feat(rbac): hide unauthorized menu sections and enforce route guards

backend/tests/fixtures/profile/fixtures_profile_filter.json

@@ -0,0 +1,26 @@
+{
+  "valid_profile_update": {
+    "user_id": "u-1",
+    "superset_username": "John_Doe",
+    "show_only_my_dashboards": true
+  },
+  "get_my_preference_ok": {
+    "auth_user": "u-1",
+    "expected_status": 200
+  },
+  "profile_filter_applied": {
+    "apply_profile_default": true,
+    "override_show_all": false
+  },
+  "enable_without_username": {
+    "superset_username": "",
+    "show_only_my_dashboards": true
+  },
+  "cross_user_mutation": {
+    "auth_user": "u-1",
+    "target_user": "u-2"
+  },
+  "lookup_env_not_found": {
+    "environment_id": "missing-env"
+  }
+}