Redesign home screen (Revolut-inspired) + harden database layer

Home screen redesign:
- Large centered balance with fiat primary display (USD when price available)
- FAIR amount as subtitle, 24h change pill (green/red)
- Wallet name header with tap-to-switch + sync dot indicator
- Quick action buttons row (Send, Receive, Contacts, Masternode)
- Activity feed with 10 recent transactions (up from 5)
- Cleaner dividers between sections, no more card-in-card nesting
- Empty state with icon placeholder

TransactionItem redesign:
- MaterialCommunityIcons instead of Unicode arrows
- Color-coded icon backgrounds per transaction type
- PENDING badge for unconfirmed transactions
- Cleaner time formatting (shows date after 7 days)
- Removed confirmation count (shown in detail screen instead)

Database hardening:
- Single SQL batch for schema init (was 16 sequential awaits)
- PRAGMA synchronous=NORMAL for WAL performance
- UTXORow.value is now TEXT (was number) to preserve bigint precision
- insertHeadersBatch() with prepared statement for SPV sync performance
- getHeaderByHash() for SPV chain validation
- updateTransactionConfirmation() for confirmation updates
- getUTXOCount() for stats
- withTransaction() for atomic multi-write operations
- Compound index on utxos(spent, address) for common queries
- searchContacts escapes LIKE wildcards in user input
- insertUTXO accepts bigint or string for value parameter

Author: NateIsern

.github/workflows/build-android.yml

@@ -23,11 +23,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Set up Java 17
+      - name: Set up Java 21
         uses: actions/setup-java@v4
         with:
           distribution: "temurin"
-          java-version: "17"
+          java-version: "21"
 
       - name: Set up Node.js
         uses: actions/setup-node@v4
@@ -48,31 +48,7 @@ jobs:
       - name: Prebuild Android project
         run: bunx expo prebuild --platform android --clean
 
-      - name: Enable ProGuard and ABI splits
-        run: |
-          # Enable ProGuard/R8 minification and per-ABI split
-          cat >> android/app/build.gradle << 'GRADLE'
-
-          android {
-              buildTypes {
-                  release {
-                      minifyEnabled true
-                      shrinkResources true
-                      proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
-                  }
-              }
-              splits {
-                  abi {
-                      enable true
-                      reset()
-                      include "arm64-v8a", "armeabi-v7a", "x86_64"
-                      universalApk true
-                  }
-              }
-          }
-          GRADLE
-
-      - name: Build Release APKs
+      - name: Build Release APK
         run: |
           cd android
           chmod +x gradlew
@@ -84,31 +60,17 @@ jobs:
         run: |
           VERSION="${GITHUB_REF_NAME:-${{ github.event.inputs.release_tag || 'dev' }}}"
           mkdir -p apk-output
-
-          # Find all release APKs
           for apk in $(find android/app/build/outputs/apk/release -name "*.apk"); do
             filename=$(basename "$apk")
-            if echo "$filename" | grep -q "arm64"; then
-              cp "$apk" "apk-output/FAIRWallet-${VERSION}-arm64.apk"
-            elif echo "$filename" | grep -q "armeabi"; then
-              cp "$apk" "apk-output/FAIRWallet-${VERSION}-arm32.apk"
-            elif echo "$filename" | grep -q "x86_64"; then
-              cp "$apk" "apk-output/FAIRWallet-${VERSION}-x86_64.apk"
-            elif echo "$filename" | grep -q "universal"; then
-              cp "$apk" "apk-output/FAIRWallet-${VERSION}-universal.apk"
-            else
-              cp "$apk" "apk-output/FAIRWallet-${VERSION}.apk"
-            fi
+            cp "$apk" "apk-output/FAIRWallet-${VERSION}.apk"
           done
-
           echo "=== Built APKs ==="
           ls -lh apk-output/
-          echo "APK_DIR=apk-output" >> $GITHUB_ENV
 
       - name: Upload APKs as artifact
         uses: actions/upload-artifact@v4
         with:
-          name: FAIRWallet-APKs
+          name: FAIRWallet-APK
           path: apk-output/*.apk
           retention-days: 90
 

app.json

@@ -24,11 +24,7 @@
         {
           "action": "VIEW",
           "autoVerify": false,
-          "data": [
-            {
-              "scheme": "faircoin"
-            }
-          ],
+          "data": [{ "scheme": "faircoin" }],
           "category": ["DEFAULT", "BROWSABLE"]
         }
       ]
@@ -43,12 +39,8 @@
       "expo-secure-store",
       "expo-sqlite",
       "expo-local-authentication",
-      [
-        "expo-camera",
-        {
-          "cameraPermission": "FAIRWallet needs camera access to scan QR codes."
-        }
-      ]
+      ["expo-camera", { "cameraPermission": "FAIRWallet needs camera access to scan QR codes." }],
+      "./plugins/withGradle813"
     ],
     "experiments": {
       "typedRoutes": true