v1.2.0:2 — retry login/signup server action once on transport failure

iOS Safari reuses a keep-alive socket the server closed while the login
form sat idle during typing, so the first Sign In / Create account POST
dies instantly with NSURLErrorNetworkConnectionLost ("The network
connection was lost"). That rejects the server-action call, hitting the
client-side catch in LoginForm/SignupForm and showing "An unexpected
error occurred"; the second tap lands on a fresh connection and works.

Add lib/retryAction.ts: retryOnTransportError() retries the action once
only when the call throws. A returned { error } (bad password, rate
limit) is a real result and passes straight through. A lost-on-a-stale-
socket POST never reached the server, so retrying it once is safe.

start9/0.4/startos/versions/index.ts

@@ -16,6 +16,7 @@ import { v_1_1_0_7 } from './v1.1.0.7'
 import { v_1_1_0_8 } from './v1.1.0.8'
 import { v_1_1_0_9 } from './v1.1.0.9'
 import { v_1_2_0_1 } from './v1.2.0.1'
+import { v_1_2_0_2 } from './v1.2.0.2'
 
 /**
  * Version graph for the `proof-of-work` package.
@@ -61,9 +62,13 @@ import { v_1_2_0_1 } from './v1.2.0.1'
  * v1.2.0:1 — Next.js 14 -> 15 / React 18 -> 19 upgrade. Closes the Next
  *            framework RSC + middleware-bypass CVEs; async-params migration
  *            across all [id] routes + server pages. No schema/data change.
+ * v1.2.0:2 — Login/signup first-tap retry: iOS Safari drops the first
+ *            server-action POST on a stale keep-alive socket
+ *            (NSURLErrorNetworkConnectionLost); retry once on transport
+ *            failure. Client-only, no schema/data change.
  */
 export const versionGraph = VersionGraph.of({
-  current: v_1_2_0_1,
+  current: v_1_2_0_2,
   other: [
     v_1_0_0_1,
     v_1_0_0_2,
@@ -81,5 +86,6 @@ export const versionGraph = VersionGraph.of({
     v_1_1_0_7,
     v_1_1_0_8,
     v_1_1_0_9,
+    v_1_2_0_1,
   ],
 })