feat(android): Add screen context capture for voice assistant

android/app/src/main/kotlin/app/cogwheel/conduit/ConduitVoiceInteractionSession.kt

@@ -9,6 +9,24 @@ import android.app.assist.AssistContent
 
 class ConduitVoiceInteractionSession(context: Context) : VoiceInteractionSession(context) {
 
+    private var capturedContext: String? = null
+    private var summarizeButton: android.widget.Button? = null
+
+    override fun onCreateContentView(): android.view.View {
+        val view = layoutInflater.inflate(app.cogwheel.conduit.R.layout.assistant_overlay, null)
+        summarizeButton = view.findViewById(app.cogwheel.conduit.R.id.btn_summarize)
+        summarizeButton?.setOnClickListener {
+            launchAppWithContext()
+        }
+        
+        val closeButton = view.findViewById<android.view.View>(app.cogwheel.conduit.R.id.btn_close)
+        closeButton?.setOnClickListener {
+            finish()
+        }
+        
+        return view
+    }
+
     override fun onHandleAssist(
         data: Bundle?,
         structure: AssistStructure?,
@@ -18,9 +36,56 @@ class ConduitVoiceInteractionSession(context: Context) : VoiceInteractionSession
         
         android.util.Log.d("ConduitVoiceSession", "onHandleAssist called")
 
-        // Launch the main activity when the assistant is triggered
-        val intent = Intent(context, MainActivity::class.java)
-        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
-        context.startActivity(intent)
+        val screenContext = StringBuilder()
+        structure?.let {
+            val nodes = it.windowNodeCount
+            for (i in 0 until nodes) {
+                val windowNode = it.getWindowNodeAt(i)
+                traverseNode(windowNode.rootViewNode, screenContext)
+            }
+        }
+        
+        capturedContext = screenContext.toString()
+        // Ideally, we could update the UI here to say "Context Ready"
+    }
+
+    private fun launchAppWithContext() {
+        try {
+            android.util.Log.d("ConduitVoiceSession", "Attempting to launch app with context")
+            val intent = Intent(context, MainActivity::class.java)
+            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)
+            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+            
+            if (capturedContext != null) {
+                intent.putExtra("screen_context", capturedContext)
+                android.util.Log.d("ConduitVoiceSession", "Context attached: ${capturedContext?.take(50)}...")
+            } else {
+                android.util.Log.d("ConduitVoiceSession", "No context captured")
+            }
+            
+            context.startActivity(intent)
+            android.util.Log.d("ConduitVoiceSession", "App launch requested")
+            finish() // Close the overlay
+        } catch (e: Exception) {
+            android.util.Log.e("ConduitVoiceSession", "Failed to launch app", e)
+        }
+    }
+
+    private fun traverseNode(node: AssistStructure.ViewNode?, builder: StringBuilder) {
+        if (node == null) return
+
+        if (node.text != null) {
+            builder.append(node.text).append("\n")
+        }
+        
+        // Also check content description for accessibility text
+        if (node.contentDescription != null) {
+             builder.append(node.contentDescription).append("\n")
+        }
+
+        for (i in 0 until node.childCount) {
+            traverseNode(node.getChildAt(i), builder)
+        }
     }
 }

android/app/src/main/kotlin/app/cogwheel/conduit/MainActivity.kt

@@ -23,12 +23,32 @@ class MainActivity : FlutterActivity() {
         windowInsetsController.isAppearanceLightNavigationBars = false
     }
     
+    private val CHANNEL = "app.cogwheel.conduit/assistant"
+    private var methodChannel: io.flutter.plugin.common.MethodChannel? = null
+
     override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
         super.configureFlutterEngine(flutterEngine)
         
         // Initialize background streaming handler
         backgroundStreamingHandler = BackgroundStreamingHandler(this)
         backgroundStreamingHandler.setup(flutterEngine)
+
+        methodChannel = io.flutter.plugin.common.MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL)
+        
+        // Check if started with context
+        handleIntent(intent)
+    }
+
+    override fun onNewIntent(intent: android.content.Intent) {
+        super.onNewIntent(intent)
+        handleIntent(intent)
+    }
+
+    private fun handleIntent(intent: android.content.Intent) {
+        val screenContext = intent.getStringExtra("screen_context")
+        if (screenContext != null) {
+            methodChannel?.invokeMethod("analyzeScreen", screenContext)
+        }
     }
     
     override fun onDestroy() {

android/app/src/main/res/drawable/rounded_button_bg.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#2196F3" />
+    <corners android:radius="20dp" />
+</shape>

android/app/src/main/res/drawable/rounded_overlay_bg.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@android:color/white" />
+    <corners android:radius="28dp" />
+</shape>

android/app/src/main/res/layout/assistant_overlay.xml

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="16dp">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:background="@drawable/rounded_overlay_bg"
+        android:padding="24dp"
+        android:elevation="8dp"
+        android:layout_marginBottom="16dp">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="center_vertical"
+            android:layout_marginBottom="24dp">
+            
+            <!-- App Icon Placeholder (optional) -->
+            <!-- <ImageView ... /> -->
+
+            <TextView
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="Conduit"
+                android:textSize="20sp"
+                android:textStyle="bold"
+                android:textColor="@android:color/black"
+                android:fontFamily="sans-serif-medium"/>
+                
+            <!-- Close Button (X) -->
+             <ImageView
+                android:id="@+id/btn_close"
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:src="@android:drawable/ic_menu_close_clear_cancel"
+                android:alpha="0.5"/>
+        </LinearLayout>
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="I can read your screen to help you."
+            android:textSize="16sp"
+            android:textColor="#5F6368"
+            android:layout_marginBottom="24dp"/>
+
+        <Button
+            android:id="@+id/btn_summarize"
+            android:layout_width="match_parent"
+            android:layout_height="56dp"
+            android:text="Summarize this screen"
+            android:textAllCaps="false"
+            android:textSize="16sp"
+            android:textStyle="bold"
+            android:textColor="@android:color/white"
+            android:background="@drawable/rounded_button_bg"
+            android:stateListAnimator="@null"
+            android:elevation="0dp"/>
+
+    </LinearLayout>
+</FrameLayout>