[junaiddshaukat]

Why

• "Submit for review" rejected normal LinkedIn links. Only links containing activity-<id> worked. Links from LinkedIn's share button are lnkd.in short links or contain ugcPost-<id>, so they failed with "Please paste a public LinkedIn post link".
• Posts that write "dev weekend" (singular) or similar spellings didn't count as mentioning Dev Weekends.

What changes

• Every kind of post link is accepted in the /feed submit form and the admin "Add posts by link" box:
  • https://lnkd.in/... short links (followed only on lnkd.in, at most 3 redirects)
  • /posts/...-ugcPost-<id> and /posts/...-share-<id>. The activity ID is read from the post's public embed.
  • /feed/update/urn:li:activity|ugcPost|share:<id>
  • Tracking parameters like ?utm_source=share are dropped.
• Typo-tolerant mention check: "Dev Weekends", "dev weekend", "DevWeekend", "#devweekends", "dev-weekends" and "dev_weekends", in any letter case. The search pre-filter uses the same match, so more real posts reach the full check.
• Admin import is capped at 300 links per paste.
• Resubmitting a post that was already reviewed and hidden now says so, instead of "waiting for review".

Testing

• Link resolution against real LinkedIn: 11 cases pass, including both links that failed on the live site. Both resolve to the same post, activity 7458002700706672640. Non-LinkedIn links, profile links, http:// links and broken short links are rejected.
• On a local server with a throwaway database:
  • The submit API accepts both links. That post is already on the feed (it's in the starter list), and a non-post link gets the new error message.
  • Admin import of the short link, the ugcPost link and a junk link adds the post once and reports the junk link as invalid.
• The 18 posts that "Check live posts" hides still fail with the wider match. None of them says "dev weekend".
• tsc and next lint pass.

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