fix(rtl): anchor floating menus with logical start/end instead of left/right

Popovers and dropdown menus across the app (sub-address helper, calendar
toolbar/color pickers, contact/template/attachment menus, rich text editor
color and table pickers, unsubscribe confirmation, composer send menu)
were anchored with physical `left-0`/`right-0`. In RTL locales those
don't flip with the trigger, so the menu detaches from the button that
opened it. Switched to Tailwind's logical `start-0`/`end-0` (and the
matching `rounded-s-*`/`rounded-e-*` corners on hover-action overlays)
so they mirror correctly for RTL locales (ar, he, fa) while staying
identical in LTR.

components/contacts/contact-detail.tsx

@@ -571,7 +571,7 @@ function MoreActionsMenu({ items, label }: { items: MoreItem[]; label: string })
       {open && (
         <div
           role="menu"
-          className="absolute right-0 top-full mt-1 z-30 min-w-[200px] rounded-md border border-border bg-popover text-popover-foreground shadow-lg py-1 animate-in fade-in-0 zoom-in-95 duration-100"
+          className="absolute end-0 top-full mt-1 z-30 min-w-[200px] rounded-md border border-border bg-popover text-popover-foreground shadow-lg py-1 animate-in fade-in-0 zoom-in-95 duration-100"
         >
           {items.map((item, i) => {
             if (item.separator) {

components/contacts/contacts-sidebar.tsx

@@ -284,7 +284,7 @@ export function ContactsSidebar({
           {showMenu && (
             <div
               ref={menuRef}
-              className="absolute right-0 top-full mt-1 w-44 rounded-md border border-border bg-background text-foreground shadow-md z-50 py-1"
+              className="absolute end-0 top-full mt-1 w-44 rounded-md border border-border bg-background text-foreground shadow-md z-50 py-1"
             >
               <button
                 className="w-full flex items-center gap-2 px-3 py-1.5 text-sm hover:bg-accent transition-colors text-start"