Post page bugs

[thezbm]

• Post timestamps should show only the date and should not use UTC time.
  Currently, the created and updated times display full datetime. Only the date (e.g. 2025-07-24) should be shown. Local time should be displayed.

• Newly created posts have updated_at as null.
  This causes the updated time to be missing from the UI. It should default to the creation time or be set automatically.

• New posts are not sorted correctly when fetched.
  After creating new posts, they appear unsorted. Posts should be sorted by updated_at in descending order when fetched.

• Search functionality is broken.
  The post search function no longer works.