ADFA-5192 refactor(terminal): re-home the Debian terminal into TerminalActivity

controller/app/src/main/AndroidManifest.xml

@@ -70,6 +70,17 @@
             adjustPan, so the IME covered the ExtraKeys bar and the text stuck. adjustResize shrinks the
             window so the extra-keys bar + terminal sit above the keyboard. -->
 
+        <!-- ADFA-5192: the Debian terminal re-homed out of MainActivity. Same window/IME setup as
+             MainActivity carried the terminal (adjustResize + configChanges); singleTop lets the
+             keep-alive notification's SINGLE_TOP intent reuse the running instance. Not exported:
+             launched only in-app (redesign Settings, the terminal's own notification PendingIntent). -->
+        <activity
+            android:name=".TerminalActivity"
+            android:exported="false"
+            android:launchMode="singleTop"
+            android:configChanges="orientation|screenSize|screenLayout|keyboardHidden"
+            android:windowSoftInputMode="adjustResize" />
+
         <activity
             android:name=".PortalActivity"
             android:exported="false"

controller/app/src/main/java/org/iiab/controller/TerminalActivity.java

@@ -0,0 +1,127 @@
+/*
+ * ============================================================================
+ * Name        : TerminalActivity.java
+ * Author      : AppDevForAll
+ * Copyright   : Copyright (c) 2026 AppDevForAll
+ * Description : ADFA-5192. Dedicated host for the Debian terminal, re-homed out of the
+ *               legacy MainActivity so that Activity (and the dead legacy tabbed UI) can
+ *               be removed. Thin by design: it loads the native termux engine, hosts the
+ *               terminal_bottom_sheet layout, and delegates everything to TerminalController
+ *               (which owns the TerminalView, sessions, drawer and extra keys). The two
+ *               Activity-side callbacks TerminalController needs — addToLog / vibrateDevice —
+ *               are implemented here.
+ *
+ *               Behaviour-preserving: the terminal opens full-screen and a swipe-down on the
+ *               sheet finishes back to the caller (the redesign), exactly as the old
+ *               terminal-only mode did in MainActivity.
+ * ============================================================================
+ */
+package org.iiab.controller;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Build;
+import android.os.Bundle;
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+
+import com.google.android.material.bottomsheet.BottomSheetBehavior;
+
+public class TerminalActivity extends AppCompatActivity implements TerminalController.Host {
+
+    // Load native C++ engine (termux). Was previously loaded by MainActivity's static block.
+    static {
+        System.loadLibrary("termux");
+    }
+
+    private TerminalController terminalController;
+    private boolean finishOnHideAttached = false;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.terminal_activity);
+
+        terminalController = new TerminalController(this, this);
+        terminalController.bind();
+        openTerminal();
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        setIntent(intent);
+        // Reused via FLAG_ACTIVITY_SINGLE_TOP (e.g. the keep-alive notification): re-expand.
+        openTerminal();
+    }
+
+    private void openTerminal() {
+        if (terminalController == null) return;
+        View root = findViewById(R.id.terminal_coordinator);
+        Runnable open = () -> {
+            terminalController.openFullTerminal();
+            // Attach finish-on-hide only after the sheet has been expanded, so the initial
+            // HIDDEN state (set in bind()) can never reach a live callback and close the
+            // Activity on launch. Mirrors MainActivity, which attached it inside the open.
+            attachFinishOnHide();
+        };
+        if (root != null) root.post(open);
+        else open.run();
+    }
+
+    /**
+     * Swiping the terminal sheet down finishes back to the caller instead of exposing an
+     * empty surface. Mirrors MainActivity.attachTerminalOnlyFinish (ADFA-4987): no peek
+     * stop — a swipe-down goes straight to HIDDEN -> finish(). Attached once (after the
+     * first expand); a re-open via onNewIntent must not stack a second callback.
+     */
+    private void attachFinishOnHide() {
+        if (finishOnHideAttached) return;
+        View sheet = findViewById(R.id.terminal_bottom_sheet);
+        if (sheet == null) return;
+        BottomSheetBehavior<View> b = BottomSheetBehavior.from(sheet);
+        b.setHideable(true);
+        b.setSkipCollapsed(true);
+        b.addBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
+            @Override
+            public void onStateChanged(@NonNull View bottomSheet, int newState) {
+                if (newState == BottomSheetBehavior.STATE_HIDDEN) {
+                    finish();
+                }
+            }
+
+            @Override
+            public void onSlide(@NonNull View bottomSheet, float slideOffset) { }
+        });
+        finishOnHideAttached = true;
+    }
+
+    @Override
+    protected void onDestroy() {
+        // Release the terminal UI delegate so the app-scoped session store never holds a
+        // destroyed Activity; running sessions keep going (ADFA-4696).
+        if (terminalController != null) terminalController.detach();
+        super.onDestroy();
+    }
+
+    // --- TerminalController.Host ---------------------------------------------
+    @Override
+    public void addToLog(String message) {
+        // Single source of truth; the Usage console observes LogRepository (ADFA-4640).
+        LogRepository.get().append(message);
+    }
+
+    @Override
+    public void vibrateDevice() {
+        android.os.Vibrator v = (android.os.Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
+        if (v != null && v.hasVibrator()) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                v.vibrate(android.os.VibrationEffect.createOneShot(50, android.os.VibrationEffect.DEFAULT_AMPLITUDE));
+            } else {
+                v.vibrate(50);
+            }
+        }
+    }
+}

controller/app/src/main/java/org/iiab/controller/TerminalSessionService.java

@@ -93,11 +93,10 @@ CHANNEL_ID, getString(R.string.terminal_channel_name),
     }
 
     private Notification buildNotification() {
-        // Tapping the notification opens the terminal directly, bypassing the hidden
-        // version-footer gesture (ADFA-4696). SINGLE_TOP reuses the running Activity.
-        Intent open = new Intent(this, MainActivity.class)
-                .putExtra(MainActivity.EXTRA_OPEN_TERMINAL, true)
-                .putExtra(MainActivity.EXTRA_TERMINAL_ONLY, true)
+        // Tapping the notification opens the terminal directly (ADFA-4696). ADFA-5192: the terminal
+        // is its own Activity now, so no terminal-only extras are needed. SINGLE_TOP reuses the
+        // running instance.
+        Intent open = new Intent(this, TerminalActivity.class)
                 .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
         PendingIntent pending = PendingIntent.getActivity(
                 this, 0, open, PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT);

controller/app/src/main/java/org/iiab/controller/redesign/SettingsSubFragment.java

@@ -205,12 +205,9 @@ private void openAppSettings(Context ctx) {
         } catch (Exception ignore) { /* no-op */ }
     }
 
-    /** The full Debian terminal lives in MainActivity; EXTRA_OPEN_TERMINAL opens it directly. */
+    /** The full Debian terminal lives in its own TerminalActivity (ADFA-5192). */
     private void openTerminal(Context ctx) {
-        Intent i = new Intent(ctx, org.iiab.controller.MainActivity.class);
-        i.putExtra(org.iiab.controller.MainActivity.EXTRA_OPEN_TERMINAL, true);
-        i.putExtra(org.iiab.controller.MainActivity.EXTRA_TERMINAL_ONLY, true);
-        ctx.startActivity(i);
+        ctx.startActivity(new Intent(ctx, org.iiab.controller.TerminalActivity.class));
     }
 
     // ---- Advanced (power-user features — preview for now) ----

controller/app/src/main/res/layout/terminal_activity.xml

@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ADFA-5192: the Debian terminal re-homed out of the legacy MainActivity into its own
+  TerminalActivity. This is the terminal_bottom_sheet subtree lifted verbatim from
+  res/layout/main.xml (drag handle + drawer + TerminalView + extra keys), kept as a
+  BottomSheetBehavior child of a CoordinatorLayout so TerminalController.bind() —
+  which does BottomSheetBehavior.from(terminal_bottom_sheet) — works unchanged.
+  The terminal is a legitimately always-dark surface (like the QR black/white), so the
+  hardcoded dark hex is intentional and carried over as-is; restyling to M3 tokens is
+  out of scope for a behaviour-preserving re-home.
+-->
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/terminal_coordinator"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#000000">
+
+    <LinearLayout
+        android:id="@+id/terminal_bottom_sheet"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:background="#000000"
+        app:behavior_hideable="true"
+        app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
+
+        <FrameLayout
+            android:id="@+id/terminal_drag_handle_area"
+            android:layout_width="match_parent"
+            android:layout_height="32dp"
+            android:background="#111111"
+            android:clickable="true"
+            android:focusable="true">
+
+            <LinearLayout
+                android:layout_width="80dp"
+                android:layout_height="20dp"
+                android:layout_gravity="center"
+                android:background="#222222"
+                android:gravity="center"
+                android:orientation="vertical">
+
+                <View
+                    android:layout_width="32dp"
+                    android:layout_height="2dp"
+                    android:layout_marginBottom="4dp"
+                    android:background="#555555" />
+
+                <View
+                    android:layout_width="32dp"
+                    android:layout_height="2dp"
+                    android:background="#555555" />
+            </LinearLayout>
+        </FrameLayout>
+
+        <androidx.drawerlayout.widget.DrawerLayout
+            android:id="@+id/drawer_layout"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1">
+
+            <com.termux.view.TerminalView
+                android:id="@+id/terminal_view"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent" />
+
+            <LinearLayout
+                android:id="@+id/left_drawer"
+                android:layout_width="280dp"
+                android:layout_height="match_parent"
+                android:layout_gravity="start"
+                android:background="#1A1A1A"
+                android:orientation="vertical"
+                android:elevation="8dp">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="@string/sessions_title"
+                    android:textColor="#FFFFFF"
+                    android:textSize="14sp"
+                    android:textStyle="bold"
+                    android:padding="16dp"
+                    android:background="#111111" />
+
+                <ListView
+                    android:id="@+id/left_drawer_list"
+                    android:layout_width="match_parent"
+                    android:layout_height="0dp"
+                    android:layout_weight="1"
+                    android:choiceMode="singleChoice"
+                    android:divider="#333333"
+                    android:dividerHeight="1dp" />
+
+                <Button
+                    android:id="@+id/new_session_button"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="16dp"
+                    android:backgroundTint="#333333"
+                    android:textColor="#FFFFFF"
+                    android:text="@string/new_session_btn"
+                    android:textStyle="bold" />
+            </LinearLayout>
+
+        </androidx.drawerlayout.widget.DrawerLayout>
+
+        <com.termux.shared.termux.extrakeys.ExtraKeysView
+            android:id="@+id/extra_keys_view"
+            android:layout_width="match_parent"
+            android:layout_height="86dp"
+            android:background="#1E1E1E"
+            android:visibility="visible" />
+    </LinearLayout>
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>