fix: sync in-memory accountManager when toggling enabled status

The first fix (checking enabled flag in getCurrentAccountForFamily) wasn't
enough because the toggle code only updated disk storage, not the in-memory
AccountManager used for request routing.

Added:
1. setAccountEnabled() method to AccountManager
2. Module-level activeAccountManager reference shared between connect and login
3. Toggle code now syncs both disk storage AND in-memory state

src/plugin.ts

@@ -81,6 +81,9 @@ const MAX_TOAST_COOLDOWN_ENTRIES = 100;
 let softQuotaToastShown = false;
 let rateLimitToastShown = false;
 
+// Module-level reference to AccountManager for access from auth.login
+let activeAccountManager: import("./plugin/accounts").AccountManager | null = null;
+
 function cleanupToastCooldowns(): void {
   if (rateLimitToastCooldowns.size > MAX_TOAST_COOLDOWN_ENTRIES) {
     const now = Date.now();
@@ -998,6 +1001,7 @@ export const createAntigravityPlugin = (providerId: string) => async (
       // Note: AccountManager now ensures the current auth is always included in accounts
 
       const accountManager = await AccountManager.loadFromDisk(auth);
+      activeAccountManager = accountManager;
       if (accountManager.getAccountCount() > 0) {
         accountManager.requestSaveToDisk();
       }
@@ -2288,6 +2292,7 @@ export const createAntigravityPlugin = (providerId: string) => async (
                     if (acc) {
                       acc.enabled = acc.enabled === false;
                       await saveAccounts(existingStorage);
+                      activeAccountManager?.setAccountEnabled(menuResult.toggleAccountIndex, acc.enabled);
                       console.log(`\nAccount ${acc.email || menuResult.toggleAccountIndex + 1} ${acc.enabled ? 'enabled' : 'disabled'}.\n`);
                     }
                   }

src/plugin/accounts.ts

@@ -796,6 +796,16 @@ export class AccountManager {
     });
   }
 
+  setAccountEnabled(accountIndex: number, enabled: boolean): boolean {
+    const account = this.accounts[accountIndex];
+    if (!account) {
+      return false;
+    }
+    account.enabled = enabled;
+    this.requestSaveToDisk();
+    return true;
+  }
+
   removeAccount(account: ManagedAccount): boolean {
     const idx = this.accounts.indexOf(account);
     if (idx < 0) {