What

Rewrites the landing hero's closing caption (content/index.md). It previously stated only negatives — "No separate frontend, no build step, no generated code" — and never told the reader the payoff or teased the spine that follows, so the "real app, not a toy" claim (which lands one section later) went unearned.

The new copy is a two-beat block, in relatable terminology (SPA, REST API, frontend framework, progressive enhancement, real-time):

1. The payoff the literal 20-line greet app already delivers — live in-place updates, no full reload, no JavaScript you had to write.
2. The real-app features that are "a small diff on this exact code" — form validation, loading states, progressive enhancement, real-time cross-tab sync, multiplayer/collaborative views, file uploads — i.e. exactly what the rest of the page builds, step by step.

-    <p class="hero-cap">That's the whole app — ~20 lines of Go and standard HTML. No separate frontend, no build step, no generated code.</p>
+    <p class="hero-cap">That's the whole app — ~20 lines of Go and standard HTML. No SPA framework, no REST API, no build step.</p>
+    <p class="hero-cap">It reads like a classic server-rendered form, but it <b>behaves like a modern app</b>: the page updates live, with no full reload and no JavaScript you had to write. From here, everything you'd reach for a frontend framework to do — form validation, loading states, progressive enhancement, real-time sync across tabs, multiplayer/collaborative views, file uploads — is a <b>small diff on this exact code</b>. The rest of this page builds them, one step at a time.</p>

Accuracy note

The hero embeds the storeless examples/greet (state re-cloned to initial on every fresh request), so "works without JavaScript" is deliberately kept in the diff-away bucket as "progressive enhancement" — the bare 20 lines submit a plain POST but render the default; persisting across a no-JS round-trip needs the separate greet-nojs store. No claim is made that the literal hero app works identically with JS off.

Verification

• tinkerdown validate content/ — 93/93 pages, 0 errors
• chromedp render check against the prod Docker image: all new copy renders, old caption gone, greet embed still mounts (visually confirmed)
• GOWORK=off go test ./cmd/... ./examples/... green

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