docs(01-01): complete design token foundation plan

- Add 01-01-SUMMARY.md with full task record and decisions
- Update STATE.md with progress, decisions, and session info (50% phase complete)
- Update ROADMAP.md plan progress (phase 1: 1/2 plans done)
- Mark DSGN-01, DSGN-02, DSGN-05 requirements complete

.planning/config.json

@@ -8,6 +8,7 @@
     "research": true,
     "plan_check": true,
     "verifier": true,
-    "nyquist_validation": true
+    "nyquist_validation": true,
+    "_auto_chain_active": false
   }
-}
+}