fix(fzf): add vertical offset for complex window borders

lua/dropbar/menu.lua

@@ -942,6 +942,7 @@ function dropbar_menu_t:fuzzy_find_open(opts)
   local border = win_config.border
   local has_left_border = false
   local has_bottom_border = false
+  local has_top_border = false
   if type(border) == 'string' then
     if border ~= 'shadow' and border ~= 'none' then
       has_left_border = true
@@ -953,11 +954,35 @@ function dropbar_menu_t:fuzzy_find_open(opts)
     has_bottom_border = len_border == 1 and border[1] ~= ''
       or len_border <= 4 and border[2] ~= ''
       or border[8] ~= ''
+    -- remove the top border to avoid overlap with the menu
+    -- the fzf window will never have a title so it's safe to remove
+    -- the header unless the border is specified by name
+    if len_border == 8 then
+      border[1] = ''
+      border[2] = ''
+      border[3] = ''
+    elseif len_border == 4 then
+      border[1] = ''
+    else
+      -- a single char is repeated, so we create
+      -- a new array with the char repeated, but
+      -- the top border removed
+      local ch = border[1]
+      for i = 1, 8 do
+        if i < 4 then
+          border[i] = ''
+        else
+          border[i] = ch
+        end
+      end
+    end
   end
 
   -- make sure that fzf window aligns well with menu window
   win_config.col = has_left_border and -1 or 0
-  win_config.row = self._win_configs.height + (has_bottom_border and 1 or 0)
+  win_config.row = self._win_configs.height
+    + (has_bottom_border and 1 or 0)
+    + (has_top_border and -1 or 0)
 
   -- don't show title in the fzf window
   win_config.title = nil