fix(www): resolve nested anchor hydration error in testimonials

[Yeom-JinHo]

Description

This PR fixes the testimonials tweet card hydration error caused by nested anchor tags.
The testimonials section no longer wraps the entire TweetCard in a Link, but it restores same-tab navigation for empty card areas through a client wrapper.
This preserves the internal links rendered by TweetCard, keeps the hover CTA, and restores navigation behavior on touch devices.

Changes

• Replaced the outer Link wrapper around each testimonials tweet card with a non-interactive div.
• Added a client-side testimonial wrapper that navigates to the tweet when users click or keyboard-activate a non-interactive area of the card.
• Kept View Tweet as a same-tab CTA rendered as Button asChild with Link.
• Preserved internal TweetCard links by ignoring clicks originating from nested interactive elements.
• Kept the hover overlay behavior while restoring blank-area navigation on touch devices.

Motivation

TweetCard already renders multiple anchor elements internally for the profile, tweet permalink, and tweet entities.
Wrapping the full card with next/link produced invalid <a> inside <a> markup, which triggered a Next.js hydration error in the testimonials section.
This change removes the invalid DOM nesting without changing the visible UI design.

Breaking Changes

None.

Screenshots

Device / Browser / Viewport:
Not attached. This change only updates link structure and interaction boundaries; the visible UI remains the same.

Before	After
The full testimonial card was wrapped in a Link, causing nested anchors and a hydration error.	Only the overlay View Tweet CTA is linked, so nested anchors and the hydration error are removed.

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