feat: add user reset-apikey command

Adds `hf user reset-apikey <username>` to regenerate a user API key.
Requires user.manage permission. Returns the new key (shown once only).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/help/leaf.go

@@ -114,6 +114,7 @@ func leafHelpSpec(group, cmd string) (leafHelp, bool) {
 		"user/activate":            {Summary: "Activate a user", Usage: []string{"hf user activate <username>"}, Flags: authFlagHelp()},
 		"user/deactivate":          {Summary: "Deactivate a user", Usage: []string{"hf user deactivate <username>"}, Flags: authFlagHelp()},
 		"user/delete":              {Summary: "Delete a user", Usage: []string{"hf user delete <username>"}, Flags: authFlagHelp()},
+		"user/reset-apikey":        {Summary: "Reset a user's API key", Usage: []string{"hf user reset-apikey <username>"}, Flags: authFlagHelp(), Notes: []string{"The new API key is shown once and cannot be retrieved again."}},
 		"role/list":                {Summary: "List roles", Usage: []string{"hf role list"}, Flags: authFlagHelp()},
 		"role/get":                 {Summary: "Show a role by name", Usage: []string{"hf role get <role-name>"}, Flags: authFlagHelp()},
 		"role/create":              {Summary: "Create a role", Usage: []string{"hf role create --name <role-name> [--desc <desc>] [--global <true|false>]"}, Flags: authFlagHelp()},

internal/help/surface.go

@@ -40,6 +40,7 @@ func CommandSurface() []Group {
 				{Name: "activate", Description: "Activate a user", Permitted: has(perms, "user.manage")},
 				{Name: "deactivate", Description: "Deactivate a user", Permitted: has(perms, "user.manage")},
 				{Name: "delete", Description: "Delete a user", Permitted: has(perms, "user.manage")},
+				{Name: "reset-apikey", Description: "Reset a user's API key", Permitted: has(perms, "user.manage")},
 			},
 		},
 		{