fix(picker.preview): fix

lua/snacks/picker/core/preview.lua

@@ -11,6 +11,7 @@
 ---@field title? string
 ---@field split_layout? boolean
 ---@field opts? snacks.picker.previewers.Config
+---@field _spinner? snacks.util.Spinner
 local M = {}
 M.__index = M
 
@@ -164,6 +165,7 @@ function M:show(picker, opts)
   self.item = item
   self.filter = picker:filter()
   self.pos = item and item.pos or nil
+  self:spinner(false)
   if item then
     local buf = self.win.buf
     local ok, err = pcall(
@@ -232,6 +234,7 @@ function M:reset()
   end
   vim.api.nvim_buf_clear_namespace(self.win.buf, -1, 0, -1)
   self:set_title()
+  self:spinner(false)
   vim.treesitter.stop(self.win.buf)
   vim.bo[self.win.buf].modifiable = true
   self:set_lines({})
@@ -289,6 +292,10 @@ function M:highlight(opts)
   end
 end
 
+function M:ns()
+  return ns
+end
+
 -- show the item location
 function M:loc()
   vim.api.nvim_buf_clear_namespace(self.win.buf, ns_loc, 0, -1)
@@ -434,4 +441,18 @@ function M:markdown()
   end
 end
 
+function M:spinner(enable)
+  if enable == false then
+    if self._spinner then
+      self._spinner:stop()
+      self._spinner = nil
+    end
+    return
+  end
+  assert(self.win:buf_valid(), "invalid buffer")
+  local ret = Snacks.picker.util.spinner(self.win.buf)
+  self._spinner = ret
+  return ret
+end
+
 return M