1.2.4: pull-to-refresh only at the top of the chat

The swipe gesture no longer reloads the page while a presentation, the
canvas, a dialog or any other scrolled list is on screen: the web app
reports a single pull-allowed flag (overlays + every scroller), the shell
starts from 'forbidden' until the page says otherwise and the WebView
drops its overscroll glow.

README.md

@@ -15,7 +15,9 @@ resources.
   leaves the app.
 - TLS errors are never bypassed, no cleartext traffic, no backup.
 - Day/night theme follows the system; the page keeps its own theme setting.
-- Back gesture navigates the chat history, pull-to-refresh reloads.
+- Back gesture navigates the chat history; pull-to-refresh reloads only at
+the very top of the chat — never inside a presentation, a dialog or another
+list.
 
 ## Install
 
@@ -23,7 +25,7 @@ Download the APK from the releases page:
 **https://git.n1ko.dev/Niko/nikogpt_android/releases**
 
 Latest build:
-https://git.n1ko.dev/Niko/nikogpt_android/releases/download/v1.2.3/nikogpt-android-1.2.3.apk
+https://git.n1ko.dev/Niko/nikogpt_android/releases/download/v1.2.4/nikogpt-android-1.2.4.apk
 
 Open the APK on the phone (allow installing apps from this source when Android
 asks). The APKs are signed with the project's release key; Android may still

app/build.gradle.kts

@@ -22,8 +22,8 @@ android {
         applicationId = "dev.n1ko.nikogpt"
         minSdk = 29 // Android 10
         targetSdk = 35
-        versionCode = 9
-        versionName = "1.2.3"
+        versionCode = 10
+        versionName = "1.2.4"
     }
 
     signingConfigs {

app/src/main/java/dev/n1ko/nikogpt/MainActivity.kt

@@ -80,10 +80,14 @@ class MainActivity : AppCompatActivity() {
 
     // Shared text ("Share to NikoGPT") waiting for the page to load.
     private var pendingShare: String? = null
-    // Whether the chat's inner scroll container is at the top; pull-to-refresh
-    // only fires there (the WebView itself never scrolls).
+    // Whether the web app currently allows a pull-to-refresh gesture. It
+    // reports this on every scroll and whenever an overlay opens or closes
+    // (window.NikoGPTAndroid.setAtTop), because the WebView itself never
+    // scrolls — the messages list, a presentation viewer, dialogs … all scroll
+    // inside the page. Starts false: until the page explicitly says "at the
+    // top of the chat", a pull must not reload anything.
     @Volatile
-    private var webAtTop = true
+    private var webAtTop = false
     // Where the camera writes the picture before it reaches the web app.
     private var pendingCameraUri: Uri? = null
 
@@ -291,8 +295,11 @@ class MainActivity : AppCompatActivity() {
         refresh.setOnRefreshListener { webView.reload() }
         // Pull-to-refresh only when the chat list is really at the top; a
         // bigger trigger distance keeps normal scrolling from reloading.
-        refresh.setOnChildScrollUpCallback { _, _ -> !webAtTop }
+        refresh.setOnChildScrollUpCallback { _, _ -> !webAtTop || webView.canScrollVertically(-1) }
         refresh.setDistanceToTriggerSync((80 * resources.displayMetrics.density).toInt())
+        // No native overscroll glow/bounce on the WebView either: the page
+        // owns every scroller.
+        webView.overScrollMode = View.OVER_SCROLL_NEVER
 
         onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
             override fun handleOnBackPressed() {