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>

src/Screens/Tender/PurchaseTenderAllList.tsx

@@ -1,13 +1,13 @@
-import React, { useState, useCallback, memo, useEffect } from 'react';
-import { View, Text, StyleSheet, FlatList, RefreshControl, ActivityIndicator } from 'react-native';
+import React, { useState, useCallback, useEffect } from 'react';
+import { View, Text, FlatList, ActivityIndicator } from 'react-native';
 import { useNavigation } from '@react-navigation/native';
 import moment from 'moment';
 import { useFetchPurchaseTender } from '../../Services/ApiCall/Hooks';
 import PurchaseTenderTile from './PurchaseTenderTile';
 import { useDispatch } from 'react-redux';
 import { setTender } from '../../Redux/Slices/SelectedTender';
-import { SearchInput } from '../../Component/Serach/SeacrhInput';
-import { Skelton } from '../../Component/Index';
+import { SearchInput } from '../../components/SearchInput';
+import { Skeleton } from '../../components';
 import { allBooleanProps } from './types/types';
 import FilterModal from './Modal/FilterModal';
 import colors from '../../Constant/Color';
@@ -59,6 +59,8 @@ const PurchaseTenderAllList = () => {
         if (hasNextPage && !isFetchingNextPage) {
             fetchNextPage();
         }
+    // fetchNextPage identity changes each render; gating flags are the real deps.
+    // eslint-disable-next-line react-hooks/exhaustive-deps
     }, [hasNextPage, isFetchingNextPage]);
 
 
@@ -111,13 +113,13 @@ const PurchaseTenderAllList = () => {
                     </Text>
                 </Animated.View>
             )}
-            {isLoading ? <Skelton />
+            {isLoading ? <Skeleton />
                 : <FlatList
                     data={data?.result ?? []}
                     keyExtractor={(item) => String(item.tenderId || item.id)}
                     showsVerticalScrollIndicator={false}
                     contentContainerStyle={{ paddingBottom: 200, paddingHorizontal: 10 }}
-                    renderItem={({ item, index }) => (
+                    renderItem={({ item }) => (
                         <PurchaseTenderTile
                             item={item}
                             onPressDetails={() => {