fix: Preserve selectedNodeId during file fetch and send correct identifier

Fix issue where selectedNodeId was being reset to 0 when addFile()
called getAllFiles(). The getAllFiles method resets selectedNodeId
when the file doesn't exist in the store yet, causing problems when
adding new files from the Nextcloud Files app.

Also update payload logic in saveWithVisibleElements and
updateSignatureRequest to send either fileId (for existing
LibreSign files) or nodeId (for new Nextcloud files) based on
whether file.id exists.

This ensures the backend receives the correct identifier type
for each scenario.

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

Author: vitormattos

src/store/files.js

@@ -50,8 +50,10 @@ export const useFilesStore = function(...args) {
 						? { file_id: file.id, force_fetch: true }
 						: { 'nodeIds[]': [nodeId], force_fetch: true }
 
+					const savedSelectedNodeId = this.selectedNodeId
 					const fetchedFiles = await this.getAllFiles(filter)
 					fileData = fetchedFiles[nodeId] || { ...file, signers: [] }
+					this.selectedNodeId = savedSelectedNodeId
 				}
 
 				if (fileData.signers) {
@@ -531,9 +533,13 @@ export const useFilesStore = function(...args) {
 
 				if (uuid || file.uuid) {
 					config.data.uuid = uuid || file.uuid
-				} else {
+				} else if (file.id) {
+					config.data.file = {
+						fileId: file.id,
+					}
+				} else if (file.nodeId) {
 					config.data.file = {
-						fileId: fileId || this.getFile().id,
+						nodeId: file.nodeId,
 					}
 				}
 
@@ -571,9 +577,13 @@ export const useFilesStore = function(...args) {
 
 				if (uuid || file.uuid) {
 					config.data.uuid = uuid || file.uuid
-				} else {
+				} else if (file.id) {
+					config.data.file = {
+						fileId: file.id,
+					}
+				} else if (file.nodeId) {
 					config.data.file = {
-						fileId: fileId || this.getFile().id,
+						nodeId: file.nodeId,
 					}
 				}
 				const { data } = await axios(config)