2026-06-11 22:07:57 -04:00
20 changed files with 1410 additions and 1158 deletions
@@ -0,0 +1,175 @@
 """series chapters become cosmetic dividers; pages become one series-global run
 FC-6.x reframe (#789). A series is now ONE flat, series-global ordered run of
 pages; chapters stop owning pages and become labeled dividers anchored to the
 page that begins them.
 Migration (order matters — series_page.chapter_id cascades, so it must be
 dropped BEFORE any chapter row is deleted, or pages would cascade away):
  a. Renumber series_page.page_number to a series-global 1..N (ordered by the
     OLD (chapter_number, page_number)).
  b. Add series_chapter.anchor_page_id and populate it with each chapter's first
     page (lowest new page_number).
  c. Drop series_page.chapter_id (severs the cascade link).
  d. Prune chapters that shouldn't become dividers: empty/placeholder ones (no
     anchor) and the redundant unlabeled chapter that would sit at page 1.
  e. Reshape series_chapter into the divider: drop chapter_number,
     is_placeholder, stated_page_start/end; make anchor_page_id NOT NULL +
     UNIQUE + FK→series_page ON DELETE CASCADE.
 Revision ID: 0047
 Revises: 0046
 Create Date: 2026-06-11
 """
 from typing import Sequence, Union
 import sqlalchemy as sa
 from alembic import op
 revision: str = "0047"
 down_revision: Union[str, None] = "0046"
 branch_labels: Union[str, Sequence[str], None] = None
 depends_on: Union[str, Sequence[str], None] = None
 def upgrade() -> None:
    # a. series-global page numbering, preserving the old reading order.
    op.execute(
        """
        WITH ordered AS (
            SELECT sp.id,
                   ROW_NUMBER() OVER (
                       PARTITION BY sp.series_tag_id
                       ORDER BY sc.chapter_number, sp.page_number, sp.id
                   ) AS rn
            FROM series_page sp
            JOIN series_chapter sc ON sc.id = sp.chapter_id
        )
        UPDATE series_page sp
        SET page_number = ordered.rn
        FROM ordered
        WHERE sp.id = ordered.id
        """
    )
    # b. anchor each existing chapter at its first page (lowest new page_number).
    op.add_column(
        "series_chapter",
        sa.Column("anchor_page_id", sa.Integer(), nullable=True),
    )
    op.execute(
        """
        WITH firsts AS (
            SELECT DISTINCT ON (sp.chapter_id)
                   sp.chapter_id, sp.id AS page_id
            FROM series_page sp
            ORDER BY sp.chapter_id, sp.page_number, sp.id
        )
        UPDATE series_chapter sc
        SET anchor_page_id = firsts.page_id
        FROM firsts
        WHERE firsts.chapter_id = sc.id
        """
    )
    # c. sever the ownership link (drops the FK + index with the column) BEFORE
    #    pruning chapters, so deleting a chapter can't cascade-delete its pages.
    op.drop_column("series_page", "chapter_id")
    # d. prune chapters that don't become dividers: placeholders / empty ones
    #    (no anchor), and the unlabeled chapter that would land redundantly at
    #    page 1 (the series just starts — no divider needed there).
    op.execute(
        """
        DELETE FROM series_chapter sc
        USING (
            SELECT sc2.id
            FROM series_chapter sc2
            LEFT JOIN series_page sp ON sp.id = sc2.anchor_page_id
            WHERE sc2.anchor_page_id IS NULL
               OR (sp.page_number = 1
                   AND sc2.title IS NULL
                   AND sc2.stated_part IS NULL)
        ) gone
        WHERE sc.id = gone.id
        """
    )
    # e. reshape into the divider model.
    op.drop_column("series_chapter", "chapter_number")
    op.drop_column("series_chapter", "is_placeholder")
    op.drop_column("series_chapter", "stated_page_start")
    op.drop_column("series_chapter", "stated_page_end")
    op.alter_column("series_chapter", "anchor_page_id", nullable=False)
    op.create_unique_constraint(
        "uq_series_chapter_anchor_page", "series_chapter", ["anchor_page_id"]
    )
    op.create_foreign_key(
        "fk_series_chapter_anchor_page",
        "series_chapter",
        "series_page",
        ["anchor_page_id"],
        ["id"],
        ondelete="CASCADE",
    )
 def downgrade() -> None:
    # Lossy: dividers can't be reconstructed as owning chapters. Collapse back to
    # exactly one chapter per series that owns all its pages in order.
    op.add_column(
        "series_page", sa.Column("chapter_id", sa.Integer(), nullable=True)
    )
    op.drop_constraint(
        "fk_series_chapter_anchor_page", "series_chapter", type_="foreignkey"
    )
    op.drop_constraint(
        "uq_series_chapter_anchor_page", "series_chapter", type_="unique"
    )
    op.drop_column("series_chapter", "anchor_page_id")
    op.add_column(
        "series_chapter",
        sa.Column(
            "chapter_number", sa.Integer(), nullable=False, server_default="1"
        ),
    )
    op.add_column(
        "series_chapter",
        sa.Column(
            "is_placeholder", sa.Boolean(), nullable=False,
            server_default="false",
        ),
    )
    op.add_column(
        "series_chapter",
        sa.Column("stated_page_start", sa.Integer(), nullable=True),
    )
    op.add_column(
        "series_chapter",
        sa.Column("stated_page_end", sa.Integer(), nullable=True),
    )
    op.execute("DELETE FROM series_chapter")
    op.execute(
        """
        INSERT INTO series_chapter (series_tag_id, chapter_number)
        SELECT DISTINCT series_tag_id, 1 FROM series_page
        """
    )
    op.execute(
        """
        UPDATE series_page sp
        SET chapter_id = sc.id
        FROM series_chapter sc
        WHERE sc.series_tag_id = sp.series_tag_id
        """
    )
    op.alter_column("series_page", "chapter_id", nullable=False)
    op.create_foreign_key(
        "fk_series_page_chapter",
        "series_page",
        "series_chapter",
        ["chapter_id"],
        ["id"],
        ondelete="CASCADE",
    )
@@ -0,0 +1,45 @@
 """series_page pending staging: status + nullable page_number (#789 Phase 2)
 Pages added from a post no longer append straight into the run — they land
 'pending' with a NULL page_number, staged grouped by their source post so the
 operator can drop junk (text-free alts, bumpers) and place the keepers into the
 sequence. A page only gets a series-global page_number once it's 'placed'.
 Revision ID: 0048
 Revises: 0047
 Create Date: 2026-06-11
 """
 from typing import Sequence, Union
 import sqlalchemy as sa
 from alembic import op
 revision: str = "0048"
 down_revision: Union[str, None] = "0047"
 branch_labels: Union[str, Sequence[str], None] = None
 depends_on: Union[str, Sequence[str], None] = None
 def upgrade() -> None:
    op.add_column(
        "series_page",
        sa.Column(
            "status", sa.String(length=16), nullable=False,
            server_default="placed",
        ),
    )
    op.alter_column(
        "series_page", "page_number",
        existing_type=sa.Integer(), nullable=True,
    )
 def downgrade() -> None:
    # Lossy: pending pages are unsorted staging rows with no order — drop them.
    op.execute("DELETE FROM series_page WHERE status = 'pending'")
    op.alter_column(
        "series_page", "page_number",
        existing_type=sa.Integer(), nullable=False,
    )
    op.drop_column("series_page", "status")
@@ -391,14 +391,9 @@ async def series_add(tag_id: int):
    ids, err = _parse_bulk_ids(body, max_ids=500)
    if err:
        return err
    chapter_id, cerr = _opt_int(body, "chapter_id")
    if cerr:
        return cerr
    async with get_session() as session:
        try:
-            n = await SeriesService(session).add_images(
+            n = await SeriesService(session).add_images(tag_id, ids)
                tag_id, ids, chapter_id=chapter_id
            )
        except SeriesError as exc:
            return _series_err(exc)
        await session.commit()
@@ -453,30 +448,30 @@ async def series_cover(tag_id: int):
    return jsonify({"ok": True})
-# ---- chapters (FC-6.1) ----------------------------------------------------
+# ---- chapter dividers (FC-6.x) -------------------------------------------
 # A chapter is a cosmetic divider anchored to the page that begins it; it owns
 # no pages. Page ordering is series-wide (the /reorder endpoint above), so there
 # is no per-chapter reorder/merge/chapter-reorder — those are gone.
@tags_bp.route("/series/<int:tag_id>/chapters", methods=["POST"])
 async def series_chapter_create(tag_id: int):
    body = await request.get_json() or {}
    anchor, aerr = _opt_int(body, "anchor_image_id")
    if aerr:
        return aerr
    if anchor is None:
        return jsonify({"error": "anchor_image_id required"}), 400
    title = body.get("title")
    if title is not None and not isinstance(title, str):
        return jsonify({"error": "title must be a string"}), 400
-    is_placeholder = bool(body.get("is_placeholder", False))
+    part, perr = _opt_int(body, "stated_part")
-    start, serr = _opt_int(body, "stated_page_start")
+    if perr:
-    if serr:
+        return perr
        return serr
    end, eerr = _opt_int(body, "stated_page_end")
    if eerr:
        return eerr
    async with get_session() as session:
        try:
-            ch = await SeriesService(session).create_chapter(
+            ch = await SeriesService(session).create_divider(
-                tag_id,
+                tag_id, anchor, title=title, stated_part=part,
                title=title,
                is_placeholder=is_placeholder,
                stated_page_start=start,
                stated_page_end=end,
            )
        except SeriesError as exc:
            return _series_err(exc)
@@ -484,21 +479,6 @@ async def series_chapter_create(tag_id: int):
    return jsonify(ch)
@tags_bp.route("/series/<int:tag_id>/chapters/reorder", methods=["POST"])
 async def series_chapter_reorder(tag_id: int):
    body = await request.get_json()
    ids, err = _parse_int_list(body, "chapter_ids")
    if err:
        return err
    async with get_session() as session:
        try:
            await SeriesService(session).reorder_chapters(tag_id, ids)
        except SeriesError as exc:
            return _series_err(exc)
        await session.commit()
    return jsonify({"ok": True})
@tags_bp.route(
    "/series/<int:tag_id>/chapters/<int:chapter_id>", methods=["PATCH"]
 )
@@ -514,19 +494,18 @@ async def series_chapter_update(tag_id: int, chapter_id: int):
        if perr:
            return perr
        kwargs.update(set_part=True, stated_part=part)
-    if "stated_page_start" in body:
+    if "anchor_image_id" in body:
-        start, serr = _opt_int(body, "stated_page_start")
+        anchor, aerr = _opt_int(body, "anchor_image_id")
-        if serr:
+        if aerr:
-            return serr
+            return aerr
-        kwargs.update(set_start=True, stated_page_start=start)
+        if anchor is None:
-    if "stated_page_end" in body:
+            return jsonify(
-        end, eerr = _opt_int(body, "stated_page_end")
+                {"error": "anchor_image_id must be an integer"}
-        if eerr:
+            ), 400
-            return eerr
+        kwargs.update(set_anchor=True, anchor_image_id=anchor)
        kwargs.update(set_end=True, stated_page_end=end)
    async with get_session() as session:
        try:
-            await SeriesService(session).update_chapter(
+            await SeriesService(session).update_divider(
                tag_id, chapter_id, **kwargs
            )
        except SeriesError as exc:
@@ -541,45 +520,7 @@ async def series_chapter_update(tag_id: int, chapter_id: int):
 async def series_chapter_delete(tag_id: int, chapter_id: int):
    async with get_session() as session:
        try:
-            await SeriesService(session).delete_chapter(tag_id, chapter_id)
+            await SeriesService(session).delete_divider(tag_id, chapter_id)
        except SeriesError as exc:
            return _series_err(exc)
        await session.commit()
    return jsonify({"ok": True})
@tags_bp.route(
    "/series/<int:tag_id>/chapters/<int:chapter_id>/merge", methods=["POST"]
 )
 async def series_chapter_merge(tag_id: int, chapter_id: int):
    body = await request.get_json()
    target, terr = _opt_int(body, "target_chapter_id")
    if terr:
        return terr
    if target is None:
        return jsonify({"error": "target_chapter_id required"}), 400
    async with get_session() as session:
        try:
            moved = await SeriesService(session).merge_chapter(
                tag_id, chapter_id, target
            )
        except SeriesError as exc:
            return _series_err(exc)
        await session.commit()
    return jsonify({"moved_count": moved})
@tags_bp.route(
    "/series/<int:tag_id>/chapters/<int:chapter_id>/reorder", methods=["POST"]
 )
 async def series_chapter_reorder_pages(tag_id: int, chapter_id: int):
    body = await request.get_json()
    ids, err = _parse_bulk_ids(body, max_ids=500)
    if err:
        return err
    async with get_session() as session:
        try:
            await SeriesService(session).reorder_pages(tag_id, chapter_id, ids)
        except SeriesError as exc:
            return _series_err(exc)
        await session.commit()
@@ -635,13 +576,35 @@ async def series_add_post(tag_id: int):
        return jsonify({"error": "post_id required"}), 400
    async with get_session() as session:
        try:
-            out = await SeriesService(session).add_post_as_chapter(tag_id, post_id)
+            out = await SeriesService(session).add_post(tag_id, post_id)
        except SeriesError as exc:
            return _series_err(exc)
        await session.commit()
    return jsonify(out)
@tags_bp.route("/series/<int:tag_id>/pending/place", methods=["POST"])
 async def series_place_pending(tag_id: int):
    """Move staged (pending) pages into the placed run — before `before_image_id`
    (a placed page) or appended when omitted (#789 P2)."""
    body = await request.get_json()
    ids, err = _parse_bulk_ids(body, max_ids=500)
    if err:
        return err
    before, berr = _opt_int(body, "before_image_id")
    if berr:
        return berr
    async with get_session() as session:
        try:
            n = await SeriesService(session).place_pending(
                tag_id, ids, before_image_id=before
            )
        except SeriesError as exc:
            return _series_err(exc)
        await session.commit()
    return jsonify({"placed_count": n})
 # ---- suggestion queue (FC-6.3) --------------------------------------------
@@ -1,28 +1,22 @@
-"""SeriesChapter — an ordered chapter/part within a series.
+"""SeriesChapter — a cosmetic chapter DIVIDER within a series (FC-6.x reframe).
-A series IS a Tag(kind='series'); a chapter groups ordered SeriesPages under it.
+A series is ONE flat, series-global ordered run of SeriesPages. A chapter is NOT
-Reading order is (chapter.chapter_number, series_page.page_number): chapter_number
+a container — it owns no pages. It is a labeled divider anchored to the page that
-sets the order of chapters, page_number orders pages within a chapter.
+BEGINS the chapter (anchor_page_id → series_page): "a new chapter starts here."
 A page's chapter is derived at read time as the nearest preceding divider.
-chapter_number is an ordering key only (not unique) — reorder rewrites 1..N
+Dividers never affect page ordering or the series-global page numbers; they stay
-wholesale, mirroring series_page.page_number, so a reorder can't transiently
+pinned to their anchor page across reorders. anchor_page_id is UNIQUE — at most
-collide on a unique index.
+one chapter begins at a given page — and FK-cascades, so removing the anchor page
 from the series drops the divider (the chapter merges into the preceding run).
-A chapter may be a placeholder (is_placeholder=True) — a reserved empty slot for
+title is the optional chapter name; stated_part is the optional operator-facing
-a section the operator doesn't have yet; it holds no pages and shows as a gap in
+"Part N" label (shown instead of a derived ordinal when set).
 the reader. stated_page_start/end carry the page range parsed from the source
 post (FC-6.2), used to flag missing-page gaps; both are nullable when unknown.
 stated_part is the operator-facing "Part N" label (FC-6.4), separate from the
 positional chapter_number: chapter_number is auto-managed ordering (rewritten
 1..N on reorder/delete), while stated_part is the real installment number the
 operator types — e.g. a series authored from a post that is Part 2 of a story.
 Nullable when unset (the UI then falls back to showing chapter_number).
 """
 from datetime import datetime
-from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, Text, func
+from sqlalchemy import DateTime, ForeignKey, Integer, Text, func
 from sqlalchemy.orm import Mapped, mapped_column
 from .base import Base
@@ -35,14 +29,13 @@ class SeriesChapter(Base):
    series_tag_id: Mapped[int] = mapped_column(
        ForeignKey("tag.id", ondelete="CASCADE"), nullable=False, index=True
    )
-    chapter_number: Mapped[int] = mapped_column(Integer, nullable=False)
+    anchor_page_id: Mapped[int] = mapped_column(
-    stated_part: Mapped[int | None] = mapped_column(Integer, nullable=True)
+        ForeignKey("series_page.id", ondelete="CASCADE"),
-    title: Mapped[str | None] = mapped_column(Text, nullable=True)
+        nullable=False,
-    is_placeholder: Mapped[bool] = mapped_column(
+        unique=True,
        Boolean, nullable=False, server_default="false"
    )
-    stated_page_start: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    title: Mapped[str | None] = mapped_column(Text, nullable=True)
-    stated_page_end: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    stated_part: Mapped[int | None] = mapped_column(Integer, nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )
@@ -1,17 +1,20 @@
 """SeriesPage — ordered image membership for a series-kind Tag.
-A series IS a Tag with kind='series'; series_page gives it ordered pages,
+A series IS a Tag with kind='series'; series_page gives it a SINGLE flat,
-grouped into chapters (FC-6). An image belongs to at most one series
+series-global ordered run of pages (FC-6.x divider reframe). An image belongs to
-(UNIQUE image_id) ⇒ at most one chapter. Reading order is
+at most one series (UNIQUE image_id). Reading order is `page_number` alone — a
-(chapter.chapter_number, series_page.page_number): page_number orders pages
+series-wide ordering key (not unique), rewritten 1..N wholesale on reorder so a
-WITHIN a chapter and is an ordering key only (not unique) — reorder rewrites
+reorder can't transiently collide on an index.
-1..N wholesale. stated_page carries the page number parsed from the source
+
-post (FC-6.2), nullable when unknown.
+Chapters are cosmetic DIVIDERS anchored to a page (see SeriesChapter); they do
 NOT own pages, so there is no chapter_id here — a page's chapter is derived at
 read time as the nearest preceding divider. stated_page carries the printed page
 number parsed from the source post, nullable when unknown.
 """
 from datetime import datetime
-from sqlalchemy import DateTime, ForeignKey, Integer, func
+from sqlalchemy import DateTime, ForeignKey, Integer, String, func
 from sqlalchemy.orm import Mapped, mapped_column
 from .base import Base
@@ -24,17 +27,17 @@ class SeriesPage(Base):
    series_tag_id: Mapped[int] = mapped_column(
        ForeignKey("tag.id", ondelete="CASCADE"), nullable=False, index=True
    )
    chapter_id: Mapped[int] = mapped_column(
        ForeignKey("series_chapter.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    image_id: Mapped[int] = mapped_column(
        ForeignKey("image_record.id", ondelete="CASCADE"),
        nullable=False,
        unique=True,
    )
-    page_number: Mapped[int] = mapped_column(Integer, nullable=False)
+    # 'placed' = in the series-global run (page_number set); 'pending' = staged
    # from a post awaiting the operator's sort (page_number NULL). (#789 P2)
    status: Mapped[str] = mapped_column(
        String(16), nullable=False, server_default="placed"
    )
    page_number: Mapped[int | None] = mapped_column(Integer, nullable=True)
    stated_page: Mapped[int | None] = mapped_column(Integer, nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
@@ -18,7 +18,6 @@ from sqlalchemy.dialects.postgresql import insert as pg_insert
 from sqlalchemy.ext.asyncio import AsyncSession
 from ..models import ImageRecord, Post, Tag, TagKind
 from ..models.series_chapter import SeriesChapter
 from ..models.series_page import SeriesPage
 from ..models.series_suggestion import SeriesSuggestion
 from ..models.tag import image_tag
@@ -144,9 +143,11 @@ class SeriesMatchService:
        return [t for t in rows if t]
    async def _series_max_stated_end(self, series_tag_id: int) -> int | None:
        # Highest printed page across the series' pages (FC-6.x: stated pages
        # live on series_page now; chapters are cosmetic dividers).
        return await self.session.scalar(
-            select(func.max(SeriesChapter.stated_page_end)).where(
+            select(func.max(SeriesPage.stated_page)).where(
-                SeriesChapter.series_tag_id == series_tag_id
+                SeriesPage.series_tag_id == series_tag_id
            )
        )
@@ -288,7 +289,7 @@ class SeriesMatchService:
            raise SeriesError(f"suggestion {suggestion_id} not found")
        if s.status != "pending":
            raise SeriesError(f"suggestion {suggestion_id} is already {s.status}")
-        out = await SeriesService(self.session).add_post_as_chapter(
+        out = await SeriesService(self.session).add_post(
            s.series_tag_id, s.post_id
        )
        s.status = "added"
@@ -518,21 +518,30 @@ class TagService:
        from ..models.series_chapter import SeriesChapter
        from ..models.series_page import SeriesPage
-        # Move the chapters first so the pages' chapter_id FK stays valid: a
+        # Move src's dividers onto tgt. Their anchor_page_id stays valid — the
-        # chapter left pointing at src would cascade-delete (with its pages) when
+        # anchored pages move too — and anchor is globally UNIQUE so no collision.
        # src is removed. chapter_number may now collide across the merged set —
        # acceptable (it's an ordering key, not unique).
        await self.session.execute(
            update(SeriesChapter)
            .where(SeriesChapter.series_tag_id == src)
            .values(series_tag_id=tgt)
        )
-        # image_id is UNIQUE across series_page and src != tgt, so an
+        # Append src's pages after tgt's so the merged series stays ONE clean
-        # image in src's series cannot already be in tgt's — no collision.
+        # series-global run (image_id is UNIQUE, so the two page sets are
        # disjoint). Offset src's page_number past tgt's current max.
        tgt_max = (
            await self.session.scalar(
                select(
                    func.coalesce(func.max(SeriesPage.page_number), 0)
                ).where(SeriesPage.series_tag_id == tgt)
            )
        ) or 0
        await self.session.execute(
            update(SeriesPage)
            .where(SeriesPage.series_tag_id == src)
-            .values(series_tag_id=tgt)
+            .values(
                series_tag_id=tgt,
                page_number=SeriesPage.page_number + tgt_max,
            )
        )
    async def _repoint_fandom_children(
@@ -28,7 +28,8 @@
        <v-card-title>Add to series</v-card-title>
        <v-card-text>
          <p class="text-caption mb-2">
-            Appends this post as the next chapter of the chosen series.
+            Adds this post's pages to the end of the chosen series, ready to drag
            into place.
          </p>
          <v-autocomplete
            v-model="picked"
@@ -122,7 +123,9 @@ async function onAddExisting() {
      body: { post_id: props.post.id }
    })
    pickerOpen.value = false
-    toast({ text: 'Added to series', type: 'success' })
+    toast({ text: 'Staged — sort the new pages into the series', type: 'success' })
    // Take the operator to the series so they can drop junk + place the pages.
    router.push({ name: 'series-manage', params: { tagId: picked.value } })
  } catch (e) {
    toast({ text: `Could not add to series: ${e.message}`, type: 'error' })
  } finally {
@@ -11,16 +11,18 @@ export function moveItem(arr, from, to) {
  return next
 }
 // FC-6.x: a series is ONE flat, series-global ordered run of pages, with
 // optional cosmetic chapter DIVIDERS anchored to the page that begins them.
 export const useSeriesManageStore = defineStore('seriesManage', () => {
  const api = useApi()
  const tagId = ref(null)
  const series = ref(null)
-  const chapters = ref([])           // [{id, chapter_number, stated_part, title, is_placeholder, stated_page_start/end, source_post, pages:[...]}]
+  const pages = ref([])              // flat, ordered: [{image_id, page_number, stated_page, thumbnail_url, image_url, source_post}]
-  const gaps = ref([])               // missing-page gaps: [{after_chapter_id, start, end}]
+  const dividers = ref([])           // [{id, anchor_image_id, page_number, title, stated_part}]
-  const partGaps = ref([])           // missing-Part gaps: [{after_chapter_id, start, end}]
+  const pending = ref([])            // staged-from-post: [{post:{id,title}|null, pages:[{image_id, stated_page, thumbnail_url, image_url}]}]
  const partGaps = ref([])           // [{after_divider_id, start, end}]
  const pageCount = ref(0)
  const targetChapterId = ref(null)  // which chapter the picker adds into
  const picker = ref([])             // gallery scroll results
  const pickerCursor = ref(null)
  const pickerSelection = ref([])    // image ids
@@ -32,15 +34,11 @@ export const useSeriesManageStore = defineStore('seriesManage', () => {
    try {
      const body = await api.get(`/api/series/${id}/pages`)
      series.value = body.series
-      chapters.value = body.chapters || []
+      pages.value = body.pages || []
-      gaps.value = body.gaps || []
+      dividers.value = body.dividers || []
      pending.value = body.pending || []
      partGaps.value = body.part_gaps || []
-      pageCount.value = (body.pages || []).length
+      pageCount.value = pages.value.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
    }
@@ -50,79 +48,75 @@ export const useSeriesManageStore = defineStore('seriesManage', () => {
    if (tagId.value != null) await load(tagId.value)
  }
-  function gapAfter(chapterId) {
+  // The divider anchored at a given page (shown as a chapter bar before it).
-    return gaps.value.find(g => g.after_chapter_id === chapterId) || null
+  function dividerAt(imageId) {
    return dividers.value.find(d => d.anchor_image_id === imageId) || null
  }
-  function partGapAfter(chapterId) {
+  function partGapAfter(dividerId) {
-    return partGaps.value.find(g => g.after_chapter_id === chapterId) || null
+    return partGaps.value.find(g => g.after_divider_id === dividerId) || null
  }
-  // ---- chapters ----
+  // ---- pages (series-wide) ----
-  async function createChapter({ title = null, isPlaceholder = false } = {}) {
+  async function reorder(orderedImageIds) {
-    await api.post(`/api/series/${tagId.value}/chapters`, {
+    await api.post(`/api/series/${tagId.value}/reorder`, {
      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 setChapterPart(chapterId, part) {
    await api.patch(`/api/series/${tagId.value}/chapters/${chapterId}`, {
      body: { stated_part: part }
    })
    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/${chapterId}/reorder`, {
      body: { image_ids: orderedImageIds }
    })
    await refresh()
  }
-  // ---- picker / pages ----
+  async function remove(imageId) {
    await api.post(`/api/series/${tagId.value}/pages/remove`, {
      body: { image_ids: [imageId] }
    })
    await refresh()
  }
  async function setCover(imageId) {
    await api.post(`/api/series/${tagId.value}/cover`, {
      body: { image_id: imageId }
    })
    await refresh()
  }
  // ---- chapter dividers ----
  async function createDivider(anchorImageId, { title = null, statedPart = null } = {}) {
    await api.post(`/api/series/${tagId.value}/chapters`, {
      body: { anchor_image_id: anchorImageId, title, stated_part: statedPart }
    })
    await refresh()
  }
  async function renameDivider(dividerId, title) {
    await api.patch(`/api/series/${tagId.value}/chapters/${dividerId}`, {
      body: { title }
    })
    await refresh()
  }
  async function setDividerPart(dividerId, part) {
    await api.patch(`/api/series/${tagId.value}/chapters/${dividerId}`, {
      body: { stated_part: part }
    })
    await refresh()
  }
  async function deleteDivider(dividerId) {
    await api.delete(`/api/series/${tagId.value}/chapters/${dividerId}`)
    await refresh()
    toast({ text: 'Chapter divider removed', type: 'success' })
  }
  // ---- pending staging (add-from-post) ----
  async function placePending(imageIds, beforeImageId = null) {
    await api.post(`/api/series/${tagId.value}/pending/place`, {
      body: { image_ids: imageIds, before_image_id: beforeImageId }
    })
    await refresh()
    toast({ text: 'Pages placed into the series', type: 'success' })
  }
  // ---- picker / add pages ----
  async function loadPicker(reset = false) {
    if (reset) { picker.value = []; pickerCursor.value = null }
    const params = { limit: 50 }
@@ -140,35 +134,20 @@ export const useSeriesManageStore = defineStore('seriesManage', () => {
  async function addSelected() {
    if (pickerSelection.value.length === 0) return
    if (targetChapterId.value == null) await createChapter()
    await api.post(`/api/series/${tagId.value}/pages`, {
-      body: { image_ids: pickerSelection.value, chapter_id: targetChapterId.value }
+      body: { image_ids: pickerSelection.value }
    })
    pickerSelection.value = []
    await refresh()
-    toast({ text: 'Added to chapter', type: 'success' })
+    toast({ text: 'Added to series', type: 'success' })
  }
  async function remove(imageId) {
    await api.post(`/api/series/${tagId.value}/pages/remove`, {
      body: { image_ids: [imageId] }
    })
    await refresh()
  }
  async function setCover(imageId) {
    await api.post(`/api/series/${tagId.value}/cover`, {
      body: { image_id: imageId }
    })
    await refresh()
  }
  return {
-    tagId, series, chapters, gaps, partGaps, pageCount, targetChapterId,
+    tagId, series, pages, dividers, pending, partGaps, pageCount,
    picker, pickerCursor, pickerSelection, loading,
-    load, refresh, gapAfter, partGapAfter,
+    load, refresh, dividerAt, partGapAfter,
-    createChapter, renameChapter, setChapterPart, setChapterStated,
+    reorder, remove, setCover, placePending,
-    reorderChapters, moveChapter, deleteChapter, mergeChapter, reorderPages,
+    createDivider, renameDivider, setDividerPart, deleteDivider,
-    loadPicker, togglePick, addSelected, remove, setCover
+    loadPicker, togglePick, addSelected
  }
 })
@@ -42,27 +42,23 @@ export const useSeriesReaderStore = defineStore('seriesReader', () => {
    await run(async () => {
      const body = await api.get(`/api/series/${tagId}/pages`)
      series.value = body.series
-      // page_number is now WITHIN a chapter, so it can't anchor scroll/jump
+      // FC-6.x: page_number is already the series-global reading order, so it
-      // (two chapters both have a page 1). Decorate each page with a global
+      // anchors scroll/jump directly (seq = page_number). Chapters are cosmetic
-      // `seq` (reading-order position) for anchors, plus chapter-divider info
+      // dividers anchored to a page; mark the page each divider begins on so the
-      // so the reader can mark where each chapter begins.
+      // reader can render a chapter heading there.
-      const chapters = body.chapters || []
+      const dividers = body.dividers || []
-      const labelById = {}
+      const anchorIds = new Set(dividers.map(d => d.anchor_image_id))
-      for (const c of chapters) {
+      const labelByAnchor = {}
-        labelById[c.id] = c.title || `Chapter ${c.chapter_number}`
+      for (const d of dividers) {
        labelByAnchor[d.anchor_image_id] =
          d.title || (d.stated_part != null ? `Part ${d.stated_part}` : 'Chapter')
      }
-      let prevChapter = null
+      pages.value = (body.pages || []).map((p) => ({
-      pages.value = (body.pages || []).map((p, i) => {
+        ...p,
-        const isChapterStart =
+        seq: p.page_number,
-          chapters.length > 1 && p.chapter_id !== prevChapter
+        isChapterStart: anchorIds.has(p.image_id),
-        prevChapter = p.chapter_id
+        chapterLabel: labelByAnchor[p.image_id] || 'Chapter'
-        return {
+      }))
          ...p,
          seq: i + 1,
          isChapterStart,
          chapterLabel: labelById[p.chapter_id] || null
        }
      })
    })
  }
@@ -9,9 +9,13 @@
        @click="renameOpen = true"
      />
      <span class="fc-series__count">
-        {{ store.chapters.length }} part(s) · {{ store.pageCount }} page(s)
+        {{ store.dividers.length }} chapter(s) · {{ store.pageCount }} page(s)
      </span>
      <v-spacer />
      <v-btn
        size="small" variant="tonal" prepend-icon="mdi-image-plus"
        @click="pickerOpen = true"
      >Add pages</v-btn>
      <v-btn
        v-if="store.pageCount > 0"
        size="small" variant="tonal" color="accent"
@@ -21,161 +25,148 @@
    </div>
    <p class="fc-series__hint">
-      Each part is one installment — drag pages to set their order, and set the
+      One continuous series. <strong>Drag any page</strong> to set its order —
-      <strong>Part #</strong> to mark where it falls in the story. Use
+      the numbers are the page's place in the whole series. Use a page's
-      <strong>Add pages</strong> to pull images from the gallery into the part
+      <strong>⋮ → Start a chapter here</strong> to drop a labeled divider before
-      you're working on.
+      it. New pages from <strong>Add pages</strong> append to the end, ready to
      be dragged into place.
    </p>
-    <!-- Parts, full width -->
+    <!-- Pending tray: pages staged from a post, grouped by source post, for the
-    <div class="fc-parts">
+         operator to drop junk and place into the run. -->
-      <template v-for="(ch, ci) in store.chapters" :key="ch.id">
+    <div v-if="store.pending.length" class="fc-pending">
-        <section class="fc-part">
+      <div class="fc-pending__head">
-          <header class="fc-part__head">
+        <v-icon size="small">mdi-tray-arrow-down</v-icon>
-            <label class="fc-part__partfield" :title="'Part number for this installment'">
+        <span>Pending — sort into the series</span>
-              <span class="fc-part__partlabel">Part</span>
+      </div>
-              <input
+      <p class="fc-pending__hint">
-                class="fc-part__partnum" type="number" min="1"
+        New pages from a post land here. Drop the ones that don't belong
-                :value="partDraft[ch.id] ?? ''"
+        (text-free alternates, bumpers), then place the rest into the run.
-                :placeholder="String(ch.chapter_number)"
+      </p>
-                @input="partDraft[ch.id] = $event.target.value"
+      <section v-for="(grp, gi) in store.pending" :key="gi" class="fc-pgroup">
-                @keydown.enter.prevent="commitPart(ch)"
+        <header class="fc-pgroup__head">
-                @blur="commitPart(ch)"
+          <span class="fc-pgroup__title" :title="grp.post?.title">
-              >
+            <v-icon size="x-small">mdi-link-variant</v-icon>
-            </label>
+            {{ grp.post?.title || 'Unknown post' }}
-
+          </span>
-            <v-text-field
+          <span class="fc-pgroup__count">{{ grp.pages.length }} pending</span>
-              v-model="titleDraft[ch.id]"
+          <v-spacer />
-              :placeholder="`Untitled — Part ${ch.stated_part ?? ch.chapter_number}`"
+          <v-btn
-              density="compact" variant="plain" hide-details
+            size="small" variant="tonal" color="accent"
-              class="fc-part__title"
+            prepend-icon="mdi-playlist-plus"
-              @keydown.enter="commitTitle(ch)"
+            @click="store.placePending(grp.pages.map(p => p.image_id))"
-              @blur="commitTitle(ch)"
+          >Place all into series</v-btn>
-            />
+        </header>
-
+        <div class="fc-pgroup__pages">
-            <span
+          <div v-for="p in grp.pages" :key="p.image_id" class="fc-ppage">
-              v-if="ch.source_post?.title" class="fc-part__src"
+            <img :src="p.thumbnail_url" alt="" loading="lazy" />
-              :title="ch.source_post.title"
+            <div class="fc-ppage__actions">
-            >
+              <v-btn
-              <v-icon size="x-small">mdi-link-variant</v-icon>
+                size="x-small" variant="flat" icon="mdi-playlist-plus"
-              {{ ch.source_post.title }}
+                title="Place this page into the series"
-            </span>
+                @click="store.placePending([p.image_id])"
            <span v-if="ch.is_placeholder" class="fc-part__badge">placeholder</span>
            <span v-else class="fc-part__pc">{{ ch.pages.length }} pg</span>
            <v-spacer />
            <v-btn
              v-if="!ch.is_placeholder"
              size="small" variant="tonal" color="accent"
              prepend-icon="mdi-image-plus"
              @click="openPicker(ch.id)"
            >Add pages</v-btn>
            <KebabMenu size="small" label="Part actions">
              <v-list-item
                prepend-icon="mdi-chevron-up" title="Move up"
                :disabled="ci === 0"
                @click="store.moveChapter(ch.id, -1)"
              />
-              <v-list-item
+              <v-btn
-                prepend-icon="mdi-chevron-down" title="Move down"
+                size="x-small" variant="flat" icon="mdi-close"
-                :disabled="ci === store.chapters.length - 1"
+                title="Drop — doesn't belong in the series"
-                @click="store.moveChapter(ch.id, 1)"
+                @click="store.remove(p.image_id)"
              />
              <v-list-item
                prepend-icon="mdi-arrow-collapse-up" title="Merge into previous"
                :disabled="ci === 0"
                @click="store.mergeChapter(ch.id, store.chapters[ci - 1].id)"
              />
              <v-divider />
              <v-list-item
                prepend-icon="mdi-delete-outline" title="Delete part"
                base-color="error"
                @click="confirmDelete(ch)"
              />
            </KebabMenu>
          </header>
          <div class="fc-part__statedrow">
            <span class="fc-part__statedlabel">Printed pages</span>
            <input
              class="fc-part__statedin" type="number" min="0"
              :value="ch.stated_page_start ?? ''" placeholder="start"
              @change="onStated(ch, 'start', $event)"
            >
            <span class="fc-part__dash">–</span>
            <input
              class="fc-part__statedin" type="number" min="0"
              :value="ch.stated_page_end ?? ''" placeholder="end"
              @change="onStated(ch, 'end', $event)"
            >
            <span class="fc-part__statedhelp">
              optional — the page numbers printed in this installment
            </span>
          </div>
          <div v-if="ch.is_placeholder" class="fc-part__reserved">
            Reserved slot — a part you don't have yet.
          </div>
          <div v-else-if="ch.pages.length === 0" class="fc-part__empty">
            No pages yet.
            <v-btn
              size="small" variant="text" color="accent"
              prepend-icon="mdi-image-plus" @click="openPicker(ch.id)"
            >Add pages</v-btn>
          </div>
          <div v-else class="fc-part__pages">
            <div
              v-for="(p, pi) in ch.pages" :key="p.image_id"
              class="fc-page" draggable="true"
              :class="{ 'fc-page--dragging': drag && drag.chapterId === ch.id && drag.idx === pi }"
              @dragstart="drag = { chapterId: ch.id, idx: pi }"
              @dragend="drag = null"
              @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="flat" icon="mdi-image-frame"
                       title="Make series cover" @click="store.setCover(p.image_id)" />
                <v-btn size="x-small" variant="flat" icon="mdi-close"
                       title="Remove from series" @click="store.remove(p.image_id)" />
              </div>
            </div>
          </div>
        </section>
        <div v-if="store.partGapAfter(ch.id)" class="fc-gap">
          <v-icon size="x-small">mdi-alert-outline</v-icon>
          Missing
          <template v-if="store.partGapAfter(ch.id).start === store.partGapAfter(ch.id).end">
            Part {{ store.partGapAfter(ch.id).start }}
          </template>
          <template v-else>
            Parts {{ store.partGapAfter(ch.id).start }}–{{ store.partGapAfter(ch.id).end }}
          </template>
        </div>
-        <div v-if="store.gapAfter(ch.id)" class="fc-gap">
+      </section>
-          <v-icon size="x-small">mdi-alert-outline</v-icon>
+    </div>
-          Gap: printed pages {{ store.gapAfter(ch.id).start }}–{{ store.gapAfter(ch.id).end }} missing
+
    <!-- One continuous page run; chapter dividers render inline before their
         anchor page. -->
    <div v-if="store.pages.length" class="fc-run">
      <template v-for="(p, pi) in store.pages" :key="p.image_id">
        <!-- chapter divider bar, if one is anchored at this page -->
        <template v-if="store.dividerAt(p.image_id)">
          <div class="fc-divider">
            <v-icon size="small" class="fc-divider__icon">mdi-format-section</v-icon>
            <label class="fc-divider__partfield" title="Part number for this chapter">
              <span class="fc-divider__partlabel">Part</span>
              <input
                class="fc-divider__partnum" type="number" min="1"
                :value="partDraft[store.dividerAt(p.image_id).id] ?? ''"
                placeholder="—"
                @input="partDraft[store.dividerAt(p.image_id).id] = $event.target.value"
                @keydown.enter.prevent="commitPart(store.dividerAt(p.image_id))"
                @blur="commitPart(store.dividerAt(p.image_id))"
              >
            </label>
            <v-text-field
              :model-value="titleDraft[store.dividerAt(p.image_id).id]"
              placeholder="Untitled chapter"
              density="compact" variant="plain" hide-details
              class="fc-divider__title"
              @update:model-value="titleDraft[store.dividerAt(p.image_id).id] = $event"
              @keydown.enter="commitTitle(store.dividerAt(p.image_id))"
              @blur="commitTitle(store.dividerAt(p.image_id))"
            />
            <v-spacer />
            <v-btn
              size="x-small" variant="text" icon="mdi-close"
              title="Remove this chapter divider"
              @click="store.deleteDivider(store.dividerAt(p.image_id).id)"
            />
          </div>
          <div
            v-if="store.partGapAfter(store.dividerAt(p.image_id).id)"
            class="fc-gap"
          >
            <v-icon size="x-small">mdi-alert-outline</v-icon>
            Missing
            <template v-if="gapText(p.image_id).single">
              Part {{ gapText(p.image_id).start }}
            </template>
            <template v-else>
              Parts {{ gapText(p.image_id).start }}–{{ gapText(p.image_id).end }}
            </template>
          </div>
        </template>
        <!-- the page -->
        <div
          class="fc-page" draggable="true"
          :class="{ 'fc-page--dragging': drag === pi }"
          @dragstart="drag = pi"
          @dragend="drag = null"
          @dragover.prevent
          @drop="onDrop(pi)"
        >
          <span class="fc-page__pn">{{ p.page_number }}</span>
          <img :src="p.thumbnail_url" alt="" loading="lazy" />
          <span
            v-if="p.source_post?.title" class="fc-page__src"
            :title="`From: ${p.source_post.title}`"
          >
            <v-icon size="x-small">mdi-link-variant</v-icon>
            {{ p.source_post.title }}
          </span>
          <div class="fc-page__actions">
            <v-btn
              size="x-small" variant="flat" icon="mdi-image-frame"
              title="Make series cover" @click="store.setCover(p.image_id)"
            />
            <v-btn
              v-if="!store.dividerAt(p.image_id)"
              size="x-small" variant="flat" icon="mdi-format-section"
              title="Start a chapter here" @click="store.createDivider(p.image_id)"
            />
            <v-btn
              size="x-small" variant="flat" icon="mdi-close"
              title="Remove from series" @click="store.remove(p.image_id)"
            />
          </div>
        </div>
      </template>
    </div>
-      <div v-if="store.chapters.length === 0" class="fc-series__empty">
+    <div v-else class="fc-series__empty">
-        No parts yet — add one, then add pages from the gallery.
+      No pages yet — use <strong>Add pages</strong> to pull images from the
-      </div>
+      gallery into this series.
      <div class="fc-parts__add">
        <v-btn size="small" variant="tonal" prepend-icon="mdi-plus"
               @click="store.createChapter()">Add part</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 slide-over -->
@@ -189,19 +180,13 @@
          <v-btn size="x-small" variant="text" icon="mdi-close"
                 @click="pickerOpen = false" />
        </div>
        <v-select
          v-model="store.targetChapterId"
          :items="chapterItems" item-title="label" item-value="id"
          density="compact" variant="outlined" hide-details
          label="Add to part" class="mt-2"
        />
        <div class="fc-picker__bar">
          <span>{{ store.pickerSelection.length }} selected</span>
          <v-btn
            size="small" color="accent" variant="flat"
            :disabled="store.pickerSelection.length === 0"
            @click="store.addSelected()"
-          >Add to part</v-btn>
+          >Add to series</v-btn>
        </div>
      </div>
      <div class="fc-picker__grid">
@@ -232,19 +217,18 @@
 </template>
 <script setup>
-import { computed, onMounted, reactive, ref, watch } from 'vue'
+import { onMounted, reactive, ref, watch } from 'vue'
 import { useRoute } from 'vue-router'
 import { useSeriesManageStore, moveItem } from '../stores/seriesManage.js'
 import { useInfiniteScroll } from '../composables/useInfiniteScroll.js'
 import KebabMenu from '../components/common/KebabMenu.vue'
 import TagRenameDialog from '../components/modal/TagRenameDialog.vue'
 const route = useRoute()
 const store = useSeriesManageStore()
 const sentinel = ref(null)
-const drag = ref(null)            // { chapterId, idx }
+const drag = ref(null)            // index in the flat pages run being dragged
-const titleDraft = reactive({})   // chapterId -> draft title
+const titleDraft = reactive({})   // dividerId -> draft title
-const partDraft = reactive({})    // chapterId -> draft stated_part (string)
+const partDraft = reactive({})    // dividerId -> draft stated_part (string)
 const pickerOpen = ref(false)
 const renameOpen = ref(false)
@@ -255,73 +239,47 @@ function onRenamed(updated) {
  if (store.series && updated?.name) store.series.name = updated.name
 }
-// Keep local drafts in sync with loaded chapters. Edits commit on blur/Enter,
+// Keep local divider drafts in sync with loaded dividers; edits commit on
-// which refreshes and resets the draft to the saved value.
+// blur/Enter, which refreshes and resets the draft to the saved value.
-watch(() => store.chapters, (chs) => {
+watch(() => store.dividers, (divs) => {
  for (const k of Object.keys(titleDraft)) delete titleDraft[k]
  for (const k of Object.keys(partDraft)) delete partDraft[k]
-  for (const c of chs) {
+  for (const d of divs) {
-    titleDraft[c.id] = c.title || ''
+    titleDraft[d.id] = d.title || ''
-    partDraft[c.id] = c.stated_part == null ? '' : String(c.stated_part)
+    partDraft[d.id] = d.stated_part == null ? '' : String(d.stated_part)
  }
 }, { immediate: true })
-const chapterItems = computed(() =>
+function commitTitle(d) {
-  store.chapters.map(c => ({
+  const v = (titleDraft[d.id] || '').trim()
-    id: c.id,
+  if (v === (d.title || '')) return
-    label: `Part ${c.stated_part ?? c.chapter_number}` +
+  store.renameDivider(d.id, v || null)
      (c.title ? ` — ${c.title}` : '') +
      (c.is_placeholder ? ' (placeholder)' : ` · ${c.pages.length} pg`),
  }))
 )
 function commitTitle(ch) {
  const v = (titleDraft[ch.id] || '').trim()
  if (v === (ch.title || '')) return
  store.renameChapter(ch.id, v || null)
 }
-function commitPart(ch) {
+function commitPart(d) {
-  const raw = (partDraft[ch.id] ?? '').trim()
+  const raw = (partDraft[d.id] ?? '').trim()
  const next = raw === '' ? null : parseInt(raw, 10)
  if (raw !== '' && (Number.isNaN(next) || next < 1)) {
-    partDraft[ch.id] = ch.stated_part == null ? '' : String(ch.stated_part)
+    partDraft[d.id] = d.stated_part == null ? '' : String(d.stated_part)
    return
  }
-  if (next === (ch.stated_part ?? null)) return
+  if (next === (d.stated_part ?? null)) return
-  store.setChapterPart(ch.id, next)
+  store.setDividerPart(d.id, next)
 }
-function onStated(ch, which, ev) {
+function gapText(anchorImageId) {
-  const raw = ev.target.value
+  const d = store.dividerAt(anchorImageId)
-  const n = raw === '' ? null : parseInt(raw, 10)
+  const g = d ? store.partGapAfter(d.id) : null
-  const start = which === 'start' ? n : ch.stated_page_start
+  return { start: g?.start, end: g?.end, single: g && g.start === g.end }
  const end = which === 'end' ? n : ch.stated_page_end
  store.setChapterStated(ch.id, start, end)
 }
-function onPageDrop(chapter, toIdx) {
+function onDrop(toIdx) {
-  if (!drag.value || drag.value.chapterId !== chapter.id) { drag.value = null; return }
+  if (drag.value === null || drag.value === toIdx) { drag.value = null; return }
  if (drag.value.idx === toIdx) { drag.value = null; return }
  const ordered = moveItem(
-    chapter.pages.map(p => p.image_id), drag.value.idx, toIdx
+    store.pages.map(p => p.image_id), drag.value, toIdx
  )
  drag.value = null
-  store.reorderPages(chapter.id, ordered)
+  store.reorder(ordered)
 }
 function confirmDelete(ch) {
  const label = `Part ${ch.stated_part ?? ch.chapter_number}`
  const n = ch.pages.length
  const msg = n
    ? `Delete ${label} and remove its ${n} page(s) from the series?`
    : `Delete ${label}?`
  if (window.confirm(msg)) store.deleteChapter(ch.id)
 }
 function openPicker(chapterId) {
  store.targetChapterId = chapterId
  pickerOpen.value = true
 }
 useInfiniteScroll(sentinel, () => store.loadPicker())
@@ -342,76 +300,46 @@ onMounted(async () => {
 }
 .fc-series__hint {
  font-size: 13px; color: rgb(var(--v-theme-on-surface-variant));
-  margin-bottom: 18px; max-width: 760px;
+  margin-bottom: 18px; max-width: 820px;
 }
-/* Parts — full width, stacked */
+/* One continuous page run with inline divider bars. */
-.fc-parts { display: flex; flex-direction: column; gap: 14px; max-width: 1100px; }
+.fc-run {
-.fc-part {
+  display: grid; gap: 10px; max-width: 1100px;
-  border: 1px solid rgb(var(--v-theme-surface-light));
+  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  border-radius: 10px; padding: 12px 14px;
  background: rgb(var(--v-theme-surface));
 }
 .fc-part__head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
-.fc-part__partfield {
+.fc-divider {
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: 12px;
  margin-top: 6px; padding: 6px 12px;
  border-left: 3px solid rgb(var(--v-theme-accent));
  background: rgb(var(--v-theme-accent), 0.10);
  border-radius: 0 8px 8px 0;
 }
 .fc-divider__icon { color: rgb(var(--v-theme-accent)); }
 .fc-divider__partfield {
  display: inline-flex; align-items: center; gap: 6px;
-  background: rgb(var(--v-theme-accent), 0.12);
+  background: rgb(var(--v-theme-accent), 0.14);
  border: 1px solid rgb(var(--v-theme-accent), 0.35);
-  border-radius: 8px; padding: 4px 8px;
+  border-radius: 8px; padding: 2px 8px;
 }
-.fc-part__partlabel {
+.fc-divider__partlabel {
-  font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em;
+  font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em;
  color: rgb(var(--v-theme-accent));
 }
-.fc-part__partnum {
+.fc-divider__partnum {
-  width: 46px; text-align: center; font-size: 18px; font-weight: 600;
+  width: 42px; text-align: center; font-size: 16px; font-weight: 600;
  font-variant-numeric: tabular-nums;
  background: transparent; border: none; color: rgb(var(--v-theme-on-surface));
 }
-.fc-part__partnum:focus { outline: none; }
+.fc-divider__partnum:focus { outline: none; }
-.fc-part__partnum::placeholder { color: rgb(var(--v-theme-on-surface-variant)); opacity: 0.6; }
+.fc-divider__partnum::placeholder {
  color: rgb(var(--v-theme-on-surface-variant)); opacity: 0.6;
 }
 .fc-divider__title { flex: 1 1 200px; min-width: 120px; font-size: 15px; }
-.fc-part__title { flex: 1 1 180px; min-width: 120px; font-size: 15px; }
+/* Big page tiles */
 .fc-part__src {
  display: inline-flex; align-items: center; gap: 4px; max-width: 240px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-size: 12px; color: rgb(var(--v-theme-on-surface-variant));
 }
 .fc-part__badge {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em;
  color: rgb(var(--v-theme-on-surface-variant));
 }
 .fc-part__pc {
  font-size: 12px; color: rgb(var(--v-theme-on-surface-variant));
  font-variant-numeric: tabular-nums;
 }
 .fc-part__statedrow {
  display: flex; align-items: center; gap: 6px; margin: 8px 0 2px;
  font-size: 12px; color: rgb(var(--v-theme-on-surface-variant));
 }
 .fc-part__statedlabel { text-transform: uppercase; letter-spacing: 0.04em; font-size: 11px; }
 .fc-part__statedin {
  width: 56px; 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-part__statedin:focus { outline: none; border-color: rgb(var(--v-theme-accent)); }
 .fc-part__dash { opacity: 0.6; }
 .fc-part__statedhelp { font-size: 11px; opacity: 0.7; }
 .fc-part__reserved, .fc-part__empty {
  padding: 18px; text-align: center; font-size: 13px;
  color: rgb(var(--v-theme-on-surface-variant));
 }
 /* Big page grid */
 .fc-part__pages {
  display: grid; gap: 10px; margin-top: 10px;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
 }
 .fc-page {
  position: relative; border-radius: 8px; overflow: hidden; cursor: grab;
  background: rgb(var(--v-theme-surface-light));
@@ -429,6 +357,12 @@ onMounted(async () => {
  font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums;
  background: rgb(var(--v-theme-accent)); color: rgb(var(--v-theme-on-accent, 0 0 0));
 }
 .fc-page__src {
  position: absolute; bottom: 0; left: 0; right: 0; z-index: 2;
  display: flex; align-items: center; gap: 4px; padding: 3px 6px;
  font-size: 11px; color: #fff; background: rgba(0, 0, 0, 0.55);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
 }
 .fc-page__actions {
  position: absolute; top: 4px; right: 4px; z-index: 2;
  display: flex; gap: 2px; opacity: 0; transition: opacity 0.12s;
@@ -439,12 +373,64 @@ onMounted(async () => {
 }
 .fc-gap {
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: 6px; padding: 2px 10px;
  font-size: 12px; color: rgb(var(--v-theme-warning, var(--v-theme-accent)));
 }
 .fc-parts__add { display: flex; gap: 8px; margin-top: 4px; }
 .fc-series__empty {
  padding: 40px; text-align: center; color: rgb(var(--v-theme-on-surface-variant));
  max-width: 1100px;
 }
 /* Pending tray */
 .fc-pending {
  max-width: 1100px; margin-bottom: 18px;
  border: 1px solid rgb(var(--v-theme-accent), 0.4);
  border-radius: 10px; padding: 10px 14px;
  background: rgb(var(--v-theme-accent), 0.06);
 }
 .fc-pending__head {
  display: flex; align-items: center; gap: 8px;
  font-family: 'Fraunces', Georgia, serif; font-size: 16px;
  color: rgb(var(--v-theme-accent));
 }
 .fc-pending__hint {
  font-size: 12px; color: rgb(var(--v-theme-on-surface-variant));
  margin: 4px 0 10px;
 }
 .fc-pgroup { margin-bottom: 12px; }
 .fc-pgroup__head {
  display: flex; align-items: center; gap: 10px; margin-bottom: 6px;
 }
 .fc-pgroup__title {
  display: inline-flex; align-items: center; gap: 4px; max-width: 360px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-size: 13px; font-weight: 600;
 }
 .fc-pgroup__count {
  font-size: 12px; color: rgb(var(--v-theme-on-surface-variant));
 }
 .fc-pgroup__pages {
  display: grid; gap: 8px;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
 }
 .fc-ppage {
  position: relative; border-radius: 6px; overflow: hidden;
  background: rgb(var(--v-theme-surface-light));
  border: 1px dashed rgb(var(--v-theme-accent), 0.5);
 }
 .fc-ppage img {
  width: 100%; aspect-ratio: 3 / 4; object-fit: contain; display: block;
  background: rgb(var(--v-theme-background));
 }
 .fc-ppage__actions {
  position: absolute; top: 4px; right: 4px; display: flex; gap: 2px;
  opacity: 0; transition: opacity 0.12s;
 }
 .fc-ppage:hover .fc-ppage__actions,
 .fc-ppage:focus-within .fc-ppage__actions { opacity: 1; }
 .fc-ppage__actions :deep(.v-btn) {
  background: rgba(0, 0, 0, 0.55); color: #fff;
 }
 /* Picker slide-over */
@@ -13,17 +13,14 @@ function stubFetch(handler) {
  })
 }
 // FC-6.x: a flat page run + cosmetic chapter dividers.
 const SERIES_BODY = {
  series: { id: 7, name: 'V' },
-  chapters: [
+  pages: [{ image_id: 1, page_number: 1, thumbnail_url: 't', source_post: null }],
-    {
+  dividers: [
-      id: 1, chapter_number: 1, title: null, is_placeholder: false,
+    { id: 1, anchor_image_id: 1, page_number: 1, title: null, stated_part: null }
      stated_page_start: null, stated_page_end: null,
      pages: [{ image_id: 1, page_number: 1, thumbnail_url: 't' }]
    }
  ],
-  gaps: [],
+  part_gaps: []
  pages: [{ image_id: 1, page_number: 1, thumbnail_url: 't' }]
 }
 describe('seriesManage', () => {
@@ -35,17 +32,17 @@ describe('seriesManage', () => {
    expect(moveItem([1, 2, 3], 0, 2)).toEqual([2, 3, 1])
  })
-  it('load fetches chapters + series and picks a default target', async () => {
+  it('load fetches the flat pages + dividers + series', async () => {
    const s = useSeriesManageStore()
    stubFetch(() => ({ status: 200, body: SERIES_BODY }))
    await s.load(7)
    expect(s.series).toEqual({ id: 7, name: 'V' })
-    expect(s.chapters.map(c => c.id)).toEqual([1])
+    expect(s.pages.map(p => p.image_id)).toEqual([1])
    expect(s.dividers.map(d => d.id)).toEqual([1])
    expect(s.pageCount).toBe(1)
    expect(s.targetChapterId).toBe(1)
  })
-  it('reorderPages posts ordered ids to the chapter reorder route', async () => {
+  it('reorder posts ordered ids to the series reorder route', async () => {
    const s = useSeriesManageStore()
    s.tagId = 7
    const calls = []
@@ -54,28 +51,29 @@ describe('seriesManage', () => {
      if (url.includes('/reorder')) return { status: 200, body: { ok: true } }
      return { status: 200, body: SERIES_BODY }
    })
-    await s.reorderPages(3, [30, 10, 20])
+    await s.reorder([30, 10, 20])
-    const r = calls.find(c => c.url.includes('/chapters/3/reorder'))
+    const r = calls.find(c => c.url.includes('/reorder'))
-    expect(r.url).toContain('/api/series/7/chapters/3/reorder')
+    expect(r.url).toContain('/api/series/7/reorder')
    expect(r.body).toEqual({ image_ids: [30, 10, 20] })
  })
-  it('moveChapter reorders via the chapter id list', async () => {
+  it('createDivider posts the anchor image + labels', 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 })
+      calls.push({ url, method: init.method, body: init.body ? JSON.parse(init.body) : null })
-      if (url.includes('/chapters/reorder')) return { status: 200, body: { ok: true } }
+      if (init.method === 'POST' && url.endsWith('/chapters'))
        return { status: 200, body: { id: 2, anchor_image_id: 5 } }
      return { status: 200, body: SERIES_BODY }
    })
-    await s.moveChapter(2, -1)
+    await s.createDivider(5, { title: 'X', statedPart: 2 })
-    const r = calls.find(c => c.url.includes('/chapters/reorder'))
+    const c = calls.find(x => x.method === 'POST' && x.url.endsWith('/chapters'))
-    expect(r.body).toEqual({ chapter_ids: [2, 1, 3] })
+    expect(c.url).toContain('/api/series/7/chapters')
    expect(c.body).toEqual({ anchor_image_id: 5, title: 'X', stated_part: 2 })
  })
-  it('setChapterPart patches stated_part on the chapter', async () => {
+  it('setDividerPart patches stated_part on the divider', async () => {
    const s = useSeriesManageStore()
    s.tagId = 7
    const calls = []
@@ -84,7 +82,7 @@ describe('seriesManage', () => {
      if (init.method === 'PATCH') return { status: 200, body: { ok: true } }
      return { status: 200, body: SERIES_BODY }
    })
-    await s.setChapterPart(1, 2)
+    await s.setDividerPart(1, 2)
    const p = calls.find(c => c.method === 'PATCH')
    expect(p.url).toContain('/api/series/7/chapters/1')
    expect(p.body).toEqual({ stated_part: 2 })
@@ -94,18 +92,25 @@ describe('seriesManage', () => {
    const s = useSeriesManageStore()
    stubFetch(() => ({
      status: 200,
-      body: { ...SERIES_BODY, part_gaps: [{ after_chapter_id: 1, start: 2, end: 2 }] }
+      body: { ...SERIES_BODY, part_gaps: [{ after_divider_id: 1, start: 2, end: 2 }] }
    }))
    await s.load(7)
    expect(s.partGaps).toHaveLength(1)
-    expect(s.partGapAfter(1)).toEqual({ after_chapter_id: 1, start: 2, end: 2 })
+    expect(s.partGapAfter(1)).toEqual({ after_divider_id: 1, start: 2, end: 2 })
    expect(s.partGapAfter(99)).toBeNull()
  })
-  it('addSelected posts selection + target chapter then clears', async () => {
+  it('dividerAt finds a divider by its anchor image', async () => {
    const s = useSeriesManageStore()
    stubFetch(() => ({ status: 200, body: SERIES_BODY }))
    await s.load(7)
    expect(s.dividerAt(1)?.id).toBe(1)
    expect(s.dividerAt(99)).toBeNull()
  })
  it('addSelected posts the selection (no chapter) then clears', async () => {
    const s = useSeriesManageStore()
    s.tagId = 7
    s.targetChapterId = 5
    s.pickerSelection = [9, 10]
    const calls = []
    stubFetch((url, init) => {
@@ -116,7 +121,7 @@ describe('seriesManage', () => {
    })
    await s.addSelected()
    const add = calls.find(c => c.url.endsWith('/api/series/7/pages'))
-    expect(add.body).toEqual({ image_ids: [9, 10], chapter_id: 5 })
+    expect(add.body).toEqual({ image_ids: [9, 10] })
    expect(s.pickerSelection).toEqual([])
  })
 })
@@ -178,14 +178,21 @@ def test_find_unused_tags_excludes_fandom_referenced_by_character(db_sync):
    assert "NobodysFandom" in names      # genuinely orphaned → still swept
-def test_find_unused_tags_excludes_series_with_only_chapters(db_sync):
+def test_find_unused_tags_excludes_series_with_a_divider(db_sync):
-    # An all-placeholder series has chapters but no pages yet — not unused.
+    # A series with a chapter divider (which anchors to a page) is in use.
-    series = _make_tag(db_sync, name="EmptySeries", kind=TagKind.series)
+    a = _make_artist(db_sync)
-    db_sync.add(SeriesChapter(series_tag_id=series.id, chapter_number=1))
+    series = _make_tag(db_sync, name="DivSeries", kind=TagKind.series)
    img = _make_image(
        db_sync, artist=a, path="/tmp/fc_divser.jpg", sha256="e" * 64,
    )
    page = SeriesPage(series_tag_id=series.id, image_id=img.id, page_number=1)
    db_sync.add(page)
    db_sync.flush()
    db_sync.add(SeriesChapter(series_tag_id=series.id, anchor_page_id=page.id))
    db_sync.commit()
    names = [t.name for t in cleanup_service.find_unused_tags(db_sync)]
-    assert "EmptySeries" not in names
+    assert "DivSeries" not in names
 # --- unlink_image_files ---------------------------------------------
@@ -391,7 +398,12 @@ def test_prune_unused_tags_commit_spares_fandom_and_chaptered_series(
        image_record_id=img.id, tag_id=char.id,
    ))
    series = _make_tag(db_sync, name="EmptySeries", kind=TagKind.series)
-    db_sync.add(SeriesChapter(series_tag_id=series.id, chapter_number=1))
+    simg = _make_image(
        db_sync, artist=a, path=str(tmp_path / "s.jpg"), sha256="e" * 64,
    )
    db_sync.add(SeriesPage(
        series_tag_id=series.id, image_id=simg.id, page_number=1
    ))
    _make_tag(db_sync, name="GenuinelyUnused")
    db_sync.commit()
@@ -480,11 +492,8 @@ def test_reset_content_tagging_deletes_content_keeps_fandom_series(db_sync, tmp_
        {"image_record_id": img.id, "tag_id": c.id},
        {"image_record_id": img.id, "tag_id": s.id},  # series membership
    ]))
    ch = SeriesChapter(series_tag_id=s.id, chapter_number=1)
    db_sync.add(ch)
    db_sync.flush()
    db_sync.add(SeriesPage(
-        series_tag_id=s.id, chapter_id=ch.id, image_id=img.id, page_number=1
+        series_tag_id=s.id, image_id=img.id, page_number=1
    ))
    db_sync.commit()
@@ -1,4 +1,4 @@
-"""FC-6.1 — chapter layer over series_page."""
+"""FC-6.x — cosmetic chapter dividers over the flat series page run."""
 import pytest
 from sqlalchemy import func, select
@@ -30,155 +30,138 @@ async def _series(db, name):
    return (await TagService(db).find_or_create(name, TagKind.series)).id
-async def _chapter_numbers(db, sid):
+async def _order(db, sid):
    rows = (
        await db.execute(
            select(SeriesChapter.id, SeriesChapter.chapter_number)
            .where(SeriesChapter.series_tag_id == sid)
            .order_by(SeriesChapter.chapter_number)
        )
    ).all()
    return [(r.id, r.chapter_number) for r in rows]
 async def _page_order(db, chapter_id):
    rows = (
        await db.execute(
            select(SeriesPage.image_id)
-            .where(SeriesPage.chapter_id == chapter_id)
+            .where(SeriesPage.series_tag_id == sid)
            .order_by(SeriesPage.page_number)
        )
    ).scalars().all()
    return list(rows)
 async def _dividers(db, sid):
    """(anchor_image_id, title, stated_part) ordered by anchor page position."""
    rows = (
        await db.execute(
            select(
                SeriesChapter.id,
                SeriesPage.image_id,
                SeriesChapter.title,
                SeriesChapter.stated_part,
            )
            .join(SeriesPage, SeriesPage.id == SeriesChapter.anchor_page_id)
            .where(SeriesChapter.series_tag_id == sid)
            .order_by(SeriesPage.page_number)
        )
    ).all()
    return rows
@pytest.mark.asyncio
-async def test_add_images_creates_default_chapter(db):
+async def test_create_divider_anchors_before_a_page(db):
    svc = SeriesService(db)
    sid = await _series(db, "C1")
-    i1, i2 = await _img(db), await _img(db)
+    i1, i2, i3 = await _img(db), await _img(db), await _img(db)
-    await svc.add_images(sid, [i1, i2])
+    await svc.add_images(sid, [i1, i2, i3])
-    chapters = await _chapter_numbers(db, sid)
+    await svc.create_divider(sid, i2, title="Two", stated_part=2)
-    assert len(chapters) == 1
+    divs = await _dividers(db, sid)
-    assert chapters[0][1] == 1
+    assert len(divs) == 1
-    assert await _page_order(db, chapters[0][0]) == [i1, i2]
+    assert divs[0].image_id == i2
    assert divs[0].title == "Two"
    assert divs[0].stated_part == 2
@pytest.mark.asyncio
-async def test_create_and_target_specific_chapter(db):
+async def test_create_divider_rejects_image_not_in_series(db):
    svc = SeriesService(db)
    sid = await _series(db, "C2")
-    i1, i2 = await _img(db), await _img(db)
+    i1 = await _img(db)
-    await svc.add_images(sid, [i1])  # default chapter 1
+    await svc.add_images(sid, [i1])
-    ch2 = await svc.create_chapter(sid, title="Two")
+    with pytest.raises(SeriesError):
-    assert ch2["chapter_number"] == 2
+        await svc.create_divider(sid, 999999)
    await svc.add_images(sid, [i2], chapter_id=ch2["id"])
    assert await _page_order(db, ch2["id"]) == [i2]
    # i1 stayed in chapter 1.
    chapters = await _chapter_numbers(db, sid)
    assert len(chapters) == 2
@pytest.mark.asyncio
-async def test_reorder_chapters(db):
+async def test_one_divider_per_page(db):
    svc = SeriesService(db)
    sid = await _series(db, "C3")
-    c1 = (await svc.create_chapter(sid))["id"]
+    i1, i2 = await _img(db), await _img(db)
-    c2 = (await svc.create_chapter(sid))["id"]
+    await svc.add_images(sid, [i1, i2])
-    c3 = (await svc.create_chapter(sid))["id"]
+    await svc.create_divider(sid, i2)
    await svc.reorder_chapters(sid, [c3, c1, c2])
    assert await _chapter_numbers(db, sid) == [(c3, 1), (c1, 2), (c2, 3)]
    with pytest.raises(SeriesError):
-        await svc.reorder_chapters(sid, [c1, c2])
+        await svc.create_divider(sid, i2)
@pytest.mark.asyncio
-async def test_reorder_pages_within_chapter(db):
+async def test_update_divider_sets_part_title_and_moves_anchor(db):
    svc = SeriesService(db)
    sid = await _series(db, "C4")
    i1, i2, i3 = await _img(db), await _img(db), await _img(db)
    await svc.add_images(sid, [i1, i2, i3])
-    cid = (await _chapter_numbers(db, sid))[0][0]
+    d = await svc.create_divider(sid, i2)
-    await svc.reorder_pages(sid, cid, [i3, i1, i2])
+    await svc.update_divider(
-    assert await _page_order(db, cid) == [i3, i1, i2]
+        sid, d["id"], set_title=True, title="X", set_part=True, stated_part=3
    )
    await svc.update_divider(
        sid, d["id"], set_anchor=True, anchor_image_id=i3
    )
    divs = await _dividers(db, sid)
    assert divs[0].image_id == i3
    assert divs[0].title == "X"
    assert divs[0].stated_part == 3
@pytest.mark.asyncio
-async def test_legacy_reorder_rejects_multi_chapter(db):
+async def test_delete_divider_leaves_pages(db):
    svc = SeriesService(db)
    sid = await _series(db, "C5")
-    i1 = await _img(db)
+    i1, i2, i3 = await _img(db), await _img(db), await _img(db)
-    await svc.add_images(sid, [i1])
+    await svc.add_images(sid, [i1, i2, i3])
-    await svc.create_chapter(sid)  # now 2 chapters
+    d = await svc.create_divider(sid, i2)
-    with pytest.raises(SeriesError):
+    await svc.delete_divider(sid, d["id"])
-        await svc.reorder(sid, [i1])
+    assert await _order(db, sid) == [i1, i2, i3]
    assert len(await _dividers(db, sid)) == 0
@pytest.mark.asyncio
-async def test_merge_chapter_moves_pages_and_renumbers(db):
+async def test_removing_anchor_page_cascades_its_divider(db):
    svc = SeriesService(db)
    sid = await _series(db, "C6")
    i1, i2, i3 = await _img(db), await _img(db), await _img(db)
-    await svc.add_images(sid, [i1])  # chapter 1
+    await svc.add_images(sid, [i1, i2, i3])
-    c2 = (await svc.create_chapter(sid))["id"]
+    await svc.create_divider(sid, i2)
-    await svc.add_images(sid, [i2, i3], chapter_id=c2)
+    await svc.remove_images(sid, [i2])
-    c1 = (await _chapter_numbers(db, sid))[0][0]
+    # the divider anchored at i2 cascaded away; pages compacted to 1..N.
-    moved = await svc.merge_chapter(sid, c2, c1)
+    assert len(await _dividers(db, sid)) == 0
-    assert moved == 2
+    assert await _order(db, sid) == [i1, i3]
    assert await _page_order(db, c1) == [i1, i2, i3]
    # source chapter gone; remaining renumbered 1..N.
    assert await _chapter_numbers(db, sid) == [(c1, 1)]
@pytest.mark.asyncio
 async def test_delete_chapter_cascades_pages_and_renumbers(db):
    svc = SeriesService(db)
    sid = await _series(db, "C7")
    i1, i2 = await _img(db), await _img(db)
    await svc.add_images(sid, [i1])
    c2 = (await svc.create_chapter(sid))["id"]
    await svc.add_images(sid, [i2], chapter_id=c2)
    await svc.delete_chapter(sid, c2)
    assert [c for _, c in await _chapter_numbers(db, sid)] == [1]
    # i2's page cascaded away with its chapter.
    cnt = await db.scalar(
-        select(func.count()).select_from(SeriesPage)
+        select(func.count()).select_from(SeriesChapter)
-        .where(SeriesPage.image_id == i2)
+        .where(SeriesChapter.series_tag_id == sid)
    )
    assert cnt == 0
@pytest.mark.asyncio
-async def test_set_cover_brings_chapter_and_page_to_front(db):
+async def test_list_pages_returns_dividers_and_part_gaps(db):
    svc = SeriesService(db)
-    sid = await _series(db, "C8")
+    sid = await _series(db, "C7")
    i1, i2, i3 = await _img(db), await _img(db), await _img(db)
-    await svc.add_images(sid, [i1])  # chapter 1
+    await svc.add_images(sid, [i1, i2, i3])
-    c2 = (await svc.create_chapter(sid))["id"]
+    await svc.create_divider(sid, i1, stated_part=1)
-    await svc.add_images(sid, [i2, i3], chapter_id=c2)
+    await svc.create_divider(sid, i3, stated_part=3)
    await svc.set_cover(sid, i3)
    chapters = await _chapter_numbers(db, sid)
    assert chapters[0][0] == c2  # i3's chapter is now first
    assert (await _page_order(db, c2))[0] == i3  # i3 first in its chapter
@pytest.mark.asyncio
 async def test_list_pages_flags_gaps_from_stated_ranges(db):
    svc = SeriesService(db)
    sid = await _series(db, "C9")
    await svc.create_chapter(sid, stated_page_start=1, stated_page_end=4)
    await svc.create_chapter(sid, stated_page_start=9, stated_page_end=12)
    out = await svc.list_pages(sid)
-    assert len(out["chapters"]) == 2
+    assert len(out["dividers"]) == 2
-    assert len(out["gaps"]) == 1
+    assert len(out["part_gaps"]) == 1
-    assert out["gaps"][0]["start"] == 5
+    assert out["part_gaps"][0]["start"] == 2
-    assert out["gaps"][0]["end"] == 8
+    assert out["part_gaps"][0]["end"] == 2
@pytest.mark.asyncio
 async def test_add_with_stated_pages_records_them(db):
    svc = SeriesService(db)
-    sid = await _series(db, "C10")
+    sid = await _series(db, "C8")
    i1, i2 = await _img(db), await _img(db)
    await svc.add_images(sid, [i1, i2], stated_pages={i1: 9, i2: 10})
    rows = dict(
@@ -1,9 +1,11 @@
-"""FC-6.2 — promote a post to a series + add a post as a chapter + browse list."""
+"""FC-6.x — promote a post to a series + add a post's pages + browse list."""
 import pytest
 from sqlalchemy import select
 from backend.app.models import Artist, ImageRecord, Post, TagKind
-from backend.app.services.series_service import SeriesService
+from backend.app.models.series_page import SeriesPage
 from backend.app.services.series_service import SeriesError, SeriesService
 from backend.app.services.tag_service import TagService
 pytestmark = pytest.mark.integration
@@ -53,12 +55,10 @@ async def test_promote_post_to_series(db):
    assert out["name"] == "My Comic pages 1-3"
    data = await svc.list_pages(out["series_tag_id"])
-    assert len(data["chapters"]) == 1
+    # one flat run in capture order, no dividers, stated pages parsed 1..3
-    ch = data["chapters"][0]
+    assert [p["image_id"] for p in data["pages"]] == imgs
-    assert ch["stated_page_start"] == 1
+    assert [p["stated_page"] for p in data["pages"]] == [1, 2, 3]
-    assert ch["stated_page_end"] == 3
+    assert data["dividers"] == []
    assert [p["image_id"] for p in ch["pages"]] == imgs  # capture order
    assert [p["stated_page"] for p in ch["pages"]] == [1, 2, 3]
@pytest.mark.asyncio
@@ -66,31 +66,34 @@ async def test_promote_requires_images(db):
    svc = SeriesService(db)
    artist = await _artist(db, "Empty Artist")
    post = await _post(db, artist, "No images", "pp2")
    from backend.app.services.series_service import SeriesError
    with pytest.raises(SeriesError):
        await svc.promote_post_to_series(post.id)
@pytest.mark.asyncio
-async def test_add_post_as_chapter_slots_by_stated_page(db):
+async def test_add_post_stages_pending(db):
    svc = SeriesService(db)
    artist = await _artist(db, "Story Artist")
    sid = (await TagService(db).find_or_create("Story", TagKind.series)).id
-    # An existing chapter stating pages 9-12.
+    # Seed the series with two PLACED pages.
-    await svc.create_chapter(sid, stated_page_start=9, stated_page_end=12)
+    seed_post = await _post(db, artist, "seed", "pp3a")
-    # A post stating pages 1-4 should slot BEFORE the 9-12 chapter.
+    seed = await _post_images(db, seed_post, artist, 2)
-    post = await _post(db, artist, "Story pages 1-4", "pp3")
+    await svc.add_images(sid, seed)
-    await _post_images(db, post, artist, 4)
+    # A later post is STAGED as pending — not in the placed run yet.
-    out = await svc.add_post_as_chapter(sid, post.id)
+    post = await _post(db, artist, "Story pages 9-11", "pp3b")
-    assert out["added"] == 4
+    imgs = await _post_images(db, post, artist, 3)
    out = await svc.add_post(sid, post.id)
    assert out["staged"] == 3
    data = await svc.list_pages(sid)
-    chapters = data["chapters"]
+    # placed run unchanged (just the seed); pending grouped under the post.
-    assert chapters[0]["stated_page_start"] == 1   # new one is first
+    assert [p["image_id"] for p in data["pages"]] == seed
-    assert chapters[1]["stated_page_start"] == 9
+    assert len(data["pending"]) == 1
-    # gap 5-8 flagged between them
+    grp = data["pending"][0]
-    assert data["gaps"][0]["start"] == 5
+    assert grp["post"]["id"] == post.id
-    assert data["gaps"][0]["end"] == 8
+    assert grp["post"]["title"] == "Story pages 9-11"
    assert [pg["image_id"] for pg in grp["pages"]] == imgs
    assert [pg["stated_page"] for pg in grp["pages"]] == [9, 10, 11]
@pytest.mark.asyncio
@@ -104,61 +107,32 @@ async def test_list_series_cards(db):
    rows = await svc.list_series()
    card = next(r for r in rows if r["id"] == out["series_tag_id"])
    assert card["name"] == "Card Comic pages 1-2"
-    assert card["chapter_count"] == 1
+    assert card["chapter_count"] == 0  # a flat promote has no dividers
    assert card["page_count"] == 2
    assert card["artist_name"] == "Card Artist"
    assert card["cover_thumbnail_url"]
    assert card["has_gap"] is False
    # artist filter keeps it; a different artist id drops it.
-    assert any(r["id"] == out["series_tag_id"] for r in await svc.list_series(artist_id=artist.id))
+    assert any(
-    assert all(r["id"] != out["series_tag_id"] for r in await svc.list_series(artist_id=artist.id + 99999))
+        r["id"] == out["series_tag_id"]
-
+        for r in await svc.list_series(artist_id=artist.id)
-
+    )
-# --- FC-6.4: stated_part, part_gaps, source_post label ---------------------
+    assert all(
        r["id"] != out["series_tag_id"]
        for r in await svc.list_series(artist_id=artist.id + 99999)
    )
@pytest.mark.asyncio
-async def test_update_chapter_sets_and_clears_stated_part(db):
+async def test_source_post_label_is_per_page(db):
    svc = SeriesService(db)
    sid = (await TagService(db).find_or_create("Part Series", TagKind.series)).id
    ch = await svc.create_chapter(sid)
    # Set the installment to Part 2 (chapter_number stays its positional value).
    await svc.update_chapter(sid, ch["id"], stated_part=2, set_part=True)
    data = await svc.list_pages(sid)
    assert data["chapters"][0]["stated_part"] == 2
    assert data["chapters"][0]["chapter_number"] == 1
    # Clearing it writes NULL back.
    await svc.update_chapter(sid, ch["id"], stated_part=None, set_part=True)
    data = await svc.list_pages(sid)
    assert data["chapters"][0]["stated_part"] is None
@pytest.mark.asyncio
 async def test_part_gaps_flagged_from_stated_part(db):
    svc = SeriesService(db)
    sid = (await TagService(db).find_or_create("Gappy Series", TagKind.series)).id
    c1 = await svc.create_chapter(sid)
    c3 = await svc.create_chapter(sid)
    await svc.update_chapter(sid, c1["id"], stated_part=1, set_part=True)
    await svc.update_chapter(sid, c3["id"], stated_part=3, set_part=True)
    data = await svc.list_pages(sid)
    assert len(data["part_gaps"]) == 1
    gap = data["part_gaps"][0]
    assert gap["after_chapter_id"] == c1["id"]
    assert gap["start"] == 2
    assert gap["end"] == 2
@pytest.mark.asyncio
 async def test_source_post_label_when_pages_share_one_post(db):
    svc = SeriesService(db)
    artist = await _artist(db, "Src Artist")
    post = await _post(db, artist, "Source Comic pages 1-2", "pp5")
    await _post_images(db, post, artist, 2)
    out = await svc.promote_post_to_series(post.id)
    data = await svc.list_pages(out["series_tag_id"])
-    sp = data["chapters"][0]["source_post"]
+    sp = data["pages"][0]["source_post"]
    assert sp is not None
    assert sp["id"] == post.id
    assert sp["title"] == "Source Comic pages 1-2"
@@ -79,7 +79,7 @@ async def test_match_is_idempotent_under_unique(db):
@pytest.mark.asyncio
-async def test_accept_adds_chapter_and_marks_added(db):
+async def test_accept_appends_pages_and_marks_added(db):
    artist = await _artist(db, "Accept Artist")
    a = await _post_with_images(db, artist, "Saga pages 1-4", "a", 3)
    sid = await _series_from(db, a)
@@ -90,7 +90,10 @@ async def test_accept_adds_chapter_and_marks_added(db):
    await svc.accept(sug["id"])
    data = await SeriesService(db).list_pages(sid)
-    assert len(data["chapters"]) == 2          # b became a 2nd chapter
+    # b's pages are STAGED pending (3 from a placed + 3 from b pending),
    # awaiting the operator's sort.
    assert len(data["pages"]) == 3
    assert sum(len(g["pages"]) for g in data["pending"]) == 3
    status = await db.scalar(
        select(SeriesSuggestion.status).where(SeriesSuggestion.id == sug["id"])
    )
@@ -25,20 +25,10 @@ async def _img(db):
@pytest.mark.asyncio
 async def _chapter(db, series_tag_id):
    ch = SeriesChapter(series_tag_id=series_tag_id, chapter_number=1)
    db.add(ch)
    await db.flush()
    return ch.id
 async def test_series_page_roundtrip_and_unique_image(db):
    s = await TagService(db).find_or_create("Vol1", TagKind.series)
    i1 = await _img(db)
-    ch = await _chapter(db, s.id)
+    db.add(SeriesPage(series_tag_id=s.id, image_id=i1, page_number=1))
    db.add(SeriesPage(
        series_tag_id=s.id, chapter_id=ch, image_id=i1, page_number=1
    ))
    await db.flush()
    got = await db.scalar(
        select(SeriesPage.page_number).where(SeriesPage.image_id == i1)
@@ -46,9 +36,21 @@ async def test_series_page_roundtrip_and_unique_image(db):
    assert got == 1
    # UNIQUE image_id: same image can't be a page twice (any series).
    s2 = await TagService(db).find_or_create("Vol2", TagKind.series)
-    ch2 = await _chapter(db, s2.id)
+    db.add(SeriesPage(series_tag_id=s2.id, image_id=i1, page_number=1))
-    db.add(SeriesPage(
+    with pytest.raises(IntegrityError):
-        series_tag_id=s2.id, chapter_id=ch2, image_id=i1, page_number=1
+        await db.flush()
-    ))
+
@pytest.mark.asyncio
 async def test_chapter_divider_anchor_is_unique(db):
    # A chapter divider anchors to the page that begins it; one divider per page.
    s = await TagService(db).find_or_create("Vol3", TagKind.series)
    i1 = await _img(db)
    p = SeriesPage(series_tag_id=s.id, image_id=i1, page_number=1)
    db.add(p)
    await db.flush()
    db.add(SeriesChapter(series_tag_id=s.id, anchor_page_id=p.id))
    await db.flush()
    db.add(SeriesChapter(series_tag_id=s.id, anchor_page_id=p.id))
    with pytest.raises(IntegrityError):
        await db.flush()
@@ -0,0 +1,127 @@
 """FC-6.x Phase 2 — pending staging for add-from-post."""
 import pytest
 from sqlalchemy import select
 from backend.app.models import Artist, ImageRecord, Post, TagKind
 from backend.app.models.series_page import SeriesPage
 from backend.app.services.series_service import SeriesService
 from backend.app.services.tag_service import TagService
 pytestmark = pytest.mark.integration
 _SEQ = 0
 async def _artist(db, name):
    a = Artist(name=name, slug=name.lower().replace(" ", "-"))
    db.add(a)
    await db.flush()
    return a
 async def _post(db, artist, title, ext):
    p = Post(artist_id=artist.id, external_post_id=ext, post_title=title)
    db.add(p)
    await db.flush()
    return p
 async def _post_images(db, post, artist, n):
    global _SEQ
    ids = []
    for _ in range(n):
        _SEQ += 1
        rec = ImageRecord(
            path=f"/tmp/fc_pend_{_SEQ}.png", sha256=f"{_SEQ:064d}",
            size_bytes=1, mime="image/png", origin="downloaded",
            primary_post_id=post.id, artist_id=artist.id,
        )
        db.add(rec)
        await db.flush()
        ids.append(rec.id)
    return ids
 async def _placed_order(db, sid):
    rows = (
        await db.execute(
            select(SeriesPage.image_id)
            .where(
                SeriesPage.series_tag_id == sid,
                SeriesPage.status == "placed",
            )
            .order_by(SeriesPage.page_number)
        )
    ).scalars().all()
    return list(rows)
 async def _setup(db, name, seed_n=2):
    svc = SeriesService(db)
    artist = await _artist(db, name + " Artist")
    sid = (await TagService(db).find_or_create(name, TagKind.series)).id
    seed = []
    if seed_n:
        seed_post = await _post(db, artist, name + " seed", name + "-s")
        seed = await _post_images(db, seed_post, artist, seed_n)
        await svc.add_images(sid, seed)
    return svc, artist, sid, seed
@pytest.mark.asyncio
 async def test_place_pending_appends_and_flips_status(db):
    svc, artist, sid, seed = await _setup(db, "PA")
    post = await _post(db, artist, "PA pages", "pa-p")
    imgs = await _post_images(db, post, artist, 3)
    await svc.add_post(sid, post.id)
    placed = await svc.place_pending(sid, imgs)
    assert placed == 3
    assert await _placed_order(db, sid) == seed + imgs
    # nothing left pending; page numbers compact 1..5
    data = await svc.list_pages(sid)
    assert data["pending"] == []
    assert [p["page_number"] for p in data["pages"]] == [1, 2, 3, 4, 5]
@pytest.mark.asyncio
 async def test_place_pending_before_a_placed_page(db):
    svc, artist, sid, seed = await _setup(db, "PB")
    a, b = seed
    post = await _post(db, artist, "PB pages", "pb-p")
    x, y = await _post_images(db, post, artist, 2)
    await svc.add_post(sid, post.id)
    await svc.place_pending(sid, [x, y], before_image_id=b)
    assert await _placed_order(db, sid) == [a, x, y, b]
@pytest.mark.asyncio
 async def test_place_pending_ignores_already_placed(db):
    svc, artist, sid, seed = await _setup(db, "PC", seed_n=1)
    # the seed page is already placed — place_pending is a no-op for it.
    assert await svc.place_pending(sid, [seed[0]]) == 0
    assert await _placed_order(db, sid) == seed
@pytest.mark.asyncio
 async def test_remove_drops_a_pending_junk_page(db):
    svc, artist, sid, _ = await _setup(db, "PD", seed_n=0)
    post = await _post(db, artist, "PD pages", "pd-p")
    x, y, z = await _post_images(db, post, artist, 3)
    await svc.add_post(sid, post.id)
    # y is junk (a text-free alt) — drop it before placing.
    await svc.remove_images(sid, [y])
    data = await svc.list_pages(sid)
    assert [pg["image_id"] for pg in data["pending"][0]["pages"]] == [x, z]
@pytest.mark.asyncio
 async def test_place_pending_route_requires_ids(client):
    r = await client.post(
        "/api/tags", json={"name": "PReq", "kind": "series"}
    )
    sid = (await r.get_json())["id"]
    resp = await client.post(f"/api/series/{sid}/pending/place", json={})
    assert resp.status_code == 400
@@ -409,19 +409,18 @@ async def test_merge_repoints_series_pages(db):
    a = await svc.find_or_create("SerA", TagKind.series)
    b = await svc.find_or_create("SerB", TagKind.series)
    img = await _img(db)
-    cha = SeriesChapter(series_tag_id=a.id, chapter_number=1)
+    p = SeriesPage(series_tag_id=a.id, image_id=img, page_number=1)
-    db.add(cha)
+    db.add(p)
    await db.flush()
-    db.add(SeriesPage(
+    cha = SeriesChapter(series_tag_id=a.id, anchor_page_id=p.id)
-        series_tag_id=a.id, chapter_id=cha.id, image_id=img, page_number=1
+    db.add(cha)
    ))
    await db.flush()
    await svc.merge(a.id, b.id)
    owner = await db.scalar(
        select(SeriesPage.series_tag_id).where(SeriesPage.image_id == img)
    )
    assert owner == b.id
-    # The chapter moved to the survivor too, so the page's FK stayed valid.
+    # The chapter divider moved to the survivor too (its anchor page moved).
    ch_owner = await db.scalar(
        select(SeriesChapter.series_tag_id).where(SeriesChapter.id == cha.id)
    )