chore(deps): bump sanity to 6.5.0 and enable unstable_bundledDev (#1589)

* chore(deps): bump sanity to 6.5.0 and enable bundledDev

Align @sanity/client (7.23.2) and @sanity/eventsource (5.0.4) so
unstable_bundledDev can be enabled without EventSource2 crashes in Structure.

* chore(markdown): sync inlined @sanity/client to 7.23.2

* chore(deps): drop client/eventsource overrides after lockfile bump

Keep @sanity/client@7.23.2 and @sanity/eventsource@5.0.4 via the
lockfile after pnpm dedupe; remove the temporary overrides and markdown
changeset.

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>

Author: stipsan

dev/test-studio/sanity.cli.ts

@@ -16,6 +16,8 @@ export default defineCliConfig({
   deployment: {appId, autoUpdates: true},
   reactCompiler: {},
   typegen: {formatGeneratedCode: false},
+  // Bundle studio deps in `sanity dev` (required for Structure with client/eventsource alignment).
+  unstable_bundledDev: true,
   vite: {
     plugins: [vanillaExtractPlugin(), ...(isViteDevToolsEnabled ? [DevTools()] : [])],
     // `devtools: {}` makes `sanity build` emit a Rolldown build session that the DevTools dock can inspect

plugins/sanity-plugin-markdown/package.json

@@ -68,7 +68,7 @@
     "node": ">=20.19 <22 || >=22.12"
   },
   "inlinedDependencies": {
-    "@sanity/client": "7.23.0",
+    "@sanity/client": "7.23.2",
     "rxjs": "7.8.2"
   }
 }