refactor code as requested

Author: Rustem Galiullin

lua/leetcode-ui/layout/console.lua

@@ -73,28 +73,6 @@ function ConsoleLayout:set_keymaps(keymaps)
     end
 end
 
-function ConsoleLayout:open_url()
-    local command
-    local p = io.popen("uname")
-    local os_name
-
-    if p then
-        os_name = p:read("*l")
-        p:close()
-    end
-
-    if os_name == "Linux" then
-        command = string.format("xdg-open '%s'", self.question.cache.link)
-    elseif os_name == "Darwin" then
-        command = string.format("open '%s'", self.question.cache.link)
-    else
-        -- Fallback to Windows if uname is not available or does not match Linux/Darwin.
-        command = string.format("start \"\" \"%s\"", self.question.cache.link)
-    end
-
-    os.execute(command)
-end
-
 ---@param parent lc.ui.Question
 function ConsoleLayout:init(parent)
     self.question = parent

lua/leetcode/command/init.lua

@@ -250,7 +250,22 @@ function cmd.open()
     local utils = require("leetcode.utils")
     utils.auth_guard()
     local q = utils.curr_question()
-    if q then q.console:open_url() end
+
+    if q then
+        local command
+        local os_name = vim.loop.os_uname().sysname
+
+        if os_name == "Linux" then
+            command = string.format("xdg-open '%s'", q.cache.link)
+        elseif os_name == "Darwin" then
+            command = string.format("open '%s'", q.cache.link)
+        else
+            -- Fallback to Windows if uname is not available or does not match Linux/Darwin.
+            command = string.format("start \"\" \"%s\"", q.cache.link)
+        end
+
+        vim.cmd("!" .. command)
+    end
 end
 
 function cmd.fix()