feat: major UI/UX overhaul + user management + ticket detail refactor

- 5-tab navigation (Home/Clients/Collect/Tickets/Profile)
- Inline styles throughout (17px min font, SafeAreaView)
- Dashboard fixed to match real API shape
- Ticket detail: 2 tabs (Details + Comments), always-visible comment input
- Installation confirmation: GPS coordinate capture + client location update
- User management screens (Admin only): list, create, detail + role/active toggle
- Tasks folder replaces tickets folder
- Remittance detail: inline styles
- Record payment: prefill from client, live button text
- Icon component with SVG icons
- Color system: primary #0891B2

constants/index.ts

@@ -1,8 +1,8 @@
 export const API_URL = process.env.EXPO_PUBLIC_API_URL ?? 'http://192.168.1.167:3001';
 
 export const COLORS = {
-  primary: '#2563EB',
-  primaryDark: '#1D4ED8',
+  primary: '#0891B2',
+  primaryDark: '#0E7490',
   danger: '#DC2626',
   success: '#16A34A',
   warning: '#D97706',