feat: optimize track title and update Chinese translation

src/uosc/intl/zh-hans.json

@@ -41,6 +41,8 @@
 	"Loop file": "单个循环",
 	"Loop playlist": "列表循环",
 	"Menu": "菜单",
+	"Move down": "下移",
+	"Move up": "上移",
 	"Navigation": "导航",
 	"Next": "下一个",
 	"Next page": "下一页",

src/uosc/lib/menus.lua

@@ -215,6 +215,8 @@ function create_select_tracklist_type_menu_opener(opts)
 		end
 
 		local track_prop_index, snd_prop_index = get_props()
+		local filename = mp.get_property_native('filename/no-ext')
+		local escaped_filename = string.gsub(filename --[[@as string]], '[%(%)%.%+%-%*%?%[%]%^%$%%]', '%%%1')
 		local first_item_index = #items + 1
 		local active_index = nil
 		local disabled_item = nil
@@ -252,7 +254,16 @@ function create_select_tracklist_type_menu_opener(opts)
 				if track['demux-samplerate'] then h(string.format('%.3gkHz', track['demux-samplerate'] / 1000)) end
 				if track.forced then h(t('forced')) end
 				if track.default then h(t('default')) end
-				if track.external then h(t('external')) end
+				if track.external then
+					local extension = track.title:match('%.([^%.]+)$')
+					if track.title and extension then
+						track.title = track.title:gsub(escaped_filename .. '%.?', ''):gsub('%.?([^%.]+)$', '')
+						if track.lang and track.title:lower() == track.lang:lower() then
+							track.title = nil
+						end
+					end
+					h(t('external'))
+				end
 
 				items[#items + 1] = {
 					title = (track.title and track.title or t('Track %s', track.id)),