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-manager.ts

@@ -0,0 +1,58 @@
+import { SIPClient } from '@/lib/sip-client';
+import type { SIPConfig, ConnectionStatus, CallState } from '@/types/sip';
+
+// Singleton SIP client — survives React StrictMode remounts
+let sipClient: SIPClient | null = null;
+let connected = false;
+
+type StateUpdater = {
+    setConnectionStatus: (status: ConnectionStatus) => void;
+    setCallState: (state: CallState) => void;
+    setCallerNumber: (number: string | null) => void;
+};
+
+let stateUpdater: StateUpdater | null = null;
+
+export function registerSipStateUpdater(updater: StateUpdater) {
+    stateUpdater = updater;
+}
+
+export function connectSip(config: SIPConfig): void {
+    if (connected || sipClient?.isRegistered() || sipClient?.isConnected()) {
+        return;
+    }
+
+    if (!config.wsServer || !config.uri) {
+        console.warn('SIP config incomplete — wsServer and uri required');
+        return;
+    }
+
+    if (sipClient) {
+        sipClient.disconnect();
+    }
+
+    connected = true;
+    stateUpdater?.setConnectionStatus('connecting');
+
+    sipClient = new SIPClient(
+        config,
+        (status) => stateUpdater?.setConnectionStatus(status),
+        (state, number) => {
+            stateUpdater?.setCallState(state);
+            if (number !== undefined) stateUpdater?.setCallerNumber(number ?? null);
+        },
+    );
+
+    sipClient.connect();
+}
+
+export function disconnectSip(): void {
+    sipClient?.disconnect();
+    sipClient = null;
+    connected = false;
+    stateUpdater?.setConnectionStatus('disconnected');
+}
+
+export function getSipClient(): SIPClient | null {
+    return sipClient;
+}