App icon: violet heart + ECG pulse on the dashboard's dark palette

Replaces the Expo template icons; adaptive foreground/monochrome/splash
generated from assets/icon-src/*.svg (rsvg-convert).

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

assets/icon-src/glyph.svg

@@ -0,0 +1,25 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024">
+  <defs>
+    <linearGradient id="heart" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0%" stop-color="#8a86ff"/>
+      <stop offset="100%" stop-color="#5b57d6"/>
+    </linearGradient>
+  </defs>
+  <!-- glyph only, transparent bg, scaled into the adaptive-icon safe zone -->
+  <g transform="translate(512 512) scale(0.62) translate(-512 -512)">
+    <path d="M512 812
+             C 402 726, 232 616, 210 462
+             C 196 360, 268 268, 372 268
+             C 436 268, 486 304, 512 356
+             C 538 304, 588 268, 652 268
+             C 756 268, 828 360, 814 462
+             C 792 616, 622 726, 512 812 Z"
+          fill="url(#heart)"/>
+    <polyline points="60,520 330,520 385,520 425,414 478,626 528,368 576,556 608,520 964,520"
+              fill="none" stroke="#0d0d0f" stroke-width="58"
+              stroke-linecap="round" stroke-linejoin="round"/>
+    <polyline points="60,520 330,520 385,520 425,414 478,626 528,368 576,556 608,520 964,520"
+              fill="none" stroke="#ffffff" stroke-width="26"
+              stroke-linecap="round" stroke-linejoin="round"/>
+  </g>
+</svg>