fix(call-to-play): explain peer startup state

Treat an unavailable actor ID or an explicit not-ready result as normal peer
startup and tell the user that LAN connection is still in progress. Clear that
message when snapshot registration succeeds.

Map obsolete, missing-history, and active-history-limit store failures to
distinct guidance without marking a healthy transport unavailable. Preserve a
generic message for unexpected publish failures.

Test Plan:
- just frontend-test
- just build
- git diff --cached --check

crates/lanspread-tauri-deno-ts/tests/callToPlay.test.ts

@@ -1,8 +1,10 @@
 import {
+    CALL_TO_PLAY_CONNECTING_MESSAGE,
     CHECKIN_LEAD_MS,
     EXPIRED_RETENTION_MS,
     TERMINAL_RETENTION_MS,
     activeCallCount,
+    callToPlayPublishErrorMessage,
     extendDeadline,
     phaseOf,
     bumpTime,
@@ -178,6 +180,34 @@ Deno.test('adding time extends from the current deadline or the current time', (
     );
 });
 
+Deno.test('publish failures distinguish startup and store outcomes', () => {
+    assertEquals(
+        CALL_TO_PLAY_CONNECTING_MESSAGE,
+        'Call to Play is still connecting to the LAN. Try again in a moment.',
+        'peer startup message',
+    );
+    assertEquals(
+        callToPlayPublishErrorMessage('Call to Play event is obsolete'),
+        'This Call to Play has expired or already finished.',
+        'obsolete call message',
+    );
+    assertEquals(
+        callToPlayPublishErrorMessage('Call to Play history is missing'),
+        'This Call to Play has expired or already finished.',
+        'missing expired history message',
+    );
+    assertEquals(
+        callToPlayPublishErrorMessage(new Error('Call to Play event history is full')),
+        'Call to Play has reached its active update limit. Start or cancel an active call, then try again.',
+        'active history limit message',
+    );
+    assertEquals(
+        callToPlayPublishErrorMessage('channel closed'),
+        'Could not send this Call to Play update.',
+        'unexpected failure message',
+    );
+});
+
 Deno.test('reduction is order-independent and deduplicates events and messages', () => {
     const message = event('message-event', 'Bob', {
         SendMessage: { message_id: 'message-1', text: 'Ready?' },