feat: make Vue nodes (Nodes 2.0) default for new desktop installs (#9947)

## What

Makes Vue nodes (Nodes 2.0) the default renderer for new desktop app
installs (version ≥1.41.0), matching the behavior already live for cloud
new installs.

## Why

Step 2 of the Nodes 2.0 rollout sequence:
1. ✅ Cloud new installs (≥1.41.0) — DONE
2. 👉 **Desktop app (new installs)** — this PR
3. ⬜ Local installs
4. ⬜ Remove Beta tag
5. ⬜ GTM announcement

No forced migration — only changes the default for new installs.
Existing users keep their setting. Rollback is a settings flip.

## Change

In `coreSettings.ts`, the `defaultsByInstallVersion` for
`Comfy.VueNodes.Enabled` changes from:
```typescript
defaultsByInstallVersion: { '1.41.0': isCloud },
```
to:
```typescript
defaultsByInstallVersion: { '1.41.0': isCloud || isDesktop },
```

## Gated on

- M2 perf target (≥52 FPS on 245-node workflow) — layer merge landed,
likely met
- M-DevRel migration docs (blocks Beta tag removal, not this flip)

Draft PR — ceremonial, to be merged when M2 checkpoint passes.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9947-feat-make-Vue-nodes-Nodes-2-0-default-for-new-desktop-installs-3246d73d365081b280dfff932c7aa016)
by [Unito](https://www.unito.io)

src/platform/settings/constants/coreSettings.ts

@@ -1,5 +1,5 @@
 import { LinkMarkerShape, LiteGraph } from '@/lib/litegraph/src/litegraph'
-import { isCloud } from '@/platform/distribution/types'
+import { isCloud, isDesktop } from '@/platform/distribution/types'
 import { useSettingStore } from '@/platform/settings/settingStore'
 import type { SettingParams } from '@/platform/settings/types'
 import type { ColorPalettes } from '@/schemas/colorPaletteSchema'
@@ -1159,7 +1159,7 @@ export const CORE_SETTINGS: SettingParams[] = [
     tooltip:
       'Modern: DOM-based rendering with enhanced interactivity, native browser features, and updated visual design. Classic: Traditional canvas rendering.',
     defaultValue: false,
-    defaultsByInstallVersion: { '1.41.0': isCloud },
+    defaultsByInstallVersion: { '1.41.0': isCloud || isDesktop },
     sortOrder: 100,
     experimental: true,
     versionAdded: '1.27.1'