feat(uat-p5): long-tail polish - tag chips, notes counts, hub context, tenancies toggle

- StageStepper renders now carry tag chips next to the progress bar
  (client interest cards, pipeline summary, preview sheet).
- Notes tab badge on the interest detail aggregates note counts across
  the interest, the linked client, the linked yacht, and any companies
  the client is an active member of - reps see the full surface area
  at a glance.
- Admin Settings: Tenancies Module toggle wired into the Feature Flags
  card. Disabling hides nav/tabs without deleting any rows; re-enabling
  brings them back. Service layer was already complete; this surfaces
  the control on the operations page.
- HubRoot recent-files rows now show folder breadcrumb + entity badge
  (Interest/Client/Yacht/Company) so reps can tell at a glance where a
  file lives. Backed by listFiles enrichment (5 batched lookups per
  page; no per-row queries).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/interests/interest-tabs.tsx

@@ -189,6 +189,10 @@ interface InterestTabsOptions {
     /** Surfaced by getInterestById for the Overview "most recent note"
      *  teaser - saves a click into the Notes tab to peek at the latest. */
     notesCount?: number;
+    /** Aggregated note count across linked entities (interest + client +
+     *  yacht + companies the client is a member of). Drives the badge
+     *  on the Notes tab so reps see the full surface area at a glance. */
+    notesCountAggregated?: number;
     recentNote?: {
       id: string;
       content: string;
@@ -1699,6 +1703,10 @@ export function getInterestTabs({
     {
       id: 'notes',
       label: 'Notes',
+      badge:
+        interest.notesCountAggregated && interest.notesCountAggregated > 0
+          ? interest.notesCountAggregated
+          : undefined,
       content: (
         <NotesList
           entityType="interests"