Add Windows support to desktop JAR copy task

Split the JAR copy command into platform-specific implementations. Unix systems (linux/darwin) use `cp`, while Windows uses PowerShell's Copy-Item with proper directory creation and glob handling. This fixes the desktop build on Windows by replacing the Unix-only `cp` command with a compatible PowerShell equivalent.

.taskfiles/desktop.yml

@@ -166,7 +166,10 @@ tasks:
       - cmd: './gradlew bootJar --no-daemon -PjpdfiumPlatforms={{.JPDFIUM_PLATFORMS}}'
         platforms: [linux, darwin]
       - mkdir -p frontend/editor/src-tauri/libs
-      - cp app/core/build/libs/stirling-pdf-*.jar frontend/editor/src-tauri/libs/
+      - cmd: cp app/core/build/libs/stirling-pdf-*.jar frontend/editor/src-tauri/libs/
+        platforms: [linux, darwin]
+      - cmd: powershell -NoProfile -ExecutionPolicy Bypass -Command "New-Item -ItemType Directory -Force -Path 'frontend/editor/src-tauri/libs' | Out-Null; Copy-Item -Force (Get-ChildItem 'app/core/build/libs/stirling-pdf-*.jar' | Select-Object -First 1) 'frontend/editor/src-tauri/libs'"
+        platforms: [windows]
     status:
       - test -f frontend/editor/src-tauri/libs/stirling-pdf-*.jar
 

frontend/editor/scripts/verify-bundled-jre.mjs

@@ -16,7 +16,9 @@ const required = Number(process.env.REQUIRED_JAVA ?? "25");
 const releasePath = process.argv[2] ?? "runtime/jre/release";
 
 function rebuildRuntime(reason) {
-  console.warn(`${reason} Rebuilding runtime with 'task desktop:jlink:runtime'.`);
+  console.warn(
+    `${reason} Rebuilding runtime with 'task desktop:jlink:runtime'.`,
+  );
 
   const isWindows = process.platform === "win32";
   // Node does not reliably spawn the Task .cmd shim directly on Windows in
@@ -88,7 +90,9 @@ if (!major || major < required) {
   major = parseMajor(raw);
 }
 
-console.log(`Bundled JRE major: ${major || "unknown"} (required >= ${required})`);
+console.log(
+  `Bundled JRE major: ${major || "unknown"} (required >= ${required})`,
+);
 
 if (!major || major < required) {
   console.error(