diff --git a/frontend/src/stores/seriesManage.js b/frontend/src/stores/seriesManage.js
index 3967b68..9f7e628 100644
--- a/frontend/src/stores/seriesManage.js
+++ b/frontend/src/stores/seriesManage.js
@@ -16,7 +16,10 @@ export const useSeriesManageStore = defineStore('seriesManage', () => {
 
   const tagId = ref(null)
   const series = ref(null)
-  const pages = ref([])              // [{image_id, page_number, thumbnail_url}]
+  const chapters = ref([])           // [{id, chapter_number, title, is_placeholder, stated_page_start/end, pages:[...]}]
+  const gaps = ref([])               // [{after_chapter_id, start, end}]
+  const pageCount = ref(0)
+  const targetChapterId = ref(null)  // which chapter the picker adds into
   const picker = ref([])             // gallery scroll results
   const pickerCursor = ref(null)
   const pickerSelection = ref([])    // image ids
@@ -28,7 +31,14 @@ export const useSeriesManageStore = defineStore('seriesManage', () => {
     try {
       const body = await api.get(`/api/series/${id}/pages`)
       series.value = body.series
-      pages.value = body.pages
+      chapters.value = body.chapters || []
+      gaps.value = body.gaps || []
+      pageCount.value = (body.pages || []).length
+      // Keep a valid add-target: the selected chapter, else the first one.
+      const ids = chapters.value.map(c => c.id)
+      if (!ids.includes(targetChapterId.value)) {
+        targetChapterId.value = ids.length ? ids[0] : null
+      }
     } finally {
       loading.value = false
     }
@@ -38,6 +48,68 @@ export const useSeriesManageStore = defineStore('seriesManage', () => {
     if (tagId.value != null) await load(tagId.value)
   }
 
+  function gapAfter(chapterId) {
+    return gaps.value.find(g => g.after_chapter_id === chapterId) || null
+  }
+
+  // ---- chapters ----
+  async function createChapter({ title = null, isPlaceholder = false } = {}) {
+    await api.post(`/api/series/${tagId.value}/chapters`, {
+      body: { title, is_placeholder: isPlaceholder }
+    })
+    await refresh()
+  }
+
+  async function renameChapter(chapterId, title) {
+    await api.patch(`/api/series/${tagId.value}/chapters/${chapterId}`, {
+      body: { title }
+    })
+    await refresh()
+  }
+
+  async function setChapterStated(chapterId, start, end) {
+    await api.patch(`/api/series/${tagId.value}/chapters/${chapterId}`, {
+      body: { stated_page_start: start, stated_page_end: end }
+    })
+    await refresh()
+  }
+
+  async function reorderChapters(orderedChapterIds) {
+    await api.post(`/api/series/${tagId.value}/chapters/reorder`, {
+      body: { chapter_ids: orderedChapterIds }
+    })
+    await refresh()
+  }
+
+  async function moveChapter(chapterId, dir) {
+    const ids = chapters.value.map(c => c.id)
+    const from = ids.indexOf(chapterId)
+    const to = from + dir
+    if (from === -1 || to < 0 || to >= ids.length) return
+    await reorderChapters(moveItem(ids, from, to))
+  }
+
+  async function deleteChapter(chapterId) {
+    await api.delete(`/api/series/${tagId.value}/chapters/${chapterId}`)
+    await refresh()
+  }
+
+  async function mergeChapter(sourceId, targetId) {
+    await api.post(`/api/series/${tagId.value}/chapters/${sourceId}/merge`, {
+      body: { target_chapter_id: targetId }
+    })
+    await refresh()
+    toast({ text: 'Chapters merged', type: 'success' })
+  }
+
+  async function reorderPages(chapterId, orderedImageIds) {
+    await api.post(`/api/series/${tagId.value}/chapters/${chapterId}/reorder`, {
+      body: { image_ids: orderedImageIds }
+    })
+    await refresh()
+  }
+
+  // ---- picker / pages ----
   async function loadPicker(reset = false) {
     if (reset) { picker.value = []; pickerCursor.value = null }
     const params = { limit: 50 }
@@ -55,12 +127,13 @@ export const useSeriesManageStore = defineStore('seriesManage', () => {
 
   async function addSelected() {
     if (pickerSelection.value.length === 0) return
+    if (targetChapterId.value == null) await createChapter()
     await api.post(`/api/series/${tagId.value}/pages`, {
-      body: { image_ids: pickerSelection.value }
+      body: { image_ids: pickerSelection.value, chapter_id: targetChapterId.value }
     })
     pickerSelection.value = []
     await refresh()
-    toast({ text: 'Added to series', type: 'success' })
+    toast({ text: 'Added to chapter', type: 'success' })
   }
 
   async function remove(imageId) {
@@ -70,13 +143,6 @@ export const useSeriesManageStore = defineStore('seriesManage', () => {
     await refresh()
   }
 
-  async function reorder(orderedImageIds) {
-    await api.post(`/api/series/${tagId.value}/reorder`, {
-      body: { image_ids: orderedImageIds }
-    })
-    await refresh()
-  }
-
   async function setCover(imageId) {
     await api.post(`/api/series/${tagId.value}/cover`, {
       body: { image_id: imageId }
@@ -85,8 +151,11 @@ export const useSeriesManageStore = defineStore('seriesManage', () => {
   }
 
   return {
-    tagId, series, pages, picker, pickerCursor, pickerSelection, loading,
-    load, refresh, loadPicker, togglePick, addSelected, remove,
-    reorder, setCover
+    tagId, series, chapters, gaps, pageCount, targetChapterId,
+    picker, pickerCursor, pickerSelection, loading,
+    load, refresh, gapAfter,
+    createChapter, renameChapter, setChapterStated, reorderChapters,
+    moveChapter, deleteChapter, mergeChapter, reorderPages,
+    loadPicker, togglePick, addSelected, remove, setCover
   }
 })
diff --git a/frontend/src/stores/seriesReader.js b/frontend/src/stores/seriesReader.js
index beac66d..86f2e98 100644
--- a/frontend/src/stores/seriesReader.js
+++ b/frontend/src/stores/seriesReader.js
@@ -42,7 +42,27 @@ export const useSeriesReaderStore = defineStore('seriesReader', () => {
     await run(async () => {
       const body = await api.get(`/api/series/${tagId}/pages`)
       series.value = body.series
-      pages.value = body.pages
+      // page_number is now WITHIN a chapter, so it can't anchor scroll/jump
+      // (two chapters both have a page 1). Decorate each page with a global
+      // `seq` (reading-order position) for anchors, plus chapter-divider info
+      // so the reader can mark where each chapter begins.
+      const chapters = body.chapters || []
+      const labelById = {}
+      for (const c of chapters) {
+        labelById[c.id] = c.title || `Chapter ${c.chapter_number}`
+      }
+      let prevChapter = null
+      pages.value = (body.pages || []).map((p, i) => {
+        const isChapterStart =
+          chapters.length > 1 && p.chapter_id !== prevChapter
+        prevChapter = p.chapter_id
+        return {
+          ...p,
+          seq: i + 1,
+          isChapterStart,
+          chapterLabel: labelById[p.chapter_id] || null
+        }
+      })
     })
   }
 
diff --git a/frontend/src/views/SeriesManageView.vue b/frontend/src/views/SeriesManageView.vue
index d12ddcc..52feba1 100644
--- a/frontend/src/views/SeriesManageView.vue
+++ b/frontend/src/views/SeriesManageView.vue
@@ -2,9 +2,11 @@
   <v-container fluid class="pt-2 pb-6">
     <div class="fc-series__head">
       <span class="fc-series__name">{{ store.series?.name || 'Series' }}</span>
-      <span class="fc-series__count">{{ store.pages.length }} page(s)</span>
+      <span class="fc-series__count">
+        {{ store.chapters.length }} chapter(s) · {{ store.pageCount }} page(s)
+      </span>
       <v-btn
-        v-if="store.pages.length > 0"
+        v-if="store.pageCount > 0"
         size="small" variant="tonal" color="accent"
         prepend-icon="mdi-book-open"
         class="fc-series__read"
@@ -13,28 +15,123 @@
     </div>
 
     <div class="fc-series__body">
-      <div class="fc-series__pages">
-        <div
-          v-for="(p, idx) in store.pages" :key="p.image_id"
-          class="fc-series__page" draggable="true"
-          @dragstart="dragFrom = idx"
-          @dragover.prevent
-          @drop="onDrop(idx)"
-        >
-          <span class="fc-series__pn">{{ p.page_number }}</span>
-          <img :src="p.thumbnail_url" alt="" loading="lazy" />
-          <div class="fc-series__pageactions">
-            <v-btn size="x-small" variant="text" icon="mdi-image-frame"
-                   title="Make cover" @click="store.setCover(p.image_id)" />
-            <v-btn size="x-small" variant="text" icon="mdi-close"
-                   title="Remove" @click="store.remove(p.image_id)" />
+      <!-- Chapters column -->
+      <div class="fc-series__chapters">
+        <template v-for="(ch, ci) in store.chapters" :key="ch.id">
+          <section
+            class="fc-chapter"
+            :class="{ 'fc-chapter--target': ch.id === store.targetChapterId }"
+          >
+            <header class="fc-chapter__head">
+              <span class="fc-chapter__num">{{ ch.chapter_number }}</span>
+              <v-text-field
+                v-model="titleDraft[ch.id]"
+                :placeholder="`Chapter ${ch.chapter_number}`"
+                density="compact" variant="plain" hide-details
+                class="fc-chapter__title"
+                @keydown.enter="commitTitle(ch)"
+                @blur="commitTitle(ch)"
+              />
+              <span v-if="ch.is_placeholder" class="fc-chapter__ph">placeholder</span>
+              <span v-else class="fc-chapter__pc">{{ ch.pages.length }} pg</span>
+
+              <div class="fc-chapter__stated">
+                <input
+                  class="fc-chapter__num-in" type="number" min="0"
+                  :value="ch.stated_page_start ?? ''" placeholder="–"
+                  title="Stated first page"
+                  @change="onStated(ch, 'start', $event)"
+                >
+                <span>–</span>
+                <input
+                  class="fc-chapter__num-in" type="number" min="0"
+                  :value="ch.stated_page_end ?? ''" placeholder="–"
+                  title="Stated last page"
+                  @change="onStated(ch, 'end', $event)"
+                >
+              </div>
+
+              <div class="fc-chapter__actions">
+                <v-btn
+                  size="x-small" variant="text" icon="mdi-chevron-up"
+                  title="Move chapter up" :disabled="ci === 0"
+                  @click="store.moveChapter(ch.id, -1)"
+                />
+                <v-btn
+                  size="x-small" variant="text" icon="mdi-chevron-down"
+                  title="Move chapter down"
+                  :disabled="ci === store.chapters.length - 1"
+                  @click="store.moveChapter(ch.id, 1)"
+                />
+                <v-btn
+                  size="x-small" variant="text" icon="mdi-arrow-collapse-up"
+                  title="Merge into previous chapter" :disabled="ci === 0"
+                  @click="store.mergeChapter(ch.id, store.chapters[ci - 1].id)"
+                />
+                <v-btn
+                  size="x-small" variant="text" icon="mdi-target"
+                  :color="ch.id === store.targetChapterId ? 'accent' : undefined"
+                  title="Add picked images here"
+                  @click="store.targetChapterId = ch.id"
+                />
+                <v-btn
+                  size="x-small" variant="text" icon="mdi-delete-outline"
+                  title="Delete chapter (removes its pages from the series)"
+                  @click="store.deleteChapter(ch.id)"
+                />
+              </div>
+            </header>
+
+            <div v-if="ch.is_placeholder" class="fc-chapter__reserved">
+              Reserved slot — a section you don't have yet.
+            </div>
+            <div v-else-if="ch.pages.length === 0" class="fc-chapter__empty">
+              No pages — pick this chapter (◎) then add from the right.
+            </div>
+            <div v-else class="fc-chapter__pages">
+              <div
+                v-for="(p, pi) in ch.pages" :key="p.image_id"
+                class="fc-page" draggable="true"
+                @dragstart="drag = { chapterId: ch.id, idx: pi }"
+                @dragover.prevent
+                @drop="onPageDrop(ch, pi)"
+              >
+                <span class="fc-page__pn">{{ p.page_number }}</span>
+                <img :src="p.thumbnail_url" alt="" loading="lazy" />
+                <div class="fc-page__actions">
+                  <v-btn size="x-small" variant="text" icon="mdi-image-frame"
+                         title="Make cover" @click="store.setCover(p.image_id)" />
+                  <v-btn size="x-small" variant="text" icon="mdi-close"
+                         title="Remove" @click="store.remove(p.image_id)" />
+                </div>
+              </div>
+            </div>
+          </section>
+
+          <div
+            v-if="store.gapAfter(ch.id)"
+            class="fc-gap"
+          >
+            <v-icon size="x-small">mdi-alert-outline</v-icon>
+            Gap: pages {{ store.gapAfter(ch.id).start }}–{{ store.gapAfter(ch.id).end }} missing
           </div>
+        </template>
+
+        <div v-if="store.chapters.length === 0" class="fc-series__empty">
+          No chapters yet — add one, then add images from the right.
         </div>
-        <div v-if="store.pages.length === 0" class="fc-series__empty">
-          No pages yet — add images from the right.
+
+        <div class="fc-series__chapter-add">
+          <v-btn size="small" variant="tonal" prepend-icon="mdi-plus"
+                 @click="store.createChapter()">Add chapter</v-btn>
+          <v-btn size="small" variant="text" prepend-icon="mdi-bookmark-outline"
+                 @click="store.createChapter({ isPlaceholder: true })">
+            Add placeholder
+          </v-btn>
         </div>
       </div>
 
+      <!-- Picker column -->
       <div class="fc-series__picker">
         <div class="fc-series__pickerhead">
           <span>{{ store.pickerSelection.length }} selected</span>
@@ -42,7 +139,7 @@
             size="small" color="accent" variant="flat"
             :disabled="store.pickerSelection.length === 0"
             @click="store.addSelected()"
-          >Add to series</v-btn>
+          >Add to {{ targetLabel }}</v-btn>
         </div>
         <div class="fc-series__pickergrid">
           <div
@@ -61,23 +158,52 @@
 </template>
 
 <script setup>
-import { onMounted, ref } from 'vue'
+import { computed, onMounted, reactive, ref, watch } from 'vue'
 import { useRoute } from 'vue-router'
 import { useSeriesManageStore, moveItem } from '../stores/seriesManage.js'
 import { useInfiniteScroll } from '../composables/useInfiniteScroll.js'
 
 const route = useRoute()
 const store = useSeriesManageStore()
-const dragFrom = ref(null)
 const sentinel = ref(null)
+const drag = ref(null)            // { chapterId, idx }
+const titleDraft = reactive({})   // chapterId -> draft string
 
-function onDrop(toIdx) {
-  if (dragFrom.value === null || dragFrom.value === toIdx) return
+// Keep local title drafts in sync with the loaded chapters. Edits commit on
+// blur/Enter, which refreshes and resets the draft to the saved value.
+watch(() => store.chapters, (chs) => {
+  Object.keys(titleDraft).forEach(k => delete titleDraft[k])
+  for (const c of chs) titleDraft[c.id] = c.title || ''
+}, { immediate: true })
+
+const targetLabel = computed(() => {
+  const ch = store.chapters.find(c => c.id === store.targetChapterId)
+  if (!ch) return 'chapter'
+  return ch.title || `Chapter ${ch.chapter_number}`
+})
+
+function commitTitle(ch) {
+  const v = (titleDraft[ch.id] || '').trim()
+  if (v === (ch.title || '')) return
+  store.renameChapter(ch.id, v || null)
+}
+
+function onStated(ch, which, ev) {
+  const raw = ev.target.value
+  const n = raw === '' ? null : parseInt(raw, 10)
+  const start = which === 'start' ? n : ch.stated_page_start
+  const end = which === 'end' ? n : ch.stated_page_end
+  store.setChapterStated(ch.id, start, end)
+}
+
+function onPageDrop(chapter, toIdx) {
+  if (!drag.value || drag.value.chapterId !== chapter.id) { drag.value = null; return }
+  if (drag.value.idx === toIdx) { drag.value = null; return }
   const ordered = moveItem(
-    store.pages.map(p => p.image_id), dragFrom.value, toIdx
+    chapter.pages.map(p => p.image_id), drag.value.idx, toIdx
   )
-  dragFrom.value = null
-  store.reorder(ordered)
+  drag.value = null
+  store.reorderPages(chapter.id, ordered)
 }
 
 useInfiniteScroll(sentinel, () => store.loadPicker())
@@ -92,33 +218,71 @@ onMounted(async () => {
 .fc-series__head {
   display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px;
 }
-.fc-series__name {
-  font-family: 'Fraunces', Georgia, serif; font-size: 22px;
-}
+.fc-series__name { font-family: 'Fraunces', Georgia, serif; font-size: 22px; }
 .fc-series__count {
   font-size: 13px; color: rgb(var(--v-theme-on-surface-variant));
 }
 .fc-series__body { display: flex; gap: 16px; align-items: flex-start; }
-.fc-series__pages { flex: 1; min-width: 0; display: flex;
-  flex-direction: column; gap: 6px; }
-.fc-series__page {
-  display: flex; align-items: center; gap: 10px; padding: 6px;
-  background: rgb(var(--v-theme-surface)); border-radius: 6px;
-  cursor: grab;
+.fc-series__chapters {
+  flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 10px;
 }
-.fc-series__page img {
-  width: 64px; height: 64px; object-fit: cover; border-radius: 4px;
+
+.fc-chapter {
+  border: 1px solid rgb(var(--v-theme-surface-light));
+  border-radius: 8px; padding: 8px 10px;
+  background: rgb(var(--v-theme-surface));
 }
-.fc-series__pn {
-  width: 28px; text-align: center;
+.fc-chapter--target { border-color: rgb(var(--v-theme-accent), 0.7); }
+.fc-chapter__head { display: flex; align-items: center; gap: 8px; }
+.fc-chapter__num {
+  flex: 0 0 auto; min-width: 22px; height: 22px; border-radius: 4px;
+  display: inline-flex; align-items: center; justify-content: center;
+  font-size: 12px; font-variant-numeric: tabular-nums;
+  background: rgb(var(--v-theme-accent), 0.16);
+  color: rgb(var(--v-theme-accent));
+}
+.fc-chapter__title { flex: 1; min-width: 0; }
+.fc-chapter__ph {
+  font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em;
   color: rgb(var(--v-theme-on-surface-variant));
+}
+.fc-chapter__pc {
+  font-size: 12px; color: rgb(var(--v-theme-on-surface-variant));
   font-variant-numeric: tabular-nums;
 }
-.fc-series__pageactions { margin-left: auto; }
-.fc-series__empty {
-  padding: 32px; text-align: center;
+.fc-chapter__stated { display: inline-flex; align-items: center; gap: 4px; }
+.fc-chapter__num-in {
+  width: 42px; text-align: center; font-size: 12px;
+  background: rgb(var(--v-theme-surface-light));
+  border: 1px solid transparent; border-radius: 4px; padding: 2px 4px;
+  color: rgb(var(--v-theme-on-surface));
+}
+.fc-chapter__num-in:focus { outline: none; border-color: rgb(var(--v-theme-accent)); }
+.fc-chapter__actions { flex: 0 0 auto; display: inline-flex; }
+.fc-chapter__reserved, .fc-chapter__empty {
+  padding: 14px; text-align: center; font-size: 13px;
   color: rgb(var(--v-theme-on-surface-variant));
 }
+.fc-chapter__pages { display: flex; flex-direction: column; gap: 6px; margin-top: 6px; }
+.fc-page {
+  display: flex; align-items: center; gap: 10px; padding: 6px;
+  background: rgb(var(--v-theme-surface-light)); border-radius: 6px; cursor: grab;
+}
+.fc-page img { width: 56px; height: 56px; object-fit: cover; border-radius: 4px; }
+.fc-page__pn {
+  width: 26px; text-align: center; font-variant-numeric: tabular-nums;
+  color: rgb(var(--v-theme-on-surface-variant));
+}
+.fc-page__actions { margin-left: auto; }
+.fc-gap {
+  display: flex; align-items: center; gap: 6px; padding: 4px 10px;
+  font-size: 12px; color: rgb(var(--v-theme-warning, var(--v-theme-accent)));
+}
+.fc-series__chapter-add { display: flex; gap: 8px; margin-top: 4px; }
+.fc-series__empty {
+  padding: 32px; text-align: center; color: rgb(var(--v-theme-on-surface-variant));
+}
+
 .fc-series__picker { flex: 1; min-width: 0; }
 .fc-series__pickerhead {
   display: flex; align-items: center; justify-content: space-between;
@@ -128,8 +292,10 @@ onMounted(async () => {
   display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
   gap: 6px;
 }
-.fc-series__pick { cursor: pointer; aspect-ratio: 1; overflow: hidden;
-  border-radius: 4px; outline: 2px solid transparent; }
+.fc-series__pick {
+  cursor: pointer; aspect-ratio: 1; overflow: hidden;
+  border-radius: 4px; outline: 2px solid transparent;
+}
 .fc-series__pick img { width: 100%; height: 100%; object-fit: cover; }
 .fc-series__pick.on { outline-color: rgb(var(--v-theme-accent)); }
 .fc-series__sentinel { height: 40px; }
diff --git a/frontend/src/views/SeriesReaderView.vue b/frontend/src/views/SeriesReaderView.vue
index 48c43cf..a00d1d0 100644
--- a/frontend/src/views/SeriesReaderView.vue
+++ b/frontend/src/views/SeriesReaderView.vue
@@ -20,9 +20,9 @@
           :value="currentPage" @change="jumpTo($event.target.value)"
         >
           <option
-            v-for="p in store.pages" :key="p.page_number"
-            :value="p.page_number"
-          >Page {{ p.page_number }}</option>
+            v-for="p in store.pages" :key="p.seq"
+            :value="p.seq"
+          >Page {{ p.seq }}</option>
         </select>
         <v-btn
           icon="mdi-menu" variant="text" size="small"
@@ -43,23 +43,27 @@
         <div
           v-for="p in store.pages" :key="p.image_id"
           class="fc-reader__thumb"
-          :class="{ active: p.page_number === currentPage }"
-          @click="jumpTo(p.page_number, true)"
+          :class="{ active: p.seq === currentPage }"
+          @click="jumpTo(p.seq, true)"
         >
           <img :src="p.thumbnail_url" alt="" loading="lazy" />
-          <span class="fc-reader__thumbnum">{{ p.page_number }}</span>
+          <span class="fc-reader__thumbnum">{{ p.seq }}</span>
         </div>
       </div>
     </aside>
 
     <div ref="scrollEl" class="fc-reader__content" @scroll="onScroll">
-      <div
-        v-for="p in store.pages" :key="p.image_id"
-        class="fc-reader__page" :id="'fc-page-' + p.page_number"
-        :data-page="p.page_number"
-      >
-        <img :src="p.image_url" :alt="'Page ' + p.page_number" loading="lazy" />
-      </div>
+      <template v-for="p in store.pages" :key="p.image_id">
+        <div v-if="p.isChapterStart" class="fc-reader__chdiv">
+          {{ p.chapterLabel }}
+        </div>
+        <div
+          class="fc-reader__page" :id="'fc-page-' + p.seq"
+          :data-page="p.seq"
+        >
+          <img :src="p.image_url" :alt="'Page ' + p.seq" loading="lazy" />
+        </div>
+      </template>
       <div v-if="store.error" class="fc-reader__empty">
         {{ store.error }}
         <v-btn variant="text" color="accent" @click="goBack">Back</v-btn>
@@ -115,9 +119,9 @@ function pageMetrics() {
   const root = scrollEl.value
   if (!root) return []
   return store.pages.map(p => {
-    const el = root.querySelector('#fc-page-' + p.page_number)
+    const el = root.querySelector('#fc-page-' + p.seq)
     return {
-      page_number: p.page_number,
+      page_number: p.seq,
       top: el ? el.offsetTop : 0,
       height: el ? el.offsetHeight : 0
     }
@@ -280,6 +284,13 @@ onUnmounted(() => {
   display: flex; flex-direction: column; align-items: center;
   gap: 2px; padding: 0.25rem;
 }
+.fc-reader__chdiv {
+  width: 100%; max-width: 1200px; margin: 0.5rem auto 0;
+  padding: 0.4rem 0.75rem;
+  font-family: 'Fraunces', Georgia, serif; font-size: 0.95rem;
+  color: rgb(var(--v-theme-on-surface-variant));
+  border-top: 1px solid rgb(var(--v-theme-surface-light));
+}
 .fc-reader__page { width: 100%; display: flex; justify-content: center; }
 .fc-reader__page img {
   max-width: min(100%, 1200px); height: auto; display: block;
diff --git a/frontend/test/seriesManage.spec.js b/frontend/test/seriesManage.spec.js
index a094741..dc185d5 100644
--- a/frontend/test/seriesManage.spec.js
+++ b/frontend/test/seriesManage.spec.js
@@ -13,6 +13,19 @@ function stubFetch(handler) {
   })
 }
 
+const SERIES_BODY = {
+  series: { id: 7, name: 'V' },
+  chapters: [
+    {
+      id: 1, chapter_number: 1, title: null, is_placeholder: false,
+      stated_page_start: null, stated_page_end: null,
+      pages: [{ image_id: 1, page_number: 1, thumbnail_url: 't' }]
+    }
+  ],
+  gaps: [],
+  pages: [{ image_id: 1, page_number: 1, thumbnail_url: 't' }]
+}
+
 describe('seriesManage', () => {
   beforeEach(() => setActivePinia(createPinia()))
   afterEach(() => vi.restoreAllMocks())
@@ -22,48 +35,61 @@ describe('seriesManage', () => {
     expect(moveItem([1, 2, 3], 0, 2)).toEqual([2, 3, 1])
   })
 
-  it('load fetches pages + series', async () => {
+  it('load fetches chapters + series and picks a default target', async () => {
     const s = useSeriesManageStore()
-    stubFetch(() => ({
-      status: 200,
-      body: { series: { id: 7, name: 'V' },
-              pages: [{ image_id: 1, page_number: 1, thumbnail_url: 't' }] }
-    }))
+    stubFetch(() => ({ status: 200, body: SERIES_BODY }))
     await s.load(7)
     expect(s.series).toEqual({ id: 7, name: 'V' })
-    expect(s.pages.map(p => p.image_id)).toEqual([1])
+    expect(s.chapters.map(c => c.id)).toEqual([1])
+    expect(s.pageCount).toBe(1)
+    expect(s.targetChapterId).toBe(1)
   })
 
-  it('reorder posts the full ordered id list', async () => {
+  it('reorderPages posts ordered ids to the chapter reorder route', async () => {
     const s = useSeriesManageStore()
     s.tagId = 7
-    s.pages = [{ image_id: 1 }, { image_id: 2 }, { image_id: 3 }]
     const calls = []
     stubFetch((url, init) => {
       calls.push({ url, body: init.body ? JSON.parse(init.body) : null })
       if (url.includes('/reorder')) return { status: 200, body: { ok: true } }
-      return { status: 200, body: { series: { id: 7, name: 'V' }, pages: [] } }
+      return { status: 200, body: SERIES_BODY }
     })
-    await s.reorder([3, 1, 2])
-    const r = calls.find(c => c.url.includes('/reorder'))
-    expect(r.url).toContain('/api/series/7/reorder')
-    expect(r.body).toEqual({ image_ids: [3, 1, 2] })
+    await s.reorderPages(3, [30, 10, 20])
+    const r = calls.find(c => c.url.includes('/chapters/3/reorder'))
+    expect(r.url).toContain('/api/series/7/chapters/3/reorder')
+    expect(r.body).toEqual({ image_ids: [30, 10, 20] })
   })
 
-  it('addSelected posts picker selection then reloads', async () => {
+  it('moveChapter reorders via the chapter id list', async () => {
     const s = useSeriesManageStore()
     s.tagId = 7
+    s.chapters = [{ id: 1 }, { id: 2 }, { id: 3 }]
+    const calls = []
+    stubFetch((url, init) => {
+      calls.push({ url, body: init.body ? JSON.parse(init.body) : null })
+      if (url.includes('/chapters/reorder')) return { status: 200, body: { ok: true } }
+      return { status: 200, body: SERIES_BODY }
+    })
+    await s.moveChapter(2, -1)
+    const r = calls.find(c => c.url.includes('/chapters/reorder'))
+    expect(r.body).toEqual({ chapter_ids: [2, 1, 3] })
+  })
+
+  it('addSelected posts selection + target chapter then clears', async () => {
+    const s = useSeriesManageStore()
+    s.tagId = 7
+    s.targetChapterId = 5
     s.pickerSelection = [9, 10]
     const calls = []
     stubFetch((url, init) => {
       calls.push({ url, body: init.body ? JSON.parse(init.body) : null })
-      if (url.includes('/pages') && init.method === 'POST')
+      if (url.endsWith('/pages') && init.method === 'POST')
         return { status: 200, body: { added_count: 2 } }
-      return { status: 200, body: { series: { id: 7, name: 'V' }, pages: [] } }
+      return { status: 200, body: SERIES_BODY }
     })
     await s.addSelected()
     const add = calls.find(c => c.url.endsWith('/api/series/7/pages'))
-    expect(add.body).toEqual({ image_ids: [9, 10] })
+    expect(add.body).toEqual({ image_ids: [9, 10], chapter_id: 5 })
     expect(s.pickerSelection).toEqual([])
   })
 })