diff --git a/frontend/src/components/EditorLayout/DeleteStackDialog.tsx b/frontend/src/components/EditorLayout/DeleteStackDialog.tsx
index a4a6a18f..387188fa 100644
--- a/frontend/src/components/EditorLayout/DeleteStackDialog.tsx
+++ b/frontend/src/components/EditorLayout/DeleteStackDialog.tsx
@@ -22,11 +22,18 @@ export function DeleteStackDialog({ open, onOpenChange, stackName, onConfirm }:
             open={open}
             onOpenChange={handleOpenChange}
             variant="destructive"
-            kicker={`${(stackName ?? 'STACK').toUpperCase()} · REMOVE · IRREVERSIBLE`}
+            kicker="REMOVE · IRREVERSIBLE"
             title={
                 stackName ? (
                     <>
-                        Delete <em className="font-display italic text-destructive">{stackName}</em>?
+                        Delete{' '}
+                        <em
+                            className="font-display italic text-destructive break-all"
+                            title={stackName}
+                        >
+                            {stackName}
+                        </em>
+                        ?
                     </>
                 ) : (
                     'Delete stack?'
diff --git a/frontend/src/components/EditorLayout/__tests__/DeleteStackDialog.test.tsx b/frontend/src/components/EditorLayout/__tests__/DeleteStackDialog.test.tsx
new file mode 100644
index 00000000..65a3fdab
--- /dev/null
+++ b/frontend/src/components/EditorLayout/__tests__/DeleteStackDialog.test.tsx
@@ -0,0 +1,31 @@
+import { describe, it, expect, vi } from 'vitest';
+import { render, screen } from '@testing-library/react';
+import { DeleteStackDialog } from '../DeleteStackDialog';
+
+const LONG_STACK_NAME = 'this-is-a-very-long-stack-name-that-should-not-push-actions-off-screen';
+
+function renderLongNameDialog() {
+    render(
+        <DeleteStackDialog
+            open
+            onOpenChange={vi.fn()}
+            stackName={LONG_STACK_NAME}
+            onConfirm={vi.fn()}
+        />,
+    );
+}
+
+describe('DeleteStackDialog', () => {
+    it('keeps Delete and Cancel visible when the stack name is very long', () => {
+        renderLongNameDialog();
+
+        expect(screen.getByRole('button', { name: 'Delete' })).toBeVisible();
+        expect(screen.getByRole('button', { name: 'Cancel' })).toBeVisible();
+    });
+
+    it('exposes the full stack name on hover via title', () => {
+        renderLongNameDialog();
+
+        expect(screen.getByTitle(LONG_STACK_NAME)).toHaveTextContent(LONG_STACK_NAME);
+    });
+});
diff --git a/frontend/src/components/ui/modal.tsx b/frontend/src/components/ui/modal.tsx
index 983dbe5a..fcbcf162 100644
--- a/frontend/src/components/ui/modal.tsx
+++ b/frontend/src/components/ui/modal.tsx
@@ -88,12 +88,15 @@ function HeaderShell({
 }: HeaderShellProps) {
   const v = HEADER_VARIANT[variant];
   return (
-    <div className="relative border-b border-card-border/60 px-6 pt-6 pb-4 pr-12">
+    <div className="relative shrink-0 border-b border-card-border/60 px-6 pt-6 pb-4 pr-12">
       <span aria-hidden className={cn('absolute inset-y-0 left-0 w-[3px]', v.rail)} />
-      <div className={cn(KICKER_CLASS, 'whitespace-nowrap', v.kicker)}>
+      <div className={cn(KICKER_CLASS, 'truncate', v.kicker)} title={kicker}>
         {kicker}
       </div>
-      <TitleComponent className="mt-1 font-heading text-[1.75rem] leading-tight text-stat-value">
+      <TitleComponent
+        className="mt-1 font-heading text-[1.75rem] leading-tight text-stat-value break-all line-clamp-3"
+        title={typeof title === 'string' ? title : undefined}
+      >
         {title}
       </TitleComponent>
       <DescriptionComponent className="sr-only">
@@ -147,8 +150,22 @@ function ConfirmDestructiveHeader(props: ModalHeaderBaseProps) {
   );
 }
 
-export function ModalBody({ className, ...props }: React.HTMLAttributes<HTMLDivElement>) {
-  return <div className={cn('px-6 py-5 space-y-4 max-h-[calc(85vh-12rem)] overflow-y-auto', className)} {...props} />;
+interface ModalBodyProps extends React.HTMLAttributes<HTMLDivElement> {
+  /** Grow within a flex-column confirm shell; body scrolls instead of stretching the dialog. */
+  fill?: boolean;
+}
+
+export function ModalBody({ className, fill, ...props }: ModalBodyProps) {
+  return (
+    <div
+      className={cn(
+        'px-6 py-5 space-y-4 overflow-y-auto',
+        fill ? 'min-h-0 flex-1' : 'max-h-[calc(85vh-12rem)]',
+        className,
+      )}
+      {...props}
+    />
+  );
 }
 
 interface ModalFooterProps {
@@ -160,7 +177,7 @@ interface ModalFooterProps {
 
 export function ModalFooter({ primary, secondary, hint, hintAccent }: ModalFooterProps) {
   return (
-    <div className="flex items-center justify-between gap-4 border-t border-card-border/60 px-6 py-4">
+    <div className="flex shrink-0 items-center justify-between gap-4 border-t border-card-border/60 px-6 py-4">
       <div className={cn(KICKER_CLASS, 'text-stat-subtitle')}>
         {hint}
         {hintAccent !== undefined && (
@@ -221,9 +238,9 @@ export function ConfirmModal({
 
   return (
     <AlertDialog open={open} onOpenChange={onOpenChange}>
-      <AlertDialogContent className={cn('p-0 gap-0 overflow-hidden border-card-border/60', SIZE_CLASS[size])}>
+      <AlertDialogContent className={cn('flex max-h-[85dvh] flex-col p-0 gap-0 overflow-hidden border-card-border/60', SIZE_CLASS[size])}>
         <Header kicker={kicker} title={title} description={description} />
-        {children !== undefined && <ModalBody>{children}</ModalBody>}
+        {children !== undefined && <ModalBody fill>{children}</ModalBody>}
         <ModalFooter
           hint={hint}
           secondary={