fix(dashboard): pin Overview as first nav entry

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

state-hub/dashboard/observablehq.config.js

@@ -17,12 +17,12 @@ export default {
   root: "src",
   title: "Custodian State Hub",
   pages: [
-    // ── Pages (alphabetical) ──────────────────────────────────────────────────
+    // ── Pages (Overview first, then alphabetical) ────────────────────────────
+    { name: "Overview",      path: "/" },
     { name: "Contributions", path: "/contributions" },
     { name: "Domains",       path: "/domains" },
     { name: "Goals",         path: "/goals" },
     { name: "Inbox",         path: "/inbox" },
-    { name: "Overview",      path: "/" },
     { name: "Progress",      path: "/progress" },
     { name: "Todo",          path: "/todo" },
     // ── Sections (alphabetical) ───────────────────────────────────────────────