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/components/sections/magic-prompts/MagicPromptsPage.tsx

@@ -267,7 +267,7 @@ export const MagicPromptsPage: React.FC = () => {
           <div className="space-y-1">
             <div className="flex items-center gap-2">
               <h2 className="typography-ui-header font-semibold text-foreground">{tUnsafe(pageConfig.titleKey)}</h2>
-              <Tooltip delayDuration={700}>
+              <Tooltip>
                 <TooltipTrigger asChild>
                   <RiInformationLine className="h-3.5 w-3.5 text-muted-foreground/60 cursor-help" />
                 </TooltipTrigger>
@@ -304,7 +304,7 @@ export const MagicPromptsPage: React.FC = () => {
               <div className="space-y-1">
                 <div className="flex flex-wrap items-center gap-2">
                   <h3 className="typography-ui-label text-foreground">{tUnsafe(block.titleKey)}</h3>
-                  <Tooltip delayDuration={700}>
+                  <Tooltip>
                     <TooltipTrigger asChild>
                       <RiInformationLine className="h-3.5 w-3.5 text-muted-foreground/60 cursor-help" />
                     </TooltipTrigger>