feat(app): make session timelines much faster AND without flicker or scroll jumps (#32331)

packages/app/package.json

@@ -17,8 +17,9 @@
     "dev": "vite",
     "build": "vite build",
     "serve": "vite preview",
-    "test": "bun run test:unit",
+    "test": "bun run test:unit && bun run test:virtualizer",
     "test:unit": "bun test --only-failures --preload ./happydom.ts ./src",
+    "test:virtualizer": "bun test --conditions=browser --preload ./happydom.ts ./test-browser/solid-virtual.test.ts",
     "test:unit:watch": "bun test --watch --preload ./happydom.ts ./src",
     "test:e2e": "playwright test",
     "test:e2e:local": "playwright test",
@@ -64,6 +65,7 @@
     "@solidjs/meta": "catalog:",
     "@solidjs/router": "catalog:",
     "@tanstack/solid-query": "5.91.4",
+    "@tanstack/solid-virtual": "catalog:",
     "@thisbeyond/solid-dnd": "0.7.5",
     "diff": "catalog:",
     "effect": "catalog:",
@@ -76,7 +78,6 @@
     "shiki": "catalog:",
     "solid-js": "catalog:",
     "solid-list": "catalog:",
-    "tailwindcss": "catalog:",
-    "virtua": "catalog:"
+    "tailwindcss": "catalog:"
   }
 }