feat(ui): unify overlay animations and trim tooltip delays

Use base-ui's transition-status pattern (data-starting-style /
data-ending-style) for Dialog, DropdownMenu, Select, Tooltip and Popover
so open/close animate consistently at 150ms ease-out without flicker.
Wrap dialog popups in a centered flex container so the scale animation
no longer fights with translate-based positioning, and switch
PendingChangesBar to a real Popover so it actually animates closed.

Convert ScheduledTaskEditorDialog from raw Radix to the shared Dialog
wrapper, give ScheduledTasksDialog a stable min-height to prevent layout
shift mid-animation, and reset NewWorktreeDialog form state on open
instead of close so fields don't empty during the close transition.

Drop tooltip delay from 700ms to 300ms globally and remove all
per-component overrides except the model/variant/agent selectors in the
chat input (600ms).

packages/ui/src/App.tsx

@@ -828,7 +828,7 @@ function App({ apis }: AppProps) {
       <ErrorBoundary>
         <SyncProvider sdk={opencodeClient.getSdkClient()} directory={currentDirectory || ''}>
           <RuntimeAPIProvider apis={apis}>
-            <TooltipProvider delayDuration={700} skipDelayDuration={150}>
+            <TooltipProvider delayDuration={300} skipDelayDuration={150}>
               <div className="h-full text-foreground bg-background">
                 <EmbeddedSessionSelectionGate embeddedSessionChat={embeddedSessionChat} isVSCodeRuntime={isVSCodeRuntime} />
                 <SyncAppEffects embeddedBackgroundWorkEnabled={embeddedBackgroundWorkEnabled} />
@@ -873,7 +873,7 @@ function App({ apis }: AppProps) {
       <ErrorBoundary>
         <SyncProvider sdk={opencodeClient.getSdkClient()} directory={currentDirectory || ''}>
           <RuntimeAPIProvider apis={apis}>
-            <TooltipProvider delayDuration={700} skipDelayDuration={150}>
+            <TooltipProvider delayDuration={300} skipDelayDuration={150}>
               <div className="h-full text-foreground bg-background">
                 <SyncAppEffects embeddedBackgroundWorkEnabled={embeddedBackgroundWorkEnabled} />
                 <AgentManagerView />
@@ -891,7 +891,7 @@ function App({ apis }: AppProps) {
         <SyncProvider sdk={opencodeClient.getSdkClient()} directory={currentDirectory || ''}>
           <RuntimeAPIProvider apis={apis}>
             <FireworksProvider>
-              <TooltipProvider delayDuration={700} skipDelayDuration={150}>
+              <TooltipProvider delayDuration={300} skipDelayDuration={150}>
                 <div className="h-full text-foreground bg-background">
                   <SyncAppEffects embeddedBackgroundWorkEnabled={embeddedBackgroundWorkEnabled} />
                   <VSCodeLayout />
@@ -916,7 +916,7 @@ function App({ apis }: AppProps) {
         <RuntimeAPIProvider apis={apis}>
           <FireworksProvider>
             <VoiceProvider>
-              <TooltipProvider delayDuration={700} skipDelayDuration={150}>
+              <TooltipProvider delayDuration={300} skipDelayDuration={150}>
                 <div className={isDesktopRuntime ? 'h-full text-foreground bg-transparent' : 'h-full text-foreground bg-background'}>
                   <SyncAppEffects embeddedBackgroundWorkEnabled={embeddedBackgroundWorkEnabled} />
                   <MainLayout />