feat: major dashboard & waiter PWA overhaul

- Manager dashboard: replaced monolithic DashboardTab/OperationsPage with new
  DashboardPage; added OrderDetailModal, ShiftDetailModal, DeleteConfirmModal,
  PaymentMethodModal; updated Sidebar routing and App navigation
- Reports: reworked WorkDaySummary, OrderHistory, ShiftsOverview with detail modals
- Backend routers: extended orders, reports, shifts, products, business_day endpoints;
  updated cloud_sync service
- Waiter PWA: refreshed app icons, improved ConnectionLostModal UX, updated
  TableCard, SSEContext, connectionStore; added useProductCache hook; vite config tweaks

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

local_backend/services/cloud_sync.py

@@ -76,7 +76,12 @@ def _compute_expiry_fields(expires_at_str: str | None) -> dict:
 
 
 def _get_local_ip() -> str | None:
-    """Best-effort detection of the machine's LAN IP address."""
+    """Best-effort detection of the host machine's LAN IP address.
+    When running inside Docker the socket trick returns the container/bridge IP,
+    so we honour HOST_IP if it is explicitly provided via the environment."""
+    import os
+    if host_ip := os.environ.get("HOST_IP", "").strip():
+        return host_ip
     try:
         with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as s:
             s.connect(("8.8.8.8", 80))