fix: replace cursor-follow tooltip with standard Radix tooltip in sidebar rows

Replaced the Cursor/CursorFollow animate-ui primitives in StackRow
with the standard Radix Tooltip/TooltipTrigger/TooltipContent already
used throughout the app. The custom cursor dot that followed the mouse
is gone; tooltips now appear as static popovers on hover/touch.

frontend/src/components/sidebar/StackRow.tsx

@@ -1,10 +1,10 @@
 import type { ReactNode } from 'react';
 import { GitBranch, Loader2, AlertCircle } from 'lucide-react';
 import type { CheckStatus } from '@/types/imageUpdates';
-import { Cursor, CursorContainer, CursorFollow, CursorProvider } from '@/components/animate-ui/primitives/animate/cursor';
 import { Checkbox } from '@/components/ui/checkbox';
 import type { Label } from '@/components/label-types';
 import { cn } from '@/lib/utils';
+import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip';
 import { sidebarRowActive, sidebarRowBase, sidebarRowCheckboxSlot } from './sidebar-styles';
 import { statusText, statusColor } from './stack-status-utils';
 import type { StackRowStatus } from './stack-status-utils';
@@ -34,15 +34,14 @@ interface StackRowProps {
 
 function RowTooltip({ trigger, label }: { trigger: ReactNode; label: string }) {
   return (
-    <CursorProvider>
-      <CursorContainer className="inline-flex items-center shrink-0">{trigger}</CursorContainer>
-      <Cursor><div className="h-2 w-2 rounded-full bg-brand" /></Cursor>
-      <CursorFollow side="bottom" sideOffset={4} align="center" transition={{ stiffness: 400, damping: 40, bounce: 0 }}>
-        <div className="rounded-md border border-card-border bg-popover/95 backdrop-blur-[10px] backdrop-saturate-[1.15] px-2.5 py-1.5 shadow-md">
+    <TooltipProvider delayDuration={300}>
+      <Tooltip>
+        <TooltipTrigger asChild>{trigger}</TooltipTrigger>
+        <TooltipContent side="bottom" sideOffset={4} align="center">
           <span className="font-mono text-xs tabular-nums text-stat-value">{label}</span>
-        </div>
-      </CursorFollow>
-    </CursorProvider>
+        </TooltipContent>
+      </Tooltip>
+    </TooltipProvider>
   );
 }
 

frontend/src/components/sidebar/__tests__/StackRow.test.tsx

@@ -43,17 +43,15 @@ describe('StackRow', () => {
   });
 
   it('wraps the partial pill in a hover tooltip', () => {
-    // jsdom does not mount the cursor-follow label, so assert the PT trigger is
-    // wrapped in the RowTooltip cursor-container; the visible "3/5 running"
-    // tooltip text is verified in the Playwright drive.
     const { container } = render(<StackRow {...base({ status: 'partial', running: 3, total: 5 })} />);
-    expect(screen.getByText('PT').closest('[data-slot="cursor-container"]')).not.toBeNull();
-    expect(container.querySelector('[data-slot="cursor-container"]')).not.toBeNull();
+    const trigger = screen.getByText('PT');
+    // Radix TooltipTrigger adds data-state to the wrapped element.
+    expect(trigger.getAttribute('data-state')).toBe('closed');
   });
 
   it('does not wrap a non-partial pill in a tooltip', () => {
     render(<StackRow {...base({ status: 'running' })} />);
-    expect(screen.getByText('UP').closest('[data-slot="cursor-container"]')).toBeNull();
+    expect(screen.getByText('UP').getAttribute('data-state')).toBeNull();
   });
 
   it('renders cyan rail only when active', () => {
@@ -103,12 +101,12 @@ describe('StackRow', () => {
   });
 
   // ── Image-update check status indicator ────────────────────────────────
-  // status='running' renders the pill as plain text (no tooltip), so the only
-  // cursor-container in these rows is the trailing update/check indicator.
 
   it('shows a muted check-failed indicator when the last check failed and there is no update', () => {
     const { container } = render(<StackRow {...base({ status: 'running', hasUpdate: false, checkStatus: 'failed', lastError: 'Registry unreachable' })} />);
-    expect(container.querySelector('[data-slot="cursor-container"]')).not.toBeNull();
+    // The trailing slot renders a tooltip-wrapped AlertCircle icon (an SVG).
+    const trailingSlot = container.querySelector('[data-state="closed"]');
+    expect(trailingSlot).not.toBeNull();
     // It is not the update dot.
     expect(container.querySelector('.bg-update')).toBeNull();
   });
@@ -120,7 +118,7 @@ describe('StackRow', () => {
 
   it('shows no trailing indicator for a clean ok check with no update', () => {
     const { container } = render(<StackRow {...base({ status: 'running', hasUpdate: false, checkStatus: 'ok' })} />);
-    expect(container.querySelector('[data-slot="cursor-container"]')).toBeNull();
+    expect(container.querySelector('.lucide-alert-circle')).toBeNull();
     expect(container.querySelector('.bg-update')).toBeNull();
   });
 });