feat: wire frontend to platform data, migrate to Jotai + Vercel AI SDK

- Replace mock DataProvider with real GraphQL queries through sidecar
- Add queries.ts and transforms.ts for platform field name mapping
- Migrate SIP state from React Context to Jotai atoms (React 19 compat)
- Add singleton SIP manager to survive StrictMode remounts
- Remove hardcoded Olivia/Sienna accounts from nav menu
- Add password eye toggle, remember me checkbox, forgot password link
- Fix worklist hook to transform platform field names
- Add seed scripts for clinics, health packages, lab tests
- Update test harness for new doctor→clinic relation

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/state/sip-state.ts

@@ -0,0 +1,10 @@
+import { atom } from 'jotai';
+import type { ConnectionStatus, CallState } from '@/types/sip';
+
+export const sipConnectionStatusAtom = atom<ConnectionStatus>('disconnected');
+export const sipCallStateAtom = atom<CallState>('idle');
+export const sipCallerNumberAtom = atom<string | null>(null);
+export const sipIsMutedAtom = atom<boolean>(false);
+export const sipIsOnHoldAtom = atom<boolean>(false);
+export const sipCallDurationAtom = atom<number>(0);
+export const sipCallStartTimeAtom = atom<Date | null>(null);