feat: architecture refactor — core layer, spreadsheet engine, envelope bidding, tests

- Add src/core/ (config, errors, events, http, observability, storage, query)
- Add src/Spreadsheet/ engine with native POI backend and Excel bridge
- Add Envelope C spreadsheet flow and tender bidding envelope modules
- Consolidate components into src/components/, remove legacy Component/ and Hooks/
- Add registration state/validation, auth session guard, profile edit modules
- Add unit tests across axios, redux, bidding, registration, encryption, core
- Add CI workflow, docs (architecture, audit, DSC API spec), keystore example
- Remove tracked keystore binary; ignore scripts.zip

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

package.json

@@ -24,14 +24,17 @@
     "@reduxjs/toolkit": "2.11.2",
     "@stomp/stompjs": "7.2.1",
     "@tanstack/react-query": "5.90.12",
+    "@shopify/flash-list": "^1.7.6",
     "axios": "1.13.2",
     "buffer": "6.0.3",
     "crypto-js": "^4.2.0",
+    "exceljs": "^3.4.0",
     "eslint-config-prettier": "10.1.8",
     "eslint-plugin-react": "7.37.5",
     "eslint-plugin-react-native": "5.0.0",
-    "exceljs": "4.4.0",
     "formik": "2.4.9",
+    "hyperformula": "^2.7.1",
+    "jsencrypt": "^3.5.4",
     "lottie-react-native": "7.3.4",
     "lucide-react-native": "0.562.0",
     "moment": "2.30.1",
@@ -50,6 +53,7 @@
     "react-native-get-random-values": "1.11.0",
     "react-native-gifted-charts": "1.4.70",
     "react-native-haptic-feedback": "2.3.3",
+    "react-native-keychain": "^10.0.0",
     "react-native-linear-gradient": "^2.8.3",
     "react-native-modal": "^14.0.0-rc.1",
     "react-native-permissions": "5.4.4",
@@ -86,9 +90,9 @@
     "@types/react-test-renderer": "19.0.0",
     "@types/sockjs-client": "1.5.4",
     "@types/text-encoding": "0.0.40",
+    "babel-plugin-transform-remove-console": "^6.9.4",
     "eslint": "^8.57.0",
     "jest": "29.6.3",
-    "jsencrypt": "^3.5.4",
     "prettier": "2.8.8",
     "react-native-bundle-visualizer": "3.1.3",
     "react-test-renderer": "19.0.0",