A group could be named on Android and never created

Tapping New opened the form, the name field took text, and then nothing:
no member checkboxes, no Create group button, Cancel the only thing that
worked. The controls were there all along, below the fold on a screen that
could not scroll.

The scroll exemption was deliberate and its reason had expired. It read
"only the screens WITHOUT a lazy list may scroll — Contacts owns a
LazyColumn, and a lazy list inside a vertically scrolling Column is
measured with infinite height and crashes outright." True of an UNBOUNDED
list; the buddy list has carried heightIn(max = 320.dp) since it was moved
into its own card. Groups sits below it, so everything the form added fell
off the bottom.

Measured on a 1080x2400 emulator: the name field at y~1879, Create group
past the tab bar at y~2280, and a uiautomator dump finding no scrollable
container and no Create group node at all.

Checked every lazy list on the screen before changing it — the buddy list
is bounded, Stories is a LazyRow. Driven on the emulator afterwards: the
checkbox and button are reachable, a group was created, and it arrived on
iOS as "Demo Group, 2 members".

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

app/src/main/kotlin/io/flamenet/messenger/app/MainActivity.kt

@@ -104,20 +104,34 @@ private fun Root(model: MessengerViewModel = viewModel()) {
                         // sign-out explanation was unreadable and there was no
                         // way back to another tab.
                         //
-                        // ⚠️ Only the screens WITHOUT a lazy list may scroll.
+                        // 🔴 **Every screen scrolls, Contacts included.**
-                        // Contacts owns a LazyColumn, and a lazy list inside a
+                        //
-                        // vertically scrolling Column is measured with infinite
+                        // This used to exempt Contacts, because "a lazy list
-                        // height and crashes outright.
+                        // inside a vertically scrolling Column is measured with
+                        // infinite height and crashes outright". True — but
+                        // only for an UNBOUNDED lazy list, and the buddy list
+                        // has carried `heightIn(max = 320.dp)` since it was put
+                        // in its own card. The exemption outlived its reason.
+                        //
+                        // ⚠️ What it cost: Groups sits below the buddy list on
+                        // this screen, so opening **New group** pushed the
+                        // member checkboxes and the **Create group** button past
+                        // the bottom of a screen that could not scroll. The
+                        // name field was reachable and nothing else was — you
+                        // could type a group name and then only Cancel.
+                        // Measured on a 1080×2400 emulator: the field landed at
+                        // y≈1879, the button past the tab bar at y≈2280, and a
+                        // `uiautomator dump` found no scrollable container and
+                        // no "Create group" node at all.
+                        //
+                        // ⚠️ Before exempting a screen here again, check what is
+                        // BELOW the lazy list, not just the list itself. And
+                        // keep the buddy list bounded — remove that height and
+                        // this does crash.
                         Column(
                             modifier = Modifier
                                 .weight(1f)
-                                .then(
+                                .verticalScroll(rememberScrollState()),
-                                    if (current.screen == MessengerViewModel.Phase.Screen.CONTACTS) {
-                                        Modifier
-                                    } else {
-                                        Modifier.verticalScroll(rememberScrollState())
-                                    }
-                                ),
                             verticalArrangement = Arrangement.spacedBy(12.dp),
                         ) {
                             when (current.screen) {