add automated screenshots, fastlane metadata, and appstream metainfo

Fixes #174, fixes #173, fixes #172

README.md

@@ -8,7 +8,7 @@ A simple and user-friendly Matrix client made with Flutter and a Gomuks backend.
 
 |                                                                                   Dark Mode                                                                                   |                                    Light Mode                                     |
 | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :-------------------------------------------------------------------------------: |
-| ![Screenshot of Nexus Client in dark mode, showing users talking, with a sidebar showing rooms and spaces, and another sidebar showing members](./assets/screenshotDark.avif) | ![The same screenshot as above, but in light mode](./assets/screenshotLight.avif) |
+| ![Screenshot of Nexus Client in dark mode, showing users talking, with a sidebar showing rooms and spaces, and another sidebar showing members](./assets/screenshots/desktop-dark.png) | ![The same screenshot as above, but in light mode](./assets/screenshots/desktop-light.png) |
 
 ## Try it out
 

fastlane/metadata/android/en-US/full_description.txt

@@ -0,0 +1,10 @@
+<p>Nexus is a simple and user-friendly client for Matrix, the open and decentralized chat network. It's made with Flutter, with gomuks handling the Matrix side.</p>
+
+<p>Features include:</p>
+<ul>
+<li>Spaces, threads, replies and reactions</li>
+<li>End-to-end encryption, with verification and recovery keys</li>
+<li>Polls, location sharing, and custom emoji and sticker packs</li>
+<li>Multiple accounts</li>
+<li>Notifications through UnifiedPush, or Firebase Cloud Messaging</li>
+</ul>

fastlane/metadata/android/en-US/short_description.txt

@@ -0,0 +1 @@
+A simple and user-friendly Matrix client

fastlane/metadata/android/en-US/title.txt

@@ -0,0 +1 @@
+Nexus

integration_test/helpers/pump_until.dart

@@ -10,9 +10,23 @@ extension PumpUntil on WidgetTester {
   Future<void> pumpUntil(Finder finder) async {
     const timeout = Duration(seconds: 30);
 
-    String textsIn(Finder finder) => widgetList<Text>(
-      find.descendant(of: finder, matching: find.byType(Text)),
-    ).map((text) => text.data).nonNulls.join("\n");
+    String textsIn(Finder finder) =>
+        widgetList(
+              find.descendant(
+                of: finder,
+                matching: find.byWidgetPredicate(
+                  (widget) => widget is Text || widget is SelectableText,
+                ),
+              ),
+            )
+            .map(
+              (widget) => switch (widget) {
+                Text(:final data) || SelectableText(:final data) => data,
+                _ => null,
+              },
+            )
+            .nonNulls
+            .join("\n");
 
     final stopwatch = Stopwatch()..start();
     while (stopwatch.elapsed < timeout) {

integration_test/screenshots/avatars/SOURCES.md

@@ -0,0 +1,22 @@
+# Screenshot avatars
+
+Avatars for the people, rooms and spaces in the screenshots, cropped from photos on Wikimedia Commons and Public Domain Pictures that are in the public domain or CC0, so they need no attribution.
+
+| File                   | License       | Source                                                                                                   |
+| ---------------------- | ------------- | -------------------------------------------------------------------------------------------------------- |
+| pumpkin.webp           | Public domain | https://commons.wikimedia.org/wiki/File:Cucurbita_2011_G1.jpg                                            |
+| orange.webp            | Public domain | https://commons.wikimedia.org/wiki/File:Orange-fruit-2.jpg                                               |
+| log-1.webp             | CC0           | https://commons.wikimedia.org/wiki/File:Tabby_cat_with_blue_eyes-3336579.jpg (tinted green)              |
+| strudel.webp           | CC0           | https://commons.wikimedia.org/wiki/File:Strudel-de-maca-2.png                                            |
+| opal.webp              | Public domain | https://commons.wikimedia.org/wiki/File:Opal_6.jpg                                                       |
+| cinnamon.webp          | CC0           | https://commons.wikimedia.org/wiki/File:Cassia_bark_(2).jpg                                              |
+| green-tea.webp         | CC0           | https://www.publicdomainpictures.net/en/view-image.php?image=165622&picture=hot-green-tea-with-heart-art |
+| development.webp       | CC0           | https://commons.wikimedia.org/wiki/File:Code_on_computer_monitor_(Unsplash).jpg                          |
+| fediverse.webp         | Public domain | https://commons.wikimedia.org/wiki/File:Blackeyegalaxy.jpg                                               |
+| flutter-devs.webp      | CC0           | https://commons.wikimedia.org/wiki/File:Anna%27s_Hummingbird_Feeding.jpg                                 |
+| linux-mobile.webp      | CC0           | https://commons.wikimedia.org/wiki/File:Gentoo_penguin_with_a_feather_in_its_beak.jpg                    |
+| matrix-community.webp  | Public domain | https://commons.wikimedia.org/wiki/File:Earth_at_Night,_Asia_(8270740728).jpg                            |
+| off-topic.webp         | CC0           | https://commons.wikimedia.org/wiki/File:Coffee_cup_surrounded_by_coffee_beans.jpg                        |
+| open-source-games.webp | Public domain | https://commons.wikimedia.org/wiki/File:LodgeNet-Nintendo-N64-Controller.jpg                             |
+| rust.webp              | CC0           | https://commons.wikimedia.org/wiki/File:Carcinus_maenas_146434844.jpg                                    |
+| self-hosting.webp      | CC0           | https://commons.wikimedia.org/wiki/File:Legrand_S.A._server_rack.jpg                                     |