feat: add automatic account cooldown recovery

Replace session-long account failure pauses with classified 15, 30, 60, and 120 minute cooldowns for temporary account problems. Keep credential, OTP, banned, and disabled states manual while ignoring unknown, file, network, hoster, and bare WAF errors. Reset escalation after confirmed uploads, deduplicate parallel failures, publish revisioned pause snapshots, and show a stable localized countdown with automatic reactivation.

preload.js

@@ -135,8 +135,12 @@ contextBridge.exposeInMainWorld('api', {
   openLogFolder: () => ipcRenderer.invoke('open-log-folder'),
   getJobLog: (jobId) => ipcRenderer.invoke('get-job-log', jobId),
   getSessionFailedAccounts: () => ipcRenderer.invoke('get-session-failed-accounts'),
+  getSessionFailedAccountStates: () => ipcRenderer.invoke('get-session-failed-account-states'),
   resetSessionFailedAccount: (payload) => ipcRenderer.invoke('reset-session-failed-account', payload),
   resetAllSessionFailedAccounts: () => ipcRenderer.invoke('reset-all-session-failed-accounts'),
+  onSessionFailedAccountsChanged: (callback) => {
+    ipcRenderer.on('session-failed-accounts-changed', (_event, data) => callback(data));
+  },
   getLogPaths: () => ipcRenderer.invoke('get-log-paths'),
   testWebhook: (payload) => ipcRenderer.invoke('test-webhook', payload),
   revealLogFile: (target) => ipcRenderer.invoke('reveal-log-file', target),
@@ -174,6 +178,7 @@ contextBridge.exposeInMainWorld('api', {
     ipcRenderer.removeAllListeners('folder-monitor:new-files');
     ipcRenderer.removeAllListeners('drop-target:files');
     ipcRenderer.removeAllListeners('account-switched');
+    ipcRenderer.removeAllListeners('session-failed-accounts-changed');
     ipcRenderer.removeAllListeners('remote:client-count');
   }
 });