feat: implement granular access revocation and global unsharing in the account permissions dialog

frontend/src/hooks/useAccounts.tsx

@@ -40,6 +40,8 @@ interface AccountsContextType {
   switchAccount: (loginName: string) => Promise<void>;
   openSteamLogin: (steamId: string) => Promise<void>;
   shareAccountWithUser: (steamId: string, targetSteamId: string) => Promise<any>;
+  revokeAccountAccess: (steamId: string, targetSteamId: string) => Promise<any>;
+  revokeAllAccountAccess: (steamId: string) => Promise<any>;
   
   // Server Methods
   updateServerConfig: (config: Partial<ServerConfig>) => Promise<void>;
@@ -136,6 +138,18 @@ export const AccountsProvider: React.FC<{ children: React.ReactNode }> = ({ chil
     return res;
   };
 
+  const revokeAccountAccess = async (steamId: string, targetSteamId: string) => {
+    const res = await (window as any).electronAPI.revokeAccountAccess(steamId, targetSteamId);
+    await syncNow();
+    return res;
+  };
+
+  const revokeAllAccountAccess = async (steamId: string) => {
+    const res = await (window as any).electronAPI.revokeAllAccountAccess(steamId);
+    await syncNow();
+    return res;
+  };
+
   const updateServerConfig = async (config: Partial<ServerConfig>) => {
     const updated = await (window as any).electronAPI.updateServerConfig(config);
     setServerConfig(updated);
@@ -159,7 +173,7 @@ export const AccountsProvider: React.FC<{ children: React.ReactNode }> = ({ chil
     <AccountsContext.Provider value={{ 
       accounts, serverConfig, isLoading, isSyncing, addAccount, updateAccount, deleteAccount, 
       switchAccount, openSteamLogin, updateServerConfig, loginToServer, 
-      getCommunityAccounts, getServerUsers, shareAccountWithUser, syncNow, refreshAccounts 
+      getCommunityAccounts, getServerUsers, shareAccountWithUser, revokeAccountAccess, revokeAllAccountAccess, syncNow, refreshAccounts 
     }}>
       {children}
     </AccountsContext.Provider>