perf: project-wide optimization pass + UI/theme fixes

Optimization (audited across src/, typecheck green):
- Crash guards: PurchaseAuction data?.result + stray text-node, AuctionItemDetail
  length>0, LiveAuction user?.contractorId, KYC params guard
- Hoisted render-defined components: Login MinimalInput (keyboard-focus bug),
  TenderFullDetail Section/InfoBox (subtree remount)
- Memoized hot paths: Spreadsheet ColumnHeaderRow/DataRow, list makeStyles,
  shared infinite-query select (stops per-render flatMap)
- Removed hot-path/in-list console logs; SkeletonList 10->1 shimmer

UI/theme: themed AppToast, redesigned sidebar drawer, list empty states,
KYC WebView cleanup

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package.json

@@ -22,16 +22,16 @@
     "@react-navigation/native-stack": "^7.17.3",
     "@react-navigation/stack": "7.6.13",
     "@reduxjs/toolkit": "2.11.2",
+    "@shopify/flash-list": "^1.7.6",
     "@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": "^3.4.0",
     "formik": "2.4.9",
     "hyperformula": "^2.7.1",
     "jsencrypt": "^3.5.4",
@@ -40,7 +40,6 @@
     "moment": "2.30.1",
     "react": "19.0.0",
     "react-native": "0.79.0",
-    "react-native-alert-notification": "0.4.2",
     "react-native-app-intro-slider": "4.0.4",
     "react-native-blob-util": "0.24.6",
     "react-native-bouncy-checkbox": "4.1.2",