refactor: remove Trans.define and see offline as first backend

lua/Trans/core/define.lua

@@ -1,19 +0,0 @@
----@class Trans
----@field define TransDefine
-
----@class TransDefine
-return {
-    ---@type TransMode[]
-    modes = {
-        'normal',
-        'visual',
-        'input',
-    },
-    -- backends = {
-    --     'offline',
-    --     'baidu',
-    -- },
-    frontends = {
-        'hover',
-    }
-}

lua/Trans/core/setup.lua

@@ -1,8 +1,7 @@
 local Trans = require('Trans')
 
 local function set_strategy_opts(conf)
-    local define       = Trans.define
-    local all_modes    = define.modes
+    local all_modes    = Trans.modes
     local all_backends = Trans.backend.all_name
 
     local function parse_backend(backend)
@@ -35,28 +34,6 @@ local function set_strategy_opts(conf)
 end
 
 
-local function set_frontend_opts(conf)
-    local all_frontends = Trans.define.frontends
-
-
-    local global_frontend_opts = conf.frontend
-    local meta = {
-        __index = function(tbl, key)
-            tbl[key] = global_frontend_opts[key]
-            return tbl[key]
-        end
-    }
-
-    for _, frontend in ipairs(all_frontends) do
-        local frontend_opts = global_frontend_opts[frontend]
-        if not frontend_opts then
-            global_frontend_opts[frontend] = setmetatable({}, meta)
-        else
-            setmetatable(frontend_opts, meta)
-        end
-    end
-end
-
 
 local function define_highlights(conf)
     local set_hl     = vim.api.nvim_set_hl
@@ -81,6 +58,5 @@ return function(opts)
     conf.dir = vim.fn.expand(conf.dir)
 
     set_strategy_opts(conf)
-    set_frontend_opts(conf)
     define_highlights(conf)
 end

lua/Trans/init.lua

@@ -23,9 +23,16 @@ end
 ---@class Trans
 ---@field style table @Style module
 ---@field cache table<string, TransData> @Cache for translated data object
+---@field modes string[] @all modes name
+
 local M = metatable('core', {
     style = metatable("style"),
     cache = {},
+    modes = {
+        'normal',
+        'visual',
+        'input',
+    },
     augroup = vim.api.nvim_create_augroup('Trans', { clear = true })
 })