feat(native): TREK's own app icon and launch screen, named just TREK

The shells still carried Capacitor's placeholder icon and splash, the blue
X on a grid. They now show the white TREK mark on a dark, slightly glassy
tile: a soft light from the top left and a sheen over the upper half, in
the app's launch colour #09090b. Android 12+ draws its launch screen on the
same colour instead of light grey.

scripts/generate-app-icons.mjs renders the sources into assets/ from
public/icons/icon-white.svg, and `npm run icons:app` turns them into every
size both platforms ask for through @capacitor/assets. The Android
foreground mark is sized for the adaptive icon's round mask.

The home screen label is TREK: the old "TREK - Plan your trips!" was cut
off under the icon, and the longer title belongs to the store listings.

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

@@ -1,5 +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"/>
+    <background>
-    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+        <inset android:drawable="@mipmap/ic_launcher_background" android:inset="16.7%" />
+    </background>
+    <foreground>
+        <inset android:drawable="@mipmap/ic_launcher_foreground" android:inset="16.7%" />
+    </foreground>
 </adaptive-icon>

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

@@ -1,5 +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"/>
+    <background>
-    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+        <inset android:drawable="@mipmap/ic_launcher_background" android:inset="16.7%" />
+    </background>
+    <foreground>
+        <inset android:drawable="@mipmap/ic_launcher_foreground" android:inset="16.7%" />
+    </foreground>
 </adaptive-icon>

client/android/app/src/main/res/values/ic_launcher_background.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="ic_launcher_background">#FFFFFF</color>
+    <color name="ic_launcher_background">#09090B</color>
-</resources>
+    <color name="launch_background">#09090B</color>
+</resources>

client/android/app/src/main/res/values/strings.xml

@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='utf-8'?>
 <resources>
-    <string name="app_name">TREK - Plan your trips!</string>
+    <string name="app_name">TREK</string>
-    <string name="title_activity_main">TREK - Plan your trips!</string>
+    <string name="title_activity_main">TREK</string>
     <string name="package_name">com.liketrek.trek</string>
     <string name="custom_url_scheme">com.liketrek.trek</string>
 </resources>

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

@@ -18,5 +18,8 @@
 
     <style name="AppTheme.NoActionBarLaunch" parent="Theme.SplashScreen">
         <item name="android:background">@drawable/splash</item>
+        <!-- Android 12+ draws its own launch screen: the app icon on this colour.
+             The same near-black as the icon tile and the first painted frame. -->
+        <item name="windowSplashScreenBackground">@color/launch_background</item>
     </style>
 </resources>

client/capacitor.config.ts

@@ -5,7 +5,9 @@ import { KeyboardResize } from '@capacitor/keyboard';
 
 const config: CapacitorConfig = {
   appId: 'com.liketrek.trek',
-  appName: 'TREK - Plan your trips!',
+  // What the home screen shows under the icon; the longer title belongs to
+  // the store listings.
+  appName: 'TREK',
   // The app ships only the address screen. Once a server is picked, the native
   // side points the WebView at it (TrekBridgeViewController.swift,
   // MainActivity.java) and the UI comes from that server, always in the version

client/ios/App/App/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,14 +1,14 @@
 {
-  "images" : [
+  "images": [
     {
-      "filename" : "AppIcon-512@2x.png",
+      "idiom": "universal",
-      "idiom" : "universal",
+      "size": "1024x1024",
-      "platform" : "ios",
+      "filename": "AppIcon-512@2x.png",
-      "size" : "1024x1024"
+      "platform": "ios"
     }
   ],
-  "info" : {
+  "info": {
-    "author" : "xcode",
+    "author": "xcode",
-    "version" : 1
+    "version": 1
   }
-}
+}

client/ios/App/App/Assets.xcassets/Splash.imageset/Contents.json

@@ -1,23 +1,56 @@
 {
-  "images" : [
+  "images": [
     {
-      "idiom" : "universal",
+      "idiom": "universal",
-      "filename" : "splash-2732x2732-2.png",
+      "filename": "Default@1x~universal~anyany.png",
-      "scale" : "1x"
+      "scale": "1x"
     },
     {
-      "idiom" : "universal",
+      "idiom": "universal",
-      "filename" : "splash-2732x2732-1.png",
+      "filename": "Default@2x~universal~anyany.png",
-      "scale" : "2x"
+      "scale": "2x"
     },
     {
-      "idiom" : "universal",
+      "idiom": "universal",
-      "filename" : "splash-2732x2732.png",
+      "filename": "Default@3x~universal~anyany.png",
-      "scale" : "3x"
+      "scale": "3x"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "idiom": "universal",
+      "scale": "1x",
+      "filename": "Default@1x~universal~anyany-dark.png"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "idiom": "universal",
+      "scale": "2x",
+      "filename": "Default@2x~universal~anyany-dark.png"
+    },
+    {
+      "appearances": [
+        {
+          "appearance": "luminosity",
+          "value": "dark"
+        }
+      ],
+      "idiom": "universal",
+      "scale": "3x",
+      "filename": "Default@3x~universal~anyany-dark.png"
     }
   ],
-  "info" : {
+  "info": {
-    "version" : 1,
+    "version": 1,
-    "author" : "xcode"
+    "author": "xcode"
   }
 }

client/ios/App/App/Info.plist

@@ -7,7 +7,7 @@
 	<key>CFBundleDevelopmentRegion</key>
 	<string>en</string>
 	<key>CFBundleDisplayName</key>
-        <string>TREK - Plan your trips!</string>
+	<string>TREK</string>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>

client/package.json

@@ -7,6 +7,7 @@
     "dev": "vite",
     "prebuild": "node scripts/patch-maplibre.mjs && node scripts/generate-icons.mjs",
     "icons:native": "node scripts/generate-native-icons.mjs",
+    "icons:app": "node scripts/generate-app-icons.mjs && npx @capacitor/assets generate --android --ios --iconBackgroundColor #09090b --iconBackgroundColorDark #09090b --splashBackgroundColor #09090b --splashBackgroundColorDark #09090b",
     "build:native": "vite build --config vite.native.config.js",
     "cap:sync": "npm run build:native && cap sync",
     "build": "vite build",

client/scripts/generate-app-icons.mjs

@@ -0,0 +1,104 @@
+/**
+ * Renders the native apps' icon and splash sources into assets/, from the
+ * white TREK mark in public/icons/icon-white.svg. `npx @capacitor/assets
+ * generate --android --ios` then turns them into every size both platforms
+ * ask for (see the icons:app script).
+ *
+ * The look: a dark, slightly glassy tile (a soft light from the top left and a
+ * sheen over the upper half) under the white mark. Dark because that is the
+ * app's launch background (#09090b) and its default scheme.
+ *
+ * Android's adaptive icon masks the foreground to a circle inside the
+ * canvas, so the mark there sits smaller than on the iOS tile.
+ */
+import { mkdirSync, readFileSync } from 'fs'
+import { dirname, join } from 'path'
+import { fileURLToPath } from 'url'
+import sharp from 'sharp'
+
+const clientDir = join(dirname(fileURLToPath(import.meta.url)), '..')
+const outDir = join(clientDir, 'assets')
+mkdirSync(outDir, { recursive: true })
+
+const source = readFileSync(join(clientDir, 'public', 'icons', 'icon-white.svg'), 'utf8')
+const markPath = [...source.matchAll(/<path d="([^"]+)"/g)].map((m) => m[1]).find((d) => d.length > 500)
+if (!markPath) throw new Error('No mark path found in icon-white.svg')
+// The mark's extent inside its 1500 x 1500 viewBox.
+const MARK = { x: 40, y: 5, w: 1420, h: 1490 }
+
+const LAUNCH_BG = '#09090b'
+
+function tile(size) {
+  return `<svg xmlns="http://www.w3.org/2000/svg" width="${size}" height="${size}" viewBox="0 0 1024 1024">
+  <defs>
+    <linearGradient id="base" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#2a2a31"/>
+      <stop offset="0.55" stop-color="#141418"/>
+      <stop offset="1" stop-color="#08080a"/>
+    </linearGradient>
+    <radialGradient id="light" cx="0.22" cy="0.12" r="0.75">
+      <stop offset="0" stop-color="#ffffff" stop-opacity="0.20"/>
+      <stop offset="0.45" stop-color="#ffffff" stop-opacity="0.05"/>
+      <stop offset="1" stop-color="#ffffff" stop-opacity="0"/>
+    </radialGradient>
+    <linearGradient id="sheen" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0" stop-color="#ffffff" stop-opacity="0.10"/>
+      <stop offset="0.48" stop-color="#ffffff" stop-opacity="0.03"/>
+      <stop offset="0.5" stop-color="#ffffff" stop-opacity="0"/>
+    </linearGradient>
+    <radialGradient id="depth" cx="0.8" cy="0.95" r="0.7">
+      <stop offset="0" stop-color="#000000" stop-opacity="0.35"/>
+      <stop offset="1" stop-color="#000000" stop-opacity="0"/>
+    </radialGradient>
+  </defs>
+  <rect width="1024" height="1024" fill="url(#base)"/>
+  <rect width="1024" height="1024" fill="url(#depth)"/>
+  <rect width="1024" height="1024" fill="url(#light)"/>
+  <rect width="1024" height="1024" fill="url(#sheen)"/>
+</svg>`
+}
+
+/** The white mark, `share` of the canvas tall, centred, with a soft shadow for depth. */
+function mark(size, share, shadow = true) {
+  const scale = (1024 * share) / MARK.h
+  const w = MARK.w * scale
+  const h = MARK.h * scale
+  const tx = (1024 - w) / 2 - MARK.x * scale
+  const ty = (1024 - h) / 2 - MARK.y * scale
+  return `<svg xmlns="http://www.w3.org/2000/svg" width="${size}" height="${size}" viewBox="0 0 1024 1024">
+  <defs>
+    <linearGradient id="ink" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0" stop-color="#ffffff"/>
+      <stop offset="1" stop-color="#e7e7ec"/>
+    </linearGradient>
+    <filter id="lift" x="-20%" y="-20%" width="140%" height="140%">
+      <feDropShadow dx="0" dy="14" stdDeviation="22" flood-color="#000000" flood-opacity="0.45"/>
+    </filter>
+  </defs>
+  <g ${shadow ? 'filter="url(#lift)"' : ''}>
+    <path transform="translate(${tx} ${ty}) scale(${scale})" fill="url(#ink)" d="${markPath}"/>
+  </g>
+</svg>`
+}
+
+async function render(svg, file) {
+  await sharp(Buffer.from(svg)).png().toFile(join(outDir, file))
+}
+
+async function composite(background, overlay, file, size) {
+  const base = await sharp(Buffer.from(background)).resize(size, size).png().toBuffer()
+  const top = await sharp(Buffer.from(overlay)).resize(size, size).png().toBuffer()
+  await sharp(base).composite([{ input: top }]).flatten({ background: LAUNCH_BG }).png().toFile(join(outDir, file))
+}
+
+// iOS and store listings: one opaque tile, the mark at about half its height.
+await composite(tile(1024), mark(1024, 0.5), 'icon-only.png', 1024)
+// Android adaptive icon: the two layers apart, the mark inside the safe circle.
+await render(tile(1024), 'icon-background.png')
+await render(mark(1024, 0.58), 'icon-foreground.png')
+// Splash: the launch background with the mark, light and dark alike.
+const splashBg = `<svg xmlns="http://www.w3.org/2000/svg" width="2732" height="2732"><rect width="2732" height="2732" fill="${LAUNCH_BG}"/></svg>`
+await composite(splashBg, mark(2732, 0.2, false), 'splash.png', 2732)
+await composite(splashBg, mark(2732, 0.2, false), 'splash-dark.png', 2732)
+
+console.log(`[app-icons] wrote icon and splash sources to ${outDir}`)