redesign: modern indigo UI, new app icon, edge-to-edge theme

App icon: deep indigo-to-violet gradient background with white sync arrows;
replaced flat #2196F3 with layered adaptive icon.

Theme: disabled dynamic color; rich indigo/teal/amber Material3 palette;
edge-to-edge with transparent status bar; tighter typography letterSpacing.

HomeScreen: colored left accent bar per status; URL-decoded SAF paths;
relative timestamps (Just now / N min ago / N hr ago); indigo status pills;
FilledTonalButton empty state.

PairDetailScreen: hero StatusBanner with large icon and relative time;
InfoCard as bordered grid with icon backgrounds; colored dot event timeline;
URL-decoded local path display.

SettingsScreen: section headers with primary left bar; AccountCard with
primaryContainer icon backgrounds; Security/About in bordered cards.

Bump version to 1.0.13 (code 14).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M12,4V1L8,5l4,4V6c3.31,0 6,2.69 6,6 0,1.01-0.25,1.97-0.7,2.8l1.46,1.46C19.54,15.03 20,13.57 20,12c0-4.42-3.58-8-8-8z"/>
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M12,18c-3.31,0-6,-2.69-6,-6 0,-1.01 0.25,-1.97 0.7,-2.8L5.24,7.74C4.46,8.97 4,10.43 4,12c0,4.42 3.58,8 8,8v3l4,-4-4,-4v3z"/>
+</vector>