fix: Make initFromState async in sign store

Convert initFromState() to async and await addFile() call to
ensure proper initialization when loading file state.

This maintains consistency with other addFile usage throughout
the codebase.

Signed-off-by: Vitor Mattos <[email protected]>

Author: vitormattos

src/store/sign.js

@@ -33,7 +33,7 @@ export const useSignStore = defineStore('sign', {
 	state: () => ({ ...defaultState }),
 
 	actions: {
-		initFromState() {
+		async initFromState() {
 			this.errors = loadState('libresign', 'errors', [])
 
 			const file = {
@@ -50,7 +50,7 @@ export const useSignStore = defineStore('sign', {
 			}
 			this.setFileToSign(file)
 			const filesStore = useFilesStore()
-			filesStore.addFile(file)
+			await filesStore.addFile(file)
 			filesStore.selectedNodeId = file.nodeId
 		},
 		setFileToSign(file) {