Merge branch 'main' of git.arirex.me:iris/ai-app

The drag-right-to-go-back gesture was removed on the other side while the
file explorer was being built on this one, so the explorer's own use of it
goes with it: back inside the explorer is the arrow and the platform's own
gesture, which is what the rest of the app now has too.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

app/androidApp/src/main/kotlin/com/example/aiapp/AppRoot.kt

@@ -208,10 +208,10 @@ fun AppRoot(
             // row key. Only reachable since a notification can move straight from one session to
             // another; every other way here passes through [Screen.Main], which disposes it anyway.
             key(here.summary.id) {
-                // The gesture goes on a box around the screen rather than inside it, so it is the
-                // outermost thing in the tree and everything within has already had its chance at
-                // the drag. See [swipeBack]. No imePadding here, for the reason above.
-                Box(Modifier.swipeBack(goToMain)) {
+                // A Box so the explorer can be drawn *over* the session rather than instead of
+                // it; the session stays composed underneath. No imePadding here, for the reason
+                // above -- the explorer adds its own, since it has a text field.
+                Box {
                     SessionScreen(
                         settings = current,
                         summary = here.summary,
@@ -220,9 +220,8 @@ fun AppRoot(
                         share = share,
                         onShareTaken = { share = null },
                     )
-                    // Over the session, in the same Box, with the session still composed beneath
-                    // it. Its own back handler is registered after this screen's, so it is the one
-                    // the platform asks first, and it steps back inside itself before closing.
+                    // Its own back handler is registered after this screen's, so it is the one the
+                    // platform asks first, and it steps back inside itself before closing.
                     here.files?.let { target ->
                         FilesScreen(
                             settings = current,
@@ -233,7 +232,7 @@ fun AppRoot(
                 }
             }
         is Screen.Spawn ->
-            Box(Modifier.imePadding().swipeBack(goToMain)) {
+            Box(Modifier.imePadding()) {
                 SpawnScreen(
                     settings = current,
                     onSpawned = { spawned ->
@@ -244,7 +243,7 @@ fun AppRoot(
                 )
             }
         is Screen.Settings ->
-            Box(Modifier.imePadding().swipeBack(goToMain)) {
+            Box(Modifier.imePadding()) {
                 SettingsScreen(
                     existing = current,
                     onSaved = { saved ->