fix: catch ElectronShellOpenExternalError in IPC handler to preserve boolean contract

The openExternal IPC handler was propagating ElectronShellOpenExternalError
as a rejection instead of resolving with false, breaking the boolean contract
expected by renderer callers. Use Effect.orElseSucceed to return false on
failure, matching the result: Schema.Boolean contract.

Author: cursoragent

apps/desktop/src/ipc/methods/window.ts

@@ -141,6 +141,6 @@ export const openExternal = DesktopIpc.makeIpcMethod({
   result: Schema.Boolean,
   handler: Effect.fn("desktop.ipc.window.openExternal")(function* (url) {
     const shell = yield* ElectronShell.ElectronShell;
-    return yield* shell.openExternal(url);
+    return yield* shell.openExternal(url).pipe(Effect.orElseSucceed(() => false));
   }),
 });