Keep New workspace metadata inside the composer (#3050)

Allow desktop metadata controls to shrink so long host and starting-ref labels truncate without crossing the composer rail. Adds a real-browser regression for the combined long-label case.

packages/app/src/screens/new-workspace-screen.tsx

@@ -1350,8 +1350,10 @@ function useNewWorkspaceFormStack(input: NewWorkspaceFormStackInput): ReactEleme
     [isPending],
   );
 
+  const desktopControlStyle = isCompact ? undefined : styles.desktopControl;
+
   const projectControl = (
-    <View>
+    <View style={desktopControlStyle}>
       <ProjectPickerTrigger
         pickerAnchorRef={project.anchorRef}
         onPress={project.open}
@@ -1388,7 +1390,7 @@ function useNewWorkspaceFormStack(input: NewWorkspaceFormStackInput): ReactEleme
   );
 
   const hostControl = showHostControl ? (
-    <View>
+    <View style={desktopControlStyle}>
       <HostPicker
         hosts={host.allHosts}
         value={host.selectedServerId}
@@ -1431,7 +1433,7 @@ function useNewWorkspaceFormStack(input: NewWorkspaceFormStackInput): ReactEleme
   ) : null;
 
   const isolationControl = isolation.canCreateWorktree ? (
-    <View>
+    <View style={desktopControlStyle}>
       <IsolationPickerTrigger
         pickerAnchorRef={isolation.anchorRef}
         onPress={isolation.open}
@@ -1458,7 +1460,7 @@ function useNewWorkspaceFormStack(input: NewWorkspaceFormStackInput): ReactEleme
   ) : null;
 
   const baseControl = base.showRefPicker ? (
-    <View>
+    <View style={desktopControlStyle}>
       <RefPickerTrigger
         pickerAnchorRef={base.anchorRef}
         onPress={base.open}
@@ -2392,6 +2394,10 @@ const styles = StyleSheet.create((theme) => ({
     paddingRight: theme.spacing[4],
     gap: theme.spacing[2],
   },
+  desktopControl: {
+    minWidth: 0,
+    flexShrink: 1,
+  },
   // The row's left inset matches the heading's text x (composerTitleContainer
   // paddingLeft) so the control aligns with the "New workspace" glyph. The badge
   // adds its own left padding, so the row inset is reduced by that amount.