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>

package.json

@@ -21,6 +21,7 @@
         "@untitledui/file-icons": "^0.0.8",
         "@untitledui/icons": "^0.0.21",
         "input-otp": "^1.4.2",
+        "jotai": "^2.18.1",
         "jssip": "^3.13.6",
         "motion": "^12.29.0",
         "qr-code-styling": "^1.9.2",