Road to no explicit any part 8 group 5 (#8329)

## Summary
- Add `createMockLLink` and `createMockLinks` factory functions to
handle hybrid Map/Record types
- Replace `as any` assertions with type-safe factory functions in
minimap tests
- Implement proper Pinia store mocking using `vi.hoisted()` pattern
- Remove unused `createMockSubgraph` export (shadowed by local
implementations)

## Test plan
- [x] All minimap tests pass (29 tests)
- [x] `pnpm typecheck` passes
- [x] `pnpm lint` passes
- [x] `pnpm knip` passes

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8329-Road-to-no-explicit-any-part-8-group-5-2f56d73d365081218882de81d5526220)
by [Unito](https://www.unito.io)

---------

Co-authored-by: AustinMroz <austin@comfy.org>

src/platform/workflow/validation/composables/useWorkflowValidation.ts

@@ -20,18 +20,15 @@ export function useWorkflowValidation() {
     // Collect all logs in an array
     const logs: string[] = []
     // Then validate and fix links if schema validation passed
-    const linkValidation = fixBadLinks(
-      graphData as unknown as ISerialisedGraph,
-      {
-        fix: true,
-        silent,
-        logger: {
-          log: (message: string) => {
-            logs.push(message)
-          }
+    const linkValidation = fixBadLinks(graphData as ISerialisedGraph, {
+      fix: true,
+      silent,
+      logger: {
+        log: (...args: unknown[]) => {
+          logs.push(args.join(' '))
         }
       }
-    )
+    })
 
     if (!silent && logs.length > 0) {
       toastStore.add({
@@ -52,7 +49,7 @@ export function useWorkflowValidation() {
       }
     }
 
-    return linkValidation.graph as unknown as ComfyWorkflowJSON
+    return linkValidation.graph
   }
 
   /**
@@ -80,7 +77,9 @@ export function useWorkflowValidation() {
 
     if (validatedGraphData) {
       try {
-        validatedData = tryFixLinks(validatedGraphData, { silent })
+        validatedData = tryFixLinks(validatedGraphData, {
+          silent
+        }) as ComfyWorkflowJSON
       } catch (err) {
         // Link fixer itself is throwing an error
         console.error(err)