fix: pnpm related dependency bugs - nothing funcitonal (#6094)

Testing this needs a release and there are no functional changes, only pnpm migration issues, so merging early for test.

* fix: pnpm related dependency bugs - nothing funcitonal

* Undo peer dependency due to non-pnpm integration issues

platform/docs/package.json

@@ -84,6 +84,10 @@
     "typescript": "5.5.4",
     "url-loader": "4.1.1"
   },
+  "devDependencies": {
+    "@ohif/core": "workspace:*",
+    "@ohif/ui-next": "workspace:*"
+  },
   "browserslist": {
     "production": [
       ">0.5%",

platform/ui-next/src/contextProviders/ViewportGridProvider.tsx

@@ -9,6 +9,17 @@ import React, {
 import merge from 'lodash.merge';
 
 import PropTypes from 'prop-types';
+// NOTE: `@ohif/core` is intentionally NOT declared in this package's
+// package.json (neither as a dependency nor a peerDependency). It is treated as
+// an implicit peer, satisfied by the consuming application via the monorepo
+// workspace. Declaring it as `"@ohif/core": "workspace:*"` was tried and
+// reverted: the release/publish process does not rewrite `workspace:*` ranges
+// inside `peerDependencies`, so the published tarball shipped a literal
+// `workspace:*` peer that non-pnpm package managers (npm/yarn) cannot resolve.
+// A plain `"*"` range would be an acceptable workaround if we ever want it
+// declared, but for now it stays undeclared. Note: the docs site (platform/docs)
+// must therefore add `@ohif/core` as a devDependency itself, because pulling in
+// the ui-next barrel reaches this module and nothing else anchors the import.
 import { ViewportGridService, utils } from '@ohif/core';
 
 const DEFAULT_STATE: AppTypes.ViewportGrid.State = {