fix(role): default the lookup field to the user's own address; 'AAStar'→'Mycelium' ecosystem (#411)

Role page bug: the Query button did nothing because the lookup field starts empty and
queryRole() returns on empty — but users expect it defaulted to their own address. Now
loadData prefills queryAddress with the user's account (roleRes.data.address) when the
field is empty, so Query works out of the box and can still be changed to look up any
address. Also: role page subtitle 'AAStar ecosystem' → 'Mycelium ecosystem' (zh + en),
matching the Mycelium Protocol framing.

tsc + lint + i18n parity (766 keys) green.

Author: jhfnetboy

aastar-frontend/app/role/page.tsx

@@ -93,7 +93,12 @@ export default function RolePage() {
         registryAPI.getRole().catch(() => null),
         registryAPI.getInfo(),
       ]);
-      if (roleRes) setRoleInfo(roleRes.data);
+      if (roleRes) {
+        setRoleInfo(roleRes.data);
+        // Default the lookup field to the user's own account so the Query button works
+        // out of the box (the field looks up ANY address; empty = no-op = "no response").
+        setQueryAddress(prev => prev || roleRes.data.address || "");
+      }
       setRegistryInfo(infoRes.data);
     } catch {
       toast.error(t("rolePage.loadError"));

aastar-frontend/lib/i18n/locales/en.json

@@ -633,7 +633,7 @@
   },
   "rolePage": {
     "title": "Role Portal",
-    "subtitle": "View your role in the AAStar ecosystem and navigate to role-specific dashboards",
+    "subtitle": "View your role in the Mycelium ecosystem and navigate to role-specific dashboards",
     "registryOverview": "Registry Overview (Sepolia)",
     "communityAdmins": "Community Admins",
     "spoOperators": "SPO Operators",

aastar-frontend/lib/i18n/locales/zh.json

@@ -633,7 +633,7 @@
   },
   "rolePage": {
     "title": "角色门户",
-    "subtitle": "查看您在 AAStar 生态中的角色，并进入相应的角色仪表盘",
+    "subtitle": "查看您在 Mycelium 生态中的角色，并进入相应的角色仪表盘",
     "registryOverview": "注册表概览 (Sepolia)",
     "communityAdmins": "社区管理员",
     "spoOperators": "SPO 运营商",