feat: auto-assign signingOrder and adjust on signer deletion

Auto-assign incrementing signingOrder to new signers in ordered_numeric
mode. When deleting a signer, decrement signingOrder of subsequent
signers to close gaps and maintain sequential ordering.

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

Author: vitormattos

src/store/files.js

@@ -215,6 +215,13 @@ export const useFilesStore = function(...args) {
 						break
 					}
 				}
+				if (!signer.signingOrder) {
+					const signatureFlow = loadState('libresign', 'signature_flow', 'parallel')
+					if (signatureFlow === 'ordered_numeric') {
+						const maxOrder = this.getFile().signers.reduce((max, s) => Math.max(max, s.signingOrder || 0), 0)
+						signer.signingOrder = maxOrder + 1
+					}
+				}
 				this.getFile().signers.push(signer)
 				const selected = this.selectedNodeId
 				this.selectFile(-1) // to force reactivity
@@ -228,11 +235,22 @@ export const useFilesStore = function(...args) {
 						signRequestId: signer.signRequestId,
 					}))
 				}
+
+				const signatureFlow = loadState('libresign', 'signature_flow', 'parallel')
+
 				set(
 					this.files[this.selectedNodeId],
 					'signers',
 					this.files[this.selectedNodeId].signers.filter((i) => i.identify !== signer.identify),
 				)
+
+				if (signatureFlow === 'ordered_numeric' && signer.signingOrder) {
+					this.files[this.selectedNodeId].signers.forEach((s) => {
+						if (s.signingOrder && s.signingOrder > signer.signingOrder) {
+							s.signingOrder -= 1
+						}
+					})
+				}
 			},
 			async delete(file, deleteFile) {
 				file = this.getFile(file)