feat(client): add shift-click selection to book dock

Allow users to select a range of files in the book dock by holding the shift key while clicking checkboxes, matching standard multi-select behavior.

Closes #136

client/src/features/book-dock/components/BookDockFileList.vue

@@ -37,13 +37,17 @@ const props = withDefaults(
   },
 )
 
-defineEmits<{
-  select: [number]
+const emit = defineEmits<{
+  select: [number, boolean]
   selectAll: []
   open: [BookDockFile]
   applyFetched: [number]
 }>()
 
+function onCheckboxClick(event: MouseEvent, id: number) {
+  emit('select', id, event.shiftKey)
+}
+
 function backendCoverUrl(file: BookDockFile): string {
   return `/api/v1/book-dock/files/${file.id}/cover?v=${new Date(file.updatedAt).getTime()}`
 }
@@ -234,8 +238,7 @@ function targetSummary(file: BookDockFile): string {
           type="checkbox"
           :checked="isSelected(file.id)"
           class="size-3.5 rounded border-input accent-primary shrink-0 self-center"
-          @click.stop
-          @change.stop="$emit('select', file.id)"
+          @click.stop="onCheckboxClick($event, file.id)"
         />
 
         <HoverCardRoot :open-delay="250" :close-delay="100">

client/src/features/book-dock/composables/useBookDockFiles.ts

@@ -23,6 +23,7 @@ export function useBookDockFiles() {
   const selectedIds = ref<Set<number>>(new Set())
   const selectAll = ref(false)
   const excludedIds = ref<Set<number>>(new Set())
+  const lastToggledId = ref<number | null>(null)
   let fetchReqSeq = 0
 
   const pageCount = computed(() => Math.ceil(total.value / filters.limit) || 1)
@@ -85,16 +86,37 @@ export function useBookDockFiles() {
     fetchFiles()
   }
 
-  function toggleSelect(id: number) {
+  function setSelected(id: number, selected: boolean) {
     if (selectAll.value) {
-      if (excludedIds.value.has(id)) excludedIds.value.delete(id)
+      if (selected) excludedIds.value.delete(id)
       else excludedIds.value.add(id)
     } else {
-      if (selectedIds.value.has(id)) selectedIds.value.delete(id)
-      else selectedIds.value.add(id)
+      if (selected) selectedIds.value.add(id)
+      else selectedIds.value.delete(id)
     }
   }
 
+  function toggleSelect(id: number, options: { range?: boolean } = {}) {
+    const willBeSelected = !isSelected(id)
+
+    if (options.range && lastToggledId.value !== null && lastToggledId.value !== id) {
+      const anchorIdx = items.value.findIndex((f) => f.id === lastToggledId.value)
+      const targetIdx = items.value.findIndex((f) => f.id === id)
+      if (anchorIdx !== -1 && targetIdx !== -1) {
+        const [start, end] = anchorIdx < targetIdx ? [anchorIdx, targetIdx] : [targetIdx, anchorIdx]
+        for (let i = start; i <= end; i++) {
+          const item = items.value[i]
+          if (item) setSelected(item.id, willBeSelected)
+        }
+        lastToggledId.value = id
+        return
+      }
+    }
+
+    setSelected(id, willBeSelected)
+    lastToggledId.value = id
+  }
+
   function toggleSelectAll() {
     if (selectAll.value) {
       selectAll.value = false
@@ -111,6 +133,7 @@ export function useBookDockFiles() {
     selectAll.value = false
     selectedIds.value.clear()
     excludedIds.value.clear()
+    lastToggledId.value = null
   }
 
   function isSelected(id: number): boolean {

client/src/views/BookDockView.vue

@@ -84,6 +84,10 @@ function openSheet(file: BookDockFile) {
   selectedFile.value = file
 }
 
+function handleSelect(id: number, shiftKey: boolean) {
+  toggleSelect(id, { range: shiftKey })
+}
+
 function closeSheet() {
   selectedFile.value = null
 }
@@ -469,7 +473,7 @@ onUnmounted(() => {
         :select-all="selectAll"
         :name-preview-by-file-id="namePreviewByFileId"
         :empty-message="emptyMessage"
-        @select="toggleSelect"
+        @select="handleSelect"
         @select-all="toggleSelectAll"
         @open="openSheet"
         @apply-fetched="handleInlineApplyFetched"