fix: restore adaptive icon support removed in PR #147

This commit restores Android adaptive icon functionality that was
removed in PR #147. The adaptive icon provides better integration
with Android 8.0+ (API 26+) launcher features including:

- Shape masking (circle, squircle, rounded square, etc.)
- Visual effects and animations
- Themed icons support (Android 13+)

Changes:
- Add ic_launcher_foreground.xml using the V2er logo vector
- Add ic_launcher_monochrome.xml for themed icon support
- Restore mipmap-anydpi-v26 adaptive icon configurations
- Support both regular and round adaptive icons

The foreground icon is derived from app/src/main/res/drawable/logo_svg.xml
to maintain consistency with the app's branding.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: graycreate

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

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <group
+        android:scaleX="0.3"
+        android:scaleY="0.3"
+        android:translateX="21.6"
+        android:translateY="21.6">
+        <path
+            android:pathData="M480.859,520.767C486.88,504.294 483.548,489.658 473.18,476.663C451.429,449.4 429.349,422.4 407.406,395.29C370.115,349.215 332.857,303.113 295.504,257.088C289.433,249.607 286.667,241.349 288.655,231.887C291.203,219.755 301.661,211.145 314.474,211.122C377.739,211 441.006,210.872 504.27,211.25C519.537,211.341 531.854,218.846 541.463,230.737C578.15,276.134 614.877,321.499 651.591,366.874C674.322,394.968 697.004,423.1 719.804,451.138C745.329,482.526 745.544,526.965 719.577,561.007C698.98,588.011 677.793,614.566 656.783,641.254C619.791,688.242 582.734,735.179 545.705,782.138C545.481,782.422 545.252,782.704 545.058,783.008C530.88,805.232 510.818,813.54 484.414,812.973C428.043,811.763 371.628,812.573 315.231,812.615C308.17,812.621 301.574,811.212 295.753,807.12C282.386,797.721 280.036,780.463 290.691,765.962C299.673,753.736 309.315,741.993 318.702,730.065C370.103,664.748 421.516,599.44 472.922,534.126C476.065,530.134 478.821,525.907 480.859,520.767Z"
+            android:fillColor="#000000" />
+    </group>
+</vector>

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

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <group
+        android:scaleX="0.3"
+        android:scaleY="0.3"
+        android:translateX="21.6"
+        android:translateY="21.6">
+        <path
+            android:pathData="M480.859,520.767C486.88,504.294 483.548,489.658 473.18,476.663C451.429,449.4 429.349,422.4 407.406,395.29C370.115,349.215 332.857,303.113 295.504,257.088C289.433,249.607 286.667,241.349 288.655,231.887C291.203,219.755 301.661,211.145 314.474,211.122C377.739,211 441.006,210.872 504.27,211.25C519.537,211.341 531.854,218.846 541.463,230.737C578.15,276.134 614.877,321.499 651.591,366.874C674.322,394.968 697.004,423.1 719.804,451.138C745.329,482.526 745.544,526.965 719.577,561.007C698.98,588.011 677.793,614.566 656.783,641.254C619.791,688.242 582.734,735.179 545.705,782.138C545.481,782.422 545.252,782.704 545.058,783.008C530.88,805.232 510.818,813.54 484.414,812.973C428.043,811.763 371.628,812.573 315.231,812.615C308.17,812.621 301.574,811.212 295.753,807.12C282.386,797.721 280.036,780.463 290.691,765.962C299.673,753.736 309.315,741.993 318.702,730.065C370.103,664.748 421.516,599.44 472.922,534.126C476.065,530.134 478.821,525.907 480.859,520.767Z"
+            android:fillColor="#000000" />
+    </group>
+</vector>

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

@@ -0,0 +1,6 @@
+<?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="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_monochrome" />
+</adaptive-icon>

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

@@ -0,0 +1,6 @@
+<?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="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_monochrome" />
+</adaptive-icon>