fix: safe open file (#2289)

lua/avante/utils/init.lua

@@ -985,6 +985,19 @@ function M.get_chat_mentions()
   return mentions
 end
 
+local function safe_open_file(filename)
+  local ok, _ = pcall(vim.cmd, "noautocmd edit " .. filename)
+  if ok then
+    -- Manually trigger necessary events
+    vim.cmd("doautocmd BufRead")
+  else
+    -- Fallback solution
+    vim.cmd("enew")
+    vim.api.nvim_buf_set_name(0, filename)
+    vim.bo.filetype = vim.fn.fnamemodify(filename, ":e")
+  end
+end
+
 ---@param path string
 ---@param set_current_buf? boolean
 ---@return integer bufnr
@@ -995,7 +1008,7 @@ function M.open_buffer(path, set_current_buf)
 
   local bufnr
   if set_current_buf then
-    vim.cmd("edit " .. abs_path)
+    safe_open_file(abs_path)
     bufnr = vim.api.nvim_get_current_buf()
   else
     bufnr = vim.fn.bufnr(abs_path, true)