fix: RecentPostsWidget TypeError with non-array posts

[sentry]

This PR addresses a TypeError: r.map is not a function occurring in the RecentPostsWidget when the fetchRecentPosts server function returns a non-array value (e.g., an error object).

Changes Made:

1. src/components/RecentPostsWidget.tsx: Modified the conditional rendering logic from if (!visiblePosts) to if (!Array.isArray(visiblePosts)). This ensures that if fetchRecentPosts resolves to a non-array value (like an error object), the component correctly renders the RecentPostsSkeleton instead of attempting to call .map() on an invalid type, which caused the crash.
2. src/utils/blog.functions.ts: Wrapped the body of the fetchRecentPosts handler in a try/catch block. In case of any error during post fetching, it now returns an empty array ([]). This provides a more robust server function that guarantees an array return type, preventing non-array payloads from ever reaching the client-side components.

Why these changes?
The original issue stemmed from fetchRecentPosts potentially returning an object (e.g., { error: "..." }) on failure. The RecentPostsWidget's guard !visiblePosts was insufficient as an object is truthy, and object.length is undefined, bypassing the check. Consequently, RecentPostsList received a non-array and crashed when calling .map(). These changes implement a more precise type check in the widget and a safer return value from the server function, resolving the TypeError and improving resilience.

Fixes TANSTACK-COM-4SC

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	tanstack-com	5a29fad	Commit Preview URL Branch Preview URL	Aug 27 2026, 11:04 PM