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/views/git/SyncActions.tsx

@@ -29,7 +29,6 @@ interface SyncActionsProps {
   disabled: boolean;
   removingRemoteName?: string | null;
   iconOnly?: boolean;
-  tooltipDelayMs?: number;
   aheadCount?: number;
   behindCount?: number;
 }
@@ -44,7 +43,6 @@ export const SyncActions: React.FC<SyncActionsProps> = ({
   disabled,
   removingRemoteName = null,
   iconOnly = false,
-  tooltipDelayMs = 1000,
   aheadCount = 0,
   behindCount = 0,
 }) => {
@@ -108,7 +106,7 @@ export const SyncActions: React.FC<SyncActionsProps> = ({
     );
 
     return (
-      <Tooltip delayDuration={tooltipDelayMs}>
+      <Tooltip>
         <TooltipTrigger asChild>{button}</TooltipTrigger>
         <TooltipContent sideOffset={8}>{tooltipText}</TooltipContent>
       </Tooltip>
@@ -126,7 +124,7 @@ export const SyncActions: React.FC<SyncActionsProps> = ({
   ) => {
     return (
       <DropdownMenu>
-        <Tooltip delayDuration={tooltipDelayMs}>
+        <Tooltip>
           <TooltipTrigger asChild>
             <DropdownMenuTrigger asChild>
               <Button