Fix admin SPA route resolution

Support admin views from both hash-based URLs and path-based URLs.

Add compatibility aliases such as activities -> activity to avoid falling back to the dashboard overview.

apps/admin/site/app.js

@@ -92,10 +92,37 @@ document.getElementById("logout-btn").addEventListener("click", async () => {
 // Router — 5 onglets : Vue d'ensemble, Groupes, Activité, Actions, LLM
 // ------------------------------------------------------------------
 const VIEWS = ["dashboard", "bands", "activity", "actions", "llm"];
+const VIEW_ALIASES = {
+  "": "dashboard",
+  dashboard: "dashboard",
+  overview: "dashboard",
+  bands: "bands",
+  band: "bands",
+  activity: "activity",
+  activities: "activity",
+  activite: "activity",
+  activites: "activity",
+  actions: "actions",
+  action: "actions",
+  llm: "llm",
+};
+
+function normalizeView(raw) {
+  const key = String(raw || "").trim().toLowerCase().replace(/^\/+|\/+$/g, "");
+  const normalized = VIEW_ALIASES[key];
+  return VIEWS.includes(normalized) ? normalized : "dashboard";
+}
+
+function currentViewFromLocation() {
+  const hashView = normalizeView((location.hash || "").replace(/^#\/?/, ""));
+  if (location.hash) return hashView;
+
+  const pathParts = location.pathname.split("/").filter(Boolean);
+  return normalizeView(pathParts[0] || "");
+}
 
 function router() {
-  const hash = (location.hash || "#/dashboard").replace("#/", "");
-  const view = VIEWS.includes(hash) ? hash : "dashboard";
+  const view = currentViewFromLocation();
   state.view = view;
   document.querySelectorAll(".nav a").forEach((a) => {
     a.classList.toggle("active", a.dataset.view === view);