fix(mobile): Android floating tab bar fills the row when compose is hidden

apps/mobile/src/features/workspace/AndroidWorkspaceNavigation.android.tsx

@@ -86,13 +86,6 @@ export function AndroidWorkspaceNavigation(props: {
   const rail = Boolean(props.rail);
   const floating = !rail && Boolean(props.floating);
   const tabs = [...visibleNavigationTabs(order, hidden, rail ? 5 : 4), "settings"];
-  const metrics = floatingTabsMetrics(
-    tabs.length,
-    scale,
-    fabSize,
-    props.paneWidth ?? window.width,
-    props.fillWidth,
-  );
   const { containerColor, indicatorColor, selectedColor, unselectedColor } =
     androidWorkspaceNavigationColors(colors, rail, floating);
   const selectedTab = selectedNavigationTab(
@@ -102,6 +95,24 @@ export function AndroidWorkspaceNavigation(props: {
     hidden,
     rail ? 5 : 4,
   );
+  // FloatingWorkspaceTabs starts the bar at the left inset, so a cutout narrows the room.
+  const barWidth =
+    props.paneWidth ??
+    window.width - (Math.max(insets.left, FLOATING_TABS.edge) - FLOATING_TABS.edge);
+  // A phone draws compose on the Chats list only; the split sidebar draws it on every tab
+  // except the Settings and Usage pages.
+  const composeBesideBar =
+    props.paneWidth === undefined
+      ? selectedTab === "threads"
+      : selectedTab !== "settings" && selectedTab !== "usage";
+  const metrics = floatingTabsMetrics(
+    tabs.length,
+    scale,
+    fabSize,
+    barWidth,
+    props.fillWidth,
+    composeBesideBar && connectionState.hasConnections,
+  );
   if (!rail && keyboardVisible) return null;
 
   return (

apps/mobile/src/features/workspace/floating-workspace-tabs.ts

@@ -7,6 +7,7 @@ export function floatingTabsMetrics(
   fabSize: number,
   paneWidth?: number,
   fillWidth = false,
+  composeVisible = true,
 ) {
   const unit = Math.max(1, scale);
   const height = fabSize;
@@ -16,11 +17,10 @@ export function floatingTabsMetrics(
   const room =
     paneWidth === undefined
       ? count * 60 * unit
-      : sharesRow
+      : sharesRow && composeVisible
         ? paneWidth - beside
         : paneWidth - 2 * FLOATING_TABS.edge;
   return {
-    // Reserve the compose slot even while its button is hidden.
     pill: Math.max(0, fillWidth ? room : Math.min(count * 72 * unit, room)),
     height,
     row,