docs(rfc): advance RFC-0003 to stable

Author: lucifer1004

gov/rfc/RFC-0003/rfc.json

@@ -3,14 +3,18 @@
   "title": "TUI UX improvements",
   "version": "0.1.0",
   "status": "normative",
-  "phase": "test",
-  "owners": ["@govctl-org"],
+  "phase": "stable",
+  "owners": [
+    "@govctl-org"
+  ],
   "created": "2026-02-07",
   "updated": "2026-02-07",
   "sections": [
     {
       "title": "Summary",
-      "clauses": ["clauses/C-SUM.json"]
+      "clauses": [
+        "clauses/C-SUM.json"
+      ]
     },
     {
       "title": "Specification",
@@ -28,4 +32,4 @@
       "notes": "Initial draft"
     }
   ]
-}
+}