data
+                    android:host="paypalcancel"
+                    android:scheme="com.emart.customer" />
+
+            </intent-filter>
+
+            <!-- Existing Flutter intent filters (KEEP these) -->
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <!-- Firebase Notification Icons -->
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_icon"
+            android:resource="@mipmap/ic_launcher" />
+
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_channel_id"
+            android:value="high_importance_channel" />
+
+        <!-- Flutter embedding -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+
+        <!-- Google Maps API Key -->
+        <meta-data
+            android:name="com.google.android.geo.API_KEY"
+            android:value="YOUR_API_KEY_HERE" />
+
+        <!-- ML Kit Barcode -->
+        <meta-data
+            android:name="com.google.mlkit.vision.DEPENDENCIES"
+            android:value="barcode" />
+
+        <!-- Razorpay -->
+        <activity
+            android:name="com.razorpay.CheckoutActivity"
+            android:exported="false"
+            tools:replace="android:exported" />
+
+        <receiver
+            android:name="com.razorpay.RzpTokenReceiver"
+            android:exported="false"
+            tools:replace="android:exported">
+            <intent-filter>
+                <action android:name="rzp.device_token.share" />
+            </intent-filter>
+        </receiver>
+
+        <!-- Local Notifications Service -->
+        <service
+            android:name="com.dexterous.flutterlocalnotifications.ForegroundService"
+            android:exported="false"
+            android:stopWithTask="false" />
+
+        <!-- File Provider -->
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.provider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/provider_paths" />
+        </provider>
+
+    </application>
+</manifest>

android/app/src/main/kotlin/com/emart/customer/MainActivity.kt

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+package com.emart.customer
+
+import io.flutter.embedding.android.FlutterFragmentActivity
+
+class MainActivity : FlutterFragmentActivity() {
+}

android/app/src/main/res/drawable-v21/launch_background.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

android/app/src/main/res/drawable/launch_background.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<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>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+  <background android:drawable="@mipmap/ic_launcher_background"/>
+  <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+  <monochrome android:drawable="@mipmap/ic_launcher_monochrome"/>
+</adaptive-icon>

android/app/src/main/res/values-night/styles.xml

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+<?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 -->
+    <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>
+    </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>
+</resources>

android/app/src/main/res/values/styles.xml

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+<resources>
+    <!-- Theme for launch/splash screen -->
+    <style name="LaunchTheme" parent="Theme.MaterialComponents.Light.NoActionBar">
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+
+    <!-- Normal app theme -->
+    <style name="NormalTheme" parent="Theme.MaterialComponents.Light.NoActionBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

android/app/src/main/res/xml/provider_paths.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <external-path name="external_files" path="."/>
+</paths>