chore(ttsreader): bump to v202604241555backlog (rebuild with correct publish/)

Previous v202604241543backlog image accidentally used a stale
publish/ directory at the TtsReader repo root (Dockerfile.deploy
says COPY publish/ but my ad-hoc publish wrote to artifacts/publish/).
Rebuilt with a clean copy from artifacts/publish/ to publish/ first.

Confirmed new image has appsettings.json Preview section + the
quick-swipe-gestures.js asset baked in.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/fc-ttsreader/fc-ttsreader.yaml

@@ -142,7 +142,7 @@ spec:
         fsGroupChangePolicy: OnRootMismatch
       containers:
         - name: web
-          image: localhost/fc-ttsreader-web:v202604241543backlog
+          image: localhost/fc-ttsreader-web:v202604241555backlog
           imagePullPolicy: Never
           ports:
             - containerPort: 5217