feat(wallet-android): brand icon from bns://deviant.x + splash regen

Replaces the generic Capacitor placeholder launcher icon with the
official Deviant mark fetched from bns://deviant.x/brand/icon/icon-512.svg
(the same mark the site uses). Adaptive-icon layers split cleanly for
Android 8+ masks:

- icon-foreground = orbital ring + crescent-D glyph + acid-yellow
  orbital dot (scaled x2.5 from the 512 BNS source so the D reads
  bigger on-launcher without clipping on circular masks)
- icon-background = dark sky radial gradient + faint starfield specks
- icon.svg = full composition for the legacy ic_launcher.png

Sources live at shells/app/assets/{icon,icon-foreground,icon-background}.svg
— a future icon re-roll is one `./node_modules/.bin/capacitor-assets
generate --android` away.

@capacitor/assets regenerated the five mipmap densities (ldpi through
xxxhdpi) + the splash screens (portrait/landscape, light/dark).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

shells/app/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"/>
-    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+    <background>
+        <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>

shells/app/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"/>
-    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+    <background>
+        <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>

shells/app/assets/icon-background.svg

@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="1024" height="1024" viewBox="0 0 1024 1024" role="img" aria-label="Deviant background">
+  <defs>
+    <radialGradient id="sky" cx="32%" cy="28%" r="90%">
+      <stop offset="0%" stop-color="#0c1220"/>
+      <stop offset="55%" stop-color="#070d1a"/>
+      <stop offset="100%" stop-color="#02040a"/>
+    </radialGradient>
+  </defs>
+  <!-- Faithful 2× scale of the official icon-512.svg background: dark sky
+       gradient + starfield specks. -->
+  <rect width="1024" height="1024" fill="url(#sky)"/>
+  <g fill="#b8c2d4" opacity="0.5">
+    <circle cx="192" cy="240" r="4"/>
+    <circle cx="300" cy="172" r="3"/>
+    <circle cx="824" cy="300" r="4"/>
+    <circle cx="760" cy="192" r="3"/>
+    <circle cx="860" cy="784" r="3.6"/>
+    <circle cx="240" cy="816" r="3.2"/>
+  </g>
+</svg>

shells/app/assets/icon-foreground.svg

@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="1024" height="1024" viewBox="0 0 1024 1024" role="img" aria-label="Deviant mark (foreground)">
+  <defs>
+    <filter id="glow" x="-50%" y="-50%" width="200%" height="200%">
+      <feGaussianBlur stdDeviation="25" result="b"/>
+      <feMerge><feMergeNode in="b"/><feMergeNode in="SourceGraphic"/></feMerge>
+    </filter>
+  </defs>
+  <!-- Official bns://deviant.x/brand/icon/icon-512.svg mark, scaled ×2.5
+       (vs the earlier ×2) so the composition reads larger on-launcher. The
+       ring continues to frame the D, dot stays in the upper-right. -->
+  <ellipse cx="512" cy="512" rx="375" ry="230" fill="none" stroke="#2a3650" stroke-width="20" transform="rotate(-22 512 512)"/>
+  <path d="M356 262 h110 a250 250 0 0 1 0 500 h-110 z
+           M464 362 v300 a150 150 0 0 0 0 -300 z"
+        fill="#d6dde9"/>
+  <circle cx="802" cy="347" r="55" fill="#d6ff3d" filter="url(#glow)"/>
+</svg>

shells/app/assets/icon.svg

@@ -0,0 +1,30 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="1024" height="1024" viewBox="0 0 1024 1024" role="img" aria-label="Deviant">
+  <defs>
+    <radialGradient id="sky" cx="32%" cy="28%" r="90%">
+      <stop offset="0%" stop-color="#0c1220"/>
+      <stop offset="55%" stop-color="#070d1a"/>
+      <stop offset="100%" stop-color="#02040a"/>
+    </radialGradient>
+    <filter id="glow" x="-50%" y="-50%" width="200%" height="200%">
+      <feGaussianBlur stdDeviation="25" result="b"/>
+      <feMerge><feMergeNode in="b"/><feMergeNode in="SourceGraphic"/></feMerge>
+    </filter>
+  </defs>
+  <rect width="1024" height="1024" rx="228" fill="url(#sky)"/>
+  <g fill="#b8c2d4" opacity="0.5">
+    <circle cx="192" cy="240" r="4"/>
+    <circle cx="300" cy="172" r="3"/>
+    <circle cx="824" cy="300" r="4"/>
+    <circle cx="760" cy="192" r="3"/>
+    <circle cx="860" cy="784" r="3.6"/>
+    <circle cx="240" cy="816" r="3.2"/>
+  </g>
+  <!-- Mark scaled ×2.5 from the official 512 baseline (×1.25 larger than
+       the previous version) so the D reads bigger on the launcher. Ring +
+       dot scaled together to preserve the composition. -->
+  <ellipse cx="512" cy="512" rx="375" ry="230" fill="none" stroke="#2a3650" stroke-width="20" transform="rotate(-22 512 512)"/>
+  <path d="M356 262 h110 a250 250 0 0 1 0 500 h-110 z
+           M464 362 v300 a150 150 0 0 0 0 -300 z"
+        fill="#d6dde9"/>
+  <circle cx="802" cy="347" r="55" fill="#d6ff3d" filter="url(#glow)"/>
+</svg>