Actualizar imagen e iconos de marca

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

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  LinkedSign adaptive icon background
+  Radial gradient: indigo center → deep navy edge (mirrors LinkedCorp blue circle)
+-->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <gradient
+        android:type="radial"
+        android:gradientRadius="75%"
+        android:startColor="#5B56F2"
+        android:centerColor="#4338CA"
+        android:endColor="#1E1B4B"/>
+</shape>

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

@@ -1,15 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  LinkedSign adaptive icon foreground — 108×108dp canvas
+  Design: fountain pen (pluma estilográfica) centered in safe zone (72dp)
+-->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="108dp"
     android:height="108dp"
     android:viewportWidth="108"
     android:viewportHeight="108">
+
+    <!-- Pen barrel (cuerpo redondeado) -->
     <path
         android:fillColor="#FFFFFF"
-        android:pathData="M54,18c-11.2,8.4 -22.9,12.6 -35,12.6v21.8c0,24.5 14.8,34.4 35,40.6c20.2,-6.2 35,-16.1 35,-40.6V30.6C76.9,30.6 65.2,26.4 54,18z" />
+        android:pathData="M38,14 L70,14 Q84,14 84,28 L84,62 Q84,76 70,62 L38,62 Q24,76 24,62 L24,28 Q24,14 38,14Z"/>
+
+    <!-- Barrel inner groove (hendidura decorativa) -->
     <path
-        android:fillColor="#4F46E5"
-        android:pathData="M40,38h12c7.9,0 14,5.3 14,12.5S59.9,63 52,63h-4v8h-8V38zm8,7v11h3.7c3.7,0 6.1,-2.1 6.1,-5.5c0,-3.5 -2.4,-5.5 -6.1,-5.5H48z" />
+        android:fillColor="#4338CA"
+        android:alpha="0.30"
+        android:pathData="M50,18 L58,18 Q62,18 62,22 L62,58 Q62,62 58,62 L50,62 Q46,62 46,58 L46,22 Q46,18 50,18Z"/>
+
+    <!-- Pen clip (lateral) -->
     <path
-        android:fillColor="#0F172A"
-        android:pathData="M38,76h32v4H38z" />
+        android:fillColor="#FFFFFF"
+        android:alpha="0.50"
+        android:pathData="M68,16 L73,16 Q75,16 75,18 L75,58 Q75,60 73,60 L68,60 Q66,60 66,58 L66,18 Q66,16 68,16Z"/>
+
+    <!-- Pen nib (plumín triangular) -->
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M38,62 L54,90 L70,62Z"/>
+
+    <!-- Nib center slit -->
+    <path
+        android:strokeColor="#4338CA"
+        android:strokeWidth="2.5"
+        android:strokeAlpha="0.40"
+        android:fillColor="#00000000"
+        android:strokeLineCap="round"
+        android:pathData="M54,67 L54,88"/>
+
+    <!-- Ink drop at nib tip -->
+    <path
+        android:fillColor="#FFFFFF"
+        android:alpha="0.92"
+        android:pathData="M54,90 A4,4 0 1,1 54,98 A4,4 0 1,1 54,90Z"/>
+
 </vector>

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

@@ -1,5 +1,5 @@
 <?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 android:drawable="@drawable/ic_launcher_background" />
     <foreground android:drawable="@drawable/ic_launcher_foreground" />
 </adaptive-icon>

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

@@ -1,5 +1,5 @@
 <?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 android:drawable="@drawable/ic_launcher_background" />
     <foreground android:drawable="@drawable/ic_launcher_foreground" />
 </adaptive-icon>

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">#111827</color>
+    <!-- Fallback color for API < 26 (no adaptive icon support) -->
+    <color name="ic_launcher_background">#312E81</color>
 </resources>