Rebuild Noo as a full Nextcloud client: auth, media, and Material You UI

Replaces the starter template with Login Flow v2 auth, WebDAV-backed
Files/Photos/Activity tabs, a swipeable media viewer with PDF/text/video
preview, Material You dynamic theming, a frosted-glass floating nav bar,
and a rebranded app icon/identity (com.example -> family.nasa).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

android/app/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
 }
 
 android {
-    namespace = "com.example.nextcloud_client"
+    namespace = "family.nasa.nextcloud_client"
     compileSdk = flutter.compileSdkVersion
     ndkVersion = flutter.ndkVersion
 
@@ -15,8 +15,7 @@ android {
     }
 
     defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId = "com.example.nextcloud_client"
+        applicationId = "family.nasa.nextcloud_client"
         // 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

android/app/src/main/AndroidManifest.xml

@@ -1,8 +1,11 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.INTERNET"/>
     <application
-        android:label="nextcloud_client"
+        android:label="Noo"
         android:name="${applicationName}"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/ic_launcher"
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:usesCleartextTraffic="true">
         <activity
             android:name=".MainActivity"
             android:exported="true"
@@ -41,5 +44,16 @@
             <action android:name="android.intent.action.PROCESS_TEXT"/>
             <data android:mimeType="text/plain"/>
         </intent>
+        <!-- Needed so url_launcher can find a browser for Nextcloud Login Flow v2. -->
+        <intent>
+            <action android:name="android.intent.action.VIEW"/>
+            <category android:name="android.intent.category.BROWSABLE"/>
+            <data android:scheme="https"/>
+        </intent>
+        <!-- Needed so open_file can find apps to open downloaded files. -->
+        <intent>
+            <action android:name="android.intent.action.VIEW"/>
+            <data android:mimeType="*/*"/>
+        </intent>
     </queries>
 </manifest>

android/app/src/main/kotlin/family/nasa/nextcloud_client/MainActivity.kt

@@ -1,4 +1,4 @@
-package com.example.nextcloud_client
+package family.nasa.nextcloud_client
 
 import io.flutter.embedding.android.FlutterActivity
 

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

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+  <background android:drawable="@color/ic_launcher_background"/>
+  <foreground>
+      <inset
+          android:drawable="@drawable/ic_launcher_foreground"
+          android:inset="16%" />
+  </foreground>
+</adaptive-icon>

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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#3D5AD1</color>
+</resources>

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

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  This is a self-hosted Nextcloud client. Home-lab / self-hosted servers are
+  frequently reached over plain HTTP (LAN-only, behind a VPN, etc.), so we
+  allow cleartext traffic app-wide rather than assuming every server has TLS.
+-->
+<network-security-config>
+    <base-config cleartextTrafficPermitted="true">
+        <trust-anchors>
+            <certificates src="system"/>
+        </trust-anchors>
+    </base-config>
+</network-security-config>