Implement interactive consolidation conflict resolution with merge and rename options

client/components/app/Appbar.vue

@@ -273,16 +273,25 @@ export default {
     batchConsolidate() {
       const payload = {
         message: this.$getString('MessageConfirmConsolidate', [this.$getString('MessageItemsSelected', [this.numMediaItemsSelected]), 'Author - Title']),
-        callback: (confirmed) => {
+        checkboxLabel: 'Merge contents on conflict',
+        checkboxType: 'checkbox',
+        callback: (confirmed, merge) => {
           if (confirmed) {
             this.$store.commit('setProcessingBatch', true)
             this.$axios
               .$post('/api/items/batch/consolidate', {
-                libraryItemIds: this.selectedMediaItems.map((i) => i.id)
+                libraryItemIds: this.selectedMediaItems.map((i) => i.id),
+                merge
               })
               .then((data) => {
-                this.$toast.success(this.$strings.ToastBatchConsolidateSuccess)
-                if (this.numMediaItemsSelected === 1) {
+                if (data.success) {
+                  this.$toast.success(this.$strings.ToastBatchConsolidateSuccess)
+                } else {
+                  const numFailed = data.results.filter((r) => !r.success).length
+                  this.$toast.warning(`${numFailed} items failed to consolidate. They may already exist or have other errors.`)
+                }
+
+                if (this.numMediaItemsSelected === 1 && data.success) {
                   this.$router.push(`/item/${this.selectedMediaItems[0].id}`)
                 }
                 this.cancelSelectionMode()

client/components/cards/LazyBookCard.vue

@@ -830,7 +830,19 @@ export default {
               })
               .catch((error) => {
                 console.error('Failed to consolidate', error)
-                this.$toast.error(error.response?.data || this.$strings.ToastConsolidateFailed || 'Consolidate failed')
+                if (error.response?.status === 409) {
+                  const data = error.response.data
+                  const author = this.mediaMetadata.authorName?.split(',')[0]?.trim() || 'Unknown Author'
+                  const title = this.mediaMetadata.title || 'Unknown Title'
+                  this.$eventBus.$emit('show-consolidation-conflict', {
+                    item: this._libraryItem,
+                    path: data.path,
+                    folderName: this.$getConsolidatedFolderName(author, title),
+                    existingLibraryItemId: data.existingLibraryItemId
+                  })
+                } else {
+                  this.$toast.error(error.response?.data?.error || error.response?.data || this.$strings.ToastConsolidateFailed || 'Consolidate failed')
+                }
               })
               .finally(() => {
                 this.processing = false

client/components/modals/ConsolidationConflictModal.vue

@@ -0,0 +1,107 @@
+<template>
+  <modals-modal v-model="show" name="consolidation-conflict" :width="500" :processing="processing">
+    <div class="px-6 py-6 font-sans">
+      <div class="flex items-center mb-4">
+        <span class="material-symbols text-yellow-500 text-3xl mr-3 font-bold">warning</span>
+        <h2 class="text-xl font-semibold text-white">Consolidation Conflict</h2>
+      </div>
+
+      <div class="text-gray-200 mb-6 text-sm">
+        <p class="mb-2">The destination folder already exists:</p>
+        <div class="bg-black/30 p-3 rounded-md font-mono text-xs break-all border border-white/10 mb-4 text-gray-300">
+          {{ folderPath }}
+        </div>
+        <div v-if="existingLibraryItemId" class="flex items-center text-xs text-yellow-400/80 mb-4 bg-yellow-400/5 p-2 rounded-sm border border-yellow-400/10">
+          <span class="material-symbols text-sm mr-2">info</span>
+          Another library item is already at this location.
+        </div>
+        <p class="text-base text-white/90">How would you like to resolve this?</p>
+      </div>
+
+      <div class="space-y-3 mb-8">
+        <div class="bg-white/5 rounded-lg border border-white/5 p-1">
+          <label class="flex items-start p-3 cursor-pointer group hover:bg-white/5 rounded-md transition-colors duration-200" :class="{ 'bg-white/5 border-white/10': resolution === 'merge' }">
+            <input v-model="resolution" type="radio" value="merge" class="mt-1 mr-4 accent-yellow-500" />
+            <div class="flex-1">
+              <span class="text-white font-medium block mb-0.5 group-hover:text-yellow-400 transition-colors">Merge Contents</span>
+              <p class="text-xs text-gray-400 leading-relaxed">Move all files from this book into the existing folder. Files with identical names will be automatically renamed with a timestamp.</p>
+            </div>
+          </label>
+
+          <label class="flex items-start p-3 cursor-pointer group hover:bg-white/5 rounded-md transition-colors duration-200" :class="{ 'bg-white/5 border-white/10': resolution === 'rename' }">
+            <input v-model="resolution" type="radio" value="rename" class="mt-1 mr-4 accent-yellow-500" />
+            <div class="flex-1">
+              <span class="text-white font-medium block mb-0.5 group-hover:text-yellow-400 transition-colors">Rename Destination</span>
+              <p class="text-xs text-gray-400 leading-relaxed mb-3">Save this book to a different folder name instead.</p>
+              <div v-if="resolution === 'rename'" class="mt-2 pl-1">
+                <ui-text-input v-model="newName" class="w-full" placeholder="Enter new folder name" @keyup.enter="submit" />
+              </div>
+            </div>
+          </label>
+        </div>
+      </div>
+
+      <div class="flex justify-end space-x-3 pt-4 border-t border-white/10">
+        <ui-btn @click="show = false">Cancel</ui-btn>
+        <ui-btn color="success" class="px-6" :loading="processing" @click="submit">Confirm Resolution</ui-btn>
+      </div>
+    </div>
+  </modals-modal>
+</template>
+
+<script>
+export default {
+  props: {
+    value: Boolean,
+    item: {
+      type: Object,
+      default: () => ({})
+    },
+    folderPath: String,
+    folderName: String,
+    existingLibraryItemId: String,
+    processing: Boolean
+  },
+  data() {
+    return {
+      resolution: 'merge',
+      newName: ''
+    }
+  },
+  computed: {
+    show: {
+      get() {
+        return this.value
+      },
+      set(val) {
+        this.$emit('input', val)
+      }
+    }
+  },
+  watch: {
+    folderName(val) {
+      if (val) this.newName = val
+    },
+    show(val) {
+      if (val) {
+        this.resolution = 'merge'
+        this.newName = this.folderName || ''
+      }
+    }
+  },
+  methods: {
+    submit() {
+      if (this.resolution === 'rename' && !this.newName.trim()) {
+        this.$toast.error('New folder name is required')
+        return
+      }
+
+      const payload = {
+        merge: this.resolution === 'merge',
+        newName: this.resolution === 'rename' ? this.newName.trim() : null
+      }
+      this.$emit('confirm', payload)
+    }
+  }
+}
+</script>