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>

scripts/test-ai-flow.ts

@@ -144,11 +144,12 @@ async function main() {
     const doctorsData = await gql(`{ doctors(first: 10) { edges { node {
         id name fullName { firstName lastName }
         department specialty qualifications yearsOfExperience
-        branchClinic visitingHours
+        visitingHours
         consultationFeeNew { amountMicros currencyCode }
         consultationFeeFollowUp { amountMicros currencyCode }
         active registrationNumber
         portalUserId
+        clinic { id clinicName }
     } } } }`);
     const doctors = doctorsData.doctors.edges.map((e: any) => e.node);
     assert(doctors.length === 5, `Found ${doctors.length} doctors`);
@@ -208,7 +209,7 @@ async function main() {
     console.log(`  AI Summary: ${matchedLead?.aiSummary}`);
     console.log(`  Suggested Action: ${matchedLead?.aiSuggestedAction}`);
     console.log(`  Doctor: Dr. Patel — ${drPatel?.specialty}`);
-    console.log(`  Next Appointment: ${drPatel?.visitingHours} at ${drPatel?.branchClinic}`);
+    console.log(`  Next Appointment: ${drPatel?.visitingHours} at ${drPatel?.clinic?.clinicName ?? 'N/A'}`);
     console.log(`  Fee: ₹${(drPatel?.consultationFeeNew?.amountMicros ?? 0) / 1_000_000} (new) / ₹${(drPatel?.consultationFeeFollowUp?.amountMicros ?? 0) / 1_000_000} (follow-up)`);
 
     // ═══════════════════════════════════════