fix: validate account on mapping PUT; gate folders btn during run; prune stale mapping keys; drop dead export

web/src/api.ts

@@ -103,9 +103,6 @@ export const probeFolders = (
   creds: { src_login: string; src_pass: string; dst_login: string; dst_pass: string },
 ) => api<ProbeResult>(`/api/tasks/${taskId}/probe`, jsonBody(creds))
 
-export const setFolderMapping = (taskId: number, mapping: Record<string, string>) =>
-  api(`/api/tasks/${taskId}/folder-mapping`, { ...jsonBody({ mapping }), method: 'PUT' })
-
 export const probeAccountFolders = (taskId: number, accId: number) =>
   api<ProbeResult>(`/api/tasks/${taskId}/accounts/${accId}/probe`, { method: 'POST' })
 

web/src/components/FolderMappingModal.tsx

@@ -42,7 +42,7 @@ export function FolderMappingModal({
   const valueFor = (src: string) => choice[src] ?? defaultDst(src, dstFolders, initialMapping)
 
   function confirm() {
-    const mapping: Record<string, string> = { ...initialMapping }
+    const mapping: Record<string, string> = {}
     const excluded: string[] = []
     for (const src of srcFolders) {
       if (synced[src] === false) {

web/src/pages/TaskDetail.tsx

@@ -577,7 +577,7 @@ export function TaskDetail({ id }: { id: number }) {
                     <td className="num-cell">{a.errors}</td>
                     <td className="num-cell">
                       <div className="row-actions">
-                        {a.status !== 'running' && (
+                        {a.status !== 'running' && data?.task.status !== 'running' && (
                           <button
                             type="button"
                             className="link-btn"