Bump version to 4.3

Update application version from 4.2 to 4.3 across the project: adjust MakeReleaseZip (zip filename), index.html and index_vi.html (schema.org softwareVersion and visible version badge), media/latest_version_checker.json (latest_version), and src/SplashManager.cs (CurrentVersion constant). Prepares and aligns files for the 4.3 release.

Author: thanhkeke97

MakeReleaseZip.bat

@@ -1,5 +1,5 @@
 SET APP_NAME=RSTGameTranslation
-SET APP_VERSION=4.2
+SET APP_VERSION=4.3
 SET FNAME=%APP_NAME%_v%APP_VERSION%.zip
 node update-version.js
 

index.html

@@ -254,7 +254,7 @@
             "price": "0",
             "priceCurrency": "USD"
         },
-        "softwareVersion": "4.2",
+        "softwareVersion": "4.3",
         "author": {
             "@type": "Person",
             "name": "thanhkeke97"
@@ -275,7 +275,7 @@
             <h1>🎮 RSTGameTranslation</h1>
             <p>Real-time Screen Translation for Gaming</p>
             <div style="text-align:center;margin-top:6px;">
-                <div class="version-badge">Version 4.2</div>
+                <div class="version-badge">Version 4.3</div>
                 <div>
                     <a class="bmc-btn" href="https://www.buymeacoffee.com/thanhkeke97" target="_blank" rel="noopener noreferrer">☕ Buy me a coffee</a>
                 </div>

index_vi.html

@@ -261,7 +261,7 @@
             "price": "0",
             "priceCurrency": "VND"
         },
-        "softwareVersion": "4.2",
+        "softwareVersion": "4.3",
         "author": {
             "@type": "Person",
             "name": "thanhkeke97"
@@ -283,7 +283,7 @@
             <h1>🎮 RSTGameTranslation</h1>
             <p>Phần mềm Dịch Màn hình Game Thời gian thực</p>
             <div style="text-align:center;margin-top:6px;">
-                <div class="version-badge">Phiên bản 4.2</div>
+                <div class="version-badge">Phiên bản 4.3</div>
                 <div>
                     <a class="bmc-btn" href="https://www.buymeacoffee.com/thanhkeke97" target="_blank" rel="noopener noreferrer">☕ Ủng hộ tác giả</a>
                 </div>

src/SplashManager.cs

@@ -32,7 +32,7 @@ public class SplashManager
         // Event to notify when splash screen is closed
         public event EventHandler? SplashClosed;
 
-        public const double CurrentVersion = 4.2;
+        public const double CurrentVersion = 4.3;
         private const string VersionCheckerUrl = "https://raw.githubusercontent.com/thanhkeke97/RSTGameTranslation/refs/heads/main/media/latest_version_checker.json";
 
         private class VersionInfo