test: migrate fromAny to fromPartial for type-checked test mocks (#10788)

## Summary
- Convert `fromAny` → `fromPartial` in 7 test files where object
literals or interfaces are passed
- `fromPartial` type-checks the provided fields, unlike `fromAny` which
bypasses all checking (same as `as unknown as`)
- Class-based types (`LGraphNode`, `LGraph`) remain `fromAny` due to
shoehorn's `PartialDeep` incompatibility with class constructors

## Changes
- **Pure conversions** (all `fromAny` → `fromPartial`):
`domWidgetZIndex`, `matchPromotedInput`, `promotionUtils`,
`subgraphNavigationStore`
- **Mixed** (some converted, some kept): `promotedWidgetView`,
`widgetUtil`
- **Cleanup**: `nodeOutputStore` type param normalization

Follows up on #10761.

## Test plan
- [x] `pnpm typecheck` passes
- [x] `pnpm vitest run` on all 7 changed files — 169 tests pass
- [x] `pnpm lint` passes

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-10788-test-migrate-fromAny-to-fromPartial-for-type-checked-test-mocks-3356d73d365081f7bf61d48a47af530c)
by [Unito](https://www.unito.io)

src/components/graph/widgets/domWidgetZIndex.test.ts

@@ -1,4 +1,4 @@
-import { fromAny } from '@total-typescript/shoehorn'
+import { fromPartial } from '@total-typescript/shoehorn'
 import { describe, expect, it } from 'vitest'
 
 import { LGraph, LGraphNode } from '@/lib/litegraph/src/litegraph'
@@ -15,7 +15,7 @@ describe('getDomWidgetZIndex', () => {
     first.order = 0
     second.order = 1
 
-    const nodes = fromAny<{ _nodes: LGraphNode[] }, unknown>(graph)._nodes
+    const nodes = fromPartial<{ _nodes: LGraphNode[] }>(graph)._nodes
     nodes.splice(nodes.indexOf(first), 1)
     nodes.push(first)