fix(init): reposition cursor after priority toggle re-render

Problem: pressing ! re-sorts the view so the toggled task moves to
the top of its category, but the cursor stays on the original line
number and lands on a different task.

Solution: after buffer.render(), iterate buffer.meta() to find the
new line number for the toggled task's id and call
nvim_win_set_cursor to follow it.

lua/pending/init.lua

@@ -135,6 +135,12 @@ function M.toggle_priority()
   store.update(id, { priority = new_priority })
   store.save()
   buffer.render(bufnr)
+  for lnum, m in ipairs(buffer.meta()) do
+    if m.id == id then
+      vim.api.nvim_win_set_cursor(0, { lnum, 0 })
+      break
+    end
+  end
 end
 
 function M.prompt_date()