DX Feedback Loop — Run 3 (2026-03-22)

What triggered this

A naive sub-agent migrating an existing React app to gt-react wasn't sure how granularly to wrap content with <T> — should each paragraph be wrapped? Each section? The whole page? The docs say "you can wrap as much or as little as you want" but don't give clear guidance on the tradeoffs.

What this PR does

Adds a "How much to wrap in a single <T>" section to the <T> component guide template (which generates docs for both gt-next and gt-react). Includes:

• Good examples (logical content blocks, independent cards)
• Bad examples (too narrow fragments, wrapping entire page)
• Rule of thumb and explanation of why wider wrapping gives better translations

Why it matters

This is one of the first decisions developers make after learning about <T>. Without guidance, some wrap every sentence individually (fragmenting translations) while others wrap too much (making maintenance hard). Clear guidance here prevents both failure modes.