Clean up double blank lines and finish Matewawe→Matewave rename

Removed stray duplicate blank lines in README and a trailing space
in the <h1> tag. Updated remaining Matewawe references (icon alt
text, LICENSE notices, CHANGELOG repo links) to Matewave to match
the renamed repository — actual release asset filenames
(Matewawe-vX.X.X.apk) are left untouched since they were already
uploaded under the old name.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015g6ECVSKcBG8CJPrqC3G5o

README.md

@@ -1,8 +1,8 @@
 <p align="center">
-  <img src="assets/icon-rounded.png" width="128" alt="Matewawe icon">
+  <img src="assets/icon-rounded.png" width="128" alt="Matewave icon">
 </p>
 
-<h1 align="center">Matewave </h1>
+<h1 align="center">Matewave</h1>
 
 <p align="center">
   <a href="https://git.skysparkle.cc/kalarina/Matewave/releases"><img src="assets/get-it-on-gitea.png" height="60" alt="Get it on Gitea"></a>
@@ -12,8 +12,6 @@
   <img src="https://img.shields.io/github/downloads/kalarina-bit/Matewave/total?label=downloads&color=2e7d32&labelColor=1b1b1b" alt="downloads counter">
 </p>
 
-
-
 **A beautiful, open-source chess app for Android.**
 
 Play chess against AI, solve chess puzzles, learn and practice
@@ -32,7 +30,6 @@ over Bluetooth and Wi-Fi/LAN.
 - 🌍 English, Russian, German, Japanese, Lithuanian and Chinese
 - 🔓 100% open source
 
-
 ## Screenshots
 
 <p align="center">