Fix MSIX appExecutable path

Explicitly set appExecutable to match packagerConfig.executableName.

Error: The file name "app\TalkToFigma Desktop.exe" doesn't exist
Solution: Set appExecutable to 'talktofigma-desktop.exe' which matches
the actual executable name from packagerConfig.executableName

Author: JooHyung Park

forge.config.ts

@@ -37,6 +37,8 @@ const config: ForgeConfig = {
         packageDisplayName: 'TalkToFigma Desktop',
         // appDisplayName: User-facing app name (spaces allowed)
         appDisplayName: 'TalkToFigma Desktop',
+        // appExecutable: Must match packagerConfig.executableName
+        appExecutable: 'talktofigma-desktop.exe',
       },
       // Code signing will be configured in CI via windowsSignOptions
     }, ['win32']),