fix(admin): absolute sidebar nav links so /admin URLs don't accumulate (v0.52.2)

The /admin left-rail NavLinks used relative targets (to="users", etc.). Under
the /admin/* nested route a relative link resolves against the current URL, so
each click appended a segment — Users→Allowlist→Graduation yielded
/admin/users/allowlist/graduation instead of /admin/graduation. Use absolute
targets (/admin/<tab>) + `end` for exact active matching.

Patch 0.52.1 → 0.52.2; CHANGELOG updated. Caught by the operator on PPE.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

testing/seed-ppe.sh

@@ -103,6 +103,17 @@ put_file() {
     201 "create $_repo/$_path"
 }
 
+# delete_file <repo> <path> — remove the file if it exists (no-op if absent).
+delete_file() {
+  _repo="$1"; _path="$2"
+  _sha=$(file_sha "$_repo" "$_path")
+  [ -n "$_sha" ] || { echo "seed-ppe: $_repo/$_path absent, nothing to delete"; return 0; }
+  echo "seed-ppe: deleting $_repo/$_path"
+  mutate DELETE "$GITEA/api/v1/repos/$ORG/$_repo/contents/$_path" \
+    "{\"message\":\"reseed: drop sidecar $_path\",\"sha\":\"$_sha\",\"branch\":\"main\"}" \
+    200 "delete $_repo/$_path"
+}
+
 ensure_repo "$REGISTRY_REPO"
 ensure_repo "$CONTENT_REPO"
 
@@ -182,4 +193,17 @@ tags: [search]
 Faceted search scenario.
 " "$RESEED"
 
+# RESEED also drops any metadata sidecars (<slug>.meta.yaml) left by prior
+# SLICE-4/5 edits. A sidecar takes precedence over the .md frontmatter
+# (dual-read, §22.4a), so without this a re-run inherits the edited
+# priorities (everything ends up P1) and the faceted preconditions drift —
+# SLICE-3 expects P0 count = 2. Dropping the sidecars restores the
+# frontmatter as the source of truth: checkout-guest=P0, search-facets=P0,
+# checkout-returning=P1.
+if [ "$RESEED" = "1" ]; then
+  for _slug in checkout-guest checkout-returning search-facets; do
+    delete_file "$CONTENT_REPO" "bdd/rfcs/$_slug.meta.yaml"
+  done
+fi
+
 echo "seed-ppe: done. Set REGISTRY_REPO=$REGISTRY_REPO on rfc-app-ppe and redeploy."