refactor: name the merge options and drop their subtext

frontend/src/lib/components/view/batch-operations-toolbar.svelte

@@ -199,27 +199,14 @@
 						>
 							<GitMerge />
 						</DropdownMenu.Trigger>
-						<DropdownMenu.Content class="w-72">
-							<DropdownMenu.Item class="flex-col items-start gap-0.5" onclick={quickMerge}>
-								<span class="flex w-full min-w-0 items-center gap-2">
+						<DropdownMenu.Content>
+							<DropdownMenu.Item onclick={quickMerge}>
 								<GitMerge class="size-4 shrink-0" />
-									<span class="truncate">Keep “{selectedBooks[0].title}”</span>
-								</span>
-								<span class="pl-6 text-xs text-wrap text-muted-foreground">
-									Files move onto the book you selected first, which keeps its own metadata.
-								</span>
+								Merge into first selected
 							</DropdownMenu.Item>
-							<DropdownMenu.Item
-								class="flex-col items-start gap-0.5"
-								onclick={() => (mergingBooks = selectedBooks)}
-							>
-								<span class="flex items-center gap-2">
+							<DropdownMenu.Item onclick={() => (mergingBooks = selectedBooks)}>
 								<SlidersHorizontal class="size-4 shrink-0" />
-									Choose what to keep…
-								</span>
-								<span class="pl-6 text-xs text-wrap text-muted-foreground">
-									Pick the record that survives and resolve the metadata field by field.
-								</span>
+								Manual merge…
 							</DropdownMenu.Item>
 						</DropdownMenu.Content>
 					</DropdownMenu.Root>

frontend/src/routes/(root)/settings/libraries/[libraryId]/duplicates/+page.svelte

@@ -149,30 +149,14 @@
 							>
 								Merge…
 							</DropdownMenu.Trigger>
-							<DropdownMenu.Content align="end" class="w-72">
-								<DropdownMenu.Item
-									class="flex-col items-start gap-0.5"
-									onclick={() => quickMerge(group)}
-								>
-									<span class="flex w-full min-w-0 items-center gap-2">
+							<DropdownMenu.Content align="end">
+								<DropdownMenu.Item onclick={() => quickMerge(group)}>
 									<GitMerge class="size-4 shrink-0" />
-										<span class="truncate">Keep “{records[0]?.title}”</span>
-									</span>
-									<span class="pl-6 text-xs text-wrap text-muted-foreground">
-										Files move onto the first book, which keeps its own metadata.
-									</span>
+									Merge into first selected
 								</DropdownMenu.Item>
-								<DropdownMenu.Item
-									class="flex-col items-start gap-0.5"
-									onclick={() => (merging = group)}
-								>
-									<span class="flex items-center gap-2">
+								<DropdownMenu.Item onclick={() => (merging = group)}>
 									<SlidersHorizontal class="size-4 shrink-0" />
-										Choose what to keep…
-									</span>
-									<span class="pl-6 text-xs text-wrap text-muted-foreground">
-										Pick the record that survives and resolve the metadata field by field.
-									</span>
+									Manual merge…
 								</DropdownMenu.Item>
 							</DropdownMenu.Content>
 						</DropdownMenu.Root>