feat: enhance Windows compatibility with process handling and UI improvements

electron/app/ipc/libreoffice_install_handlers.ts

@@ -211,6 +211,7 @@ async function installWindows(wc: WebContents): Promise<void> {
     const ps = `$p = Start-Process -FilePath "msiexec" -ArgumentList "/i", '${destEscaped}', "/qn", "/norestart" -Verb RunAs -Wait -PassThru; if ($p) { exit $p.ExitCode } else { exit 1 }`;
     const child = spawn("powershell", ["-NoProfile", "-ExecutionPolicy", "Bypass", "-Command", ps], {
       stdio: ["ignore", "pipe", "pipe"],
+      windowsHide: true,
     });
     child.stdout?.on("data", (d: Buffer) => sendLog(wc, "info", d.toString()));
     child.stderr?.on("data", (d: Buffer) => sendLog(wc, "warn", d.toString()));

electron/app/main.ts

@@ -30,6 +30,10 @@ ipcMain.handle("startup:get-status", () => startupStatus);
 
 app.commandLine.appendSwitch('gtk-version', '3');
 
+// Work around Chromium/Electron GPU compositor issues that can cause
+// startup white screens on some Linux/driver combinations.
+app.disableHardwareAcceleration();
+
 // Mitigate "Unable to move the cache: Access is denied" on Windows (Chromium disk cache).
 // Use explicit cache paths and remove stale old_* dirs that cause move failures.
 if (process.platform === "win32") {

electron/app/utils/libreoffice-check.ts

@@ -280,6 +280,7 @@ export async function isLibreOfficeInstalled(): Promise<LibreOfficeCheckResult>
         const quoted = `"${candidate}"`;
         const { stdout } = await execAsync(`${quoted} --version`, {
           timeout: 8_000,
+          windowsHide: process.platform === "win32",
         });
         return { installed: true, version: stdout.trim(), path: candidate };
       } catch {
@@ -293,6 +294,7 @@ export async function isLibreOfficeInstalled(): Promise<LibreOfficeCheckResult>
   try {
     const { stdout } = await execAsync("soffice --version", {
       timeout: 8_000,
+      windowsHide: process.platform === "win32",
     });
     // Found via PATH – record the bare command name as the path so callers
     // can pass it directly to subprocess invocations.

electron/app/utils/servers.ts

@@ -40,8 +40,9 @@ export async function startFastApiServer(
     args,
     {
       cwd: directory,
-      stdio: ["inherit", "pipe", "pipe"],
+      stdio: ["ignore", "pipe", "pipe"],
       env: { ...process.env, ...env },
+      windowsHide: process.platform === "win32" && !isDev,
     }
   );
   fastApiProcess.stdout.on("data", (data: any) => {

electron/servers/fastapi/server.spec

@@ -72,7 +72,7 @@ exe = EXE(
     bootloader_ignore_signals=False,
     strip=False,
     upx=True,
-    console=True,
+    console=False,
     disable_windowed_traceback=False,
     argv_emulation=False,
     target_arch=None,