fix(files): scope the single-file picker, and restore the v2 route

Three fixes from the AI reviewers on #7377.

The single-file picker kept its unscoped options when the folder changed:
singleFileOptions read scopedWorkspaceFiles but listed workspaceFiles in its
memo dependencies, so it never recomputed. That is the picker Append uses, so
the folder narrowing I added for it did nothing after the first render.

The v2 files-folders route called toWorkspaceFileFolderPathView while importing
staging's toV2Folder — a conflict resolution I got half right, and a compile
error I would have found by running the type-check I skipped. The file is back
to staging's version, since keeping its projection was the decision anyway.

fileFamilyInput took Record<string, any>, which the repo's TypeScript rules
forbid. It now takes an interface naming the three fields it actually reads, so
a shape change fails at the call site rather than at run time.

Author: mzxchandra

apps/sim/app/api/v2/files/folders/route.ts

@@ -32,10 +32,7 @@ export const GET = defineV2JsonRoute({
     sortOrder: query.sortOrder,
   }),
   useCase: listWorkspaceFileFoldersOperation,
-  present: ({ folders }) => ({
-    data: folders.map(toWorkspaceFileFolderPathView),
-    nextCursor: null,
-  }),
+  present: ({ folders }) => ({ data: folders.map(toV2Folder), nextCursor: null }),
 })
 
 export const POST = defineV2JsonRoute({
@@ -46,7 +43,7 @@ export const POST = defineV2JsonRoute({
   errorPolicy: v2FileErrorPolicies.default,
   mapInput: ({ body }) => ({ workspaceId: body.workspaceId, path: body.path }),
   useCase: createWorkspaceFileFolderOperation,
-  present: ({ folder }) => ({ data: toWorkspaceFileFolderPathView(folder) }),
+  present: ({ folder }) => ({ data: toV2Folder(folder) }),
 })
 
 export const PATCH = defineV2JsonRoute({
@@ -61,7 +58,7 @@ export const PATCH = defineV2JsonRoute({
     destinationPath: body.destinationPath,
   }),
   useCase: updateWorkspaceFileFolderOperation,
-  present: ({ folder }) => ({ data: toWorkspaceFileFolderPathView(folder) }),
+  present: ({ folder }) => ({ data: toV2Folder(folder) }),
 })
 
 export const DELETE = defineV2JsonRoute({

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/components/file-upload/file-upload.tsx

@@ -735,7 +735,7 @@ export function FileUpload({
         }
       }),
     ],
-    [workspaceFiles, acceptedTypes, cloudUploadBlocked]
+    [scopedWorkspaceFiles, acceptedTypes, cloudUploadBlocked]
   )
 
   // Find the selected file's workspace ID for highlighting in single file mode

apps/sim/blocks/blocks/file.ts

@@ -135,6 +135,13 @@ function toFileIdList(value: string | string[] | null | undefined): string[] {
   return Array.isArray(value) ? value : [value]
 }
 
+/** Only the fields {@link fileFamilyInput} reads, so a shape change fails here rather than at run time. */
+interface FileFamilyParams {
+  folderScopeRef?: unknown
+  folderIncludeSubfolders?: unknown
+  _context?: { workspaceId?: string }
+}
+
 /**
  * What read, get content, and compress send: the files picked, the folder they
  * were picked from, or the folder alone.
@@ -146,7 +153,7 @@ function toFileIdList(value: string | string[] | null | undefined): string[] {
  * the ids it covers today.
  */
 function fileFamilyInput(
-  params: Record<string, any>,
+  params: FileFamilyParams,
   label: string,
   pickerValue: unknown
 ): Record<string, unknown> {