diff --git a/components/calendar/calendar-toolbar.tsx b/components/calendar/calendar-toolbar.tsx
index 0a129663..d26f8686 100644
--- a/components/calendar/calendar-toolbar.tsx
+++ b/components/calendar/calendar-toolbar.tsx
@@ -201,7 +201,7 @@ export function CalendarToolbar({
                   <CalendarDays className="w-4 h-4" />
                 </button>
                 {showCalendarDropdown && (
-                  <div className="absolute top-full right-0 mt-1 z-50 bg-popover border border-border rounded-lg shadow-lg p-2 min-w-[180px]">
+                  <div className="absolute top-full end-0 mt-1 z-50 bg-popover border border-border rounded-lg shadow-lg p-2 min-w-[180px]">
                     <h3 className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-2 px-1">
                       {t("my_calendars")}
                     </h3>
@@ -335,7 +335,7 @@ export function CalendarToolbar({
             <ChevronDown className="w-3 h-3 ms-1" />
           </Button>
           {showImportDropdown && (
-            <div className="absolute top-full right-0 mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-1 min-w-[180px]">
+            <div className="absolute top-full end-0 mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-1 min-w-[180px]">
               {onImport && (
                 <button
                   onClick={() => { onImport(); setShowImportDropdown(false); }}
diff --git a/components/contacts/contact-detail.tsx b/components/contacts/contact-detail.tsx
index 9cf0d4d5..c4160b7e 100644
--- a/components/contacts/contact-detail.tsx
+++ b/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) {
diff --git a/components/contacts/contacts-sidebar.tsx b/components/contacts/contacts-sidebar.tsx
index 80fc4b40..5831e1b2 100644
--- a/components/contacts/contacts-sidebar.tsx
+++ b/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"
diff --git a/components/email/email-composer.tsx b/components/email/email-composer.tsx
index 9d7a1126..f925a8d2 100644
--- a/components/email/email-composer.tsx
+++ b/components/email/email-composer.tsx
@@ -2664,7 +2664,7 @@ export function EmailComposer({
                 {showSendMenu && (
                   <div
                     role="menu"
-                    className="absolute right-0 bottom-full z-50 mb-2 min-w-44 rounded-md border border-border bg-popover p-1 text-popover-foreground shadow-lg"
+                    className="absolute end-0 bottom-full z-50 mb-2 min-w-44 rounded-md border border-border bg-popover p-1 text-popover-foreground shadow-lg"
                   >
                     <button
                       type="button"
diff --git a/components/email/email-viewer.tsx b/components/email/email-viewer.tsx
index 2de6340a..e45dab33 100644
--- a/components/email/email-viewer.tsx
+++ b/components/email/email-viewer.tsx
@@ -3795,7 +3795,7 @@ export function EmailViewer({
                         </div>
                         <div className={cn(
                           "absolute bg-background/95 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center gap-1 px-1.5 rounded-md",
-                          thumbUrl ? "top-1 right-1" : "inset-y-0 right-0 rounded-l-none rounded-r-md",
+                          thumbUrl ? "top-1 end-1" : "inset-y-0 end-0 rounded-s-none rounded-e-md",
                         )}>
                           <button
                             className="p-1 hover:bg-accent rounded transition-colors"
@@ -3832,7 +3832,7 @@ export function EmailViewer({
                   {showAllBesideAttachments && effectiveAttachments.length > 2 && (
                     <>
                       <div className="fixed inset-0 z-40" onClick={() => setShowAllBesideAttachments(false)} />
-                      <div className="absolute top-full right-0 mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-2 flex flex-col gap-1 min-w-[220px]">
+                      <div className="absolute top-full end-0 mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-2 flex flex-col gap-1 min-w-[220px]">
                         {effectiveAttachments.slice(2).map((attachment) => {
                           const FileIcon = getFileIcon(attachment.name || undefined, attachment.type);
                           const isPreviewable = isFilePreviewable(attachment.name || undefined, attachment.type);
@@ -3856,7 +3856,7 @@ export function EmailViewer({
                               <span className="text-[10px] text-muted-foreground ms-auto flex-shrink-0">
                                 {formatFileSize(attachment.size)}
                               </span>
-                              <div className="absolute inset-y-0 right-0 rounded-r-md bg-background/95 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center gap-1 px-1.5">
+                              <div className="absolute inset-y-0 end-0 rounded-e-md bg-background/95 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center gap-1 px-1.5">
                                 <button
                                   className="p-1 hover:bg-accent rounded transition-colors"
                                   title={t('download')}
@@ -4576,7 +4576,7 @@ export function EmailViewer({
                   </div>
                   <div className={cn(
                     "absolute rounded-md bg-background/95 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center gap-1 px-1.5",
-                    thumbUrl ? "top-1 right-1" : "inset-y-0 right-0 rounded-r-md rounded-l-none",
+                    thumbUrl ? "top-1 end-1" : "inset-y-0 end-0 rounded-e-md rounded-s-none",
                   )}>
                     <button
                       className="p-1 hover:bg-accent rounded transition-colors"
@@ -4613,7 +4613,7 @@ export function EmailViewer({
             {showAllBelowHeaderAttachments && visibleBelowHeaderCount !== null && effectiveAttachments.length > visibleBelowHeaderCount && (
               <>
                 <div className="fixed inset-0 z-40" onClick={() => setShowAllBelowHeaderAttachments(false)} />
-                <div className="absolute top-full right-0 mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-2 flex flex-col gap-1 min-w-[260px] max-h-[60vh] overflow-y-auto">
+                <div className="absolute top-full end-0 mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-2 flex flex-col gap-1 min-w-[260px] max-h-[60vh] overflow-y-auto">
                   {effectiveAttachments.slice(visibleBelowHeaderCount).map((attachment) => {
                     const FileIcon = getFileIcon(attachment.name || undefined, attachment.type);
                     const isPreviewable = isFilePreviewable(attachment.name || undefined, attachment.type);
@@ -4637,7 +4637,7 @@ export function EmailViewer({
                         <span className="text-xs text-muted-foreground ms-auto flex-shrink-0">
                           {formatFileSize(attachment.size)}
                         </span>
-                        <div className="absolute inset-y-0 right-0 rounded-r-md bg-background/95 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center gap-1 px-1.5">
+                        <div className="absolute inset-y-0 end-0 rounded-e-md bg-background/95 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center gap-1 px-1.5">
                           <button
                             className="p-1 hover:bg-accent rounded transition-colors"
                             title={t('download')}
@@ -4717,7 +4717,7 @@ export function EmailViewer({
                     </div>
                     <div className={cn(
                       "absolute bg-background/95 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center gap-1 px-1.5 rounded-md",
-                      thumbUrl ? "top-1 right-1" : "inset-y-0 right-0 rounded-l-none rounded-r-md",
+                      thumbUrl ? "top-1 end-1" : "inset-y-0 end-0 rounded-s-none rounded-e-md",
                     )}>
                       <button
                         className="p-1 hover:bg-accent rounded transition-colors"
@@ -4753,7 +4753,7 @@ export function EmailViewer({
               {showAllMobileAttachments && effectiveAttachments.length > 2 && (
                 <>
                   <div className="fixed inset-0 z-40" onClick={() => setShowAllMobileAttachments(false)} />
-                  <div className="absolute top-full left-0 mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-2 flex flex-col gap-1 min-w-[220px]">
+                  <div className="absolute top-full start-0 mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-2 flex flex-col gap-1 min-w-[220px]">
                     {effectiveAttachments.slice(2).map((attachment) => {
                       const FileIcon = getFileIcon(attachment.name || undefined, attachment.type);
                       const isPreviewable = isFilePreviewable(attachment.name || undefined, attachment.type);
@@ -4777,7 +4777,7 @@ export function EmailViewer({
                           <span className="text-[10px] text-muted-foreground ms-auto flex-shrink-0">
                             {formatFileSize(attachment.size)}
                           </span>
-                          <div className="absolute inset-y-0 right-0 rounded-r-md bg-background/95 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center gap-1 px-1.5">
+                          <div className="absolute inset-y-0 end-0 rounded-e-md bg-background/95 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center gap-1 px-1.5">
                             <button
                               className="p-1 hover:bg-accent rounded transition-colors"
                               title={t('download')}
diff --git a/components/email/rich-text-editor.tsx b/components/email/rich-text-editor.tsx
index f59704d4..c0e54519 100644
--- a/components/email/rich-text-editor.tsx
+++ b/components/email/rich-text-editor.tsx
@@ -418,7 +418,7 @@ export function RichTextEditor({
             <Baseline className="w-4 h-4" style={{ color: editor.getAttributes("textStyle").color || undefined }} />
           </ToolbarButton>
           {colorMenuOpen && (
-            <div className="absolute z-50 top-full left-0 mt-1 bg-popover border border-border rounded-md shadow-md p-2">
+            <div className="absolute z-50 top-full start-0 mt-1 bg-popover border border-border rounded-md shadow-md p-2">
               <div className="grid gap-0.5" style={{ gridTemplateColumns: "repeat(8, 1fr)" }}>
                 {TEXT_COLORS.map((color) => (
                   <button
@@ -559,7 +559,7 @@ export function RichTextEditor({
             <TableIcon className="w-4 h-4" />
           </ToolbarButton>
           {tableMenuOpen && (
-            <div className="absolute z-50 top-full left-0 mt-1 bg-popover border border-border rounded-md shadow-md p-2 min-w-[200px]">
+            <div className="absolute z-50 top-full start-0 mt-1 bg-popover border border-border rounded-md shadow-md p-2 min-w-[200px]">
               {editor.isActive("table") ? (
                 <div className="flex flex-col gap-0.5">
                   <button
diff --git a/components/email/unsubscribe-banner.tsx b/components/email/unsubscribe-banner.tsx
index 01a53dad..491f3c44 100644
--- a/components/email/unsubscribe-banner.tsx
+++ b/components/email/unsubscribe-banner.tsx
@@ -147,7 +147,7 @@ export function UnsubscribeBanner({
         {showConfirm && isDesktop && (
           <div
             ref={popoverRef}
-            className="absolute top-full left-0 mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-3 min-w-[220px]"
+            className="absolute top-full start-0 mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-3 min-w-[220px]"
           >
             <p className="text-sm text-foreground mb-2">
               {t('email_viewer.unsubscribe_banner.confirm_title')}
diff --git a/components/identity/sub-address-helper.tsx b/components/identity/sub-address-helper.tsx
index 02d8e0fe..50836dc6 100644
--- a/components/identity/sub-address-helper.tsx
+++ b/components/identity/sub-address-helper.tsx
@@ -137,7 +137,7 @@ export function SubAddressHelper({
         <div
           ref={popoverRef}
           className={cn(
-            'absolute top-full right-0 mt-1 z-50',
+            'absolute top-full end-0 mt-1 z-50',
             'bg-background border border-border rounded-lg shadow-lg',
             'w-80 p-4 animate-in fade-in zoom-in-95 duration-150'
           )}
diff --git a/components/settings/calendar-management-settings.tsx b/components/settings/calendar-management-settings.tsx
index 31b09af2..82eaed98 100644
--- a/components/settings/calendar-management-settings.tsx
+++ b/components/settings/calendar-management-settings.tsx
@@ -475,7 +475,7 @@ export function CalendarManagementSettings() {
                 {colorPickerId === cal.id && (
                   <div
                     ref={colorPickerRef}
-                    className="absolute left-0 top-full mt-2 z-50 bg-background border border-border rounded-lg shadow-lg p-3 w-56"
+                    className="absolute start-0 top-full mt-2 z-50 bg-background border border-border rounded-lg shadow-lg p-3 w-56"
                   >
                     <CalendarColorPicker
                       value={color}
diff --git a/components/settings/folder-settings.tsx b/components/settings/folder-settings.tsx
index 80b1b0db..98f531ad 100644
--- a/components/settings/folder-settings.tsx
+++ b/components/settings/folder-settings.tsx
@@ -90,7 +90,7 @@ function IconPicker({ currentIcon, onSelect, onClose }: {
   return (
     <div
       ref={ref}
-      className="absolute left-0 top-full mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-2 grid grid-cols-6 gap-1 w-52"
+      className="absolute start-0 top-full mt-1 z-50 bg-background border border-border rounded-lg shadow-lg p-2 grid grid-cols-6 gap-1 w-52"
     >
       {ICON_CHOICES.map(({ name, icon: Icon }) => (
         <button
diff --git a/components/templates/template-form.tsx b/components/templates/template-form.tsx
index 71c60a37..93f3f65f 100644
--- a/components/templates/template-form.tsx
+++ b/components/templates/template-form.tsx
@@ -285,7 +285,7 @@ function PlaceholderDropdown({
   return (
     <>
       <div className="fixed inset-0 z-40" onClick={onClose} />
-      <div className="absolute right-0 top-full mt-1 z-50 bg-background border border-border rounded-md shadow-lg min-w-[180px]">
+      <div className="absolute end-0 top-full mt-1 z-50 bg-background border border-border rounded-md shadow-lg min-w-[180px]">
         <div className="p-1">
           {BUILT_IN_PLACEHOLDERS.map((p) => (
             <button