chore: upgrade react-router to 8.3.0

Patch/minor bump within the existing ^8 range. Includes the RFC 3986
path-segment encoding change, optional-segment param extraction fix and
route ranking fix for dynamic params with static suffixes.

Lockfile also picks up incidental transitive drift (acorn, fs-extra,
jsonfile, @jridgewell/trace-mapping) from re-resolution.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01K1tN6RYPVBX7FxxbnuqxC2

apps/client/package.json

@@ -30,7 +30,7 @@
     "react-fast-compare": "^3.2.2",
     "react-hook-form": "^7.80.0",
     "react-icons": "5.6.0",
-    "react-router": "^8.0.1",
+    "react-router": "^8.3.0",
     "react-virtuoso": "^4.18.7",
     "zustand": "^5.0.14"
   },