fix(chat): roll fc-chat to chatfix-54fd549 (arm64) — /tickets redirect + send-button recovery

Bump fc-chat image to localhost/fc-chat-web:v20260617-chatfix-54fd549, built
for arm64 on GX10 from Chat master 54fd549 + Common 0a4174d:
- OperatorRouteRedirect bounces ANY unauthorized path to sign-in (was: only
  operator/ops-chat prefixes, so /tickets sat on "Redirecting..." forever)
- FcAiChat send button stays clickable as Cancel while generating + closes
  the reconnect-recovery gap so it re-enables after a circuit drop

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps-gx10/fc-chat/deployment-chat-web.json

@@ -83,7 +83,7 @@
                 }
               }
             ],
-            "image": "localhost/fc-chat-web:v20260617-sec5-chat-358f7ca",
+            "image": "localhost/fc-chat-web:v20260617-chatfix-54fd549",
             "imagePullPolicy": "Never",
             "livenessProbe": {
               "failureThreshold": 3,