Reorganize sidebar navigation with Analytics category

- Add new Analytics section at top with Dashboard and Payments
- Reorder Manage section: Scheduler, Resources, Staff, Customers,
  Media Gallery, Contracts, Time Blocks
- Remove Money section (Payments moved to Analytics)
- Keep staff-only items (My Schedule, My Availability) in separate section

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/i18n/locales/en.json

@@ -157,9 +157,9 @@
     "timeBlocks": "Time Blocks",
     "helpDocs": "Help & Docs",
     "sections": {
+      "analytics": "Analytics",
       "manage": "Manage",
       "communicate": "Communicate",
-      "money": "Money",
       "extend": "Extend"
     }
   },