diff --git a/web/src/components/ActionBar.vue b/web/src/components/ActionBar.vue
index 14273d69..eee9c40d 100644
--- a/web/src/components/ActionBar.vue
+++ b/web/src/components/ActionBar.vue
@@ -304,7 +304,7 @@ const hasRightOverflow = computed(() => {
             <Tooltip>
               <TooltipTrigger as-child>
                 <Button variant="ghost" size="sm" class="h-8 gap-1.5 text-xs" @click="msdDialogOpen = true">
-                  <HardDrive class="h-4 w-4" />
+                  <HardDrive class="size-4" />
                   <span v-if="visibleSet.get('msd') === 'label'">{{ t('actionbar.virtualMedia') }}</span>
                 </Button>
               </TooltipTrigger>
@@ -320,7 +320,7 @@ const hasRightOverflow = computed(() => {
           <Popover v-model:open="atxOpen">
             <PopoverTrigger as-child>
               <Button variant="ghost" size="sm" class="h-8 gap-1.5 text-xs">
-                <Power class="h-4 w-4" />
+                <Power class="size-4" />
                 <span v-if="visibleSet.get('atx') === 'label'">{{ t('actionbar.power') }}</span>
               </Button>
             </PopoverTrigger>
@@ -341,7 +341,7 @@ const hasRightOverflow = computed(() => {
           <Popover v-model:open="pasteOpen">
             <PopoverTrigger as-child>
               <Button variant="ghost" size="sm" class="h-8 gap-1.5 text-xs">
-                <ClipboardPaste class="h-4 w-4" />
+                <ClipboardPaste class="size-4" />
                 <span v-if="visibleSet.get('paste') === 'label'">{{ t('actionbar.paste') }}</span>
               </Button>
             </PopoverTrigger>
@@ -360,7 +360,7 @@ const hasRightOverflow = computed(() => {
             <Tooltip>
               <TooltipTrigger as-child>
                 <Button variant="ghost" size="sm" class="h-8 gap-1.5 text-xs" @click="emit('toggleStats')">
-                  <BarChart3 class="h-4 w-4" />
+                  <BarChart3 class="size-4" />
                   <span v-if="visibleSet.get('stats') === 'label'">{{ t('actionbar.stats') }}</span>
                 </Button>
               </TooltipTrigger>
@@ -383,7 +383,7 @@ const hasRightOverflow = computed(() => {
                   :disabled="!props.ttydRunning"
                   @click="emit('openTerminal')"
                 >
-                  <Terminal class="h-4 w-4" />
+                  <Terminal class="size-4" />
                   <span v-if="visibleSet.get('terminal') === 'label'">{{ t('actionbar.webTerminal') }}</span>
                 </Button>
               </TooltipTrigger>
@@ -401,10 +401,10 @@ const hasRightOverflow = computed(() => {
               <Button
                 variant="ghost"
                 size="sm"
-                class="h-7 w-7 sm:h-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs"
+                class="size-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs"
                 @click="emit('openComputerUse')"
               >
-                <Bot class="h-3.5 w-3.5 sm:h-4 sm:w-4" />
+                <Bot class="size-3.5 sm:size-4" />
                 <span class="hidden xl:inline">AI</span>
               </Button>
             </TooltipTrigger>
@@ -420,7 +420,7 @@ const hasRightOverflow = computed(() => {
             <Tooltip>
               <TooltipTrigger as-child>
                 <Button variant="ghost" size="sm" class="h-8 gap-1.5 text-xs" @click="router.push('/settings')">
-                  <Settings class="h-4 w-4" />
+                  <Settings class="size-4" />
                   <span v-if="visibleSet.get('settings') === 'label'">{{ t('actionbar.settings') }}</span>
                 </Button>
               </TooltipTrigger>
@@ -444,10 +444,10 @@ const hasRightOverflow = computed(() => {
               <Button
                 variant="ghost"
                 size="sm"
-                class="h-7 w-7 sm:h-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs"
+                class="size-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs"
                 @click="emit('toggleVirtualKeyboard')"
               >
-                <Keyboard class="h-3.5 w-3.5 sm:h-4 sm:w-4" />
+                <Keyboard class="size-3.5 sm:size-4" />
                 <span class="hidden xl:inline">{{ t('actionbar.keyboard') }}</span>
               </Button>
             </TooltipTrigger>
@@ -464,10 +464,10 @@ const hasRightOverflow = computed(() => {
               <Button
                 variant="ghost"
                 size="sm"
-                class="h-7 w-7 sm:h-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs"
+                class="size-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs"
                 @click="emit('toggleFullscreen')"
               >
-                <Maximize class="h-3.5 w-3.5 sm:h-4 sm:w-4" />
+                <Maximize class="size-3.5 sm:size-4" />
                 <span class="hidden xl:inline">{{ t('actionbar.fullscreen') }}</span>
               </Button>
             </TooltipTrigger>
@@ -480,26 +480,26 @@ const hasRightOverflow = computed(() => {
         <!-- Overflow Menu - Only show if there are overflowed items -->
         <DropdownMenu v-if="hasOverflow" v-model:open="overflowMenuOpen">
           <DropdownMenuTrigger as-child>
-            <Button variant="ghost" size="sm" class="h-7 w-7 sm:h-8 sm:w-8 p-0">
-              <MoreHorizontal class="h-3.5 w-3.5 sm:h-4 sm:w-4" />
+            <Button variant="ghost" size="sm" class="size-8 p-0">
+              <MoreHorizontal class="size-3.5 sm:size-4" />
             </Button>
           </DropdownMenuTrigger>
           <DropdownMenuContent align="end" class="w-48">
             <!-- MSD -->
             <DropdownMenuItem v-if="showMsd && !isVisible('msd')" @click="openFromOverflow(() => msdDialogOpen = true)">
-              <HardDrive class="h-4 w-4 mr-2" />
+              <HardDrive class="size-4 mr-2" />
               {{ t('actionbar.virtualMedia') }}
             </DropdownMenuItem>
 
             <!-- ATX -->
             <DropdownMenuItem v-if="showAtx && !isVisible('atx')" @click="openMobileAtx">
-              <Power class="h-4 w-4 mr-2" />
+              <Power class="size-4 mr-2" />
               {{ t('actionbar.power') }}
             </DropdownMenuItem>
 
             <!-- Paste -->
             <DropdownMenuItem v-if="showPasteText && !isVisible('paste')" @click="openMobilePaste">
-              <ClipboardPaste class="h-4 w-4 mr-2" />
+              <ClipboardPaste class="size-4 mr-2" />
               {{ t('actionbar.paste') }}
             </DropdownMenuItem>
 
@@ -507,7 +507,7 @@ const hasRightOverflow = computed(() => {
 
             <!-- Stats -->
             <DropdownMenuItem v-if="showStats && !isVisible('stats')" @click="openFromOverflow(() => emit('toggleStats'))">
-              <BarChart3 class="h-4 w-4 mr-2" />
+              <BarChart3 class="size-4 mr-2" />
               {{ t('actionbar.stats') }}
             </DropdownMenuItem>
 
@@ -517,13 +517,13 @@ const hasRightOverflow = computed(() => {
               :disabled="!props.ttydRunning"
               @click="openFromOverflow(() => emit('openTerminal'))"
             >
-              <Terminal class="h-4 w-4 mr-2" />
+              <Terminal class="size-4 mr-2" />
               {{ t('actionbar.webTerminal') }}
             </DropdownMenuItem>
 
             <!-- Settings -->
             <DropdownMenuItem v-if="!isVisible('settings')" @click="openFromOverflow(() => router.push('/settings'))">
-              <Settings class="h-4 w-4 mr-2" />
+              <Settings class="size-4 mr-2" />
               {{ t('actionbar.settings') }}
             </DropdownMenuItem>
           </DropdownMenuContent>
@@ -577,30 +577,30 @@ const hasRightOverflow = computed(() => {
   <div ref="measureRef" aria-hidden="true" class="fixed pointer-events-none" style="visibility: hidden; top: -9999px; left: -9999px; white-space: nowrap;">
     <div class="flex items-center gap-0.5 sm:gap-1.5 px-2 sm:px-4 py-1 sm:py-1.5">
       <!-- MSD -->
-      <Button data-measure="msd-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="h-4 w-4" /></Button>
-      <Button data-measure="msd-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="h-4 w-4" />{{ t('actionbar.virtualMedia') }}</Button>
+      <Button data-measure="msd-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="size-4" /></Button>
+      <Button data-measure="msd-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="size-4" />{{ t('actionbar.virtualMedia') }}</Button>
       <!-- ATX -->
-      <Button data-measure="atx-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Power class="h-4 w-4" /></Button>
-      <Button data-measure="atx-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Power class="h-4 w-4" />{{ t('actionbar.power') }}</Button>
+      <Button data-measure="atx-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Power class="size-4" /></Button>
+      <Button data-measure="atx-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Power class="size-4" />{{ t('actionbar.power') }}</Button>
       <!-- Paste -->
-      <Button data-measure="paste-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><ClipboardPaste class="h-4 w-4" /></Button>
-      <Button data-measure="paste-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><ClipboardPaste class="h-4 w-4" />{{ t('actionbar.paste') }}</Button>
+      <Button data-measure="paste-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><ClipboardPaste class="size-4" /></Button>
+      <Button data-measure="paste-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><ClipboardPaste class="size-4" />{{ t('actionbar.paste') }}</Button>
       <!-- Stats -->
-      <Button data-measure="stats-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><BarChart3 class="h-4 w-4" /></Button>
-      <Button data-measure="stats-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><BarChart3 class="h-4 w-4" />{{ t('actionbar.stats') }}</Button>
+      <Button data-measure="stats-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><BarChart3 class="size-4" /></Button>
+      <Button data-measure="stats-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><BarChart3 class="size-4" />{{ t('actionbar.stats') }}</Button>
       <!-- Web Terminal -->
-      <Button data-measure="terminal-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Terminal class="h-4 w-4" /></Button>
-      <Button data-measure="terminal-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Terminal class="h-4 w-4" />{{ t('actionbar.webTerminal') }}</Button>
+      <Button data-measure="terminal-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Terminal class="size-4" /></Button>
+      <Button data-measure="terminal-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Terminal class="size-4" />{{ t('actionbar.webTerminal') }}</Button>
       <!-- Settings -->
-      <Button data-measure="settings-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Settings class="h-4 w-4" /></Button>
-      <Button data-measure="settings-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Settings class="h-4 w-4" />{{ t('actionbar.settings') }}</Button>
+      <Button data-measure="settings-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Settings class="size-4" /></Button>
+      <Button data-measure="settings-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><Settings class="size-4" />{{ t('actionbar.settings') }}</Button>
       <!-- Always-visible items (for measuring their actual width) -->
-      <Button data-measure="video-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="h-4 w-4" /></Button>
-      <Button data-measure="video-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="h-4 w-4" /></Button>
-      <Button data-measure="audio-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="h-4 w-4" /></Button>
-      <Button data-measure="audio-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="h-4 w-4" /></Button>
-      <Button data-measure="hid-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="h-4 w-4" /></Button>
-      <Button data-measure="hid-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="h-4 w-4" /></Button>
+      <Button data-measure="video-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="size-4" /></Button>
+      <Button data-measure="video-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="size-4" /></Button>
+      <Button data-measure="audio-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="size-4" /></Button>
+      <Button data-measure="audio-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="size-4" /></Button>
+      <Button data-measure="hid-icon" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="size-4" /></Button>
+      <Button data-measure="hid-label" variant="ghost" size="sm" class="h-8 gap-1.5 text-xs"><HardDrive class="size-4" /></Button>
     </div>
   </div>
 </template>
diff --git a/web/src/components/AppLayout.vue b/web/src/components/AppLayout.vue
index 2cefd7db..70ffd57e 100644
--- a/web/src/components/AppLayout.vue
+++ b/web/src/components/AppLayout.vue
@@ -52,9 +52,9 @@ async function handleLogout() {
           </span>
 
           <!-- Theme Toggle -->
-          <Button variant="ghost" size="icon" class="h-8 w-8" :aria-label="t('common.toggleTheme')" @click="toggleTheme">
-            <Sun class="h-4 w-4 rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
-            <Moon class="absolute h-4 w-4 rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
+          <Button variant="ghost" size="icon-sm" :aria-label="t('common.toggleTheme')" @click="toggleTheme">
+            <Sun class="size-4 rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
+            <Moon class="absolute size-4 rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
             <span class="sr-only">{{ t('common.toggleTheme') }}</span>
           </Button>
 
@@ -64,21 +64,21 @@ async function handleLogout() {
           <!-- Mobile Menu -->
           <DropdownMenu>
             <DropdownMenuTrigger as-child class="md:hidden">
-              <Button variant="ghost" size="icon" class="h-8 w-8" :aria-label="t('common.menu')">
-                <Menu class="h-4 w-4" />
+              <Button variant="ghost" size="icon-sm" :aria-label="t('common.menu')">
+                <Menu class="size-4" />
               </Button>
             </DropdownMenuTrigger>
             <DropdownMenuContent align="end">
               <DropdownMenuItem @click="handleLogout">
-                <LogOut class="h-4 w-4 mr-2" />
+                <LogOut class="size-4 mr-2" />
                 {{ t('nav.logout') }}
               </DropdownMenuItem>
             </DropdownMenuContent>
           </DropdownMenu>
 
           <!-- Logout Button (Desktop) -->
-          <Button variant="ghost" size="icon" class="hidden md:flex h-8 w-8" :aria-label="t('nav.logout')" @click="handleLogout">
-            <LogOut class="h-4 w-4" />
+          <Button variant="ghost" size="icon-sm" class="hidden md:flex" :aria-label="t('nav.logout')" @click="handleLogout">
+            <LogOut class="size-4" />
             <span class="sr-only">{{ t('nav.logout') }}</span>
           </Button>
         </div>
diff --git a/web/src/components/AtxPopover.vue b/web/src/components/AtxPopover.vue
index 43225b4e..ca229743 100644
--- a/web/src/components/AtxPopover.vue
+++ b/web/src/components/AtxPopover.vue
@@ -30,7 +30,7 @@ const emit = defineEmits<{
 const { t } = useI18n()
 
 const activeTab = ref('atx')
-const tabTriggerClass = 'h-9 rounded-md border-0 bg-transparent text-center text-xs text-muted-foreground shadow-none hover:text-foreground data-[state=active]:border-0 data-[state=active]:bg-background data-[state=active]:text-foreground data-[state=active]:shadow-sm'
+const tabTriggerClass = 'h-8 rounded-md border-0 bg-transparent text-center text-xs text-muted-foreground shadow-none hover:text-foreground data-[state=active]:border-0 data-[state=active]:bg-background data-[state=active]:text-foreground data-[state=active]:shadow-sm'
 
 const powerState = ref<'on' | 'off' | 'unknown'>('unknown')
 const hddState = ref<'active' | 'inactive' | 'unknown'>('unknown')
@@ -199,19 +199,19 @@ watch(
 <template>
   <div class="p-2.5 space-y-2.5">
     <Tabs v-model="activeTab">
-      <TabsList class="grid h-auto w-full grid-cols-2 gap-1 rounded-md border border-border bg-muted p-1">
+      <TabsList class="grid h-auto w-full grid-cols-2 gap-1 rounded-md border border-border bg-muted p-0.5">
         <TabsTrigger
           value="atx"
           :class="tabTriggerClass"
         >
-          <Power class="h-3 w-3 mr-1" />
+          <Power class="size-3 mr-1" />
           {{ t('atx.title') }}
         </TabsTrigger>
         <TabsTrigger
           value="wol"
           :class="tabTriggerClass"
         >
-          <Wifi class="h-3 w-3 mr-1" />
+          <Wifi class="size-3 mr-1" />
           WOL
         </TabsTrigger>
       </TabsList>
@@ -221,14 +221,14 @@ watch(
         <!-- Status -->
         <div class="grid grid-cols-2 gap-2">
           <div class="flex min-w-0 items-center gap-2 rounded-md border bg-muted/40 px-2 py-1.5">
-            <Power :class="['h-4 w-4 shrink-0', powerStateIconColor]" />
+            <Power :class="['size-4 shrink-0', powerStateIconColor]" />
             <div class="min-w-0">
               <p class="truncate text-[11px] leading-none text-muted-foreground">{{ t('atx.powerState') }}</p>
               <p :class="['mt-1 truncate text-xs font-medium leading-none', powerStateTextColor]">{{ powerStateText }}</p>
             </div>
           </div>
           <div class="flex min-w-0 items-center gap-2 rounded-md border bg-muted/40 px-2 py-1.5">
-            <HardDrive :class="['h-4 w-4 shrink-0', hddStateIconColor]" />
+            <HardDrive :class="['size-4 shrink-0', hddStateIconColor]" />
             <div class="min-w-0">
               <p class="truncate text-[11px] leading-none text-muted-foreground">{{ t('atx.hddState') }}</p>
               <p :class="['mt-1 truncate text-xs font-medium leading-none', hddStateTextColor]">{{ hddStateText }}</p>
@@ -245,12 +245,12 @@ watch(
             size="sm"
             :disabled="actionBusy"
             :class="[
-              'w-full justify-start gap-2 h-7 text-xs',
+              'w-full justify-start gap-2 h-8 text-xs',
               activeAction === 'short' ? 'bg-muted text-muted-foreground' : '',
             ]"
             @click="handleAction('short')"
           >
-            <Power class="h-3 w-3" />
+            <Power class="size-3" />
             {{ t('atx.shortPress') }}
           </Button>
 
@@ -259,12 +259,12 @@ watch(
             size="sm"
             :disabled="actionBusy"
             :class="[
-              'h-7 w-full justify-start gap-2 text-xs text-warning hover:bg-warning/10 hover:text-warning',
+              'h-8 w-full justify-start gap-2 text-xs text-warning hover:bg-warning/10 hover:text-warning',
               activeAction === 'long' ? 'bg-muted text-muted-foreground hover:text-muted-foreground hover:bg-muted dark:hover:bg-muted' : '',
             ]"
             @click="handleAction('long')"
           >
-            <CircleDot class="h-3 w-3" />
+            <CircleDot class="size-3" />
             {{ t('atx.longPress') }}
           </Button>
 
@@ -273,12 +273,12 @@ watch(
             size="sm"
             :disabled="actionBusy"
             :class="[
-              'h-7 w-full justify-start gap-2 text-xs text-destructive hover:bg-destructive/10 hover:text-destructive',
+              'h-8 w-full justify-start gap-2 text-xs text-destructive hover:bg-destructive/10 hover:text-destructive',
               activeAction === 'reset' ? 'bg-muted text-muted-foreground hover:text-muted-foreground hover:bg-muted dark:hover:bg-muted' : '',
             ]"
             @click="handleAction('reset')"
           >
-            <RotateCcw class="h-3 w-3" />
+            <RotateCcw class="size-3" />
             {{ t('atx.reset') }}
           </Button>
         </div>
@@ -302,7 +302,7 @@ watch(
               :disabled="!isValidMac || wolSending"
               @click="sendWol"
             >
-              <Send class="h-3.5 w-3.5" />
+              <Send class="size-3.5" />
             </Button>
           </div>
           <p v-if="wolMacAddress && !isValidMac" class="text-xs text-destructive">
diff --git a/web/src/components/AudioConfigPopover.vue b/web/src/components/AudioConfigPopover.vue
index 56306c23..22e22c50 100644
--- a/web/src/components/AudioConfigPopover.vue
+++ b/web/src/components/AudioConfigPopover.vue
@@ -142,8 +142,8 @@ watch(() => props.open, (isOpen) => {
 <template>
   <Popover :open="open" @update:open="emit('update:open', $event)">
     <PopoverTrigger as-child>
-      <Button variant="ghost" size="sm" class="h-7 w-7 sm:h-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs">
-        <Volume2 class="h-3.5 w-3.5 sm:h-4 sm:w-4" />
+      <Button variant="ghost" size="sm" class="size-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs">
+        <Volume2 class="size-3.5 sm:size-4" />
         <span class="hidden sm:inline">{{ t('actionbar.audioConfig') }}</span>
       </Button>
     </PopoverTrigger>
@@ -166,7 +166,7 @@ watch(() => props.open, (isOpen) => {
               <span class="text-xs font-mono">{{ Math.round(localVolume[0] ?? 0) }}%</span>
             </div>
             <div class="flex items-center gap-2">
-              <Volume2 class="h-3.5 w-3.5 text-muted-foreground opacity-50" />
+              <Volume2 class="size-3.5 text-muted-foreground opacity-50" />
               <Slider
                 :model-value="localVolume"
                 @update:model-value="handleVolumeChange"
@@ -176,7 +176,7 @@ watch(() => props.open, (isOpen) => {
                 :disabled="!systemStore.audio?.streaming"
                 class="flex-1"
               />
-              <Volume2 class="h-3.5 w-3.5 text-muted-foreground" />
+              <Volume2 class="size-3.5 text-muted-foreground" />
             </div>
           </div>
         </div>
@@ -191,12 +191,11 @@ watch(() => props.open, (isOpen) => {
               </h5>
               <Button
                 variant="ghost"
-                size="icon"
-                class="h-6 w-6"
+                size="icon-xs"
                 :disabled="loadingDevices"
                 @click="loadDevices"
               >
-                <RefreshCw :class="['h-3.5 w-3.5', loadingDevices && 'animate-spin']" />
+                <RefreshCw :class="['size-3.5', loadingDevices && 'animate-spin']" />
               </Button>
             </div>
 
@@ -230,7 +229,7 @@ watch(() => props.open, (isOpen) => {
                 :model-value="selectedDevice"
                 @update:model-value="(v) => selectedDevice = v as string"
                 :disabled="loadingDevices || devices.length === 0"
-                class="h-8 w-full text-xs"
+                size="sm" class="w-full text-xs"
               >
                   <NativeSelectOption value="">{{ t('actionbar.selectAudioDevice') }}</NativeSelectOption>
                   <NativeSelectOption
@@ -281,7 +280,7 @@ watch(() => props.open, (isOpen) => {
               :disabled="applying"
               @click="applyConfig"
             >
-              <Loader2 v-if="applying" class="h-3.5 w-3.5 mr-1.5 animate-spin" />
+              <Loader2 v-if="applying" class="size-3.5 mr-1.5 animate-spin" />
               <span>{{ applying ? t('actionbar.applying') : t('common.apply') }}</span>
             </Button>
           </div>
diff --git a/web/src/components/BrandMark.vue b/web/src/components/BrandMark.vue
index 1fe6e7e7..a527c6a8 100644
--- a/web/src/components/BrandMark.vue
+++ b/web/src/components/BrandMark.vue
@@ -13,17 +13,17 @@ const props = withDefaults(
 const dim = computed(() => {
   switch (props.size) {
     case 'xs':
-      return 'h-4 w-4'
+      return 'size-4'
     case 'sm':
-      return 'h-5 w-5'
+      return 'size-5'
     case 'md':
-      return 'h-6 w-6'
+      return 'size-6'
     case 'lg':
-      return 'h-10 w-10'
+      return 'size-10'
     case 'xl':
-      return 'h-14 w-14'
+      return 'size-14'
     default:
-      return 'h-6 w-6'
+      return 'size-6'
   }
 })
 </script>
diff --git a/web/src/components/ComputerUseSheet.vue b/web/src/components/ComputerUseSheet.vue
index bf4fd1dc..d60a9858 100644
--- a/web/src/components/ComputerUseSheet.vue
+++ b/web/src/components/ComputerUseSheet.vue
@@ -18,6 +18,7 @@ import {
 } from 'lucide-vue-next'
 import { toast } from 'vue-sonner'
 import { computerUseApi, type ComputerUseAction, type ComputerUseConfig, type ComputerUseSession } from '@/api'
+import { ApiError } from '@/api/request'
 import type { ComputerUseTimelineItem } from '@/types/computerUseTimeline'
 import { Button } from '@/components/ui/button'
 import { Input } from '@/components/ui/input'
@@ -107,6 +108,8 @@ async function loadConfig() {
   try {
     config.value = await computerUseApi.config()
   } catch (err) {
+    // Auth failures are handled globally (redirect to login); don't toast over it.
+    if (err instanceof ApiError && err.status === 401) return
     toast.error(t('computerUse.errors.configLoadFailed'), {
       description: err instanceof Error ? err.message : undefined,
     })
@@ -217,15 +220,15 @@ onMounted(loadConfig)
   >
     <div class="flex h-full min-h-0 flex-col">
       <header class="flex h-12 shrink-0 items-center gap-2 border-b px-3">
-        <Bot class="h-5 w-5 shrink-0" />
+        <Bot class="size-5 shrink-0" />
         <div class="min-w-0 flex-1">
           <div class="truncate text-sm font-semibold">{{ t('computerUse.title') }}</div>
           <div
             class="flex min-w-0 items-center gap-1 text-[11px]"
             :class="connected ? 'text-emerald-600 dark:text-emerald-400' : 'text-muted-foreground'"
           >
-            <Wifi v-if="connected" class="h-3 w-3 shrink-0" />
-            <WifiOff v-else class="h-3 w-3 shrink-0" />
+            <Wifi v-if="connected" class="size-3 shrink-0" />
+            <WifiOff v-else class="size-3 shrink-0" />
             <span class="truncate">
               {{ connected ? t('computerUse.connection.connected') : (wsError || t('computerUse.connection.disconnected')) }}
             </span>
@@ -235,39 +238,39 @@ onMounted(loadConfig)
         <Button
           variant="ghost"
           size="icon"
-          class="h-8 w-8"
+          class="size-8"
           :title="t('computerUse.buttons.settings')"
           :aria-label="t('computerUse.buttons.settings')"
           @click="settingsOpen = true"
         >
-          <Settings class="h-4 w-4" />
+          <Settings class="size-4" />
         </Button>
         <Button
           variant="ghost"
           size="icon"
-          class="h-8 w-8"
+          class="size-8"
           :title="t('computerUse.buttons.clear')"
           :aria-label="t('computerUse.buttons.clear')"
           :disabled="isRunning || timeline.length === 0"
           @click="emit('clear')"
         >
-          <Trash2 class="h-4 w-4" />
+          <Trash2 class="size-4" />
         </Button>
         <Button
           variant="ghost"
           size="icon"
-          class="h-8 w-8"
+          class="size-8"
           :title="t('computerUse.buttons.close')"
           :aria-label="t('computerUse.buttons.close')"
           @click="emit('update:open', false)"
         >
-          <X class="h-4 w-4" />
+          <X class="size-4" />
         </Button>
       </header>
 
       <div ref="messagesRef" class="min-h-0 flex-1 overflow-y-auto px-4 py-4">
         <div v-if="timeline.length === 0" class="flex h-full items-center justify-center text-muted-foreground/45">
-          <Bot class="h-10 w-10" />
+          <Bot class="size-10" />
         </div>
 
         <div v-else class="space-y-5">
@@ -288,9 +291,9 @@ onMounted(loadConfig)
                 class="flex w-full items-center gap-1.5 py-1 text-left font-medium hover:text-foreground"
                 @click="toggleReasoning(item)"
               >
-                <ChevronDown v-if="reasoningOpen(item)" class="h-3.5 w-3.5 shrink-0" />
-                <ChevronRight v-else class="h-3.5 w-3.5 shrink-0" />
-                <BrainCircuit class="h-3.5 w-3.5 shrink-0" />
+                <ChevronDown v-if="reasoningOpen(item)" class="size-3.5 shrink-0" />
+                <ChevronRight v-else class="size-3.5 shrink-0" />
+                <BrainCircuit class="size-3.5 shrink-0" />
                 <span>
                   {{ item.failed
                     ? t('computerUse.reasoning.failed')
@@ -308,7 +311,7 @@ onMounted(loadConfig)
             <div v-else-if="item.type === 'screenshot'" class="overflow-hidden rounded-md border bg-card">
               <div class="flex items-center justify-between border-b px-2.5 py-1.5 text-[11px] text-muted-foreground">
                 <span class="inline-flex items-center gap-1.5">
-                  <Image class="h-3.5 w-3.5" />{{ t('computerUse.trace.screenshot') }}
+                  <Image class="size-3.5" />{{ t('computerUse.trace.screenshot') }}
                 </span>
                 <span>{{ item.screenshot.width }}x{{ item.screenshot.height }}</span>
               </div>
@@ -363,24 +366,24 @@ onMounted(loadConfig)
           <Button
             v-if="!isRunning"
             size="icon"
-            class="absolute bottom-2 right-2 h-8 w-8"
+            class="absolute bottom-2 right-2 size-8"
             :title="t('computerUse.buttons.send')"
             :aria-label="t('computerUse.buttons.send')"
             :disabled="!canStart || starting"
             @click="start"
           >
-            <SendHorizontal class="h-4 w-4" />
+            <SendHorizontal class="size-4" />
           </Button>
           <Button
             v-else
             size="icon"
             variant="destructive"
-            class="absolute bottom-2 right-2 h-8 w-8"
+            class="absolute bottom-2 right-2 size-8"
             :title="t('computerUse.buttons.stop')"
             :aria-label="t('computerUse.buttons.stop')"
             @click="emit('stop')"
           >
-            <Square class="h-3.5 w-3.5 fill-current" />
+            <Square class="size-3.5 fill-current" />
           </Button>
         </div>
         <p v-if="config && !config.api_key_configured" class="mt-2 text-xs text-muted-foreground">
@@ -422,7 +425,7 @@ onMounted(loadConfig)
 
           <div class="space-y-1.5">
             <Label for="cua-key" class="flex items-center gap-1.5">
-              <KeyRound class="h-3.5 w-3.5" />
+              <KeyRound class="size-3.5" />
               {{ t('computerUse.settings.apiKey') }}
             </Label>
             <Input
diff --git a/web/src/components/HelpTooltip.vue b/web/src/components/HelpTooltip.vue
index e9a272b0..60d0ec18 100644
--- a/web/src/components/HelpTooltip.vue
+++ b/web/src/components/HelpTooltip.vue
@@ -25,9 +25,9 @@ defineProps<{
           variant="ghost"
           size="icon-xs"
           class="text-muted-foreground/60 hover:text-muted-foreground"
-          :class="iconSize === 'sm' ? 'h-3.5 w-3.5' : 'h-4 w-4'"
+          :class="iconSize === 'sm' ? 'size-3.5' : 'size-4'"
         >
-          <HelpCircle :class="iconSize === 'sm' ? 'h-3.5 w-3.5' : 'h-4 w-4'" />
+          <HelpCircle :class="iconSize === 'sm' ? 'size-3.5' : 'size-4'" />
         </Button>
       </TooltipTrigger>
       <TooltipContent
diff --git a/web/src/components/HidConfigPopover.vue b/web/src/components/HidConfigPopover.vue
index e8756f89..ec5924be 100644
--- a/web/src/components/HidConfigPopover.vue
+++ b/web/src/components/HidConfigPopover.vue
@@ -232,9 +232,9 @@ watch(() => props.open, (isOpen) => {
 <template>
   <Popover :open="open" @update:open="emit('update:open', $event)">
     <PopoverTrigger as-child>
-      <Button variant="ghost" size="sm" class="h-7 w-7 sm:h-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs">
-        <MousePointer v-if="mouseMode === 'absolute'" class="h-3.5 w-3.5 sm:h-4 sm:w-4" />
-        <Move v-else class="h-3.5 w-3.5 sm:h-4 sm:w-4" />
+      <Button variant="ghost" size="sm" class="size-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs">
+        <MousePointer v-if="mouseMode === 'absolute'" class="size-3.5 sm:size-4" />
+        <Move v-else class="size-3.5 sm:size-4" />
         <span class="hidden sm:inline">{{ buttonText }}</span>
       </Button>
     </PopoverTrigger>
@@ -261,7 +261,7 @@ watch(() => props.open, (isOpen) => {
                 class="flex-1 h-8 text-xs"
                 @click="toggleMouseMode"
               >
-                <MousePointer class="h-3.5 w-3.5 mr-1" />
+                <MousePointer class="size-3.5 mr-1" />
                 {{ t('actionbar.absolute') }}
               </Button>
               <Button
@@ -270,7 +270,7 @@ watch(() => props.open, (isOpen) => {
                 class="flex-1 h-8 text-xs"
                 @click="toggleMouseMode"
               >
-                <Move class="h-3.5 w-3.5 mr-1" />
+                <Move class="size-3.5 mr-1" />
                 {{ t('actionbar.relative') }}
               </Button>
             </div>
@@ -314,12 +314,11 @@ watch(() => props.open, (isOpen) => {
             <h5 class="text-xs font-medium text-muted-foreground">{{ t('actionbar.hidDeviceSettings') }}</h5>
             <Button
               variant="ghost"
-              size="icon"
-              class="h-6 w-6"
+              size="icon-xs"
               :disabled="loadingDevices"
               @click="loadDevices"
             >
-              <RefreshCw :class="['h-3.5 w-3.5', loadingDevices && 'animate-spin']" />
+              <RefreshCw :class="['size-3.5', loadingDevices && 'animate-spin']" />
             </Button>
           </div>
 
@@ -330,7 +329,7 @@ watch(() => props.open, (isOpen) => {
               :model-value="hidBackend"
               @update:model-value="handleBackendChange"
             >
-              <SelectTrigger class="h-8 w-full text-xs">
+              <SelectTrigger size="sm" class="w-full text-xs">
                 <SelectValue />
               </SelectTrigger>
               <SelectContent>
@@ -348,7 +347,7 @@ watch(() => props.open, (isOpen) => {
               :model-value="devicePath"
               @update:model-value="handleDevicePathChange"
               :disabled="availableDevicePaths.length === 0"
-              class="h-8 w-full text-xs"
+              size="sm" class="w-full text-xs"
             >
                 <NativeSelectOption value="">{{ t('actionbar.selectDevice') }}</NativeSelectOption>
                 <NativeSelectOption
@@ -369,7 +368,7 @@ watch(() => props.open, (isOpen) => {
               :model-value="String(baudrate)"
               @update:model-value="handleBaudrateChange"
             >
-              <SelectTrigger class="h-8 text-xs">
+              <SelectTrigger size="sm" class="text-xs">
                 <SelectValue />
               </SelectTrigger>
               <SelectContent>
@@ -388,7 +387,7 @@ watch(() => props.open, (isOpen) => {
             :disabled="applying"
             @click="applyHidConfig"
           >
-            <Loader2 v-if="applying" class="h-3.5 w-3.5 mr-1.5 animate-spin" />
+            <Loader2 v-if="applying" class="size-3.5 mr-1.5 animate-spin" />
             <span>{{ applying ? t('actionbar.applying') : t('common.apply') }}</span>
           </Button>
           </div>
diff --git a/web/src/components/InfoBar.vue b/web/src/components/InfoBar.vue
index aea5ffa7..295e9448 100644
--- a/web/src/components/InfoBar.vue
+++ b/web/src/components/InfoBar.vue
@@ -48,13 +48,13 @@ const keysDisplay = computed(() => {
       <div class="flex items-center justify-between text-xs px-2 py-0.5">
         <div v-if="keyboardLedEnabled" class="flex items-center gap-1">
           <Badge variant="outline" class="h-4 gap-1 px-1 text-[10px] text-foreground">
-            <span class="h-1.5 w-1.5 rounded-full" :class="capsLock ? 'bg-success' : 'bg-warning'" />C
+            <span class="size-1.5 rounded-full" :class="capsLock ? 'bg-success' : 'bg-warning'" />C
           </Badge>
           <Badge variant="outline" class="h-4 gap-1 px-1 text-[10px] text-foreground">
-            <span class="h-1.5 w-1.5 rounded-full" :class="numLock ? 'bg-success' : 'bg-warning'" />N
+            <span class="size-1.5 rounded-full" :class="numLock ? 'bg-success' : 'bg-warning'" />N
           </Badge>
           <Badge variant="outline" class="h-4 gap-1 px-1 text-[10px] text-foreground">
-            <span class="h-1.5 w-1.5 rounded-full" :class="scrollLock ? 'bg-success' : 'bg-warning'" />S
+            <span class="size-1.5 rounded-full" :class="scrollLock ? 'bg-success' : 'bg-warning'" />S
           </Badge>
         </div>
         <div v-else class="text-[10px] text-muted-foreground/60">
@@ -87,15 +87,15 @@ const keysDisplay = computed(() => {
           <Separator orientation="vertical" class="h-5" />
           <template v-if="keyboardLedEnabled">
             <Badge variant="outline" class="mx-1 gap-1.5 text-foreground">
-              <span class="h-1.5 w-1.5 rounded-full" :class="capsLock ? 'bg-success' : 'bg-warning'" />
+              <span class="size-1.5 rounded-full" :class="capsLock ? 'bg-success' : 'bg-warning'" />
               {{ t('infobar.caps') }}
             </Badge>
             <Badge variant="outline" class="mx-1 gap-1.5 text-foreground">
-              <span class="h-1.5 w-1.5 rounded-full" :class="numLock ? 'bg-success' : 'bg-warning'" />
+              <span class="size-1.5 rounded-full" :class="numLock ? 'bg-success' : 'bg-warning'" />
               {{ t('infobar.num') }}
             </Badge>
             <Badge variant="outline" class="mx-1 gap-1.5 text-foreground">
-              <span class="h-1.5 w-1.5 rounded-full" :class="scrollLock ? 'bg-success' : 'bg-warning'" />
+              <span class="size-1.5 rounded-full" :class="scrollLock ? 'bg-success' : 'bg-warning'" />
               {{ t('infobar.scroll') }}
             </Badge>
           </template>
diff --git a/web/src/components/LanguageToggleButton.vue b/web/src/components/LanguageToggleButton.vue
index 8204c00c..6badffad 100644
--- a/web/src/components/LanguageToggleButton.vue
+++ b/web/src/components/LanguageToggleButton.vue
@@ -43,7 +43,7 @@ function toggleLanguage() {
     :aria-label="t('common.toggleLanguage')"
     @click="toggleLanguage"
   >
-    <Languages class="h-4 w-4" />
+    <Languages class="size-4" />
     <span v-if="props.labelMode !== 'hidden'">{{ buttonLabel }}</span>
     <span class="sr-only">{{ t('common.toggleLanguage') }}</span>
   </Button>
diff --git a/web/src/components/MsdDialog.vue b/web/src/components/MsdDialog.vue
index b194011a..39006480 100644
--- a/web/src/components/MsdDialog.vue
+++ b/web/src/components/MsdDialog.vue
@@ -153,8 +153,8 @@ const downloadProgress = ref<{
 } | null>(null)
 
 const TWO_POINT_TWO_GB = 2.2 * 1024 * 1024 * 1024
-const tabTriggerClass = 'h-9 rounded-md border-0 bg-transparent text-center text-muted-foreground shadow-none hover:text-foreground data-[state=active]:border-0 data-[state=active]:bg-background data-[state=active]:text-foreground data-[state=active]:shadow-sm'
-const segmentedGroupClass = 'grid w-full grid-cols-2 items-center gap-1 rounded-md border border-border bg-muted p-1'
+const tabTriggerClass = 'h-8 rounded-md border-0 bg-transparent text-center text-muted-foreground shadow-none hover:text-foreground data-[state=active]:border-0 data-[state=active]:bg-background data-[state=active]:text-foreground data-[state=active]:shadow-sm'
+const segmentedGroupClass = 'grid w-full grid-cols-2 items-center gap-1 rounded-md border border-border bg-muted p-0.5'
 const segmentedItemClass = 'h-8 w-full justify-center rounded-md border-0 bg-transparent px-3 text-center text-xs text-muted-foreground shadow-none hover:bg-transparent hover:text-foreground data-[state=on]:border-0 data-[state=on]:bg-background data-[state=on]:text-foreground data-[state=on]:shadow-sm data-[state=on]:hover:bg-background'
 
 const diskMode = computed(() => systemStore.msd?.diskMode ?? 'single')
@@ -688,17 +688,17 @@ onUnmounted(() => {
   <TooltipProvider>
     <Dialog :open="open" @update:open="emit('update:open', $event)">
       <DialogContent class="max-h-[90vh] overflow-hidden p-0 sm:max-w-[760px] flex flex-col">
-      <DialogHeader class="px-6 pt-6 shrink-0">
+      <DialogHeader class="px-5 pt-4 shrink-0">
         <DialogTitle class="flex items-center gap-2">
-          <HardDrive class="h-5 w-5" />
+          <HardDrive class="size-5" />
           {{ t('msd.title') }}
         </DialogTitle>
         <DialogDescription as="div" class="mt-1 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between">
           <span class="flex min-w-0 flex-wrap items-center gap-x-2 gap-y-1">
             <span :class="msdConnected ? 'text-success' : 'text-muted-foreground'" class="flex items-center gap-1.5">
-              <span class="relative flex h-2 w-2">
+              <span class="relative flex size-2">
                 <span v-if="msdConnected" class="absolute inline-flex h-full w-full animate-ping rounded-full bg-success opacity-75"></span>
-                <span :class="msdConnected ? 'bg-success' : 'bg-muted-foreground'" class="relative inline-flex h-2 w-2 rounded-full"></span>
+                <span :class="msdConnected ? 'bg-success' : 'bg-muted-foreground'" class="relative inline-flex size-2 rounded-full"></span>
               </span>
               {{ msdConnected ? t('common.connected') : t('common.disconnected') }}
             </span>
@@ -720,8 +720,8 @@ onUnmounted(() => {
               <span class="font-medium text-foreground">{{ t('msd.diskMode') }}</span>
               <Tooltip>
                 <TooltipTrigger as-child>
-                  <span class="inline-flex h-4 w-4 items-center justify-center rounded-full text-muted-foreground hover:text-foreground">
-                    <Info class="h-3.5 w-3.5" />
+                  <span class="inline-flex size-4 items-center justify-center rounded-full text-muted-foreground hover:text-foreground">
+                    <Info class="size-3.5" />
                   </span>
                 </TooltipTrigger>
                 <TooltipContent>
@@ -747,15 +747,15 @@ onUnmounted(() => {
 
       <Separator class="shrink-0" />
 
-      <div class="flex-1 min-h-0 flex flex-col px-6 pb-6 pt-4">
+      <div class="flex-1 min-h-0 flex flex-col px-5 pb-4 pt-3">
         <Tabs v-model="activeTab" class="flex-1 flex flex-col min-h-0">
-          <TabsList class="grid h-auto w-full shrink-0 grid-cols-2 gap-1 rounded-md border border-border bg-muted p-1">
+          <TabsList class="grid h-auto w-full shrink-0 grid-cols-2 gap-1 rounded-md border border-border bg-muted p-0.5">
           <TabsTrigger value="images" :class="tabTriggerClass">
-            <Disc class="h-4 w-4 mr-1.5" />
+            <Disc class="size-4 mr-1.5" />
             {{ t('msd.images') }}
           </TabsTrigger>
           <TabsTrigger value="drive" :class="tabTriggerClass">
-            <HardDrive class="h-4 w-4 mr-1.5" />
+            <HardDrive class="size-4 mr-1.5" />
             {{ t('msd.drive') }}
           </TabsTrigger>
         </TabsList>
@@ -775,7 +775,7 @@ onUnmounted(() => {
                       @change="handleImageUpload"
                     />
                     <Button variant="outline" size="sm" as="span" class="h-8 cursor-pointer px-2.5 text-xs">
-                      <Upload class="mr-1.5 h-3.5 w-3.5" />
+                      <Upload class="mr-1.5 size-3.5" />
                       {{ t('msd.uploadImage') }}
                     </Button>
                   </label>
@@ -785,11 +785,11 @@ onUnmounted(() => {
                     class="h-8 px-2.5 text-xs"
                     @click="showUrlDialog = true"
                   >
-                    <Globe class="mr-1.5 h-3.5 w-3.5" />
+                    <Globe class="mr-1.5 size-3.5" />
                     {{ t('msd.downloadFromUrl') }}
                   </Button>
-                  <Button variant="ghost" size="icon" class="h-8 w-8" @click="loadImages">
-                    <RefreshCw class="h-3.5 w-3.5" :class="{ 'animate-spin': loadingImages }" />
+                  <Button variant="ghost" size="icon-sm" @click="loadImages">
+                    <RefreshCw class="size-3.5" :class="{ 'animate-spin': loadingImages }" />
                   </Button>
                 </div>
               </div>
@@ -817,8 +817,8 @@ onUnmounted(() => {
                   >
                     <div class="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between">
                       <div class="flex min-w-0 flex-1 items-start gap-2">
-                        <span v-if="mountedImage(image.id)" class="mt-1.5 h-2 w-2 shrink-0 rounded-full bg-primary" />
-                        <Disc v-else class="mt-0.5 h-4 w-4 shrink-0 text-muted-foreground" />
+                        <span v-if="mountedImage(image.id)" class="mt-1.5 size-2 shrink-0 rounded-full bg-primary" />
+                        <Disc v-else class="mt-0.5 size-4 shrink-0 text-muted-foreground" />
                         <div class="w-0 flex-1">
                           <Tooltip>
                             <TooltipTrigger as-child>
@@ -836,7 +836,7 @@ onUnmounted(() => {
                                   variant="outline"
                                   class="h-4 cursor-help border-warning/50 px-1.5 text-[10px] text-warning"
                                 >
-                                  <AlertCircle class="h-2.5 w-2.5 mr-0.5" />
+                                  <AlertCircle class="size-2.5 mr-0.5" />
                                   {{ t('msd.largeFileWarning') }}
                                 </Badge>
                               </TooltipTrigger>
@@ -856,7 +856,7 @@ onUnmounted(() => {
                             :disabled="operationInProgress"
                             @click="unmountImageById(image.id)"
                           >
-                            <Unlink class="h-3.5 w-3.5 mr-1" />
+                            <Unlink class="size-3.5 mr-1" />
                             {{ t('msd.disconnect') }}
                           </Button>
                         </template>
@@ -868,7 +868,7 @@ onUnmounted(() => {
                             :disabled="operationInProgress || mediaSlotsFull"
                             @click="connectImage(image)"
                           >
-                            <Link v-if="!connecting" class="h-3.5 w-3.5 mr-1" />
+                            <Link v-if="!connecting" class="size-3.5 mr-1" />
                             <span v-if="connecting">{{ t('common.connecting') }}...</span>
                             <span v-else>{{ t('msd.connect') }}</span>
                           </Button>
@@ -876,11 +876,11 @@ onUnmounted(() => {
                         <Button
                           variant="ghost"
                           size="icon"
-                          class="h-8 w-8 text-muted-foreground hover:bg-destructive/10 hover:text-destructive"
+                          class="size-8 text-muted-foreground hover:bg-destructive/10 hover:text-destructive"
                           :disabled="operationInProgress || !!mountedImage(image.id)"
                           @click="confirmDelete('image', image.id, image.name)"
                         >
-                          <Trash2 class="h-3.5 w-3.5" />
+                          <Trash2 class="size-3.5" />
                         </Button>
                       </div>
                     </div>
@@ -900,7 +900,7 @@ onUnmounted(() => {
           <TabsContent value="drive" class="m-0 flex min-h-0 flex-1 flex-col space-y-4 pt-3">
             <template v-if="!driveInitialized">
               <div class="shrink-0 text-center py-8 space-y-4">
-                <HardDrive class="h-10 w-10 mx-auto text-muted-foreground" />
+                <HardDrive class="size-10 mx-auto text-muted-foreground" />
                 <p class="text-sm text-muted-foreground">{{ t('msd.driveNotInitialized') }}</p>
                 <Button size="sm" @click="initializeDrive">
                   {{ t('msd.initializeDrive') }}
@@ -920,7 +920,7 @@ onUnmounted(() => {
               >
                 <div class="flex items-center justify-between">
                   <div class="flex items-center gap-2">
-                    <HardDrive class="h-4 w-4 text-muted-foreground" />
+                    <HardDrive class="size-4 text-muted-foreground" />
                     <span class="text-sm font-medium">{{ t('msd.drive') }}</span>
                     <!-- Show size badge only when info is available -->
                     <Badge v-if="driveInfo" variant="outline" class="text-xs">
@@ -933,8 +933,8 @@ onUnmounted(() => {
                       </Badge>
                       <Tooltip>
                         <TooltipTrigger as-child>
-                          <span class="inline-flex h-4 w-4 items-center justify-center text-muted-foreground hover:text-foreground">
-                            <Info class="h-3.5 w-3.5" />
+                          <span class="inline-flex size-4 items-center justify-center text-muted-foreground hover:text-foreground">
+                            <Info class="size-3.5" />
                           </span>
                         </TooltipTrigger>
                         <TooltipContent>
@@ -958,9 +958,9 @@ onUnmounted(() => {
                     </template>
                     <template v-else-if="driveConnectedToTarget">
                       <Badge variant="default" class="h-8 px-2 text-xs">
-                        <span class="relative flex h-1.5 w-1.5 mr-1.5">
+                        <span class="relative flex size-1.5 mr-1.5">
                           <span class="absolute inline-flex h-full w-full animate-ping rounded-full bg-primary-foreground opacity-75"></span>
-                          <span class="relative inline-flex h-1.5 w-1.5 rounded-full bg-primary-foreground"></span>
+                          <span class="relative inline-flex size-1.5 rounded-full bg-primary-foreground"></span>
                         </span>
                         {{ t('common.connected') }}
                       </Badge>
@@ -972,7 +972,7 @@ onUnmounted(() => {
                         :disabled="operationInProgress"
                         @click="unmountMedia(driveMedia)"
                       >
-                        <Unlink class="h-3.5 w-3.5 mr-1" />
+                        <Unlink class="size-3.5 mr-1" />
                         {{ t('msd.disconnect') }}
                       </Button>
                     </template>
@@ -984,7 +984,7 @@ onUnmounted(() => {
                         :disabled="operationInProgress || mediaSlotsFull || !!driveError"
                         @click="connectDrive"
                       >
-                        <Link v-if="!connecting" class="h-3.5 w-3.5 mr-1" />
+                        <Link v-if="!connecting" class="size-3.5 mr-1" />
                         <span v-if="connecting">{{ t('common.connecting') }}...</span>
                         <span v-else>{{ t('msd.connect') }}</span>
                       </Button>
@@ -992,11 +992,11 @@ onUnmounted(() => {
                     <Button
                       variant="ghost"
                       size="icon"
-                      class="h-8 w-8 text-muted-foreground hover:bg-destructive/10 hover:text-destructive"
+                      class="size-8 text-muted-foreground hover:bg-destructive/10 hover:text-destructive"
                       :disabled="operationInProgress || driveConnectedToTarget"
                       @click="showDeleteDriveDialog = true"
                     >
-                      <Trash2 class="h-3.5 w-3.5" />
+                      <Trash2 class="size-3.5" />
                     </Button>
                   </div>
                 </div>
@@ -1024,15 +1024,15 @@ onUnmounted(() => {
                       v-if="currentPath !== '/'"
                       variant="ghost"
                       size="icon"
-                      class="h-8 w-8 shrink-0"
+                      class="size-8 shrink-0"
                       :disabled="driveConnectedToTarget"
                       @click="navigateUp"
                     >
-                      <ArrowLeft class="h-3.5 w-3.5" />
+                      <ArrowLeft class="size-3.5" />
                     </Button>
                     <nav class="flex items-center text-xs min-w-0 overflow-hidden">
                       <template v-for="(crumb, index) in breadcrumbs" :key="crumb.path">
-                        <ChevronRight v-if="index > 0" class="h-3 w-3 text-muted-foreground mx-0.5 shrink-0" />
+                        <ChevronRight v-if="index > 0" class="size-3 text-muted-foreground mx-0.5 shrink-0" />
                         <Button
                           variant="link"
                           size="sm"
@@ -1059,10 +1059,10 @@ onUnmounted(() => {
                             variant="ghost"
                             size="icon"
                             as="span"
-                            class="h-8 w-8"
+                            class="size-8"
                             :class="driveConnectedToTarget ? 'cursor-not-allowed opacity-40' : 'cursor-pointer'"
                           >
-                            <Upload class="h-3.5 w-3.5" />
+                            <Upload class="size-3.5" />
                           </Button>
                         </label>
                       </TooltipTrigger>
@@ -1076,11 +1076,11 @@ onUnmounted(() => {
                         <Button
                           variant="ghost"
                           size="icon"
-                          class="h-8 w-8"
+                          class="size-8"
                           :disabled="driveConnectedToTarget"
                           @click="showNewFolderDialog = true"
                         >
-                          <FolderPlus class="h-3.5 w-3.5" />
+                          <FolderPlus class="size-3.5" />
                         </Button>
                       </TooltipTrigger>
                       <TooltipContent v-if="driveConnectedToTarget">
@@ -1090,11 +1090,11 @@ onUnmounted(() => {
                     <Button
                       variant="ghost"
                       size="icon"
-                      class="h-8 w-8"
+                      class="size-8"
                       :disabled="driveConnectedToTarget"
                       @click="loadDriveFiles"
                     >
-                      <RefreshCw class="h-3.5 w-3.5" :class="{ 'animate-spin': loadingDrive }" />
+                      <RefreshCw class="size-3.5" :class="{ 'animate-spin': loadingDrive }" />
                     </Button>
                   </div>
                 </div>
@@ -1129,8 +1129,8 @@ onUnmounted(() => {
                         class="flex items-center gap-2 cursor-pointer flex-1 min-w-0"
                         @click="file.is_dir && navigateTo(file.path)"
                       >
-                        <Folder v-if="file.is_dir" class="h-4 w-4 shrink-0 text-info" />
-                        <File v-else class="h-4 w-4 text-muted-foreground shrink-0" />
+                        <Folder v-if="file.is_dir" class="size-4 shrink-0 text-info" />
+                        <File v-else class="size-4 text-muted-foreground shrink-0" />
                         <div class="min-w-0">
                           <Tooltip>
                             <TooltipTrigger as-child>
@@ -1150,22 +1150,22 @@ onUnmounted(() => {
                           v-if="!file.is_dir"
                           variant="ghost"
                           size="icon"
-                          class="h-8 w-8"
+                          class="size-8"
                           as="a"
                           :href="msdApi.downloadDriveFile(file.path)"
                           download
                         >
-                          <Download class="h-3.5 w-3.5" />
+                          <Download class="size-3.5" />
                         </Button>
                         <!-- ③ Delete disabled when drive connected to target -->
                         <Button
                           variant="ghost"
                           size="icon"
-                          class="h-8 w-8 text-muted-foreground hover:bg-destructive/10 hover:text-destructive"
+                          class="size-8 text-muted-foreground hover:bg-destructive/10 hover:text-destructive"
                           :disabled="driveConnectedToTarget"
                           @click="confirmDelete('file', file.path, file.name)"
                         >
-                          <Trash2 class="h-3.5 w-3.5" />
+                          <Trash2 class="size-3.5" />
                         </Button>
                       </div>
                     </div>
@@ -1339,7 +1339,7 @@ onUnmounted(() => {
           {{ t('common.cancel') }}
         </Button>
         <Button @click="confirmImageMount" :disabled="connecting || mediaSlotsFull">
-          <Link v-if="!connecting" class="h-4 w-4 mr-1" />
+          <Link v-if="!connecting" class="size-4 mr-1" />
           <span v-if="connecting">{{ t('common.connecting') }}...</span>
           <span v-else>{{ t('msd.connect') }}</span>
         </Button>
@@ -1366,7 +1366,7 @@ onUnmounted(() => {
     <DialogContent>
       <DialogHeader>
         <DialogTitle class="flex items-center gap-2">
-          <Globe class="h-5 w-5" />
+          <Globe class="size-5" />
           {{ t('msd.downloadFromUrl') }}
         </DialogTitle>
         <DialogDescription>{{ t('msd.downloadFromUrlDesc') }}</DialogDescription>
@@ -1425,11 +1425,11 @@ onUnmounted(() => {
           :disabled="!downloadUrl.trim()"
           @click="startUrlDownload"
         >
-          <Download class="h-4 w-4 mr-1" />
+          <Download class="size-4 mr-1" />
           {{ t('msd.download') }}
         </Button>
         <Button v-else variant="destructive" @click="cancelUrlDownload">
-          <X class="h-4 w-4 mr-1" />
+          <X class="size-4 mr-1" />
           {{ t('common.cancel') }}
         </Button>
       </DialogFooter>
diff --git a/web/src/components/PasteModal.vue b/web/src/components/PasteModal.vue
index 2fc9ae45..2ed5f21b 100644
--- a/web/src/components/PasteModal.vue
+++ b/web/src/components/PasteModal.vue
@@ -205,7 +205,7 @@ function handleKeydown(e: KeyboardEvent) {
 
     <!-- Warning for untypable characters -->
     <Alert v-if="hasUntypableChars && !isPasting" variant="warning">
-      <AlertCircle class="h-4 w-4 shrink-0 mt-0.5" />
+      <AlertCircle class="size-4 shrink-0 mt-0.5" />
       <AlertTitle>{{ t('paste.untypableWarning') }}</AlertTitle>
       <AlertDescription>
           {{ t('paste.untypableChars', { chars: textAnalysis?.untypableChars.slice(0, 5).map(c => c === '\n' ? '\\n' : c === '\r' ? '\\r' : c === '\t' ? '\\t' : c).join(', ') }) }}
@@ -234,7 +234,7 @@ function handleKeydown(e: KeyboardEvent) {
           {{ t('common.cancel') }}
         </Button>
         <Button v-else variant="ghost" size="sm" @click="cancelPaste">
-          <Square class="h-3 w-3 mr-1.5 fill-current" />
+          <Square class="size-3 mr-1.5 fill-current" />
           {{ t('paste.stop') }}
         </Button>
         <Button
@@ -242,7 +242,7 @@ function handleKeydown(e: KeyboardEvent) {
           :disabled="!text.trim() || isPasting"
           @click="handlePaste"
         >
-          <CornerDownLeft class="h-4 w-4 mr-1.5" />
+          <CornerDownLeft class="size-4 mr-1.5" />
           {{ t('paste.confirm') }}
         </Button>
       </div>
diff --git a/web/src/components/StatusCard.vue b/web/src/components/StatusCard.vue
index 1d961532..73f97653 100644
--- a/web/src/components/StatusCard.vue
+++ b/web/src/components/StatusCard.vue
@@ -141,7 +141,7 @@ const statusBadgeText = computed(() => {
         <template v-if="compact">
           <!-- Compact: single row with dot + abbreviated title -->
           <div class="flex items-center gap-1">
-            <span :class="cn('h-1.5 w-1.5 rounded-full shrink-0', statusColor)" />
+            <span :class="cn('size-1.5 rounded-full shrink-0', statusColor)" />
             <span class="text-[10px] text-muted-foreground leading-tight truncate">{{ title }}</span>
           </div>
         </template>
@@ -150,7 +150,7 @@ const statusBadgeText = computed(() => {
           <span class="font-medium text-foreground text-xs truncate">{{ title }}</span>
           <!-- Bottom: Status dot + Quick info -->
           <div class="flex items-center gap-1.5">
-            <span :class="cn('h-2 w-2 rounded-full shrink-0', statusColor)" />
+            <span :class="cn('size-2 rounded-full shrink-0', statusColor)" />
             <span class="text-[11px] text-muted-foreground leading-tight truncate">
               {{ quickInfo || subtitle || statusText }}
             </span>
@@ -169,7 +169,7 @@ const statusBadgeText = computed(() => {
             status === 'error' ? 'bg-destructive/10 text-destructive' :
             'bg-muted text-muted-foreground'
           )">
-            <component :is="StatusIcon" class="h-5 w-5" />
+            <component :is="StatusIcon" class="size-5" />
           </div>
           <div class="flex-1 min-w-0">
             <h4 class="font-semibold text-sm">{{ title }}</h4>
@@ -178,7 +178,7 @@ const statusBadgeText = computed(() => {
                 v-if="statusIcon"
                 :is="statusIcon"
                 :class="cn(
-                  'h-3.5 w-3.5',
+                  'size-3.5',
                   status === 'connected' ? 'text-success' :
                   status === 'connecting' ? 'text-warning animate-spin' :
                   status === 'error' ? 'text-destructive' :
@@ -229,7 +229,7 @@ const statusBadgeText = computed(() => {
         <template v-if="compact">
           <!-- Compact: single row with dot + abbreviated title -->
           <div class="flex items-center gap-1">
-            <span :class="cn('h-1.5 w-1.5 rounded-full shrink-0', statusColor)" />
+            <span :class="cn('size-1.5 rounded-full shrink-0', statusColor)" />
             <span class="text-[10px] text-muted-foreground leading-tight truncate">{{ title }}</span>
           </div>
         </template>
@@ -238,7 +238,7 @@ const statusBadgeText = computed(() => {
           <span class="font-medium text-foreground text-xs truncate">{{ title }}</span>
           <!-- Bottom: Status dot + Quick info -->
           <div class="flex items-center gap-1.5">
-            <span :class="cn('h-2 w-2 rounded-full shrink-0', statusColor)" />
+            <span :class="cn('size-2 rounded-full shrink-0', statusColor)" />
             <span class="text-[11px] text-muted-foreground leading-tight truncate">
               {{ quickInfo || subtitle || statusText }}
             </span>
@@ -257,7 +257,7 @@ const statusBadgeText = computed(() => {
             status === 'error' ? 'bg-destructive/10 text-destructive' :
             'bg-muted text-muted-foreground'
           )">
-            <component :is="StatusIcon" class="h-5 w-5" />
+            <component :is="StatusIcon" class="size-5" />
           </div>
           <div class="flex-1 min-w-0">
             <h4 class="font-semibold text-sm">{{ title }}</h4>
@@ -266,7 +266,7 @@ const statusBadgeText = computed(() => {
                 v-if="statusIcon"
                 :is="statusIcon"
                 :class="cn(
-                  'h-3.5 w-3.5',
+                  'size-3.5',
                   status === 'connected' ? 'text-success' :
                   status === 'connecting' ? 'text-warning animate-spin' :
                   status === 'error' ? 'text-destructive' :
diff --git a/web/src/components/TerminalDialog.vue b/web/src/components/TerminalDialog.vue
index c74749b9..d145aab4 100644
--- a/web/src/components/TerminalDialog.vue
+++ b/web/src/components/TerminalDialog.vue
@@ -70,23 +70,22 @@ function hideFrameScrollbars(event: Event) {
       <DialogHeader class="px-3 sm:px-4 py-1 border-b shrink-0">
         <DialogTitle class="flex h-8 items-center justify-between w-full">
           <div class="flex items-center gap-2 min-w-0">
-            <Terminal class="h-4 w-4 shrink-0" />
+            <Terminal class="size-4 shrink-0" />
             <span class="truncate text-sm font-semibold">{{ t('extensions.ttyd.title') }}</span>
           </div>
           <div class="flex items-center gap-1 shrink-0">
             <Button
               variant="ghost"
-              size="icon"
-              class="h-7 w-7"
+              size="icon-sm"
               @click="openTerminalInNewTab"
               :aria-label="t('extensions.ttyd.openInNewTab')"
               :title="t('extensions.ttyd.openInNewTab')"
             >
-              <ExternalLink class="h-3.5 w-3.5" />
+              <ExternalLink class="size-3.5" />
             </Button>
             <DialogClose as-child>
-              <Button variant="ghost" size="icon" class="h-7 w-7">
-                <X class="h-3.5 w-3.5" />
+              <Button variant="ghost" size="icon-sm">
+                <X class="size-3.5" />
                 <span class="sr-only">Close</span>
               </Button>
             </DialogClose>
diff --git a/web/src/components/TotpSettingsCard.vue b/web/src/components/TotpSettingsCard.vue
index 9558eadf..d52ebe81 100644
--- a/web/src/components/TotpSettingsCard.vue
+++ b/web/src/components/TotpSettingsCard.vue
@@ -249,11 +249,11 @@ onUnmounted(() => {
     </CardContent>
     <CardFooter class="border-t pt-4 justify-end">
       <Button v-if="!enabled" :disabled="statusLoading" @click="enrollmentOpen = true">
-        <ShieldCheck class="h-4 w-4" />
+        <ShieldCheck class="size-4" />
         {{ t('settings.totp.enable') }}
       </Button>
       <Button v-else variant="destructive" :disabled="statusLoading" @click="disableOpen = true">
-        <ShieldOff class="h-4 w-4" />
+        <ShieldOff class="size-4" />
         {{ t('settings.totp.disable') }}
       </Button>
     </CardFooter>
@@ -283,7 +283,7 @@ onUnmounted(() => {
         <div class="space-y-2">
           <Label for="totp-enrollment-code">{{ t('auth.totpCode') }}</Label>
           <div class="relative">
-            <KeyRound class="absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
+            <KeyRound class="absolute left-3 top-1/2 size-4 -translate-y-1/2 text-muted-foreground" />
             <Input id="totp-enrollment-code" v-model="enrollmentCode" inputmode="numeric" autocomplete="one-time-code" maxlength="6" class="pl-10 font-mono" @input="enrollmentCode = normalizeCode(enrollmentCode)" />
           </div>
         </div>
@@ -296,11 +296,11 @@ onUnmounted(() => {
       <DialogFooter>
         <Button variant="outline" :disabled="enrollmentLoading" @click="enrollmentOpen = false">{{ t('common.cancel') }}</Button>
         <Button v-if="enrollmentStep === 'password'" :disabled="enrollmentLoading" @click="beginEnrollment">
-          <Loader2 v-if="enrollmentLoading" class="h-4 w-4 animate-spin" />
+          <Loader2 v-if="enrollmentLoading" class="size-4 animate-spin" />
           {{ t('common.next') }}
         </Button>
         <Button v-else :disabled="enrollmentLoading" @click="confirmEnrollment">
-          <Loader2 v-if="enrollmentLoading" class="h-4 w-4 animate-spin" />
+          <Loader2 v-if="enrollmentLoading" class="size-4 animate-spin" />
           {{ t('common.confirm') }}
         </Button>
       </DialogFooter>
@@ -329,7 +329,7 @@ onUnmounted(() => {
       <DialogFooter>
         <Button variant="outline" :disabled="disableLoading" @click="disableOpen = false">{{ t('common.cancel') }}</Button>
         <Button variant="destructive" :disabled="disableLoading" @click="disableTotp">
-          <Loader2 v-if="disableLoading" class="h-4 w-4 animate-spin" />
+          <Loader2 v-if="disableLoading" class="size-4 animate-spin" />
           {{ t('settings.totp.disable') }}
         </Button>
       </DialogFooter>
diff --git a/web/src/components/VideoConfigPopover.vue b/web/src/components/VideoConfigPopover.vue
index 445545e3..610f8254 100644
--- a/web/src/components/VideoConfigPopover.vue
+++ b/web/src/components/VideoConfigPopover.vue
@@ -594,8 +594,8 @@ watch(
 <template>
   <Popover :open="open" @update:open="emit('update:open', $event)">
     <PopoverTrigger as-child>
-      <Button variant="ghost" size="sm" class="h-7 w-7 sm:h-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs">
-        <Monitor class="h-3.5 w-3.5 sm:h-4 sm:w-4" />
+      <Button variant="ghost" size="sm" class="size-8 sm:w-auto p-0 sm:px-2 sm:gap-1.5 text-xs">
+        <Monitor class="size-3.5 sm:size-4" />
         <span class="hidden sm:inline">{{ buttonText }}</span>
       </Button>
     </PopoverTrigger>
@@ -612,7 +612,7 @@ watch(
           <!-- Mode Selection -->
           <div class="space-y-2">
             <div class="flex items-center gap-1">
-              <Label class="text-xs">{{ t('actionbar.videoMode') }}</Label>
+              <Label class="text-xs text-muted-foreground">{{ t('actionbar.videoMode') }}</Label>
               <HelpTooltip :content="t('actionbar.videoModeHint')" icon-size="sm" side="right" />
             </div>
             <Select
@@ -620,7 +620,7 @@ watch(
               @update:model-value="handleVideoModeChange"
               :disabled="loadingCodecs || availableCodecs.length === 0 || isRtspCodecLocked"
             >
-              <SelectTrigger class="h-8 w-full text-xs">
+              <SelectTrigger size="sm" class="w-full text-xs">
                 <div v-if="selectedCodecInfo" class="flex items-center gap-1.5 truncate">
                   <span class="truncate">{{ selectedCodecInfo.name }}</span>
                   <span
@@ -673,7 +673,7 @@ watch(
           <!-- Bitrate Preset - Only shown for WebRTC modes -->
           <div v-if="props.videoMode !== 'mjpeg'" class="space-y-2">
             <div class="flex items-center gap-1">
-              <Label class="text-xs">{{ t('actionbar.bitratePreset') }}</Label>
+              <Label class="text-xs text-muted-foreground">{{ t('actionbar.bitratePreset') }}</Label>
               <HelpTooltip :content="t('help.videoBitratePreset')" icon-size="sm" />
             </div>
             <div class="grid grid-cols-3 gap-1.5">
@@ -687,7 +687,7 @@ watch(
                 :disabled="applyingBitrate"
                 @click="handleBitratePresetChange('Speed')"
               >
-                <Zap class="h-3.5 w-3.5" />
+                <Zap class="size-3.5" />
                 <span class="text-[10px] font-medium">{{ t('actionbar.bitrateSpeed') }}</span>
               </Button>
               <Button
@@ -700,7 +700,7 @@ watch(
                 :disabled="applyingBitrate"
                 @click="handleBitratePresetChange('Balanced')"
               >
-                <Scale class="h-3.5 w-3.5" />
+                <Scale class="size-3.5" />
                 <span class="text-[10px] font-medium">{{ t('actionbar.bitrateBalanced') }}</span>
               </Button>
               <Button
@@ -713,7 +713,7 @@ watch(
                 :disabled="applyingBitrate"
                 @click="handleBitratePresetChange('Quality')"
               >
-                <Image class="h-3.5 w-3.5" />
+                <Image class="size-3.5" />
                 <span class="text-[10px] font-medium">{{ t('actionbar.bitrateQuality') }}</span>
               </Button>
             </div>
@@ -733,23 +733,22 @@ watch(
             <h5 class="text-xs font-medium text-muted-foreground">{{ t('actionbar.deviceSettings') }}</h5>
             <Button
               variant="ghost"
-              size="icon"
-              class="h-6 w-6"
+              size="icon-xs"
               :disabled="loadingDevices"
               @click="loadDevices"
             >
-              <RefreshCw :class="['h-3.5 w-3.5', loadingDevices && 'animate-spin']" />
+              <RefreshCw :class="['size-3.5', loadingDevices && 'animate-spin']" />
             </Button>
           </div>
 
           <!-- Device Selection -->
           <div class="space-y-2">
-            <Label class="text-xs">{{ t('actionbar.videoDevice') }}</Label>
+            <Label class="text-xs text-muted-foreground">{{ t('actionbar.videoDevice') }}</Label>
             <NativeSelect
               :model-value="selectedDevice"
               @update:model-value="handleDeviceChange"
               :disabled="loadingDevices || devices.length === 0"
-              class="h-8 w-full text-xs"
+              size="sm" class="w-full text-xs"
             >
                 <NativeSelectOption value="">{{ loadingDevices ? t('common.loading') : t('actionbar.selectDevice') }}</NativeSelectOption>
                 <NativeSelectOption
@@ -765,13 +764,13 @@ watch(
 
           <!-- Format Selection -->
           <div class="space-y-2">
-            <Label class="text-xs">{{ t('actionbar.videoFormat') }}</Label>
+            <Label class="text-xs text-muted-foreground">{{ t('actionbar.videoFormat') }}</Label>
             <Select
               :model-value="selectedFormat"
               @update:model-value="handleFormatChange"
               :disabled="!selectedDevice || availableFormats.length === 0"
             >
-              <SelectTrigger class="h-8 w-full text-xs">
+              <SelectTrigger size="sm" class="w-full text-xs">
                 <div v-if="selectedFormatInfo" class="flex min-w-0 items-center gap-1.5">
                   <span class="truncate">{{ selectedFormatInfo.description }}</span>
                   <span
@@ -825,12 +824,12 @@ watch(
 
           <!-- Resolution Selection -->
           <div class="space-y-2">
-            <Label class="text-xs">{{ t('actionbar.videoResolution') }}</Label>
+            <Label class="text-xs text-muted-foreground">{{ t('actionbar.videoResolution') }}</Label>
             <NativeSelect
               :model-value="selectedResolution"
               @update:model-value="handleResolutionChange"
               :disabled="!selectedFormat || availableResolutions.length === 0"
-              class="h-8 w-full text-xs"
+              size="sm" class="w-full text-xs"
             >
                 <NativeSelectOption value="">{{ t('actionbar.selectResolution') }}</NativeSelectOption>
                 <NativeSelectOption
@@ -846,12 +845,12 @@ watch(
 
           <!-- FPS Selection -->
           <div class="space-y-2">
-            <Label class="text-xs">{{ t('actionbar.videoFps') }}</Label>
+            <Label class="text-xs text-muted-foreground">{{ t('actionbar.videoFps') }}</Label>
             <NativeSelect
               :model-value="String(selectedFps)"
               @update:model-value="handleFpsChange"
               :disabled="!selectedResolution || availableFps.length === 0"
-              class="h-8 w-full text-xs"
+              size="sm" class="w-full text-xs"
             >
                 <NativeSelectOption value="">{{ t('actionbar.selectFps') }}</NativeSelectOption>
                 <NativeSelectOption
@@ -871,7 +870,7 @@ watch(
             :disabled="applying || !selectedDevice || !selectedFormat"
             @click="applyVideoConfig"
           >
-            <Loader2 v-if="applying" class="h-3.5 w-3.5 mr-1.5 animate-spin" />
+            <Loader2 v-if="applying" class="size-3.5 mr-1.5 animate-spin" />
             <span>{{ applying ? t('actionbar.applying') : t('common.apply') }}</span>
           </Button>
           </div>
diff --git a/web/src/components/ui/input/Input.vue b/web/src/components/ui/input/Input.vue
index 9db9e85f..6467aa39 100644
--- a/web/src/components/ui/input/Input.vue
+++ b/web/src/components/ui/input/Input.vue
@@ -3,11 +3,15 @@ import type { HTMLAttributes } from "vue"
 import { useVModel } from "@vueuse/core"
 import { cn } from "@/lib/utils"
 
-const props = defineProps<{
-  defaultValue?: string | number
-  modelValue?: string | number
-  class?: HTMLAttributes["class"]
-}>()
+const props = withDefaults(
+  defineProps<{
+    defaultValue?: string | number
+    modelValue?: string | number
+    class?: HTMLAttributes["class"]
+    size?: "sm" | "default"
+  }>(),
+  { size: "default" },
+)
 
 const emits = defineEmits<{
   (e: "update:modelValue", payload: string | number): void
@@ -23,8 +27,9 @@ const modelValue = useVModel(props, "modelValue", emits, {
   <input
     v-model="modelValue"
     data-slot="input"
+    :data-size="size"
     :class="cn(
-      'file:text-foreground placeholder:text-muted-foreground selection:bg-primary selection:text-primary-foreground dark:bg-input/30 border-input h-9 w-full min-w-0 rounded-md border bg-transparent px-3 py-1 text-base shadow-xs transition-[color,box-shadow] outline-none file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-sm file:font-medium disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 md:text-sm',
+      'file:text-foreground placeholder:text-muted-foreground selection:bg-primary selection:text-primary-foreground dark:bg-input/30 border-input data-[size=default]:h-9 data-[size=sm]:h-8 w-full min-w-0 rounded-md border bg-transparent px-3 py-1 text-base shadow-xs transition-[color,box-shadow] outline-none file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-sm file:font-medium disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 md:text-sm',
       'focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-3',
       'aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive',
       props.class,
diff --git a/web/src/components/ui/native-select/NativeSelect.vue b/web/src/components/ui/native-select/NativeSelect.vue
index 3d18dc59..7e0fdb9d 100644
--- a/web/src/components/ui/native-select/NativeSelect.vue
+++ b/web/src/components/ui/native-select/NativeSelect.vue
@@ -9,7 +9,10 @@ defineOptions({
   inheritAttrs: false,
 })
 
-const props = defineProps<{ modelValue?: AcceptableValue | AcceptableValue[], class?: HTMLAttributes["class"] }>()
+const props = withDefaults(
+  defineProps<{ modelValue?: AcceptableValue | AcceptableValue[], class?: HTMLAttributes["class"], size?: "sm" | "default" }>(),
+  { size: "default" },
+)
 
 const emit = defineEmits<{
   "update:modelValue": [value: AcceptableValue]
@@ -20,7 +23,7 @@ const modelValue = useVModel(props, "modelValue", emit, {
   defaultValue: "",
 })
 
-const delegatedProps = reactiveOmit(props, "class")
+const delegatedProps = reactiveOmit(props, "class", "size")
 </script>
 
 <template>
@@ -32,8 +35,9 @@ const delegatedProps = reactiveOmit(props, "class")
       v-bind="{ ...$attrs, ...delegatedProps }"
       v-model="modelValue"
       data-slot="native-select"
+      :data-size="size"
       :class="cn(
-        'border-input placeholder:text-muted-foreground selection:bg-primary selection:text-primary-foreground dark:bg-input/30 dark:hover:bg-input/50 h-9 w-full min-w-0 appearance-none rounded-md border bg-transparent px-3 py-2 pr-9 text-sm shadow-xs transition-[color,box-shadow] outline-none disabled:pointer-events-none disabled:cursor-not-allowed',
+        'border-input placeholder:text-muted-foreground selection:bg-primary selection:text-primary-foreground dark:bg-input/30 dark:hover:bg-input/50 data-[size=default]:h-9 data-[size=sm]:h-8 w-full min-w-0 appearance-none rounded-md border bg-transparent px-3 py-2 pr-9 text-sm shadow-xs transition-[color,box-shadow] outline-none disabled:pointer-events-none disabled:cursor-not-allowed',
         'focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-3',
         'aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive',
         props.class,
diff --git a/web/src/components/ui/sidebar/SidebarTrigger.vue b/web/src/components/ui/sidebar/SidebarTrigger.vue
index d934ccab..ba63f68c 100644
--- a/web/src/components/ui/sidebar/SidebarTrigger.vue
+++ b/web/src/components/ui/sidebar/SidebarTrigger.vue
@@ -18,7 +18,7 @@ const { toggleSidebar } = useSidebar()
     data-slot="sidebar-trigger"
     variant="ghost"
     size="icon"
-    :class="cn('h-7 w-7', props.class)"
+    :class="cn('size-7', props.class)"
     @click="toggleSidebar"
   >
     <PanelLeft />
diff --git a/web/src/components/ui/sidebar/utils.ts b/web/src/components/ui/sidebar/utils.ts
index 6e57eeb9..6880c7a1 100644
--- a/web/src/components/ui/sidebar/utils.ts
+++ b/web/src/components/ui/sidebar/utils.ts
@@ -3,7 +3,7 @@ import { createContext } from "reka-ui"
 
 export const SIDEBAR_COOKIE_NAME = "sidebar_state"
 export const SIDEBAR_COOKIE_MAX_AGE = 60 * 60 * 24 * 7
-export const SIDEBAR_WIDTH = "16rem"
+export const SIDEBAR_WIDTH = "14rem"
 export const SIDEBAR_WIDTH_MOBILE = "18rem"
 export const SIDEBAR_WIDTH_ICON = "3rem"
 export const SIDEBAR_KEYBOARD_SHORTCUT = "b"
diff --git a/web/src/style.css b/web/src/style.css
index cafdb2da..4a86eaa2 100644
--- a/web/src/style.css
+++ b/web/src/style.css
@@ -155,3 +155,30 @@ body {
 #app {
   min-height: 100vh;
 }
+
+@layer components {
+  /* Shared dotted backdrop: console video area, login & setup pages */
+  .dot-grid-bg {
+    background-color: var(--muted);
+    background-image: radial-gradient(circle, color-mix(in oklab, var(--muted-foreground) 35%, transparent) 1px, transparent 1px);
+    background-size: 20px 20px;
+  }
+}
+
+/* Settings page density: compact cards.
+   Unlayered on purpose — must outrank Tailwind's @layer utilities (py-6/px-6/gap-6). */
+.settings-dense [data-slot="card"] {
+  gap: 1rem;
+  padding-block: 1rem;
+}
+.settings-dense [data-slot="card-header"],
+.settings-dense [data-slot="card-content"],
+.settings-dense [data-slot="card-footer"] {
+  padding-inline: 1rem;
+}
+.settings-dense [data-slot="card-header"].border-b {
+  padding-bottom: 1rem;
+}
+.settings-dense [data-slot="card-footer"].border-t {
+  padding-top: 1rem;
+}
diff --git a/web/src/views/ConsoleView.vue b/web/src/views/ConsoleView.vue
index fc351fcd..56495f1b 100644
--- a/web/src/views/ConsoleView.vue
+++ b/web/src/views/ConsoleView.vue
@@ -3117,22 +3117,22 @@ onUnmounted(() => {
               />
             </div>
             <div class="mx-1 hidden h-6 w-px bg-border md:block" />
-            <Button variant="ghost" size="icon" class="h-8 w-8 hidden md:flex" :aria-label="t('common.toggleTheme')" @click="toggleTheme">
-              <Sun v-if="isDark" class="h-4 w-4" />
-              <Moon v-else class="h-4 w-4" />
+            <Button variant="ghost" size="icon-sm" class="hidden md:flex" :aria-label="t('common.toggleTheme')" @click="toggleTheme">
+              <Sun v-if="isDark" class="size-4" />
+              <Moon v-else class="size-4" />
             </Button>
-            <LanguageToggleButton class="h-8 w-8 hidden md:flex" />
+            <LanguageToggleButton class="size-8 hidden md:flex" />
             <DropdownMenu>
               <DropdownMenuTrigger as-child>
-                <Button variant="outline" size="sm" class="gap-1 sm:gap-1.5 h-7 sm:h-9 px-2 sm:px-3">
+                <Button variant="outline" size="sm" class="gap-1 sm:gap-1.5 px-2 sm:px-3">
                   <span class="text-xs max-w-[60px] sm:max-w-[100px] truncate">{{ authStore.user || 'admin' }}</span>
-                  <ChevronDown class="h-3 w-3 sm:h-3.5 sm:w-3.5" />
+                  <ChevronDown class="size-3 sm:size-3.5" />
                 </Button>
               </DropdownMenuTrigger>
               <DropdownMenuContent align="end">
                 <DropdownMenuItem class="md:hidden" @click="toggleTheme">
-                  <Sun v-if="isDark" class="h-4 w-4 mr-2" />
-                  <Moon v-else class="h-4 w-4 mr-2" />
+                  <Sun v-if="isDark" class="size-4 mr-2" />
+                  <Moon v-else class="size-4 mr-2" />
                   {{ isDark ? t('settings.lightMode') : t('settings.darkMode') }}
                 </DropdownMenuItem>
                 <DropdownMenuItem as-child class="md:hidden p-0">
@@ -3145,12 +3145,12 @@ onUnmounted(() => {
                 </DropdownMenuItem>
                 <DropdownMenuSeparator class="md:hidden" />
                 <DropdownMenuItem @click="changePasswordDialogOpen = true">
-                  <KeyRound class="h-4 w-4 mr-2" />
+                  <KeyRound class="size-4 mr-2" />
                   {{ t('auth.changePassword') }}
                 </DropdownMenuItem>
                 <DropdownMenuSeparator />
                 <DropdownMenuItem @click="logout">
-                  <LogOut class="h-4 w-4 mr-2" />
+                  <LogOut class="size-4 mr-2" />
                   {{ t('auth.logout') }}
                 </DropdownMenuItem>
               </DropdownMenuContent>
@@ -3179,13 +3179,7 @@ onUnmounted(() => {
       @open-computer-use="openComputerUse"
     />
     <div class="flex-1 overflow-hidden relative">
-      <div
-        class="absolute inset-0 bg-slate-100/80 dark:bg-slate-800/40 opacity-80"
-        style="
-          background-image: radial-gradient(circle, rgb(148 163 184 / 0.4) 1px, transparent 1px);
-          background-size: 20px 20px;
-        "
-      />
+      <div class="absolute inset-0 dot-grid-bg" />
       <div class="relative flex h-full w-full min-w-0 items-stretch gap-3 p-1 sm:p-4">
         <div
           class="flex min-w-0 flex-1 items-center justify-center transition-all duration-300"
@@ -3293,7 +3287,7 @@ onUnmounted(() => {
                 <div class="absolute w-full h-0.5 bg-gradient-to-r from-transparent via-primary/40 to-transparent animate-pulse" style="top: 50%; animation-duration: 1.5s;" />
               </div>
 
-              <Spinner class="h-10 w-10 sm:h-16 sm:w-16 text-white mb-2 sm:mb-4" />
+              <Spinner class="size-10 sm:size-16 text-white mb-2 sm:mb-4" />
               <p class="text-white/90 text-sm sm:text-lg font-medium text-center px-4 flex items-baseline justify-center gap-2 flex-wrap">
                 <span>{{ webrtcLoadingMessage }}</span>
                 <span
@@ -3339,7 +3333,7 @@ onUnmounted(() => {
               }"
             >
               <MonitorOff
-                class="h-10 w-10 sm:h-16 sm:w-16"
+                class="size-10 sm:size-16"
                 :class="{
                   'text-slate-200': signalOverlayInfo.tone === 'info',
                   'text-red-300': signalOverlayInfo.tone === 'error',
@@ -3368,7 +3362,7 @@ onUnmounted(() => {
               v-if="videoError && !videoLoading"
               class="absolute inset-0 flex flex-col items-center justify-center bg-black/85 text-white gap-4 transition-opacity duration-300 p-4"
             >
-              <MonitorOff class="h-10 w-10 sm:h-16 sm:w-16 text-slate-400" />
+              <MonitorOff class="size-10 sm:size-16 text-slate-400" />
               <div class="text-center max-w-md px-2">
                 <p class="font-medium text-sm sm:text-lg mb-1 sm:mb-2">{{ t('console.connectionFailed') }}</p>
                 <p class="text-xs sm:text-sm text-slate-300 mb-2 sm:mb-3">{{ t('console.connectionFailedDesc') }}</p>
@@ -3379,7 +3373,7 @@ onUnmounted(() => {
               </div>
               <div class="flex gap-2">
                 <Button variant="secondary" size="sm" @click="reloadPage">
-                  <RefreshCw class="h-4 w-4 mr-2" />
+                  <RefreshCw class="size-4 mr-2" />
                   {{ t('console.reconnect') }}
                 </Button>
               </div>
@@ -3470,7 +3464,7 @@ onUnmounted(() => {
             {{ t('common.cancel') }}
           </Button>
           <Button @click="handleChangePassword" :disabled="changingPassword">
-            <Loader2 v-if="changingPassword" class="h-4 w-4 mr-2 animate-spin" />
+            <Loader2 v-if="changingPassword" class="size-4 mr-2 animate-spin" />
             {{ t('common.confirm') }}
           </Button>
         </DialogFooter>
diff --git a/web/src/views/LoginView.vue b/web/src/views/LoginView.vue
index cdbeed30..4ba82ca5 100644
--- a/web/src/views/LoginView.vue
+++ b/web/src/views/LoginView.vue
@@ -120,27 +120,27 @@ function returnToPassword(keepError = false) {
 </script>
 
 <template>
-  <div class="min-h-screen min-h-dvh flex items-center justify-center bg-background p-4">
+  <div class="min-h-screen min-h-dvh flex items-center justify-center dot-grid-bg p-4">
     <Card class="relative w-full max-w-sm">
       <div class="absolute top-4 right-4">
         <LanguageToggleButton />
       </div>
 
-      <CardHeader class="space-y-2 pt-10 text-center sm:pt-12">
+      <CardHeader class="space-y-2 pt-8 text-center">
         <div class="mx-auto flex justify-center">
-          <BrandMark size="xl" />
+          <BrandMark size="lg" />
         </div>
-        <CardTitle class="text-xl sm:text-2xl">One-KVM</CardTitle>
+        <CardTitle class="text-xl">One-KVM</CardTitle>
         <CardDescription>{{ step === 'password' ? t('auth.login') : t('auth.totpPrompt') }}</CardDescription>
       </CardHeader>
 
       <CardContent>
         <form v-if="step === 'password'" @submit.prevent="handleLogin">
-          <FieldGroup>
+          <FieldGroup class="gap-5">
           <Field>
             <FieldLabel for="username">{{ t('auth.username') }}</FieldLabel>
             <div class="relative">
-              <User class="absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
+              <User class="absolute left-3 top-1/2 size-4 -translate-y-1/2 text-muted-foreground" />
               <Input
                 id="username"
                 v-model="username"
@@ -164,7 +164,7 @@ function returnToPassword(keepError = false) {
                     class="h-auto gap-1 p-0 text-xs text-muted-foreground"
                   >
                     {{ t('auth.forgotPassword') }}
-                    <CircleHelp class="h-3.5 w-3.5" />
+                    <CircleHelp class="size-3.5" />
                   </Button>
                 </PopoverTrigger>
                 <PopoverContent class="w-80 p-3" align="end">
@@ -175,7 +175,7 @@ function returnToPassword(keepError = false) {
               </Popover>
             </div>
             <div class="relative">
-              <Lock class="absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
+              <Lock class="absolute left-3 top-1/2 size-4 -translate-y-1/2 text-muted-foreground" />
               <Input
                 id="password"
                 v-model="password"
@@ -211,11 +211,11 @@ function returnToPassword(keepError = false) {
           </FieldGroup>
         </form>
         <form v-else @submit.prevent="handleTotpLogin">
-          <FieldGroup>
+          <FieldGroup class="gap-5">
             <Field>
               <FieldLabel for="totp-code">{{ t('auth.totpCode') }}</FieldLabel>
               <div class="relative">
-                <KeyRound class="absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
+                <KeyRound class="absolute left-3 top-1/2 size-4 -translate-y-1/2 text-muted-foreground" />
                 <Input
                   id="totp-code"
                   v-model="totpCode"
@@ -240,7 +240,7 @@ function returnToPassword(keepError = false) {
               <span v-else>{{ t('auth.verifyAndLogin') }}</span>
             </Button>
             <Button type="button" variant="ghost" class="w-full" :disabled="loading" @click="returnToPassword()">
-              <ArrowLeft class="h-4 w-4" />
+              <ArrowLeft class="size-4" />
               {{ t('auth.backToPassword') }}
             </Button>
           </FieldGroup>
diff --git a/web/src/views/SettingsView.vue b/web/src/views/SettingsView.vue
index 3d3b2a00..45ec49f0 100644
--- a/web/src/views/SettingsView.vue
+++ b/web/src/views/SettingsView.vue
@@ -2700,19 +2700,19 @@ watch(isWindows, () => {
   <AppLayout>
     <SidebarProvider class="h-full min-h-0 overflow-hidden">
       <Sidebar class="top-10 h-[calc(100dvh-2.5rem)] sm:top-14 sm:h-[calc(100dvh-3.5rem)]" collapsible="offcanvas">
-        <SidebarHeader class="gap-1 px-6 pt-6 pb-3 text-foreground md:pt-10">
+        <SidebarHeader class="gap-1 px-6 pt-4 pb-2 text-foreground md:pt-6">
           <h1 class="text-xl font-semibold">{{ t('settings.title') }}</h1>
           <p class="text-xs text-muted-foreground">{{ t('settings.sidebarSubtitle') }}</p>
         </SidebarHeader>
         <SidebarContent class="px-3 pb-6 md:pb-10">
-          <SidebarGroup v-for="group in navGroups" :key="group.title" class="px-0 py-2">
+          <SidebarGroup v-for="group in navGroups" :key="group.title" class="px-0 py-1">
             <SidebarGroupLabel class="uppercase">{{ group.title }}</SidebarGroupLabel>
             <SidebarMenu>
               <SidebarMenuItem v-for="item in group.items" :key="item.id">
                 <SidebarMenuButton
                   :is-active="activeSection === item.id"
                   :tooltip="item.label"
-                  class="h-10 px-3 text-foreground data-[active=true]:bg-primary data-[active=true]:text-primary-foreground data-[active=true]:shadow-sm data-[active=true]:hover:bg-primary data-[active=true]:hover:text-primary-foreground"
+                  class="h-8 px-3 text-foreground data-[active=true]:bg-primary data-[active=true]:text-primary-foreground data-[active=true]:shadow-sm data-[active=true]:hover:bg-primary data-[active=true]:hover:text-primary-foreground"
                   @click="selectSection(item.id)"
                 >
                   <component :is="item.icon" />
@@ -2727,19 +2727,19 @@ watch(isWindows, () => {
       <SidebarInset class="min-w-0 overflow-y-auto">
       <!-- Mobile Header -->
       <div class="md:hidden sticky top-0 z-20 flex items-center px-3 sm:px-4 py-2 sm:py-3 border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/70">
-        <SidebarTrigger class="mr-1.5 h-8 w-8 sm:mr-2 sm:h-9 sm:w-9" />
+        <SidebarTrigger class="mr-1.5 size-8 sm:mr-2 sm:size-9" />
         <div class="flex items-center gap-2 min-w-0">
-          <component :is="sectionMeta.icon" class="h-4 w-4 text-muted-foreground shrink-0" />
+          <component :is="sectionMeta.icon" class="size-4 text-muted-foreground shrink-0" />
           <h1 class="text-sm sm:text-base font-semibold truncate">{{ sectionMeta.title }}</h1>
         </div>
       </div>
-        <div class="mx-auto w-full max-w-3xl px-3 sm:px-6 lg:px-8 pt-6 md:pt-10 pb-10 space-y-6">
+        <div class="mx-auto w-full max-w-4xl px-3 sm:px-6 lg:px-8 pt-6 pb-10 space-y-4 settings-dense">
 
           <!-- Section Header -->
           <header class="space-y-1.5 pb-2 border-b">
             <div class="flex items-center gap-2.5">
-              <component :is="sectionMeta.icon" class="h-5 w-5 text-muted-foreground" />
-              <h1 class="text-xl sm:text-2xl font-semibold tracking-tight">{{ sectionMeta.title }}</h1>
+              <component :is="sectionMeta.icon" class="size-5 text-muted-foreground" />
+              <h1 class="text-xl font-semibold tracking-tight">{{ sectionMeta.title }}</h1>
             </div>
             <p v-if="sectionMeta.description" class="text-sm text-muted-foreground">
               {{ sectionMeta.description }}
@@ -2747,7 +2747,7 @@ watch(isWindows, () => {
           </header>
 
           <!-- Appearance Section -->
-          <div v-show="activeSection === 'appearance'" class="space-y-6">
+          <div v-show="activeSection === 'appearance'" class="space-y-4">
             <Card>
               <CardHeader>
                 <CardTitle>{{ t('settings.theme') }}</CardTitle>
@@ -2756,13 +2756,13 @@ watch(isWindows, () => {
               <CardContent>
                 <div class="grid grid-cols-3 gap-2 sm:max-w-md">
                   <Button :variant="theme === 'light' ? 'default' : 'outline'" size="sm" class="justify-center" @click="setTheme('light')">
-                    <Sun class="h-4 w-4 mr-1.5" />{{ t('settings.lightMode') }}
+                    <Sun class="size-4 mr-1.5" />{{ t('settings.lightMode') }}
                   </Button>
                   <Button :variant="theme === 'dark' ? 'default' : 'outline'" size="sm" class="justify-center" @click="setTheme('dark')">
-                    <Moon class="h-4 w-4 mr-1.5" />{{ t('settings.darkMode') }}
+                    <Moon class="size-4 mr-1.5" />{{ t('settings.darkMode') }}
                   </Button>
                   <Button :variant="theme === 'system' ? 'default' : 'outline'" size="sm" class="justify-center" @click="setTheme('system')">
-                    <Monitor class="h-4 w-4 mr-1.5" />{{ t('settings.systemMode') }}
+                    <Monitor class="size-4 mr-1.5" />{{ t('settings.systemMode') }}
                   </Button>
                 </div>
               </CardContent>
@@ -2786,21 +2786,21 @@ watch(isWindows, () => {
               <CardContent class="space-y-1">
                 <div class="flex items-center justify-between gap-4 px-3 py-3">
                   <Label for="feature-web-terminal" class="flex min-w-0 items-center gap-2 font-normal">
-                    <Terminal class="h-4 w-4 shrink-0 text-muted-foreground" />
+                    <Terminal class="size-4 shrink-0 text-muted-foreground" />
                     <span class="truncate">{{ t('actionbar.webTerminal') }}</span>
                   </Label>
                   <Switch id="feature-web-terminal" v-model="featureVisibility.webTerminal" />
                 </div>
                 <div class="flex items-center justify-between gap-4 px-3 py-3">
                   <Label for="feature-computer-use" class="flex min-w-0 items-center gap-2 font-normal">
-                    <Bot class="h-4 w-4 shrink-0 text-muted-foreground" />
+                    <Bot class="size-4 shrink-0 text-muted-foreground" />
                     <span class="truncate">{{ t('settings.computerUseAgent') }}</span>
                   </Label>
                   <Switch id="feature-computer-use" v-model="featureVisibility.computerUse" />
                 </div>
                 <div class="flex items-center justify-between gap-4 px-3 py-3">
                   <Label for="feature-paste-text" class="flex min-w-0 items-center gap-2 font-normal">
-                    <ClipboardPaste class="h-4 w-4 shrink-0 text-muted-foreground" />
+                    <ClipboardPaste class="size-4 shrink-0 text-muted-foreground" />
                     <span class="truncate">{{ t('settings.pasteText') }}</span>
                   </Label>
                   <Switch id="feature-paste-text" v-model="featureVisibility.pasteText" />
@@ -2810,7 +2810,7 @@ watch(isWindows, () => {
           </div>
 
           <!-- Account Section -->
-          <div v-show="activeSection === 'account'" class="space-y-6">
+          <div v-show="activeSection === 'account'" class="space-y-4">
             <Card>
               <CardHeader>
                 <CardTitle>{{ t('settings.username') }}</CardTitle>
@@ -2826,12 +2826,12 @@ watch(isWindows, () => {
                   <Input id="account-username-password" v-model="usernamePassword" type="password" autocomplete="current-password" />
                 </div>
                 <p v-if="usernameError" class="text-xs text-destructive">{{ usernameError }}</p>
-                <p v-else-if="usernameSaved" class="flex items-center gap-1.5 text-xs text-success"><Check class="h-3.5 w-3.5" />{{ t('common.success') }}</p>
+                <p v-else-if="usernameSaved" class="flex items-center gap-1.5 text-xs text-success"><Check class="size-3.5" />{{ t('common.success') }}</p>
               </CardContent>
               <CardFooter class="border-t pt-4 justify-end">
                 <Button @click="changeUsername" :disabled="usernameSaving">
-                  <Loader2 v-if="usernameSaving" class="h-4 w-4 mr-2 animate-spin" />
-                  <Save v-else class="h-4 w-4 mr-2" />
+                  <Loader2 v-if="usernameSaving" class="size-4 mr-2 animate-spin" />
+                  <Save v-else class="size-4 mr-2" />
                   {{ t('common.save') }}
                 </Button>
               </CardFooter>
@@ -2856,12 +2856,12 @@ watch(isWindows, () => {
                   <Input id="account-confirm-password" v-model="confirmPassword" type="password" autocomplete="new-password" />
                 </div>
                 <p v-if="passwordError" class="text-xs text-destructive">{{ passwordError }}</p>
-                <p v-else-if="passwordSaved" class="flex items-center gap-1.5 text-xs text-success"><Check class="h-3.5 w-3.5" />{{ t('common.success') }}</p>
+                <p v-else-if="passwordSaved" class="flex items-center gap-1.5 text-xs text-success"><Check class="size-3.5" />{{ t('common.success') }}</p>
               </CardContent>
               <CardFooter class="border-t pt-4 justify-end">
                 <Button @click="changePassword" :disabled="passwordSaving">
-                  <Loader2 v-if="passwordSaving" class="h-4 w-4 mr-2 animate-spin" />
-                  <Save v-else class="h-4 w-4 mr-2" />
+                  <Loader2 v-if="passwordSaving" class="size-4 mr-2 animate-spin" />
+                  <Save v-else class="size-4 mr-2" />
                   {{ t('common.save') }}
                 </Button>
               </CardFooter>
@@ -2885,8 +2885,8 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter class="border-t pt-4 justify-end">
                 <Button @click="saveAuthConfig" :disabled="authConfigLoading">
-                  <Loader2 v-if="authConfigLoading" class="h-4 w-4 mr-2 animate-spin" />
-                  <Save v-else class="h-4 w-4 mr-2" />
+                  <Loader2 v-if="authConfigLoading" class="size-4 mr-2 animate-spin" />
+                  <Save v-else class="size-4 mr-2" />
                   {{ t('common.save') }}
                 </Button>
               </CardFooter>
@@ -2894,7 +2894,7 @@ watch(isWindows, () => {
           </div>
 
           <!-- Video Section -->
-          <div v-show="activeSection === 'video'" class="space-y-6">
+          <div v-show="activeSection === 'video'" class="space-y-4">
             <!-- Video Device Settings -->
             <Card>
               <CardHeader class="flex flex-row items-start justify-between space-y-0">
@@ -2902,8 +2902,8 @@ watch(isWindows, () => {
                   <CardTitle>{{ t('settings.videoSettings') }}</CardTitle>
                   <CardDescription>{{ t('settings.videoSettingsDesc') }}</CardDescription>
                 </div>
-                <Button variant="ghost" size="icon" class="h-8 w-8" :aria-label="t('common.refresh')" @click="loadDevices">
-                  <RefreshCw class="h-4 w-4" />
+                <Button variant="ghost" size="icon-sm" :aria-label="t('common.refresh')" @click="loadDevices">
+                  <RefreshCw class="size-4" />
                 </Button>
               </CardHeader>
               <CardContent class="space-y-4">
@@ -3023,8 +3023,8 @@ watch(isWindows, () => {
                         :aria-label="showPasswords ? t('extensions.rustdesk.hidePassword') : t('extensions.rustdesk.showPassword')"
                         @click="showPasswords = !showPasswords"
                       >
-                        <Eye v-if="!showPasswords" class="h-4 w-4" />
-                        <EyeOff v-else class="h-4 w-4" />
+                        <Eye v-if="!showPasswords" class="size-4" />
+                        <EyeOff v-else class="size-4" />
                       </Button>
                     </div>
                   </div>
@@ -3034,15 +3034,15 @@ watch(isWindows, () => {
           </div>
 
           <!-- HID Section -->
-          <div v-show="activeSection === 'hid'" class="space-y-6">
+          <div v-show="activeSection === 'hid'" class="space-y-4">
             <Card>
               <CardHeader class="flex flex-row items-start justify-between space-y-0">
                 <div class="space-y-1.5">
                   <CardTitle>{{ t('settings.hidSettings') }}</CardTitle>
                   <CardDescription>{{ t('settings.hidSettingsDesc') }}</CardDescription>
                 </div>
-                <Button variant="ghost" size="icon" class="h-8 w-8" :aria-label="t('common.refresh')" @click="loadDevices">
-                  <RefreshCw class="h-4 w-4" />
+                <Button variant="ghost" size="icon-sm" :aria-label="t('common.refresh')" @click="loadDevices">
+                  <RefreshCw class="size-4" />
                 </Button>
               </CardHeader>
               <CardContent class="space-y-4">
@@ -3090,13 +3090,13 @@ watch(isWindows, () => {
                           <h4 class="text-sm font-medium">{{ t('settings.ch9329Descriptor') }}</h4>
                           <p class="text-sm text-muted-foreground">{{ t('settings.ch9329DescriptorDesc') }}</p>
                         </div>
-                        <Button variant="ghost" size="icon" class="h-8 w-8 shrink-0" :aria-label="t('common.refresh')" :disabled="ch9329DescriptorLoading" @click="loadCh9329Descriptor">
-                          <RefreshCw class="h-4 w-4" :class="{ 'animate-spin': ch9329DescriptorLoading }" />
+                        <Button variant="ghost" size="icon-sm" class="shrink-0" :aria-label="t('common.refresh')" :disabled="ch9329DescriptorLoading" @click="loadCh9329Descriptor">
+                          <RefreshCw class="size-4" :class="{ 'animate-spin': ch9329DescriptorLoading }" />
                         </Button>
                       </div>
                     </div>
                     <p v-if="ch9329DescriptorLoading" class="text-sm text-muted-foreground flex items-center gap-2">
-                      <Loader2 class="h-4 w-4 animate-spin" />
+                      <Loader2 class="size-4 animate-spin" />
                       {{ t('settings.ch9329DescriptorLoading') }}
                     </p>
                     <p v-else-if="ch9329DescriptorError" class="text-sm text-destructive">
@@ -3355,7 +3355,7 @@ watch(isWindows, () => {
           </div>
 
           <!-- Environment Section -->
-          <div v-show="activeSection === 'environment'" class="space-y-4 max-w-3xl">
+          <div v-show="activeSection === 'environment'" class="space-y-4">
             <Card v-if="systemStore.deviceInfo">
               <CardHeader>
                 <CardTitle>{{ t('settings.deviceInfo') }}</CardTitle>
@@ -3408,7 +3408,7 @@ watch(isWindows, () => {
                   ]"
                   @click="onRunOtgSelfCheckClick"
                 >
-                  <RefreshCw class="h-4 w-4 mr-2" :class="{ 'animate-spin': otgSelfCheckLoading }" />
+                  <RefreshCw class="size-4 mr-2" :class="{ 'animate-spin': otgSelfCheckLoading }" />
                   {{ t('settings.otgSelfCheck.run') }}
                 </Button>
               </CardHeader>
@@ -3445,7 +3445,7 @@ watch(isWindows, () => {
                     >
                       <summary class="list-none cursor-pointer px-4 py-3 flex items-center justify-between gap-3 hover:bg-muted/40">
                         <div class="flex items-center gap-2 min-w-0">
-                          <span class="inline-block h-2 w-2 rounded-full shrink-0" :class="otgGroupStatusClass(group.status)" />
+                          <span class="inline-block size-2 rounded-full shrink-0" :class="otgGroupStatusClass(group.status)" />
                           <span class="text-sm font-medium truncate leading-6">{{ t(group.titleKey) }}</span>
                         </div>
                         <div class="flex items-center gap-2 shrink-0">
@@ -3461,7 +3461,7 @@ watch(isWindows, () => {
                           class="px-4 py-3 border-b last:border-b-0"
                         >
                           <div class="flex items-start gap-2">
-                            <span class="inline-block h-2 w-2 rounded-full mt-1.5 shrink-0" :class="otgCheckLevelClass(item.level)" />
+                            <span class="inline-block size-2 rounded-full mt-1.5 shrink-0" :class="otgCheckLevelClass(item.level)" />
                             <div class="min-w-0 space-y-1">
                               <div class="flex items-center gap-2">
                                 <p class="text-sm leading-5">{{ otgCheckMessage(item) }}</p>
@@ -3503,7 +3503,7 @@ watch(isWindows, () => {
                   ]"
                   @click="onRunVideoEncoderSelfCheckClick"
                 >
-                  <RefreshCw class="h-4 w-4 mr-2" :class="{ 'animate-spin': videoEncoderSelfCheckLoading }" />
+                  <RefreshCw class="size-4 mr-2" :class="{ 'animate-spin': videoEncoderSelfCheckLoading }" />
                   {{ t('settings.encoderSelfCheck.run') }}
                 </Button>
               </CardHeader>
@@ -3569,7 +3569,7 @@ watch(isWindows, () => {
 
           </div>
 
-          <div v-show="activeSection === 'other'" class="space-y-6">
+          <div v-show="activeSection === 'other'" class="space-y-4">
             <Card>
               <CardHeader>
                 <div class="flex items-start justify-between gap-4">
@@ -3587,8 +3587,8 @@ watch(isWindows, () => {
               </CardHeader>
               <CardContent class="space-y-4">
                 <div class="flex items-center gap-2 text-sm">
-                  <Loader2 v-if="watchdogLoading" class="h-4 w-4 animate-spin text-muted-foreground" />
-                  <span v-else class="h-2.5 w-2.5 rounded-full" :class="watchdogStatusClass" />
+                  <Loader2 v-if="watchdogLoading" class="size-4 animate-spin text-muted-foreground" />
+                  <span v-else class="size-2.5 rounded-full" :class="watchdogStatusClass" />
                   <span class="font-medium">
                     {{ watchdogLoading
                       ? t('common.loading')
@@ -3617,7 +3617,7 @@ watch(isWindows, () => {
                   :disabled="usbDevicesLoading"
                   @click="fetchUsbDevices()"
                 >
-                  <RefreshCw class="h-4 w-4 mr-2" :class="{ 'animate-spin': usbDevicesLoading }" />
+                  <RefreshCw class="size-4 mr-2" :class="{ 'animate-spin': usbDevicesLoading }" />
                   {{ t('settings.usbDevices.refresh') }}
                 </Button>
               </CardHeader>
@@ -3657,7 +3657,7 @@ watch(isWindows, () => {
                               v-if="dev.authorized != null"
                               variant="outline"
                               size="sm"
-                              class="h-7 text-xs"
+                              class="text-xs"
                               :disabled="usbResetLoading"
                               @click="usbResetTarget = dev"
                             >
@@ -3701,14 +3701,14 @@ watch(isWindows, () => {
               </AlertDialogContent>
             </AlertDialog>
           </div>
-          <div v-show="activeSection === 'network'" class="space-y-6">
+          <div v-show="activeSection === 'network'" class="space-y-4">
 
             <!-- Auto-restart: restarting progress -->
             <div
               v-if="autoRestarting"
               class="flex items-center gap-3 rounded-lg border bg-card px-4 py-3 text-sm shadow-sm"
             >
-              <RefreshCw class="h-4 w-4 animate-spin text-primary shrink-0" />
+              <RefreshCw class="size-4 animate-spin text-primary shrink-0" />
               <div class="flex-1 min-w-0">
                 <p class="font-medium">{{ t('settings.autoRestarting') }}</p>
                 <p class="text-xs text-muted-foreground">
@@ -3739,7 +3739,7 @@ watch(isWindows, () => {
               <AlertDescription class="flex items-center justify-between gap-3">
               <span>{{ t('settings.autoRestartFailed') }}</span>
               <Button variant="outline" size="sm" class="text-foreground" @click="triggerAutoRestart">
-                <RefreshCw class="h-3 w-3 mr-1" />
+                <RefreshCw class="size-3 mr-1" />
                 {{ t('common.retry') }}
               </Button>
               </AlertDescription>
@@ -3807,33 +3807,33 @@ watch(isWindows, () => {
                   <div class="flex items-center gap-2">
                     <code class="font-mono text-xs sm:text-sm break-all flex-1 min-w-0">{{ previewAccessUrl }}</code>
                     <Button
-                      variant="ghost" size="icon" class="h-7 w-7 shrink-0"
+                      variant="ghost" size="icon-sm" class="shrink-0"
                       :title="t('settings.copyUrl')"
                       :aria-label="t('settings.copyUrl')"
                       @click="copyPreviewUrl"
                     >
-                      <Check v-if="previewUrlCopied" class="h-3.5 w-3.5 text-success" />
-                      <Copy v-else class="h-3.5 w-3.5" />
+                      <Check v-if="previewUrlCopied" class="size-3.5 text-success" />
+                      <Copy v-else class="size-3.5" />
                     </Button>
                     <Button
-                      variant="ghost" size="icon" class="h-7 w-7 shrink-0"
+                      variant="ghost" size="icon-sm" class="shrink-0"
                       :title="t('settings.openInBrowser')"
                       :aria-label="t('settings.openInBrowser')"
                       @click="openPreviewUrl"
                     >
-                      <ExternalLink class="h-3.5 w-3.5" />
+                      <ExternalLink class="size-3.5" />
                     </Button>
                   </div>
                 </div>
               </CardContent>
               <CardFooter class="flex items-center justify-between gap-3 border-t pt-4">
                 <p class="flex min-w-0 items-center gap-1.5 text-xs text-muted-foreground">
-                  <AlertTriangle class="h-3.5 w-3.5 shrink-0 text-warning" />
+                  <AlertTriangle class="size-3.5 shrink-0 text-warning" />
                   <span class="truncate">{{ t('settings.restartRequiredHint') }}</span>
                 </p>
                 <Button @click="saveWebServerConfig" :disabled="webServerLoading || autoRestarting">
-                  <RefreshCw v-if="autoRestarting" class="h-4 w-4 mr-2 animate-spin" />
-                  <Save v-else class="h-4 w-4 mr-2" />
+                  <RefreshCw v-if="autoRestarting" class="size-4 mr-2 animate-spin" />
+                  <Save v-else class="size-4 mr-2" />
                   {{ autoRestarting ? t('settings.restarting') : t('common.save') }}
                 </Button>
               </CardFooter>
@@ -3891,11 +3891,11 @@ watch(isWindows, () => {
                       <div v-for="(_, i) in bindAddressList" :key="`bind-${i}`" class="flex gap-2">
                         <Input v-model="bindAddressList[i]" placeholder="192.168.1.10" />
                         <Button variant="ghost" size="icon" :aria-label="t('common.delete')" @click="removeBindAddress(i)">
-                          <Trash2 class="h-4 w-4" />
+                          <Trash2 class="size-4" />
                         </Button>
                       </div>
                       <Button variant="outline" size="sm" @click="addBindAddress">
-                        <Plus class="h-4 w-4 mr-1" />
+                        <Plus class="size-4 mr-1" />
                         {{ t('settings.addBindAddress') }}
                       </Button>
                       <p v-if="bindAddressError" class="text-xs text-destructive">{{ bindAddressError }}</p>
@@ -3911,12 +3911,12 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter class="flex items-center justify-between gap-3 border-t pt-4">
                 <p class="flex min-w-0 items-center gap-1.5 text-xs text-muted-foreground">
-                  <AlertTriangle class="h-3.5 w-3.5 shrink-0 text-warning" />
+                  <AlertTriangle class="size-3.5 shrink-0 text-warning" />
                   <span class="truncate">{{ t('settings.restartRequiredHint') }}</span>
                 </p>
                 <Button @click="saveWebServerConfig" :disabled="webServerLoading || !!bindAddressError || autoRestarting">
-                  <RefreshCw v-if="autoRestarting" class="h-4 w-4 mr-2 animate-spin" />
-                  <Save v-else class="h-4 w-4 mr-2" />
+                  <RefreshCw v-if="autoRestarting" class="size-4 mr-2 animate-spin" />
+                  <Save v-else class="size-4 mr-2" />
                   {{ autoRestarting ? t('settings.restarting') : t('common.save') }}
                 </Button>
               </CardFooter>
@@ -3942,12 +3942,12 @@ watch(isWindows, () => {
                   <Button
                     variant="ghost"
                     size="sm"
-                    class="text-destructive hover:text-destructive h-7 text-xs"
+                    class="text-destructive hover:text-destructive text-xs"
                     :disabled="certClearing || autoRestarting"
                     @click="clearCertificate"
                   >
-                    <RefreshCw v-if="certClearing || autoRestarting" class="h-3 w-3 mr-1 animate-spin" />
-                    <Trash2 v-else class="h-3 w-3 mr-1" />
+                    <RefreshCw v-if="certClearing || autoRestarting" class="size-3 mr-1 animate-spin" />
+                    <Trash2 v-else class="size-3 mr-1" />
                     {{ autoRestarting ? t('settings.restarting') : t('settings.sslCertClear') }}
                   </Button>
                   </AlertDescription>
@@ -3980,15 +3980,15 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter class="flex items-center justify-between gap-3 border-t pt-4">
                 <p class="flex min-w-0 items-center gap-1.5 text-xs text-muted-foreground">
-                  <AlertTriangle class="h-3.5 w-3.5 shrink-0 text-warning" />
+                  <AlertTriangle class="size-3.5 shrink-0 text-warning" />
                   <span class="truncate">{{ t('settings.restartRequiredHint') }}</span>
                 </p>
                 <Button
                   :disabled="certSaving || autoRestarting || !sslCertPem.trim() || !sslKeyPem.trim()"
                   @click="saveCertificate"
                 >
-                  <RefreshCw v-if="certSaving || autoRestarting" class="h-4 w-4 mr-2 animate-spin" />
-                  <Save v-else class="h-4 w-4 mr-2" />
+                  <RefreshCw v-if="certSaving || autoRestarting" class="size-4 mr-2 animate-spin" />
+                  <Save v-else class="size-4 mr-2" />
                   {{ autoRestarting ? t('settings.restarting') : t('settings.sslCertSave') }}
                 </Button>
               </CardFooter>
@@ -3996,7 +3996,7 @@ watch(isWindows, () => {
           </div>
 
           <!-- ATX Section -->
-          <div v-show="activeSection === 'atx'" class="space-y-6">
+          <div v-show="activeSection === 'atx'" class="space-y-4">
             <Card>
               <CardHeader>
                 <CardTitle>{{ t('settings.atxPowerManagement') }}</CardTitle>
@@ -4012,8 +4012,8 @@ watch(isWindows, () => {
                       </SelectContent>
                     </Select>
                   </div>
-                  <Button variant="ghost" size="icon" class="h-9 w-9 shrink-0" :aria-label="t('common.refresh')" @click="loadAtxDevices">
-                    <RefreshCw class="h-4 w-4" />
+                  <Button variant="ghost" size="icon-sm" class="shrink-0" :aria-label="t('common.refresh')" @click="loadAtxDevices">
+                    <RefreshCw class="size-4" />
                   </Button>
                 </div>
 
@@ -4167,7 +4167,7 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter class="border-t pt-4 justify-end">
                 <Button :disabled="atxSaving" @click="saveAtxSettings">
-                  <Loader2 v-if="atxSaving" class="h-4 w-4 mr-2 animate-spin" /><Check v-else-if="atxSaved" class="h-4 w-4 mr-2" /><Save v-else class="h-4 w-4 mr-2" />{{ atxSaving ? t('actionbar.applying') : atxSaved ? t('common.success') : t('common.save') }}
+                  <Loader2 v-if="atxSaving" class="size-4 mr-2 animate-spin" /><Check v-else-if="atxSaved" class="size-4 mr-2" /><Save v-else class="size-4 mr-2" />{{ atxSaving ? t('actionbar.applying') : atxSaved ? t('common.success') : t('common.save') }}
                 </Button>
               </CardFooter>
             </Card>
@@ -4190,14 +4190,14 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter class="border-t pt-4 justify-end">
                 <Button :disabled="wolSaving" @click="saveWolSettings">
-                  <Loader2 v-if="wolSaving" class="h-4 w-4 mr-2 animate-spin" /><Check v-else-if="wolSaved" class="h-4 w-4 mr-2" /><Save v-else class="h-4 w-4 mr-2" />{{ wolSaving ? t('actionbar.applying') : wolSaved ? t('common.success') : t('common.save') }}
+                  <Loader2 v-if="wolSaving" class="size-4 mr-2 animate-spin" /><Check v-else-if="wolSaved" class="size-4 mr-2" /><Save v-else class="size-4 mr-2" />{{ wolSaving ? t('actionbar.applying') : wolSaved ? t('common.success') : t('common.save') }}
                 </Button>
               </CardFooter>
             </Card>
           </div>
 
           <!-- ttyd Section -->
-          <div v-show="activeSection === 'ext-ttyd'" class="space-y-6">
+          <div v-show="activeSection === 'ext-ttyd'" class="space-y-4">
             <Card>
               <CardHeader>
                 <div class="flex items-center justify-between">
@@ -4228,7 +4228,7 @@ watch(isWindows, () => {
                         variant="default"
                         @click="openTerminal"
                       >
-                        <Terminal class="h-4 w-4 mr-1" />
+                        <Terminal class="size-4 mr-1" />
                         {{ t('extensions.ttyd.open') }}
                       </Button>
                       <Button
@@ -4237,7 +4237,7 @@ watch(isWindows, () => {
                         @click="startExtension('ttyd')"
                         :disabled="extensionsLoading"
                       >
-                        <Play class="h-4 w-4 mr-1" />
+                        <Play class="size-4 mr-1" />
                         {{ t('extensions.start') }}
                       </Button>
                       <Button
@@ -4247,7 +4247,7 @@ watch(isWindows, () => {
                         @click="stopExtension('ttyd')"
                         :disabled="extensionsLoading"
                       >
-                        <Square class="h-4 w-4 mr-1" />
+                        <Square class="size-4 mr-1" />
                         {{ t('extensions.stop') }}
                       </Button>
                     </div>
@@ -4267,11 +4267,11 @@ watch(isWindows, () => {
                   <!-- Logs -->
                   <div class="space-y-2">
                     <Collapsible v-model:open="showLogs.ttyd" @update:open="open => open && refreshExtensionLogs('ttyd')">
-                      <CollapsibleTrigger as-child><Button type="button" variant="ghost" size="sm" class="gap-2 text-muted-foreground"><ChevronRight :class="['h-4 w-4 transition-transform', showLogs.ttyd ? 'rotate-90' : '']" />{{ t('extensions.viewLogs') }}</Button></CollapsibleTrigger>
+                      <CollapsibleTrigger as-child><Button type="button" variant="ghost" size="sm" class="gap-2 text-muted-foreground"><ChevronRight :class="['size-4 transition-transform', showLogs.ttyd ? 'rotate-90' : '']" />{{ t('extensions.viewLogs') }}</Button></CollapsibleTrigger>
                       <CollapsibleContent class="space-y-2 pt-2">
                       <pre class="p-3 bg-muted rounded-md text-xs max-h-48 overflow-auto font-mono">{{ (extensionLogs.ttyd || []).join('\n') || t('extensions.noLogs') }}</pre>
                       <Button variant="ghost" size="sm" @click="refreshExtensionLogs('ttyd')">
-                        <RefreshCw class="h-3 w-3 mr-1" />
+                        <RefreshCw class="size-3 mr-1" />
                         {{ t('common.refresh') }}
                       </Button>
                       </CollapsibleContent>
@@ -4281,14 +4281,14 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter v-if="extensions?.ttyd?.available" class="border-t pt-4 justify-end">
                 <Button :disabled="loading || isExtRunning(extensions?.ttyd?.status)" @click="saveExtensionConfig('ttyd')">
-                  <Loader2 v-if="loading" class="h-4 w-4 mr-2 animate-spin" /><Check v-else-if="saved" class="h-4 w-4 mr-2" /><Save v-else class="h-4 w-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
+                  <Loader2 v-if="loading" class="size-4 mr-2 animate-spin" /><Check v-else-if="saved" class="size-4 mr-2" /><Save v-else class="size-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
                 </Button>
               </CardFooter>
             </Card>
           </div>
 
           <!-- Remote Access Section -->
-          <div v-show="activeSection === 'ext-remote-access'" class="space-y-6">
+          <div v-show="activeSection === 'ext-remote-access'" class="space-y-4">
             <Card>
               <CardHeader>
                 <div class="flex items-center justify-between">
@@ -4319,7 +4319,7 @@ watch(isWindows, () => {
                         @click="startExtension('gostc')"
                         :disabled="extensionsLoading || !!gostcValidationMessage"
                       >
-                        <Play class="h-4 w-4 mr-1" />
+                        <Play class="size-4 mr-1" />
                         {{ t('extensions.start') }}
                       </Button>
                       <Button
@@ -4329,7 +4329,7 @@ watch(isWindows, () => {
                         @click="stopExtension('gostc')"
                         :disabled="extensionsLoading"
                       >
-                        <Square class="h-4 w-4 mr-1" />
+                        <Square class="size-4 mr-1" />
                         {{ t('extensions.stop') }}
                       </Button>
                     </div>
@@ -4365,11 +4365,11 @@ watch(isWindows, () => {
                   <!-- Logs -->
                   <div class="space-y-2">
                     <Collapsible v-model:open="showLogs.gostc" @update:open="open => open && refreshExtensionLogs('gostc')">
-                      <CollapsibleTrigger as-child><Button type="button" variant="ghost" size="sm" class="gap-2 text-muted-foreground"><ChevronRight :class="['h-4 w-4 transition-transform', showLogs.gostc ? 'rotate-90' : '']" />{{ t('extensions.viewLogs') }}</Button></CollapsibleTrigger>
+                      <CollapsibleTrigger as-child><Button type="button" variant="ghost" size="sm" class="gap-2 text-muted-foreground"><ChevronRight :class="['size-4 transition-transform', showLogs.gostc ? 'rotate-90' : '']" />{{ t('extensions.viewLogs') }}</Button></CollapsibleTrigger>
                       <CollapsibleContent class="space-y-2 pt-2">
                       <pre class="p-3 bg-muted rounded-md text-xs max-h-48 overflow-auto font-mono">{{ (extensionLogs.gostc || []).join('\n') || t('extensions.noLogs') }}</pre>
                       <Button variant="ghost" size="sm" @click="refreshExtensionLogs('gostc')">
-                        <RefreshCw class="h-3 w-3 mr-1" />
+                        <RefreshCw class="size-3 mr-1" />
                         {{ t('common.refresh') }}
                       </Button>
                       </CollapsibleContent>
@@ -4379,7 +4379,7 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter v-if="extensions?.gostc?.available" class="border-t pt-4 justify-end">
                 <Button :disabled="loading || isExtRunning(extensions?.gostc?.status)" @click="saveExtensionConfig('gostc')">
-                  <Loader2 v-if="loading" class="h-4 w-4 mr-2 animate-spin" /><Check v-else-if="saved" class="h-4 w-4 mr-2" /><Save v-else class="h-4 w-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
+                  <Loader2 v-if="loading" class="size-4 mr-2 animate-spin" /><Check v-else-if="saved" class="size-4 mr-2" /><Save v-else class="size-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
                 </Button>
               </CardFooter>
             </Card>
@@ -4414,7 +4414,7 @@ watch(isWindows, () => {
                         @click="startExtension('easytier')"
                         :disabled="extensionsLoading || !!easytierValidationMessage"
                       >
-                        <Play class="h-4 w-4 mr-1" />
+                        <Play class="size-4 mr-1" />
                         {{ t('extensions.start') }}
                       </Button>
                       <Button
@@ -4424,7 +4424,7 @@ watch(isWindows, () => {
                         @click="stopExtension('easytier')"
                         :disabled="extensionsLoading"
                       >
-                        <Square class="h-4 w-4 mr-1" />
+                        <Square class="size-4 mr-1" />
                         {{ t('extensions.stop') }}
                       </Button>
                     </div>
@@ -4453,11 +4453,11 @@ watch(isWindows, () => {
                         <div v-for="(_, i) in extConfig.easytier.peer_urls" :key="i" class="flex gap-2">
                           <Input v-model="extConfig.easytier.peer_urls[i]" placeholder="tcp://1.2.3.4:11010" :disabled="isExtRunning(extensions?.easytier?.status)" />
                           <Button variant="ghost" size="icon" :aria-label="t('common.delete')" @click="removeEasytierPeer(i)" :disabled="isExtRunning(extensions?.easytier?.status)">
-                            <Trash2 class="h-4 w-4" />
+                            <Trash2 class="size-4" />
                           </Button>
                         </div>
                         <Button variant="outline" size="sm" @click="addEasytierPeer" :disabled="isExtRunning(extensions?.easytier?.status)">
-                          <Plus class="h-4 w-4 mr-1" />
+                          <Plus class="size-4 mr-1" />
                           {{ t('extensions.easytier.addPeer') }}
                         </Button>
                       </div>
@@ -4472,11 +4472,11 @@ watch(isWindows, () => {
                   <!-- Logs -->
                   <div class="space-y-2">
                     <Collapsible v-model:open="showLogs.easytier" @update:open="open => open && refreshExtensionLogs('easytier')">
-                      <CollapsibleTrigger as-child><Button type="button" variant="ghost" size="sm" class="gap-2 text-muted-foreground"><ChevronRight :class="['h-4 w-4 transition-transform', showLogs.easytier ? 'rotate-90' : '']" />{{ t('extensions.viewLogs') }}</Button></CollapsibleTrigger>
+                      <CollapsibleTrigger as-child><Button type="button" variant="ghost" size="sm" class="gap-2 text-muted-foreground"><ChevronRight :class="['size-4 transition-transform', showLogs.easytier ? 'rotate-90' : '']" />{{ t('extensions.viewLogs') }}</Button></CollapsibleTrigger>
                       <CollapsibleContent class="space-y-2 pt-2">
                       <pre class="p-3 bg-muted rounded-md text-xs max-h-48 overflow-auto font-mono">{{ (extensionLogs.easytier || []).join('\n') || t('extensions.noLogs') }}</pre>
                       <Button variant="ghost" size="sm" @click="refreshExtensionLogs('easytier')">
-                        <RefreshCw class="h-3 w-3 mr-1" />
+                        <RefreshCw class="size-3 mr-1" />
                         {{ t('common.refresh') }}
                       </Button>
                       </CollapsibleContent>
@@ -4486,7 +4486,7 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter v-if="extensions?.easytier?.available" class="border-t pt-4 justify-end">
                 <Button :disabled="loading || isExtRunning(extensions?.easytier?.status)" @click="saveExtensionConfig('easytier')">
-                  <Loader2 v-if="loading" class="h-4 w-4 mr-2 animate-spin" /><Check v-else-if="saved" class="h-4 w-4 mr-2" /><Save v-else class="h-4 w-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
+                  <Loader2 v-if="loading" class="size-4 mr-2 animate-spin" /><Check v-else-if="saved" class="size-4 mr-2" /><Save v-else class="size-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
                 </Button>
               </CardFooter>
             </Card>
@@ -4520,7 +4520,7 @@ watch(isWindows, () => {
                         @click="startExtension('frpc')"
                         :disabled="extensionsLoading || !!frpcValidationMessage"
                       >
-                        <Play class="h-4 w-4 mr-1" />
+                        <Play class="size-4 mr-1" />
                         {{ t('extensions.start') }}
                       </Button>
                       <Button
@@ -4530,7 +4530,7 @@ watch(isWindows, () => {
                         @click="stopExtension('frpc')"
                         :disabled="extensionsLoading"
                       >
-                        <Square class="h-4 w-4 mr-1" />
+                        <Square class="size-4 mr-1" />
                         {{ t('extensions.stop') }}
                       </Button>
                     </div>
@@ -4642,11 +4642,11 @@ watch(isWindows, () => {
                   </div>
                   <div class="space-y-2">
                     <Collapsible v-model:open="showLogs.frpc" @update:open="open => open && refreshExtensionLogs('frpc')">
-                      <CollapsibleTrigger as-child><Button type="button" variant="ghost" size="sm" class="gap-2 text-muted-foreground"><ChevronRight :class="['h-4 w-4 transition-transform', showLogs.frpc ? 'rotate-90' : '']" />{{ t('extensions.viewLogs') }}</Button></CollapsibleTrigger>
+                      <CollapsibleTrigger as-child><Button type="button" variant="ghost" size="sm" class="gap-2 text-muted-foreground"><ChevronRight :class="['size-4 transition-transform', showLogs.frpc ? 'rotate-90' : '']" />{{ t('extensions.viewLogs') }}</Button></CollapsibleTrigger>
                       <CollapsibleContent class="space-y-2 pt-2">
                       <pre class="p-3 bg-muted rounded-md text-xs max-h-48 overflow-auto font-mono">{{ (extensionLogs.frpc || []).join('\n') || t('extensions.noLogs') }}</pre>
                       <Button variant="ghost" size="sm" @click="refreshExtensionLogs('frpc')">
-                        <RefreshCw class="h-3 w-3 mr-1" />
+                        <RefreshCw class="size-3 mr-1" />
                         {{ t('common.refresh') }}
                       </Button>
                       </CollapsibleContent>
@@ -4656,14 +4656,14 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter v-if="extensions?.frpc?.available" class="border-t pt-4 justify-end">
                 <Button :disabled="loading || isExtRunning(extensions?.frpc?.status)" @click="saveExtensionConfig('frpc')">
-                  <Loader2 v-if="loading" class="h-4 w-4 mr-2 animate-spin" /><Check v-else-if="saved" class="h-4 w-4 mr-2" /><Save v-else class="h-4 w-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
+                  <Loader2 v-if="loading" class="size-4 mr-2 animate-spin" /><Check v-else-if="saved" class="size-4 mr-2" /><Save v-else class="size-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
                 </Button>
               </CardFooter>
             </Card>
           </div>
 
           <!-- RTSP Section -->
-          <div v-show="activeSection === 'third-party-access'" class="space-y-6">
+          <div v-show="activeSection === 'third-party-access'" class="space-y-4">
             <Card>
               <CardHeader>
                 <div class="flex items-center justify-between">
@@ -4675,8 +4675,8 @@ watch(isWindows, () => {
                     <Badge :variant="rtspStatus?.service_status === 'running' ? 'default' : 'secondary'">
                       {{ getRtspServiceStatusText(rtspStatus?.service_status) }}
                     </Badge>
-                    <Button variant="ghost" size="icon" class="h-8 w-8" :aria-label="t('common.refresh')" @click="loadRtspConfig" :disabled="rtspLoading">
-                      <RefreshCw :class="['h-4 w-4', rtspLoading ? 'animate-spin' : '']" />
+                    <Button variant="ghost" size="icon-sm" :aria-label="t('common.refresh')" @click="loadRtspConfig" :disabled="rtspLoading">
+                      <RefreshCw :class="['size-4', rtspLoading ? 'animate-spin' : '']" />
                     </Button>
                   </div>
                 </div>
@@ -4694,7 +4694,7 @@ watch(isWindows, () => {
                       @click="startRtsp"
                       :disabled="rtspLoading || rtspStatus?.service_status === 'starting'"
                     >
-                      <Play class="h-4 w-4 mr-1" />
+                      <Play class="size-4 mr-1" />
                       {{ t('extensions.start') }}
                     </Button>
                     <Button
@@ -4704,7 +4704,7 @@ watch(isWindows, () => {
                       @click="stopRtsp"
                       :disabled="rtspLoading"
                     >
-                      <Square class="h-4 w-4 mr-1" />
+                      <Square class="size-4 mr-1" />
                       {{ t('extensions.stop') }}
                     </Button>
                   </div>
@@ -4767,8 +4767,8 @@ watch(isWindows, () => {
                           :aria-label="showPasswords ? t('extensions.rustdesk.hidePassword') : t('extensions.rustdesk.showPassword')"
                           @click="showPasswords = !showPasswords"
                         >
-                          <Eye v-if="!showPasswords" class="h-4 w-4" />
-                          <EyeOff v-else class="h-4 w-4" />
+                          <Eye v-if="!showPasswords" class="size-4" />
+                          <EyeOff v-else class="size-4" />
                         </Button>
                       </div>
                     </div>
@@ -4782,14 +4782,14 @@ watch(isWindows, () => {
                   <code class="truncate font-mono">{{ rtspStreamUrl }}</code>
                 </div>
                 <Button class="shrink-0" :disabled="loading || rtspLoading" @click="saveRtspConfig">
-                  <Loader2 v-if="loading" class="h-4 w-4 mr-2 animate-spin" /><Check v-else-if="saved" class="h-4 w-4 mr-2" /><Save v-else class="h-4 w-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
+                  <Loader2 v-if="loading" class="size-4 mr-2 animate-spin" /><Check v-else-if="saved" class="size-4 mr-2" /><Save v-else class="size-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
                 </Button>
               </CardFooter>
             </Card>
           </div>
 
           <!-- VNC Section -->
-          <div v-show="activeSection === 'third-party-access'" class="space-y-6">
+          <div v-show="activeSection === 'third-party-access'" class="space-y-4">
             <Card>
               <CardHeader>
                 <div class="flex items-center justify-between">
@@ -4801,8 +4801,8 @@ watch(isWindows, () => {
                     <Badge :variant="vncStatus?.service_status === 'running' ? 'default' : 'secondary'">
                       {{ getVncServiceStatusText(vncStatus?.service_status) }}
                     </Badge>
-                    <Button variant="ghost" size="icon" class="h-8 w-8" :aria-label="t('common.refresh')" @click="loadVncConfig" :disabled="vncLoading">
-                      <RefreshCw :class="['h-4 w-4', vncLoading ? 'animate-spin' : '']" />
+                    <Button variant="ghost" size="icon-sm" :aria-label="t('common.refresh')" @click="loadVncConfig" :disabled="vncLoading">
+                      <RefreshCw :class="['size-4', vncLoading ? 'animate-spin' : '']" />
                     </Button>
                   </div>
                 </div>
@@ -4824,7 +4824,7 @@ watch(isWindows, () => {
                       @click="startVnc"
                       :disabled="vncLoading || vncStatus?.service_status === 'starting'"
                     >
-                      <Play class="h-4 w-4 mr-1" />
+                      <Play class="size-4 mr-1" />
                       {{ t('extensions.start') }}
                     </Button>
                     <Button
@@ -4834,7 +4834,7 @@ watch(isWindows, () => {
                       @click="stopVnc"
                       :disabled="vncLoading"
                     >
-                      <Square class="h-4 w-4 mr-1" />
+                      <Square class="size-4 mr-1" />
                       {{ t('extensions.stop') }}
                     </Button>
                   </div>
@@ -4889,8 +4889,8 @@ watch(isWindows, () => {
                           :aria-label="showPasswords ? t('extensions.rustdesk.hidePassword') : t('extensions.rustdesk.showPassword')"
                           @click="showPasswords = !showPasswords"
                         >
-                          <Eye v-if="!showPasswords" class="h-4 w-4" />
-                          <EyeOff v-else class="h-4 w-4" />
+                          <Eye v-if="!showPasswords" class="size-4" />
+                          <EyeOff v-else class="size-4" />
                         </Button>
                       </div>
                     </div>
@@ -4904,14 +4904,14 @@ watch(isWindows, () => {
                   <code class="truncate font-mono">{{ vncStreamUrl }}</code>
                 </div>
                 <Button class="shrink-0" :disabled="loading || vncLoading" @click="saveVncConfig">
-                  <Loader2 v-if="loading" class="h-4 w-4 mr-2 animate-spin" /><Check v-else-if="saved" class="h-4 w-4 mr-2" /><Save v-else class="h-4 w-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
+                  <Loader2 v-if="loading" class="size-4 mr-2 animate-spin" /><Check v-else-if="saved" class="size-4 mr-2" /><Save v-else class="size-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
                 </Button>
               </CardFooter>
             </Card>
           </div>
 
           <!-- RustDesk Section -->
-          <div v-show="activeSection === 'third-party-access'" class="space-y-6">
+          <div v-show="activeSection === 'third-party-access'" class="space-y-4">
             <Card>
               <CardHeader>
                 <div class="flex items-center justify-between">
@@ -4923,8 +4923,8 @@ watch(isWindows, () => {
                     <Badge :variant="rustdeskStatus?.service_status === 'running' ? 'default' : 'secondary'">
                       {{ getRustdeskServiceStatusText(rustdeskStatus?.service_status) }}
                     </Badge>
-                    <Button variant="ghost" size="icon" class="h-8 w-8" :aria-label="t('common.refresh')" @click="loadRustdeskConfig" :disabled="rustdeskLoading">
-                      <RefreshCw :class="['h-4 w-4', rustdeskLoading ? 'animate-spin' : '']" />
+                    <Button variant="ghost" size="icon-sm" :aria-label="t('common.refresh')" @click="loadRustdeskConfig" :disabled="rustdeskLoading">
+                      <RefreshCw :class="['size-4', rustdeskLoading ? 'animate-spin' : '']" />
                     </Button>
                   </div>
                 </div>
@@ -4948,7 +4948,7 @@ watch(isWindows, () => {
                       @click="startRustdesk"
                       :disabled="rustdeskLoading"
                     >
-                      <Play class="h-4 w-4 mr-1" />
+                      <Play class="size-4 mr-1" />
                       {{ t('extensions.start') }}
                     </Button>
                     <Button
@@ -4958,7 +4958,7 @@ watch(isWindows, () => {
                       @click="stopRustdesk"
                       :disabled="rustdeskLoading"
                     >
-                      <Square class="h-4 w-4 mr-1" />
+                      <Square class="size-4 mr-1" />
                       {{ t('extensions.stop') }}
                     </Button>
                   </div>
@@ -5022,8 +5022,8 @@ watch(isWindows, () => {
                           :aria-label="showPasswords ? t('extensions.rustdesk.hidePassword') : t('extensions.rustdesk.showPassword')"
                           @click="showPasswords = !showPasswords"
                         >
-                          <Eye v-if="!showPasswords" class="h-4 w-4" />
-                          <EyeOff v-else class="h-4 w-4" />
+                          <Eye v-if="!showPasswords" class="size-4" />
+                          <EyeOff v-else class="size-4" />
                         </Button>
                       </div>
                     </div>
@@ -5043,16 +5043,16 @@ watch(isWindows, () => {
                       <Button
                         variant="ghost"
                         size="icon"
-                        class="h-8 w-8"
+                        class="size-8"
                         :aria-label="t('extensions.rustdesk.copyId')"
                         @click="copyToClipboard(rustdeskConfig?.device_id || '', 'id')"
                         :disabled="!rustdeskConfig?.device_id"
                       >
-                        <Check v-if="rustdeskCopied === 'id'" class="h-4 w-4 text-success" />
-                        <Copy v-else class="h-4 w-4" />
+                        <Check v-if="rustdeskCopied === 'id'" class="size-4 text-success" />
+                        <Copy v-else class="size-4" />
                       </Button>
                       <Button variant="outline" size="sm" @click="regenerateRustdeskId" :disabled="rustdeskLoading">
-                        <RefreshCw class="h-4 w-4 mr-1" />
+                        <RefreshCw class="size-4 mr-1" />
                         {{ t('extensions.rustdesk.regenerateId') }}
                       </Button>
                     </div>
@@ -5066,16 +5066,16 @@ watch(isWindows, () => {
                       <Button
                         variant="ghost"
                         size="icon"
-                        class="h-8 w-8"
+                        class="size-8"
                         :aria-label="t('extensions.rustdesk.copyPassword')"
                         @click="copyToClipboard(rustdeskPassword?.device_password || '', 'password')"
                         :disabled="!rustdeskPassword?.device_password"
                       >
-                        <Check v-if="rustdeskCopied === 'password'" class="h-4 w-4 text-success" />
-                        <Copy v-else class="h-4 w-4" />
+                        <Check v-if="rustdeskCopied === 'password'" class="size-4 text-success" />
+                        <Copy v-else class="size-4" />
                       </Button>
                       <Button variant="outline" size="sm" @click="regenerateRustdeskPassword" :disabled="rustdeskLoading">
-                        <RefreshCw class="h-4 w-4 mr-1" />
+                        <RefreshCw class="size-4 mr-1" />
                         {{ t('extensions.rustdesk.regeneratePassword') }}
                       </Button>
                     </div>
@@ -5094,20 +5094,20 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter class="border-t pt-4 justify-end">
                 <Button :disabled="loading || rustdeskLoading" @click="saveRustdeskConfig">
-                  <Loader2 v-if="loading" class="h-4 w-4 mr-2 animate-spin" /><Check v-else-if="saved" class="h-4 w-4 mr-2" /><Save v-else class="h-4 w-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
+                  <Loader2 v-if="loading" class="size-4 mr-2 animate-spin" /><Check v-else-if="saved" class="size-4 mr-2" /><Save v-else class="size-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
                 </Button>
               </CardFooter>
             </Card>
           </div>
 
           <!-- Redfish Section -->
-          <div v-show="activeSection === 'third-party-access'" class="space-y-6">
+          <div v-show="activeSection === 'third-party-access'" class="space-y-4">
             <!-- Auto-restart: restarting progress -->
             <div
               v-if="autoRestarting"
               class="flex items-center gap-3 rounded-lg border bg-card px-4 py-3 text-sm shadow-sm"
             >
-              <RefreshCw class="h-4 w-4 animate-spin text-primary shrink-0" />
+              <RefreshCw class="size-4 animate-spin text-primary shrink-0" />
               <div class="flex-1 min-w-0">
                 <p class="font-medium">{{ t('settings.autoRestarting') }}</p>
                 <p class="text-xs text-muted-foreground">
@@ -5138,7 +5138,7 @@ watch(isWindows, () => {
               <AlertDescription class="flex items-center justify-between gap-3">
               <span>{{ t('settings.autoRestartFailed') }}</span>
               <Button variant="outline" size="sm" class="text-foreground" @click="triggerAutoRestart">
-                <RefreshCw class="h-3 w-3 mr-1" />
+                <RefreshCw class="size-3 mr-1" />
                 {{ t('common.retry') }}
               </Button>
               </AlertDescription>
@@ -5161,12 +5161,12 @@ watch(isWindows, () => {
               </CardContent>
               <CardFooter class="flex items-center justify-between gap-3 border-t pt-4">
                 <p class="flex min-w-0 items-center gap-1.5 text-xs text-muted-foreground">
-                  <AlertTriangle class="h-3.5 w-3.5 shrink-0 text-warning" />
+                  <AlertTriangle class="size-3.5 shrink-0 text-warning" />
                   <span class="truncate">{{ t('settings.restartRequiredHint') }}</span>
                 </p>
                 <Button @click="saveRedfishConfig" :disabled="redfishSaving || autoRestarting">
-                  <RefreshCw v-if="autoRestarting || redfishSaving" class="h-4 w-4 mr-2 animate-spin" />
-                  <Save v-else class="h-4 w-4 mr-2" />
+                  <RefreshCw v-if="autoRestarting || redfishSaving" class="size-4 mr-2 animate-spin" />
+                  <Save v-else class="size-4 mr-2" />
                   {{ autoRestarting ? t('settings.restarting') : t('common.save') }}
                 </Button>
               </CardFooter>
@@ -5174,7 +5174,7 @@ watch(isWindows, () => {
           </div>
 
           <!-- About Section -->
-          <div v-show="activeSection === 'about'" class="space-y-6">
+          <div v-show="activeSection === 'about'" class="space-y-4">
             <Card>
               <CardHeader class="flex flex-row items-start justify-between space-y-0">
                 <div class="space-y-1.5">
@@ -5184,12 +5184,12 @@ watch(isWindows, () => {
                 <Button
                   variant="ghost"
                   size="icon"
-                  class="h-8 w-8"
+                  class="size-8"
                   :aria-label="t('common.refresh')"
                   :disabled="updateRunning || updateLoading"
                   @click="loadUpdateOverview"
                 >
-                  <RefreshCw :class="['h-4 w-4', (updateLoading || updateRunning) ? 'animate-spin' : '']" />
+                  <RefreshCw :class="['size-4', (updateLoading || updateRunning) ? 'animate-spin' : '']" />
                 </Button>
               </CardHeader>
               <CardContent class="space-y-4">
@@ -5253,7 +5253,7 @@ watch(isWindows, () => {
                     :disabled="updateRunning || !updateOverview?.upgrade_available"
                     @click="startOnlineUpgrade"
                   >
-                    <RefreshCw class="h-4 w-4 mr-2" :class="updateRunning ? 'animate-spin' : ''" />
+                    <RefreshCw class="size-4 mr-2" :class="updateRunning ? 'animate-spin' : ''" />
                     {{ t('settings.startUpgrade') }}
                   </Button>
                 </div>
@@ -5267,21 +5267,21 @@ watch(isWindows, () => {
           <div v-if="['video', 'hid'].includes(activeSection)" class="sticky bottom-0 pt-3 sm:pt-4 pb-3 bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/80 border-t -mx-3 px-3 sm:-mx-6 sm:px-6 lg:-mx-8 lg:px-8">
             <div class="flex items-center justify-between gap-2 sm:gap-3">
               <p v-if="activeSection === 'hid' && !isHidFunctionSelectionValid" class="flex min-w-0 items-center gap-1.5 text-xs text-warning">
-                <AlertTriangle class="h-3.5 w-3.5 shrink-0" />
+                <AlertTriangle class="size-3.5 shrink-0" />
                 <span class="truncate">{{ t('settings.otgFunctionMinWarning') }}</span>
               </p>
               <p v-else-if="activeSection === 'hid' && !isCh9329DescriptorValid" class="flex min-w-0 items-center gap-1.5 text-xs text-warning">
-                <AlertTriangle class="h-3.5 w-3.5 shrink-0" />
+                <AlertTriangle class="size-3.5 shrink-0" />
                 <span class="truncate">{{ t('settings.ch9329StringLengthWarning') }}</span>
               </p>
               <p v-else-if="activeSection === 'hid' && config.hid_backend === 'ch9329' && ch9329DescriptorLoading" class="flex min-w-0 items-center gap-1.5 text-xs text-warning">
-                <AlertTriangle class="h-3.5 w-3.5 shrink-0" />
+                <AlertTriangle class="size-3.5 shrink-0" />
                 <span class="truncate">{{ t('settings.ch9329DescriptorLoading') }}</span>
               </p>
               <p v-if="saveError" class="text-xs text-destructive">{{ saveError }}</p>
               <p v-else class="text-xs text-muted-foreground hidden sm:block">{{ t('settings.unsavedChangesHint') }}</p>
               <Button class="shrink-0 ml-auto" :disabled="loading || (activeSection === 'hid' && !isHidSettingsValid)" @click="saveConfig">
-                <Loader2 v-if="loading" class="h-4 w-4 mr-2 animate-spin" /><Check v-else-if="saved" class="h-4 w-4 mr-2" /><Save v-else class="h-4 w-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
+                <Loader2 v-if="loading" class="size-4 mr-2 animate-spin" /><Check v-else-if="saved" class="size-4 mr-2" /><Save v-else class="size-4 mr-2" />{{ loading ? t('actionbar.applying') : saved ? t('common.success') : t('common.save') }}
               </Button>
             </div>
           </div>
@@ -5307,7 +5307,7 @@ watch(isWindows, () => {
             {{ t('common.later') }}
           </Button>
           <Button @click="restartServer" :disabled="restarting">
-            <RefreshCw v-if="restarting" class="h-4 w-4 mr-2 animate-spin" />
+            <RefreshCw v-if="restarting" class="size-4 mr-2 animate-spin" />
             {{ restarting ? t('settings.restarting') : t('common.restartNow') }}
           </Button>
         </DialogFooter>
diff --git a/web/src/views/SetupView.vue b/web/src/views/SetupView.vue
index 1074a951..33c0bf2c 100644
--- a/web/src/views/SetupView.vue
+++ b/web/src/views/SetupView.vue
@@ -535,18 +535,18 @@ const stepIcons = [User, Video, Keyboard, Puzzle]
 </script>
 
 <template>
-  <div class="min-h-screen min-h-dvh flex items-start sm:items-center justify-center bg-background px-4 py-6 sm:py-10">
+  <div class="min-h-screen min-h-dvh flex items-start sm:items-center justify-center dot-grid-bg px-4 py-6 sm:py-10">
     <Card class="w-full max-w-lg relative">
       <!-- Language Switcher -->
       <div class="absolute top-4 right-4">
         <LanguageToggleButton />
       </div>
 
-      <CardHeader class="text-center space-y-2 pt-10 sm:pt-12">
+      <CardHeader class="text-center space-y-2 pt-8">
         <div class="mx-auto flex justify-center">
-          <BrandMark size="xl" />
+          <BrandMark size="lg" />
         </div>
-        <CardTitle class="text-xl sm:text-2xl">{{ t('setup.welcome') }}</CardTitle>
+        <CardTitle class="text-xl">{{ t('setup.welcome') }}</CardTitle>
         <CardDescription>{{ t('setup.description') }}</CardDescription>
       </CardHeader>
 
@@ -807,7 +807,7 @@ const stepIcons = [User, Video, Keyboard, Puzzle]
                   {{ t('setup.advancedEncoder') }} ({{ t('common.optional') }})
                 </span>
                 <ChevronRight
-                  class="h-4 w-4 transition-transform duration-200"
+                  class="size-4 transition-transform duration-200"
                   :class="{ 'rotate-90': showAdvancedEncoder }"
                 />
               </Button>