Update launch-checklist.mdx (#441)

* Update launch-checklist.mdx

Fix broken links from recent IA changes

* Update launch-checklist.mdx

Author: ericbrown99

docs/mini-apps/quickstart/launch-checklist.mdx

@@ -16,37 +16,37 @@ Base Build unlocks Builder Rewards, boosts your chances of being featured, provi
 
 Authenticate when it unlocks value, not before. Fast, optional sign‑in keeps momentum and lets users act the moment onchain interactions are needed.
 
-<Card title="Authentication" icon="user" href="/mini-apps/features/Authentication" />
+<Card title="Authentication" icon="user" href="/mini-apps/core-concepts/authentication" />
 
 ## Manifest
 
 Your manifest powers saving, discovery, and rich embeds. A strong manifest includes complete fields, valid assets, and `noindex: true` during testing.
 
-<Card title="Sign Your Manifest" icon="signature" href="/mini-apps/features/sign-manifest" />
+<Card title="Sign Your Manifest" icon="signature" href="/mini-apps/core-concepts/manifest" />
 
 ## Embeds & Previews
 
 Distribution starts in the feed: compelling previews with a clear image and launch button turn impressions into launches.
 
-<Card title="Embeds & Previews" icon="image" href="/mini-apps/features/embeds-and-previews" />
+<Card title="Embeds & Previews" icon="image" href="/mini-apps/core-concepts/embeds-and-previews" />
 
 ## Search & Discovery
 
 Be found across surfaces: set a primary category, share once to trigger indexing, and keep assets valid to appear in search and categories.
 
-<Card title="Search & Discovery" icon="magnifying-glass" href="/mini-apps/features/search-and-discovery" />
+<Card title="Search & Discovery" icon="magnifying-glass" href="/mini-apps/technical-guides/search-and-discovery" />
 
 ## Sharing & Social Graph
 
 Design for social lift: native share flows and social navigation turn single‑player moments into threads and returns.
 
-<Card title="Sharing & Social Graph" icon="share" href="/mini-apps/features/sharing-and-social-graph" />
+<Card title="Sharing & Social Graph" icon="share" href="/mini-apps/technical-guides/sharing-and-social-graph" />
 
 ## Notifications (coming soon)
 
 Re‑engage saved users with relevant, rate‑limited notifications at the right moments.
 
-<Card title="Notifications" icon="bell" href="/mini-apps/features/notifications" />
+<Card title="Notifications" icon="bell" href="/mini-apps/core-concepts/notifications" />
 
 ## UX Best Practices