perf(dashboard): stop refetching on every tab switch; own the QueryClient

Two changes, together removing nearly all the redundant conversation/history
calls visible in the network panel.

Keep-alive modules: Messenger and Inbox were rendered from the tab ternary, so
every tab change UNMOUNTED them — all their state died and returning re-hit the
API. They now mount on first visit and stay mounted, hidden with CSS. Deliberately
mount-on-first-visit rather than eager-mount-both, so opening the dashboard does
not fire two modules' initial loads for a user who never opens either.

QueryClient ownership: the SDK (0.2.0) takes React Query as a peer and falls back
to its own client if it can't find one — but then its cache would be invisible to
the CRM. Providing it here keeps SDK and CRM data in one store, so a write can
invalidate a conversation list. Client is created in useState, not at module
scope, so an SSR render can't leak one user's cache into another's.
refetchOnWindowFocus is off: the socket already pushes live changes, so focus
refetching was pure noise.

Also declares onnxruntime-web@1.21.0, a PINNED peerDependency of
@imgly/background-removal that npm prunes on any re-resolve. The committed lock
had it, so `npm ci` worked and `npm install` silently broke the gallery build —
declaring it directly makes it unprunable.

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

package.json

@@ -14,8 +14,9 @@
     "@huggingface/transformers": "^4.2.0",
     "@imgly/background-removal": "^1.7.0",
     "@insignia/iios-kernel-client": "^0.1.6",
-    "@insignia/iios-messaging-ui": "^0.1.17",
+    "@insignia/iios-messaging-ui": "^0.2.0",
     "@photo-gallery/sdk": "file:./vendor/photo-gallery-sdk",
+    "@tanstack/react-query": "^5.101.4",
     "@tensorflow-models/coco-ssd": "^2.2.3",
     "@tensorflow/tfjs": "^4.22.0",
     "@vladmandic/face-api": "^1.7.15",
@@ -23,6 +24,7 @@
     "leaflet": "^1.9.4",
     "lucide-react": "^1.21.0",
     "next": "16.2.9",
+    "onnxruntime-web": "^1.21.0",
     "react": "19.2.4",
     "react-dom": "19.2.4",
     "tailwind-merge": "^3.6.0",