fix: address ask-user findings from review

- Move unit loading to use real /api/tickets/units endpoint
- Match unit code format to backend seed (0101E style)
- Send unit_id in create ticket payload
- Fix tech IDs to match seed order (9-15 for Prosper-Afful)
- Add customer_name and phone fields to TicketCreate schema
- Map form customer_name/phone into API payload

app/schemas/ticket.py

@@ -8,6 +8,17 @@ from decimal import Decimal
 from pydantic import BaseModel, Field
 
 
+# ── Unit ─────────────────────────────────────────────────────────────
+class UnitOut(BaseModel):
+    id: int
+    property: str
+    apartment_code: str
+    building: str | None = None
+    floor: int | None = None
+
+    model_config = {"from_attributes": True}
+
+
 # ── Category ─────────────────────────────────────────────────────────
 class CategoryOut(BaseModel):
     id: int
@@ -32,6 +43,8 @@ class TicketCreate(BaseModel):
     reported_via: str | None = None  # whatsapp, phone, walk-in, qr, agent
     description: str | None = None
     assigned_to: int | None = None
+    customer_name: str | None = None
+    phone: str | None = None
 
 
 class TicketUpdate(BaseModel):