Add image management functionality: introduce Image entity and related API endpoints, update database schema to support image storage, and enhance UI with a new gallery feature for image selection and upload. Update translations for gallery-related terms.

frontend/src/features/admin/channels/ChannelDetail.tsx

@@ -513,18 +513,10 @@ function BumperCard({
       </div>
 
       {/* Блоки заставок */}
-      <div className="flex items-center justify-between border-t border-border pt-4">
+      <div className="border-t border-border pt-4">
         <p className="text-sm font-medium">{t('admin.channels.bumperTemplates')}</p>
-        <Button
-          size="sm"
-          variant="outline"
-          disabled={addTemplate.isPending}
-          onClick={() => addTemplate.mutate()}
-        >
-          {t('admin.channels.bumperAddTemplate')}
-        </Button>
+        <p className="text-xs text-muted-foreground">{t('admin.channels.bumperTemplatesHint')}</p>
       </div>
-      <p className="text-xs text-muted-foreground">{t('admin.channels.bumperTemplatesHint')}</p>
       <div className="flex flex-col gap-3">
         {templates.map((template) => (
           <BumperTemplateEditor
@@ -536,6 +528,16 @@ function BumperCard({
           />
         ))}
       </div>
+      <div className="flex justify-center">
+        <Button
+          size="sm"
+          variant="outline"
+          disabled={addTemplate.isPending}
+          onClick={() => addTemplate.mutate()}
+        >
+          {t('admin.channels.bumperAddTemplate')}
+        </Button>
+      </div>
     </CollapsibleCard>
   )
 }
@@ -1106,7 +1108,9 @@ function SchedulePreview({ entries }: { entries: ScheduleEntryDto[] }) {
     <ul className="flex flex-col divide-y divide-border text-sm">
       {entries.slice(0, 40).map((e) => (
         <li key={e.id} className="flex items-center gap-3 py-1.5">
-          <span className="w-28 shrink-0 text-muted-foreground">{formatTime(e.startsAtUtc)}</span>
+          <span className="shrink-0 whitespace-nowrap tabular-nums text-muted-foreground">
+            {formatTime(e.startsAtUtc)}
+          </span>
           {e.kind === 'Ad' ? (
             <Badge variant="muted">{t('air.ad')}</Badge>
           ) : e.kind === 'Bumper' ? (