fix: emit opencode_output FileType event when window created

Author: phanen

lua/opencode/ui/output_window.lua

@@ -86,8 +86,6 @@ end
 ---@return integer
 function M.create_buf()
   local output_buf = vim.api.nvim_create_buf(false, true)
-  local filetype = config.ui.output.filetype or 'opencode_output'
-  vim.api.nvim_set_option_value('filetype', filetype, { buf = output_buf })
 
   vim.api.nvim_buf_set_var(output_buf, 'opencode_folds', build_fold_state({}))
 

lua/opencode/ui/ui.lua

@@ -386,6 +386,12 @@ function M.create_windows()
 
   windows.input_win = win_ids.input_win
   windows.output_win = win_ids.output_win
+
+  local filetype = config.ui.output.filetype or 'opencode_output'
+  vim.api.nvim_win_call(windows.output_win, function()
+    vim.api.nvim_set_option_value('filetype', filetype, { buf = buffers.output_buf })
+  end)
+
   windows.saved_width_ratio = state.last_window_width_ratio
 
   input_window.setup(windows)