fix: initiate OAuth using Custom Tabs on Android, closes #361 (#788)

apps/readest-app/src-tauri/gen/android/app/src/main/AndroidManifest.xml

@@ -19,6 +19,12 @@
             android:label="@string/main_activity_title"
             android:name=".MainActivity"
             android:exported="true">
+	    <intent-filter android:label="oauth">
+		<action android:name="android.intent.action.VIEW" />
+		<category android:name="android.intent.category.DEFAULT" />
+		<category android:name="android.intent.category.BROWSABLE" />
+		<data android:scheme="readest" android:host="auth-callback" />
+	    </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />

apps/readest-app/src-tauri/gen/android/app/src/main/java/com/bilingify/readest/MainActivity.kt

@@ -2,10 +2,14 @@ package com.bilingify.readest
 
 import android.os.Build
 import android.os.Bundle
+import android.content.Intent
+import android.net.Uri
 import android.view.View
 import android.view.WindowInsets
 import android.view.WindowInsetsController
 import androidx.activity.enableEdgeToEdge
+import app.tauri.plugin.JSObject
+import com.readest.native_bridge.NativeBridgePlugin
 
 class MainActivity : TauriActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -15,6 +19,20 @@ class MainActivity : TauriActivity() {
         hideSystemUI()
     }
 
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+
+        val uri = intent.data ?: return
+        if (uri.scheme == "readest" && uri.host == "auth-callback") {
+            val result = JSObject().apply {
+                put("redirectUrl", uri.toString())
+            }
+
+            NativeBridgePlugin.pendingInvoke?.resolve(result)
+            NativeBridgePlugin.pendingInvoke = null
+        }
+  }
+
     private fun hideSystemUI() {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
             window.decorView.windowInsetsController?.let { controller ->