feat: v0.2.0 — real branding, desktop shortcut, WiX installer images

src-tauri/wix/desktop-shortcut.wxs

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  WiX fragment: desktop shortcut for PSG Launcher.
+
+  Tauri's generated main.wxs already declares DesktopFolder at line 94,
+  so we reference it directly — no need to redeclare it here.
+
+  Referenced from tauri.conf.json:
+    bundle.windows.wix.fragmentPaths → ["wix/desktop-shortcut.wxs"]
+    bundle.windows.wix.componentRefs → ["DesktopShortcutComponent"]
+-->
+<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
+  <Fragment>
+    <DirectoryRef Id="DesktopFolder">
+      <Component Id="DesktopShortcutComponent"
+                 Guid="E3A7F2B1-4C8D-4E9A-B3F6-1D2E5A7C9B0F">
+
+        <Shortcut Id="PSGLauncherDesktopShortcut"
+                  Name="PSG Launcher"
+                  Description="PSG Launcher — all-in-one app launcher"
+                  Target="[APPLICATIONFOLDER]psg-launcher.exe"
+                  WorkingDirectory="APPLICATIONFOLDER" />
+
+        <RemoveFolder Id="RemoveDesktopFolder"
+                      Directory="DesktopFolder"
+                      On="uninstall" />
+
+        <RegistryValue Root="HKCU"
+                       Key="Software\PSG\Launcher"
+                       Name="DesktopShortcut"
+                       Type="integer"
+                       Value="1"
+                       KeyPath="yes" />
+      </Component>
+    </DirectoryRef>
+  </Fragment>
+</Wix>