Icon improvements (#267, #345)

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

@@ -0,0 +1,46 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:aapt="http://schemas.android.com/aapt"
+    android:viewportWidth="142.129"
+    android:viewportHeight="142.129"
+    android:width="503.6066dp"
+    android:height="503.6066dp">
+    <group
+        android:translateX="-30.39437"
+        android:translateY="-54.68043">
+        <path
+            android:pathData="M109.8808 153.22596c-0.73146 -0.38777 -5.00657 -2.75679 -25.032416 -13.87149 -5.57273 -3.09297 -10.93823 -6.06723 -11.92332 -6.60948 -2.23728 -1.23152 -2.58105 -1.53456 -2.58105 -2.27528 0 -0.3879 0.89293 -2.87231 2.98561 -8.30689 1.64209 -4.2644 3.09426 -8.0014 3.22705 -8.30444 0.3024 -0.69008 0.78972 -1.27621 1.26573 -1.52236 0.44558 -0.23042 11.58052 -4.29685 12.14814 -4.43644 0.61355 -0.1509 1.1428 0.13977 1.45487 0.79901 0.14976 0.31638 0.77213 1.94934 1.38303 3.6288 0.6109 1.67945 1.52036 4.16275 2.02104 5.51844 1.14709 3.10604 1.18992 3.54589 0.3912 4.01771 -0.2117 0.12505 -1.58874 0.66539 -3.06009 1.20075 -1.47136 0.53536 -2.87533 1.08982 -3.11993 1.23213 -0.56422 0.32826 -0.64913 0.83523 -0.20815 1.24273 0.17523 0.16193 3.00434 1.77571 6.28691 3.58618 9.174936 5.06035 8.665596 4.83136 9.277626 4.17097 0.29987 -0.32356 5.78141 -14.266 6.09596 -15.50521 0.1344 -0.5295 0.11969 -0.60308 -0.16695 -0.83519 -0.39165 -0.31714 -0.335 -0.33071 -3.93797 0.9431 -3.56937 1.26192 -3.90926 1.28864 -4.38744 0.34488 -0.25108 -0.49556 -4.095796 -11.05481 -4.334456 -11.90432 -0.15438 -0.5495 0.0344 -1.0717 0.49701 -1.37482 0.19228 -0.12598 2.990116 -1.19935 6.217406 -2.38526 4.78924 -1.75986 6.0081 -2.15842 6.63117 -2.16837 0.8037 -0.0128 0.90917 0.0424 15.64514 8.19599 1.02104 0.56495 1.56579 1.15961 1.56579 1.70925 0 0.21814 -3.6538 9.91011 -8.11957 21.53771 -6.2982 16.39877 -8.19916 21.21114 -8.4744 21.45338 -0.46789 0.41179 -0.8512 0.39392 -1.74794 -0.0815z"
+            android:strokeWidth="0.139">
+            <aapt:attr
+                name="android:fillColor">
+                <gradient
+                    android:startX="76.74697"
+                    android:startY="113.4246"
+                    android:endX="110.6445"
+                    android:endY="152.5006"
+                    android:tileMode="clamp">
+                    <item
+                        android:color="#9B58DC"
+                        android:offset="0" />
+                    <item
+                        android:color="#321C92"
+                        android:offset="1" />
+                </gradient>
+            </aapt:attr>
+            <aapt:attr
+                name="android:strokeColor">
+                <gradient
+                    android:startX="76.74697"
+                    android:startY="113.4246"
+                    android:endX="110.6445"
+                    android:endY="152.5006"
+                    android:tileMode="clamp">
+                    <item
+                        android:color="#9B58DC"
+                        android:offset="0" />
+                    <item
+                        android:color="#321C92"
+                        android:offset="1" />
+                </gradient>
+            </aapt:attr>
+        </path>
+    </group>
+</vector>

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

@@ -0,0 +1,6 @@
+<?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 android:drawable="@drawable/ic_launcher_foreground"/>
+  <monochrome android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#1b1827</color>
+</resources>