Make the @as casts actually apply

emmylua only parses the inline cast as `--[[@as T]]`, the spaced form
`--[[ @as T ]]` is treated as a plain comment, so all 149 of them were
doing nothing.

LuaGuiElement.style is a union because a style name can be assigned to
it, so reading it back needs the cast.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

exp_roles/module/control.lua

@@ -284,7 +284,7 @@ local server_role = setmetatable({
 --- @param player LuaPlayer | string | nil
 --- @return ExpRoles.Role[]
 function ExpRoles.get_player_roles(player)
-    local player_name = type(player) == "table" and player.name or player --[[ @as string? ]]
+    local player_name = type(player) == "table" and player.name or player --[[@as string?]]
     -- The server is not a player and is allowed to do anything
     if player_name == nil then return { server_role } end
 
@@ -678,7 +678,7 @@ end
 --- @param silent boolean?
 --- @param sync boolean
 local function change_player_roles(player, roles, change_type, by_player_name, silent, sync)
-    local player_name = type(player) == "table" and player.name or player --[[ @as string? ]]
+    local player_name = type(player) == "table" and player.name or player --[[@as string?]]
     if not player_name then return end
 
     local role_objects = resolve_roles(roles)