fix(ui): dynamically shrink EmptyHero bottom spacer on keyboard open to keep greeting visible

app/src/main/java/dev/kaizen/app/chat/ChatComponents.kt

@@ -162,7 +162,12 @@ fun EmptyHero(userName: String, onPick: (String) -> Unit, modifier: Modifier = M
             SuggestionPills(onPick)
         }
         
-        Spacer(Modifier.height(142.dp)) // Clear the floating bottom dock
+        // Dynamically shrink the bottom spacer when the keyboard is open.
+        // This ensures the remaining elements fit perfectly into the space above the keyboard
+        // without causing the column to exceed the screen height and trigger an automatic scroll.
+        // As a result, the greeting remains perfectly stationary and visible while typing!
+        val bottomSpacerHeight = if (isKeyboardOpen) 72.dp else 142.dp
+        Spacer(Modifier.height(bottomSpacerHeight))
     }
 }