feat: dashboard tickets+invoices, collect screen overhaul, client detail tickets tab + pay invoice + map
- Dashboard: active tickets (unassigned + assigned to me, top 10), top 10 unpaid invoices by due date, revenue hidden for TECHNICIAN/COLLECTOR
- Collect screen: unpaid invoices sorted overdue-first, remittance button at top, navigate button (Google Maps/Waze)
- Client Detail: added Tickets tab, removed Payments tab, Invoices tab has pay button per invoice + status tags + ordered by issuedDate
- Client Profile tab: map view + navigate button using client lat/lng
- Installed react-native-maps
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