fix(keys): fixed adding managed keys

lua/lazy/core/handler/init.lua

@@ -95,8 +95,8 @@ function M:add(plugin)
     if not self.active[key] then
       self.active[key] = {}
       self:_add(value)
+      self.managed[key] = key
     end
-    self.managed[key] = self.managed[key]
     self.active[key][plugin.name] = plugin.name
   end
 end

lua/lazy/core/handler/keys.lua

@@ -47,7 +47,7 @@ end
 ---@param mode? string
 function M:have(lhs, mode)
   local keys = M.parse(lhs, mode)
-  return self.managed[keys.id]
+  return self.managed[keys.id] ~= nil
 end
 
 ---@param plugin LazyPlugin