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/projects/ProjectActionsSection.tsx

@@ -362,7 +362,7 @@ export const ProjectActionsSection: React.FC<ProjectActionsSectionProps> = ({ pr
                                 placeholder={t('settings.projects.actions.field.overrideUrlPlaceholder')}
                                 className="h-7 w-full max-w-[24rem]"
                               />
-                              <Tooltip delayDuration={1000}>
+                              <Tooltip>
                                 <TooltipTrigger asChild>
                                   <RiInformationLine className="h-3.5 w-3.5 shrink-0 text-muted-foreground/60 cursor-help" />
                                 </TooltipTrigger>