0.2.3

.gitea/workflows/build-apk.yml

@@ -35,9 +35,3 @@ jobs:
         with:
           name: app-release
           path: app/build/outputs/apk/release/app-release.apk
-
-      - name: Upload APK
-        uses: actions/upload-artifact@v4
-        with:
-          name: app-release
-          path: app/build/outputs/apk/release/app-release.apk

.github/workflows/release-on-tag.yml

@@ -0,0 +1,68 @@
+name: Release APK on Tag
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  build-and-release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Build release APK
+        run: ./gradlew :app:assembleRelease --no-daemon --stacktrace
+
+      - name: Find APK
+        id: find_apk
+        run: |
+          set -e
+          APK=$(ls app/build/outputs/apk/release/*.apk | head -n1 || true)
+          if [ -z "$APK" ]; then
+            echo "No APK found in app/build/outputs/apk/release"
+            exit 1
+          fi
+          echo "APK_PATH=$APK" >> $GITHUB_ENV
+          echo "apk=$APK"
+
+      - name: Upload artifact (for debugging)
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-release-apk
+          path: ${{ env.APK_PATH }}
+
+      - name: Create GitHub Release
+        id: create_release
+        uses: actions/create-release@v1
+        with:
+          tag_name: ${{ github.ref_name }}
+          release_name: Release ${{ github.ref_name }}
+          body: Automated release for tag ${{ github.ref_name }}
+          draft: false
+          prerelease: false
+
+      - name: Upload APK to Release
+        uses: actions/upload-release-asset@v1
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ${{ env.APK_PATH }}
+          asset_name: app-release.apk
+          asset_content_type: application/vnd.android.package-archive

.idea/workspace.xml

@@ -4,14 +4,7 @@
     <option name="autoReloadType" value="NONE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="51538617-7e5b-4e71-9f47-7bda274cf4cc" name="Changes" comment="">
-      <change beforePath="$PROJECT_DIR$/.gradle/8.5/checksums/checksums.lock" beforeDir="false" afterPath="$PROJECT_DIR$/.gradle/8.5/checksums/checksums.lock" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.gradle/8.5/dependencies-accessors/dependencies-accessors.lock" beforeDir="false" afterPath="$PROJECT_DIR$/.gradle/8.5/dependencies-accessors/dependencies-accessors.lock" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.gradle/8.5/fileHashes/fileHashes.lock" beforeDir="false" afterPath="$PROJECT_DIR$/.gradle/8.5/fileHashes/fileHashes.lock" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.gradle/buildOutputCleanup/buildOutputCleanup.lock" beforeDir="false" afterPath="$PROJECT_DIR$/.gradle/buildOutputCleanup/buildOutputCleanup.lock" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/MainActivity.kt" beforeDir="false" afterPath="$PROJECT_DIR$/MainActivity.kt" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/app/build.gradle" beforeDir="false" afterPath="$PROJECT_DIR$/app/build.gradle" afterDir="false" />
-    </list>
+    <list default="true" id="51538617-7e5b-4e71-9f47-7bda274cf4cc" name="Changes" comment="" />
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />

README.md

@@ -13,3 +13,33 @@ Pliki
 Jak uruchomić
 
 Otwórz plik `index.html` w przeglądarce (najlepiej na urządzeniu mobilnym lub w trybie responsywnym).
+
+Signing a release APK/AAB
+------------------------
+
+Aby uniknąć ostrzeżeń "nieznany deweloper" lub instalatora na Androidzie, zbuduj podpisany pakiet APK lub AAB i zainstaluj go zamiast debugowego APK.
+
+1. Utwórz magazyn kluczy (jeśli go nie masz):
+
+```bash
+keytool -genkey -v -keystore my-release-key.jks -keyalg RSA -keysize 2048 -validity 10000 -alias my_key_alias
+```
+
+2. Skopiuj `gradle.properties.example` do swojego osobistego pliku `~/.gradle/gradle.properties` i uzupełnij wartości (nie commituj prawdziwych haseł do kontroli wersji).
+
+3. Zbuduj podpisany pakiet APK lub AAB:
+
+```bash
+./gradlew assembleRelease   # podpisany APK (jeśli podpisywanie jest skonfigurowane)
+./gradlew bundleRelease     # AAB do Sklepu Play
+```
+
+4. Zainstaluj APK za pomocą adb:
+
+```bash
+adb install -r app/build/outputs/apk/release/app-release.apk
+```
+
+Lub przesłać AAB do Google Play (testowanie wewnętrzne) — zalecane w celu najłatwiejszej dystrybucji.
+
+Jeśli chcesz tylko przetestować lokalnie i zobaczyć ostrzeżenie "Nieznane źródła", możesz tymczasowo włączyć instalowanie z nieznanych źródeł na urządzeniu, ale dystrybucja podpisanego wydania jest bezpieczniejszym podejściem.

app/build.gradle

@@ -14,10 +14,39 @@ android {
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
 
+    // Signing configuration for release builds.
+    // Configure the following properties in either your
+    // - ~/.gradle/gradle.properties (recommended for secrets), or
+    // - <project root>/gradle.properties (do NOT commit passwords)
+    //
+    // Example properties:
+    // MYAPP_STORE_FILE=keystores/my-release-key.jks
+    // MYAPP_STORE_PASSWORD=your_store_password
+    // MYAPP_KEY_ALIAS=my_key_alias
+    // MYAPP_KEY_PASSWORD=your_key_password
+    signingConfigs {
+        release {
+            // Only configure signing when the properties are provided.
+            if (project.hasProperty('MYAPP_STORE_FILE')) {
+                storeFile file(MYAPP_STORE_FILE)
+                storePassword MYAPP_STORE_PASSWORD
+                keyAlias MYAPP_KEY_ALIAS
+                keyPassword MYAPP_KEY_PASSWORD
+            }
+        }
+    }
+
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+            // Apply signing config if available. This keeps debug and CI builds
+            // working even when signing properties are absent locally.
+            if (project.hasProperty('MYAPP_STORE_FILE')) {
+                signingConfig signingConfigs.release
+            }
+            // Ensure release builds are not debuggable.
+            debuggable false
         }
     }
 

app/build/intermediates/assets/debug/js/app.js

@@ -55,19 +55,19 @@ const statusEl = document.getElementById('status');
 // load settings from localStorage
 function loadSettings(){
   try{
-  let progressInner = null
+    const raw = (typeof localStorage !== 'undefined') ? localStorage.getItem('matma:settings') : null
     if (raw) {
       const s = JSON.parse(raw)
       state.settings = Object.assign(state.settings, s)
     }
   }catch(e){ console.warn('settings load failed', e) }
-  // reflect to inputs
-  settingTimed.value = state.settings.timedSeconds
-  settingMaxResult.value = state.settings.maxResult
-  settingMaxOperand.value = state.settings.maxOperand
-  settingSessionProblems.value = state.settings.sessionProblems
-  settingAllowNegative.checked = !!state.settings.allowNegative
-  settingAllowFraction.checked = !!state.settings.allowFraction
+  // reflect to inputs (guard in case some inputs are missing)
+  if (settingTimed) settingTimed.value = state.settings.timedSeconds
+  if (settingMaxResult) settingMaxResult.value = state.settings.maxResult
+  if (settingMaxOperand) settingMaxOperand.value = state.settings.maxOperand
+  if (settingSessionProblems) settingSessionProblems.value = state.settings.sessionProblems
+  if (settingAllowNegative) settingAllowNegative.checked = !!state.settings.allowNegative
+  if (settingAllowFraction) settingAllowFraction.checked = !!state.settings.allowFraction
 }
 
 function saveSettings(){
@@ -145,16 +145,16 @@ function startPlay(){
   renderProblem()
 
   if (state.mode === 'timed'){
-    progressInner.style.width = '0%'
-    startTimer(state.settings.timedSeconds)
-    statusEl.textContent = 'Na czas';
-    timerEl.classList.remove('hidden');
+  if (progressInner) progressInner.style.width = '0%'
+  startTimer(state.settings.timedSeconds)
+  if (statusEl) statusEl.textContent = 'Na czas';
+  if (timerEl) timerEl.classList.remove('hidden');
   } else {
-    progressInner.style.width = '0%'
-    state.sessionSolved = 0
-    state.sessionTarget = Math.max(1, state.settings.sessionProblems)
-    updateProgress()
-    timerEl.classList.add('hidden');
+  if (progressInner) progressInner.style.width = '0%'
+  state.sessionSolved = 0
+  state.sessionTarget = Math.max(1, state.settings.sessionProblems)
+  updateProgress()
+  if (timerEl) timerEl.classList.add('hidden');
   }
 }
 
@@ -311,14 +311,14 @@ backspaceBtn.addEventListener('click', ()=>{
 
 function startTimer(seconds){
   state.timeLeft = seconds
-  timerEl.textContent = state.timeLeft
+  if (timerEl) timerEl.textContent = state.timeLeft
 
   stopTimer();
   state.timerId = setInterval(()=>{
     state.timeLeft -= 1
-    timerEl.textContent = state.timeLeft
+    if (timerEl) timerEl.textContent = state.timeLeft
     const pct = Math.max(0, (state.timeLeft / seconds) * 100)
-    progressInner.style.width = pct + '%'
+    if (progressInner) progressInner.style.width = pct + '%'
     if (state.timeLeft <= 0) {
       stopTimer()
       endSession()
@@ -357,9 +357,9 @@ summaryBack.addEventListener('click', ()=>{
 
 function updateProgress(){
   if (state.mode === 'training'){
-    const pct = Math.min(100, Math.round((state.sessionSolved/state.sessionTarget)*100))
-    progressInner.style.width = pct + '%'
-    statusEl.textContent = `${state.sessionSolved}/${state.sessionTarget}`
+  const pct = Math.min(100, Math.round((state.sessionSolved/state.sessionTarget)*100))
+  if (progressInner) progressInner.style.width = pct + '%'
+  if (statusEl) statusEl.textContent = `${state.sessionSolved}/${state.sessionTarget}`
   }
 }
 

app/build/intermediates/assets/debug/js/components.js

@@ -1,7 +1,20 @@
 // Komponenty HTML loader
 function loadComponent(path, replaceMap = {}) {
+  // If path is a full mapped origin used by WebViewAssetLoader, strip it to a relative path.
+  const mappedOrigin = 'https://appassets.androidplatform.net/assets/';
+  if (path.startsWith(mappedOrigin)) {
+    path = path.slice(mappedOrigin.length);
+  }
+
+  // If an absolute path starting with '/' is provided, remove leading slash to make it
+  // relative to the current document (works under local http server and WebViewAssetLoader).
+  if (path.startsWith('/')) path = path.slice(1);
+
   return fetch(path)
-    .then(r => r.text())
+    .then(r => {
+      if (!r.ok) throw new Error('Failed to load component: ' + path);
+      return r.text();
+    })
     .then(html => {
       Object.entries(replaceMap).forEach(([key, val]) => {
         html = html.replaceAll(key, val);

app/build/intermediates/assets/debug/js/czytanie.js

@@ -83,9 +83,8 @@
   }
 
   // ── Back to list ──────────────────────────────────────────────────────────
+  // Zakończ button: natychmiast wróć do listy bez potwierdzenia
   readBackBtn.addEventListener('click', () => {
-    const active = yOffset > 0 || autoTimer !== null
-    if (active && !confirm('Wrócić do listy tekstów?')) return
     clearInterval(autoTimer)
     autoTimer = null
     readWrap.classList.add('hidden')

app/build/intermediates/assets/debug/js/dyktando.js

@@ -296,9 +296,8 @@
   }
 
   // ── Navigation ────────────────────────────────────────────────────────────
+  // Zakończ button: natychmiast wracamy do listy bez potwierdzenia
   playBackBtn.addEventListener('click', () => {
-    const inProgress = blanks.length > 0 && current < blanks.length
-    if (inProgress && !confirm('Przerwać dyktando i wrócić do listy?')) return
     goToList()
   })
 

app/build/intermediates/assets/debug/js/dzielenie.js

@@ -136,7 +136,8 @@
     let sha = (window.COMMIT_SHA || '').toString().trim()
     if (!sha) {
       try {
-        const res = await fetch('/version.sha', { cache: 'no-cache' })
+  // use relative path so the request works under WebViewAssetLoader or a local server
+  const res = await fetch('version.sha', { cache: 'no-cache' })
         if (res.ok) {
           const txt = await res.text()
           const first = txt.split(/\r?\n/).find(l => l.trim().length > 0)

app/build/intermediates/assets/debug/js/mnozenie.js

@@ -136,7 +136,8 @@
     let sha = (window.COMMIT_SHA || '').toString().trim()
     if (!sha) {
       try {
-        const res = await fetch('/version.sha', { cache: 'no-cache' })
+  // use relative path so the request works under WebViewAssetLoader or a local server
+  const res = await fetch('version.sha', { cache: 'no-cache' })
         if (res.ok) {
           const txt = await res.text()
           const first = txt.split(/\r?\n/).find(l => l.trim().length > 0)

app/build/intermediates/assets/debug/js/nav.js

@@ -4,14 +4,10 @@
     const backBtn = document.getElementById('back-to-hub')
     if (!backBtn) return
 
+    // Immediately navigate back to hub/menu without confirmation
     backBtn.addEventListener('click', (e) => {
-      const playScreen = document.getElementById('play-screen')
-      const taskActive = playScreen && !playScreen.classList.contains('hidden')
-      if (taskActive) {
-        e.preventDefault()
-        const ok = confirm('Masz aktywne zadanie. Czy na pewno chcesz wyjść do menu?')
-        if (ok) window.location.href = backBtn.getAttribute('href')
-      }
+      const href = backBtn.getAttribute('href')
+      if (href) window.location.href = href
     })
   })
 })()

app/build/intermediates/incremental/packageDebug/tmp/debug/dex-renamer-state.txt

@@ -1,4 +1,4 @@
-#Wed May 27 14:04:13 CEST 2026
+#Wed May 27 14:53:22 CEST 2026
 base.2=/Users/aln/Work/Matma/app/build/intermediates/dex/debug/mergeProjectDexDebug/6/classes.dex
 path.2=6/classes.dex
 base.1=/Users/aln/Work/Matma/app/build/intermediates/dex/debug/mergeProjectDexDebug/0/classes.dex

app/build/kotlin/compileDebugKotlin/cacheable/caches-jvm/lookups/counters.tab

@@ -1,2 +1,2 @@
-3
+4
 0

app/src/main/assets/js/app.js

@@ -55,19 +55,19 @@ const statusEl = document.getElementById('status');
 // load settings from localStorage
 function loadSettings(){
   try{
-  let progressInner = null
+    const raw = (typeof localStorage !== 'undefined') ? localStorage.getItem('matma:settings') : null
     if (raw) {
       const s = JSON.parse(raw)
       state.settings = Object.assign(state.settings, s)
     }
   }catch(e){ console.warn('settings load failed', e) }
-  // reflect to inputs
-  settingTimed.value = state.settings.timedSeconds
-  settingMaxResult.value = state.settings.maxResult
-  settingMaxOperand.value = state.settings.maxOperand
-  settingSessionProblems.value = state.settings.sessionProblems
-  settingAllowNegative.checked = !!state.settings.allowNegative
-  settingAllowFraction.checked = !!state.settings.allowFraction
+  // reflect to inputs (guard in case some inputs are missing)
+  if (settingTimed) settingTimed.value = state.settings.timedSeconds
+  if (settingMaxResult) settingMaxResult.value = state.settings.maxResult
+  if (settingMaxOperand) settingMaxOperand.value = state.settings.maxOperand
+  if (settingSessionProblems) settingSessionProblems.value = state.settings.sessionProblems
+  if (settingAllowNegative) settingAllowNegative.checked = !!state.settings.allowNegative
+  if (settingAllowFraction) settingAllowFraction.checked = !!state.settings.allowFraction
 }
 
 function saveSettings(){
@@ -145,16 +145,16 @@ function startPlay(){
   renderProblem()
 
   if (state.mode === 'timed'){
-    progressInner.style.width = '0%'
-    startTimer(state.settings.timedSeconds)
-    statusEl.textContent = 'Na czas';
-    timerEl.classList.remove('hidden');
+  if (progressInner) progressInner.style.width = '0%'
+  startTimer(state.settings.timedSeconds)
+  if (statusEl) statusEl.textContent = 'Na czas';
+  if (timerEl) timerEl.classList.remove('hidden');
   } else {
-    progressInner.style.width = '0%'
-    state.sessionSolved = 0
-    state.sessionTarget = Math.max(1, state.settings.sessionProblems)
-    updateProgress()
-    timerEl.classList.add('hidden');
+  if (progressInner) progressInner.style.width = '0%'
+  state.sessionSolved = 0
+  state.sessionTarget = Math.max(1, state.settings.sessionProblems)
+  updateProgress()
+  if (timerEl) timerEl.classList.add('hidden');
   }
 }
 
@@ -311,14 +311,14 @@ backspaceBtn.addEventListener('click', ()=>{
 
 function startTimer(seconds){
   state.timeLeft = seconds
-  timerEl.textContent = state.timeLeft
+  if (timerEl) timerEl.textContent = state.timeLeft
 
   stopTimer();
   state.timerId = setInterval(()=>{
     state.timeLeft -= 1
-    timerEl.textContent = state.timeLeft
+    if (timerEl) timerEl.textContent = state.timeLeft
     const pct = Math.max(0, (state.timeLeft / seconds) * 100)
-    progressInner.style.width = pct + '%'
+    if (progressInner) progressInner.style.width = pct + '%'
     if (state.timeLeft <= 0) {
       stopTimer()
       endSession()
@@ -357,9 +357,9 @@ summaryBack.addEventListener('click', ()=>{
 
 function updateProgress(){
   if (state.mode === 'training'){
-    const pct = Math.min(100, Math.round((state.sessionSolved/state.sessionTarget)*100))
-    progressInner.style.width = pct + '%'
-    statusEl.textContent = `${state.sessionSolved}/${state.sessionTarget}`
+  const pct = Math.min(100, Math.round((state.sessionSolved/state.sessionTarget)*100))
+  if (progressInner) progressInner.style.width = pct + '%'
+  if (statusEl) statusEl.textContent = `${state.sessionSolved}/${state.sessionTarget}`
   }
 }
 

app/src/main/assets/js/components.js

@@ -1,7 +1,20 @@
 // Komponenty HTML loader
 function loadComponent(path, replaceMap = {}) {
+  // If path is a full mapped origin used by WebViewAssetLoader, strip it to a relative path.
+  const mappedOrigin = 'https://appassets.androidplatform.net/assets/';
+  if (path.startsWith(mappedOrigin)) {
+    path = path.slice(mappedOrigin.length);
+  }
+
+  // If an absolute path starting with '/' is provided, remove leading slash to make it
+  // relative to the current document (works under local http server and WebViewAssetLoader).
+  if (path.startsWith('/')) path = path.slice(1);
+
   return fetch(path)
-    .then(r => r.text())
+    .then(r => {
+      if (!r.ok) throw new Error('Failed to load component: ' + path);
+      return r.text();
+    })
     .then(html => {
       Object.entries(replaceMap).forEach(([key, val]) => {
         html = html.replaceAll(key, val);

app/src/main/assets/js/czytanie.js

@@ -83,9 +83,8 @@
   }
 
   // ── Back to list ──────────────────────────────────────────────────────────
+  // Zakończ button: natychmiast wróć do listy bez potwierdzenia
   readBackBtn.addEventListener('click', () => {
-    const active = yOffset > 0 || autoTimer !== null
-    if (active && !confirm('Wrócić do listy tekstów?')) return
     clearInterval(autoTimer)
     autoTimer = null
     readWrap.classList.add('hidden')

app/src/main/assets/js/dyktando.js

@@ -296,9 +296,8 @@
   }
 
   // ── Navigation ────────────────────────────────────────────────────────────
+  // Zakończ button: natychmiast wracamy do listy bez potwierdzenia
   playBackBtn.addEventListener('click', () => {
-    const inProgress = blanks.length > 0 && current < blanks.length
-    if (inProgress && !confirm('Przerwać dyktando i wrócić do listy?')) return
     goToList()
   })
 

app/src/main/assets/js/dzielenie.js

@@ -136,7 +136,8 @@
     let sha = (window.COMMIT_SHA || '').toString().trim()
     if (!sha) {
       try {
-        const res = await fetch('/version.sha', { cache: 'no-cache' })
+  // use relative path so the request works under WebViewAssetLoader or a local server
+  const res = await fetch('version.sha', { cache: 'no-cache' })
         if (res.ok) {
           const txt = await res.text()
           const first = txt.split(/\r?\n/).find(l => l.trim().length > 0)

app/src/main/assets/js/mnozenie.js

@@ -136,7 +136,8 @@
     let sha = (window.COMMIT_SHA || '').toString().trim()
     if (!sha) {
       try {
-        const res = await fetch('/version.sha', { cache: 'no-cache' })
+  // use relative path so the request works under WebViewAssetLoader or a local server
+  const res = await fetch('version.sha', { cache: 'no-cache' })
         if (res.ok) {
           const txt = await res.text()
           const first = txt.split(/\r?\n/).find(l => l.trim().length > 0)

app/src/main/assets/js/nav.js

@@ -4,14 +4,10 @@
     const backBtn = document.getElementById('back-to-hub')
     if (!backBtn) return
 
+    // Immediately navigate back to hub/menu without confirmation
     backBtn.addEventListener('click', (e) => {
-      const playScreen = document.getElementById('play-screen')
-      const taskActive = playScreen && !playScreen.classList.contains('hidden')
-      if (taskActive) {
-        e.preventDefault()
-        const ok = confirm('Masz aktywne zadanie. Czy na pewno chcesz wyjść do menu?')
-        if (ok) window.location.href = backBtn.getAttribute('href')
-      }
+      const href = backBtn.getAttribute('href')
+      if (href) window.location.href = href
     })
   })
 })()

app/src/main/java/com/example/app/MainActivity.kt

@@ -1,9 +1,12 @@
 package com.example.app
 
 import android.os.Bundle
+import android.webkit.WebResourceRequest
+import android.webkit.WebResourceResponse
 import android.webkit.WebView
 import android.webkit.WebViewClient
 import androidx.appcompat.app.AppCompatActivity
+import androidx.webkit.WebViewAssetLoader
 
 class MainActivity : AppCompatActivity() {
 
@@ -11,16 +14,27 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
 
         val webView = WebView(this)
-    // Enable remote debugging for WebView so we can inspect JS console via chrome://inspect
-    WebView.setWebContentsDebuggingEnabled(true)
+
+        // Enable remote debugging for WebView so we can inspect JS console via chrome://inspect
+        WebView.setWebContentsDebuggingEnabled(true)
 
         webView.settings.javaScriptEnabled = true
-        webView.settings.allowFileAccess = true
         webView.settings.domStorageEnabled = true
 
-        webView.webViewClient = WebViewClient()
+        // Use WebViewAssetLoader to serve files from /assets/ over a secure origin.
+        val assetLoader = WebViewAssetLoader.Builder()
+            .addPathHandler("/assets/", WebViewAssetLoader.AssetsPathHandler(this))
+            .build()
 
-        webView.loadUrl("file:///android_asset/index.html")
+        webView.webViewClient = object : WebViewClient() {
+            override fun shouldInterceptRequest(view: WebView?, request: WebResourceRequest?): WebResourceResponse? {
+                if (request == null) return null
+                return assetLoader.shouldInterceptRequest(request.url)
+            }
+        }
+
+        // Load the app via the mapped secure origin so fetch() requests are allowed
+        webView.loadUrl("https://appassets.androidplatform.net/assets/index.html")
 
         setContentView(webView)
     }

gradle.properties.example

@@ -0,0 +1,12 @@
+# Example properties for signing your release APK/AAB.
+# DO NOT commit real passwords. Copy this to gradle.properties in your home
+# directory (~/.gradle/gradle.properties) or to a secure CI secret store.
+
+# Path to your keystore file (relative to project root or absolute path)
+MYAPP_STORE_FILE=keystores/my-release-key.jks
+# Your keystore password
+MYAPP_STORE_PASSWORD=
+# Your key alias inside the keystore
+MYAPP_KEY_ALIAS=
+# Your key password (often same as store password)
+MYAPP_KEY_PASSWORD=