Fix case-study share chrome, hero lockup width, and copy confirmation in the share dialog.

Marketing pages omitted create-flow nav copy, so Share rendered as a translation key; the case-study banner squeezed hero text to the thumbnail width; Copy link had no hover or copied state.

Co-authored-by: Cursor <cursoragent@cursor.com>

messages/en/marketing.ts

@@ -1,17 +1,15 @@
 /**
  * Marketing-scoped message bundle: every namespace from `./index` EXCEPT the
- * `create.*` subtree. The `create` namespace is ~41 KB gzipped — the largest
- * single contributor to per-route HTML size — and is only used inside
- * `(app)/create/*`. Excluding it from the `(marketing)` group's
- * `MessagesProvider` removes the embed from every marketing HTML response.
+ * bulk of the `create.*` subtree. That subtree is ~41 KB gzipped — the
+ * largest single contributor to per-route HTML size — and wizard copy is
+ * only used inside `(app)/create/*`.
  *
- * The type stays compatible with `typeof import("./index").default` because
- * we satisfy the same key shape (modulo `create`); marketing client
- * components only read keys that exist here. If a future change reaches into
- * `messages.create.*` from a marketing surface, `getTranslation` will return
- * the dotted key as the fallback — visible immediately at runtime.
+ * Case-study completed-rule chrome reuses `CreateFlowTopNav`, so this bundle
+ * includes `create.topNav` only. Other `create.*` keys still fall back to the
+ * dotted path via `getTranslation` if a marketing surface reaches them.
  *
- * Keep this in sync with new entries added to `./index` (excluding `create/`).
+ * Keep this in sync with new entries added to `./index` (excluding wizard
+ * `create/` files other than `create/topNav.json`).
  * See `docs/perf/next16-eval.md` for measurement context.
  */
 import common from "./common.json";
@@ -53,6 +51,7 @@ import metadata from "./metadata.json";
 import modalsShare from "./modals/share.json";
 import modalsPopoverExport from "./modals/popoverExport.json";
 import modalsAskOrganizerInquiry from "./modals/askOrganizerInquiry.json";
+import createTopNav from "./create/topNav.json";
 import type messages from "./index";
 
 const marketingMessages = {
@@ -99,11 +98,13 @@ const marketingMessages = {
     popoverExport: modalsPopoverExport,
     askOrganizerInquiry: modalsAskOrganizerInquiry,
   },
+  create: {
+    topNav: createTopNav,
+  },
 };
 
 // Cast to the full shape so it satisfies `typeof import("./index").default`
-// at the MessagesProvider boundary. Reads of `messages.create.*` from a
-// marketing surface are a code smell and will return the dotted key (the
-// runtime `getTranslation` fallback) — visible immediately.
+// at the MessagesProvider boundary. Reads of wizard `create.*` keys other
+// than `create.topNav` still return the dotted key at runtime.
 export default marketingMessages as typeof messages;