feat: give the console customer page a flat address to edit

The admin customer page collected an address (door no, street, suburb,
city, state, postcode, landmark, lat/lng) that the backend had nowhere to
store, so it was silently dropped on save. Add those fields flat onto
appcustomers, matching the reference console's shape, plus an applocationid
for zone scoping.

- GET /admin/customers: add ?applocationid= filter; emit firstname/lastname
  split and the address fields alongside the existing joined name.
- GET /admin/customers/summary (new): stat-tile counts (total/active/blocked)
  scoped like the list, so the client stops deriving them from the full page.
- PATCH /admin/customers/🆔 accept firstname/lastname directly (single name
  still splits as a fallback) and persist every address field; pointer fields
  so an omitted field is not confused with one cleared to empty.

Pagination and keyword search were already present. Additive, nullable
columns — AutoMigrate handles it, no data rewrite.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

constants/constants.go

@@ -2,20 +2,27 @@ package constants
 
 // Miler Availability Statuses
 const (
-	MilerOffline     = "Offline"
-	MilerAvailable   = "Available"
-	MilerAssigned    = "Assigned"
-	MilerOnPickup    = "On_Pickup"
-	MilerAtCustomer  = "At_Customer"
-	MilerPickedUp    = "Picked_Up"
-	MilerOnDelivery  = "On_Delivery"
-	MilerBreak       = "Break"
-	MilerBlocked     = "Blocked"
+	MilerOffline    = "Offline"
+	MilerAvailable  = "Available"
+	MilerAssigned   = "Assigned"
+	MilerOnPickup   = "On_Pickup"
+	MilerAtCustomer = "At_Customer"
+	MilerPickedUp   = "Picked_Up"
+	MilerOnDelivery = "On_Delivery"
+	MilerBreak      = "Break"
+	MilerBlocked    = "Blocked"
+)
+
+// App (B2C) Customer Statuses
+const (
+	CustomerStatusActive  = "Active"
+	CustomerStatusBlocked = "Blocked"
+	CustomerStatusDeleted = "Deleted"
 )
 
 // Booking Statuses
 const (
-	BookingPendingPickup        = "Pending_Pickup"          // customer requested pickup, delivery details not yet known
+	BookingPendingPickup        = "Pending_Pickup" // customer requested pickup, delivery details not yet known
 	BookingCreated              = "Created"
 	BookingMilerAssigned        = "Miler_Assigned"
 	BookingPickupScheduled      = "Pickup_Scheduled"
@@ -26,16 +33,16 @@ const (
 
 // Consignment Statuses
 const (
-	ConsignmentCreated           = "Created"
-	ConsignmentInwardedAtHub     = "Inwarded_at_Hub"
-	ConsignmentTripsheetLoaded   = "Tripsheet_Loaded"
-	ConsignmentInTransit         = "In_Transit"
-	ConsignmentOutForDelivery    = "Out_for_Delivery"
-	ConsignmentDelivered         = "Delivered"
-	ConsignmentRTOInitiated      = "RTO_Initiated"
-	ConsignmentReturnedToSender  = "Returned_to_Sender"
-	ConsignmentMissing           = "Missing"
-	ConsignmentDamaged           = "Damaged"
+	ConsignmentCreated          = "Created"
+	ConsignmentInwardedAtHub    = "Inwarded_at_Hub"
+	ConsignmentTripsheetLoaded  = "Tripsheet_Loaded"
+	ConsignmentInTransit        = "In_Transit"
+	ConsignmentOutForDelivery   = "Out_for_Delivery"
+	ConsignmentDelivered        = "Delivered"
+	ConsignmentRTOInitiated     = "RTO_Initiated"
+	ConsignmentReturnedToSender = "Returned_to_Sender"
+	ConsignmentMissing          = "Missing"
+	ConsignmentDamaged          = "Damaged"
 )
 
 // Payment Modes
@@ -93,8 +100,8 @@ const (
 
 // Exception Statuses
 const (
-	ExceptionOpen              = "Open"
+	ExceptionOpen               = "Open"
 	ExceptionUnderInvestigation = "Under_Investigation"
-	ExceptionResolved          = "Resolved"
-	ExceptionClosed            = "Closed"
+	ExceptionResolved           = "Resolved"
+	ExceptionClosed             = "Closed"
 )