chore(ttsreader): bump image to v202604241543backlog

Merges three parallel backlog lanes onto longsegfix:
- B (hotfix/preview-timeout-2026-04-24): 25s preview-path timeout, 504 on
  expiry, config-tunable via TtsReader:Preview:TimeoutSeconds.
- C (feature/swipe-gestures-2026-04-24): PointerEvent swipe gestures on
  /quick (prev/next sentence) + CSS fade-hint.
- D (feature/bible-defaults-button-2026-04-24): Apply Bible speech
  defaults button on project detail page with confirm + toast.

TtsReader master octopus merge: 730e7fa. Tests 155/155 .NET + 13/13 JS.
28 MCP tools. Built + imported on all 3 RKE2 nodes.

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:v202604241345longsegfix
+          image: localhost/fc-ttsreader-web:v202604241543backlog
           imagePullPolicy: Never
           ports:
             - containerPort: 5217