alembic/versions/0082_presentation_auto_hide.py

@@ -0,0 +1,85 @@
+"""presentation-chrome auto-hide (#141) — settings knobs + review table
+
+MLSettings gains presentation_auto_apply_enabled / _threshold and
+presentation_conflict_threshold: banner + editor-screenshot auto-hide on the
+sweep with a FLAT threshold (decoupled from content-head graduation), and a
+conflict threshold that flags an auto-hide that "also looks like content".
+
+New table presentation_review records an auto-hidden chrome image that also
+scored high on a content head, surfaced in the Hidden view for a keep-hidden /
+un-hide decision. Resolved rows are pruned by retention.
+
+Revision ID: 0082
+Revises: 0081
+Create Date: 2026-07-07
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "0082"
+down_revision: Union[str, None] = "0081"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "ml_settings",
+        sa.Column(
+            "presentation_auto_apply_enabled", sa.Boolean(), nullable=False,
+            server_default=sa.text("true"),
+        ),
+    )
+    op.add_column(
+        "ml_settings",
+        sa.Column(
+            "presentation_auto_apply_threshold", sa.Float(), nullable=False,
+            server_default=sa.text("0.90"),
+        ),
+    )
+    op.add_column(
+        "ml_settings",
+        sa.Column(
+            "presentation_conflict_threshold", sa.Float(), nullable=False,
+            server_default=sa.text("0.50"),
+        ),
+    )
+    op.create_table(
+        "presentation_review",
+        sa.Column(
+            "image_record_id", sa.Integer(),
+            sa.ForeignKey("image_record.id", ondelete="CASCADE"),
+            primary_key=True,
+        ),
+        sa.Column(
+            "tag_id", sa.Integer(),
+            sa.ForeignKey("tag.id", ondelete="CASCADE"), primary_key=True,
+        ),
+        sa.Column(
+            "conflict_tag_id", sa.Integer(),
+            sa.ForeignKey("tag.id", ondelete="SET NULL"), nullable=True,
+        ),
+        sa.Column("conflict_score", sa.Float(), nullable=False),
+        sa.Column(
+            "created_at", sa.DateTime(timezone=True), nullable=False,
+            server_default=sa.func.now(),
+        ),
+        sa.Column("resolved_at", sa.DateTime(timezone=True), nullable=True),
+    )
+    # The review list queries the unresolved flags (resolved_at IS NULL).
+    op.create_index(
+        "ix_presentation_review_resolved_at", "presentation_review",
+        ["resolved_at"],
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(
+        "ix_presentation_review_resolved_at", table_name="presentation_review"
+    )
+    op.drop_table("presentation_review")
+    op.drop_column("ml_settings", "presentation_conflict_threshold")
+    op.drop_column("ml_settings", "presentation_auto_apply_threshold")
+    op.drop_column("ml_settings", "presentation_auto_apply_enabled")

backend/app/api/gallery.py

@@ -3,9 +3,18 @@
 from datetime import UTC, datetime, timedelta
 
 from quart import Blueprint, jsonify, request
+from sqlalchemy import delete, select, update
+from sqlalchemy.orm import aliased
 
 from ..extensions import get_session
-from ..services.gallery_service import GalleryService
+from ..models import (
+    ImageRecord,
+    PresentationReview,
+    Tag,
+    TagSuggestionRejection,
+)
+from ..models.tag import image_tag
+from ..services.gallery_service import GalleryService, image_url, thumbnail_url
 
 gallery_bp = Blueprint("gallery", __name__, url_prefix="/api/gallery")
 
@@ -77,6 +86,9 @@ def _parse_filters():
     platform = request.args.get("platform") or None
     untagged = request.args.get("untagged") in ("1", "true", "yes")
     no_artist = request.args.get("no_artist") in ("1", "true", "yes")
+    # Show the presentation chrome (banner / editor screenshot) that the default
+    # gallery hides — the Hidden view sets this (milestone 141).
+    include_hidden = request.args.get("include_hidden") in ("1", "true", "yes")
     date_from = _parse_date(request.args.get("date_from"))
     date_to = _parse_date(request.args.get("date_to"))
     if date_to is not None:
@@ -88,6 +100,7 @@ def _parse_filters():
         "platform": platform,
         "untagged": untagged, "no_artist": no_artist,
         "date_from": date_from, "date_to": date_to,
+        "include_hidden": include_hidden,
     }
     return filters, sort
 
@@ -133,7 +146,11 @@ async def similar():
     except (KeyError, ValueError):
         return jsonify({"error": "similar_to query param required"}), 400
     # post_id is the exclusive post-detail view — not a similarity scope.
-    scope = {k: v for k, v in filters.items() if k != "post_id"}
+    # include_hidden is a gallery-browse flag; similar() has its OWN presentation
+    # exclusion (a similarity-quality concern, #1274), so drop it here (#141).
+    scope = {
+        k: v for k, v in filters.items() if k not in ("post_id", "include_hidden")
+    }
     async with get_session() as session:
         svc = GalleryService(session)
         try:
@@ -211,6 +228,97 @@ async def jump():
     return jsonify({"cursor": cursor})
 
 
+# -- Hidden-view review (#141): auto-hidden chrome flagged "also looks like
+#    content", surfaced in the gallery's Show-hidden review strip. -----------
+@gallery_bp.route("/hidden-review", methods=["GET"])
+async def hidden_review():
+    """Unresolved presentation auto-hide flags, most-concerning first (highest
+    content score) — for the gallery's Hidden-view review strip."""
+    ptag = aliased(Tag)
+    ctag = aliased(Tag)
+    async with get_session() as session:
+        rows = (await session.execute(
+            select(
+                PresentationReview.image_record_id,
+                PresentationReview.tag_id,
+                PresentationReview.conflict_tag_id,
+                PresentationReview.conflict_score,
+                ImageRecord.path, ImageRecord.thumbnail_path,
+                ImageRecord.sha256, ImageRecord.mime,
+                ptag.name.label("tag_name"),
+                ctag.name.label("conflict_name"),
+            )
+            .join(ImageRecord, ImageRecord.id == PresentationReview.image_record_id)
+            .join(ptag, ptag.id == PresentationReview.tag_id)
+            .outerjoin(ctag, ctag.id == PresentationReview.conflict_tag_id)
+            .where(PresentationReview.resolved_at.is_(None))
+            .order_by(PresentationReview.conflict_score.desc())
+        )).all()
+    return jsonify({"items": [
+        {
+            "image_id": r.image_record_id,
+            "tag_id": r.tag_id,
+            "tag_name": r.tag_name,
+            "conflict_tag_id": r.conflict_tag_id,
+            "conflict_name": r.conflict_name,
+            "conflict_score": r.conflict_score,
+            "thumbnail_url": thumbnail_url(r.thumbnail_path, r.sha256, r.mime),
+            "image_url": image_url(r.path),
+        }
+        for r in rows
+    ]})
+
+
+@gallery_bp.route(
+    "/hidden-review/<int:image_id>/<int:tag_id>/keep", methods=["POST"]
+)
+async def hidden_review_keep(image_id, tag_id):
+    """Keep the auto-hide: resolve the flag; the tag stays applied (#141)."""
+    async with get_session() as session:
+        await session.execute(
+            update(PresentationReview)
+            .where(
+                PresentationReview.image_record_id == image_id,
+                PresentationReview.tag_id == tag_id,
+            )
+            .values(resolved_at=datetime.now(UTC))
+        )
+        await session.commit()
+    return "", 204
+
+
+@gallery_bp.route(
+    "/hidden-review/<int:image_id>/<int:tag_id>/unhide", methods=["POST"]
+)
+async def hidden_review_unhide(image_id, tag_id):
+    """Un-hide: remove the presentation tag (image returns to the gallery), record
+    a rejection so the head LEARNS it misfired, and resolve the flag (#141)."""
+    from sqlalchemy.dialects.postgresql import insert as pg_insert
+
+    async with get_session() as session:
+        await session.execute(
+            delete(image_tag).where(
+                image_tag.c.image_record_id == image_id,
+                image_tag.c.tag_id == tag_id,
+            )
+        )
+        await session.execute(
+            pg_insert(TagSuggestionRejection)
+            .values(image_record_id=image_id, tag_id=tag_id)
+            .on_conflict_do_nothing()
+        )
+        await session.execute(
+            update(PresentationReview)
+            .where(
+                PresentationReview.image_record_id == image_id,
+                PresentationReview.tag_id == tag_id,
+            )
+            .values(resolved_at=datetime.now(UTC))
+        )
+        await session.commit()
+    return "", 204
+
+
 @gallery_bp.route("/image/<int:image_id>", methods=["GET"])
 async def image_detail(image_id: int):
     async with get_session() as session:

backend/app/api/ml_admin.py

@@ -39,6 +39,9 @@ _EDITABLE = (
     "ccip_match_threshold",
     "ccip_auto_apply_enabled",
     "ccip_auto_apply_threshold",
+    "presentation_auto_apply_enabled",
+    "presentation_auto_apply_threshold",
+    "presentation_conflict_threshold",
     "embedder_model_name",
     "embedder_model_version",
     *_DETECTOR_FIELDS,
@@ -96,6 +99,9 @@ async def get_settings():
             "ccip_match_threshold": s.ccip_match_threshold,
             "ccip_auto_apply_enabled": s.ccip_auto_apply_enabled,
             "ccip_auto_apply_threshold": s.ccip_auto_apply_threshold,
+            "presentation_auto_apply_enabled": s.presentation_auto_apply_enabled,
+            "presentation_auto_apply_threshold": s.presentation_auto_apply_threshold,
+            "presentation_conflict_threshold": s.presentation_conflict_threshold,
             "embedder_model_name": s.embedder_model_name,
             **{f: getattr(s, f) for f in _DETECTOR_FIELDS},
         }
@@ -150,6 +156,12 @@ def _validate(p: dict) -> str | None:
         return "ccip_match_threshold must be between 0.5 and 0.999"
     if not (0.5 <= float(p["ccip_auto_apply_threshold"]) <= 0.999):
         return "ccip_auto_apply_threshold must be between 0.5 and 0.999"
+    # Presentation chrome auto-hide (#141). Auto-apply runs high (hiding is
+    # consequential); the conflict cut is a plain probability [0,1].
+    if not (0.5 <= float(p["presentation_auto_apply_threshold"]) <= 0.999):
+        return "presentation_auto_apply_threshold must be between 0.5 and 0.999"
+    if not (0.0 <= float(p["presentation_conflict_threshold"]) <= 1.0):
+        return "presentation_conflict_threshold must be between 0 and 1"
     # Embedder model swap (#1190): both must be non-empty. Changing them means a
     # different embedding space — the operator must re-embed + retrain after.
     for key in ("embedder_model_name", "embedder_model_version"):

backend/app/celery_app.py

@@ -152,6 +152,15 @@ def make_celery() -> Celery:
                 "schedule": 86400.0,  # soft auto-apply: drop auto-tags now below
                 # their threshold (m139); no-op unless the auto-apply switch is on
             },
+            "presentation-auto-apply-daily": {
+                "task": "backend.app.tasks.ml.scheduled_presentation_auto_apply",
+                "schedule": 86400.0,  # auto-hide banner/editor chrome (#141);
+                # no-op unless presentation_auto_apply_enabled
+            },
+            "prune-presentation-reviews-daily": {
+                "task": "backend.app.tasks.ml.prune_presentation_reviews",
+                "schedule": 86400.0,  # retention: drop resolved review flags >30d
+            },
             "snapshot-head-metrics-daily": {
                 "task": "backend.app.tasks.maintenance.snapshot_head_metrics",
                 "schedule": 86400.0,

backend/app/models/__init__.py

@@ -28,6 +28,7 @@ from .pixiv_failed_media import PixivFailedMedia
 from .pixiv_seen_media import PixivSeenMedia
 from .post import Post
 from .post_attachment import PostAttachment
+from .presentation_review import PresentationReview
 from .series_chapter import SeriesChapter
 from .series_page import SeriesPage
 from .series_suggestion import SeriesSuggestion
@@ -57,6 +58,7 @@ __all__ = [
     "SubscribeStarSeenMedia",
     "Post",
     "PostAttachment",
+    "PresentationReview",
     "SeriesChapter",
     "SeriesPage",
     "SeriesSuggestion",

backend/app/models/ml_settings.py

@@ -84,6 +84,22 @@ class MLSettings(Base):
         # character matches auto-tag.
         Float, nullable=False, default=0.95
     )
+    # -- Presentation chrome auto-hide (#141) -------------------------------
+    # banner / editor screenshot auto-apply on the sweep with their OWN flat
+    # threshold (decoupled from content-head graduation). Hiding is consequential
+    # so it runs HIGH. `wip` is never auto-applied. When an image would be
+    # auto-hidden but ALSO scores >= presentation_conflict_threshold on a content
+    # head, it's still hidden but flagged for review (PresentationReview) instead
+    # of buried silently. ON by default (opt-out); every auto-tag is reversible.
+    presentation_auto_apply_enabled: Mapped[bool] = mapped_column(
+        Boolean, nullable=False, default=True
+    )
+    presentation_auto_apply_threshold: Mapped[float] = mapped_column(
+        Float, nullable=False, default=0.90
+    )
+    presentation_conflict_threshold: Mapped[float] = mapped_column(
+        Float, nullable=False, default=0.50
+    )
     # Default = SigLIP 2 (so400m, 512px) for new installs (migration 0069);
     # existing libraries keep their stored value until the operator re-embeds.
     embedder_model_version: Mapped[str] = mapped_column(

backend/app/models/presentation_review.py

@@ -0,0 +1,40 @@
+"""PresentationReview — an auto-hidden presentation tag that ALSO looked like
+real content, flagged for operator review (milestone 141).
+
+When the auto-apply sweep hides an image as chrome (banner / editor screenshot)
+but the image ALSO scores highly on a content head, it still hides it but records
+this row so the Hidden view can surface it ("⚠ also looks like <conflict tag>")
+for a keep-hidden / un-hide decision. Resolved rows are pruned by retention.
+"""
+
+from datetime import datetime
+
+from sqlalchemy import DateTime, Float, ForeignKey, func
+from sqlalchemy.orm import Mapped, mapped_column
+
+from .base import Base
+
+
+class PresentationReview(Base):
+    __tablename__ = "presentation_review"
+
+    image_record_id: Mapped[int] = mapped_column(
+        ForeignKey("image_record.id", ondelete="CASCADE"), primary_key=True
+    )
+    # The presentation tag that was auto-applied (banner / editor screenshot).
+    tag_id: Mapped[int] = mapped_column(
+        ForeignKey("tag.id", ondelete="CASCADE"), primary_key=True
+    )
+    # The content tag the image ALSO scored high on — the "concerning" signal.
+    # SET NULL (not CASCADE): losing the conflict tag shouldn't erase the flag.
+    conflict_tag_id: Mapped[int | None] = mapped_column(
+        ForeignKey("tag.id", ondelete="SET NULL"), nullable=True
+    )
+    conflict_score: Mapped[float] = mapped_column(Float, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, server_default=func.now()
+    )
+    # Set when the operator keeps-hidden or un-hides; retention prunes resolved.
+    resolved_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )

backend/app/services/gallery_service.py

@@ -187,7 +187,7 @@ def _apply_scope(
     stmt, *, tag_ids, post_id, artist_id, media_type,
     tag_or_groups=None, tag_exclude=None,
     platform=None, untagged=False, no_artist=False,
-    date_from=None, date_to=None,
+    date_from=None, date_to=None, hidden_tag_ids=None,
 ):
     """Apply the composable gallery filters to a statement.
 
@@ -224,6 +224,12 @@ def _apply_scope(
         stmt = stmt.where(image_in_any_tag_scope(group))
     if tag_exclude:
         stmt = stmt.where(~image_in_any_tag_scope(tag_exclude))
+    # Presentation chrome (banner / editor screenshot) is hidden from the default
+    # gallery — an implicit exclude the caller supplies unless the operator asked
+    # to include hidden or is explicitly filtering for a presentation tag
+    # (milestone 141). `wip` is NOT hidden. Resolved to ids by _hidden_tag_ids.
+    if hidden_tag_ids:
+        stmt = stmt.where(~image_in_any_tag_scope(hidden_tag_ids))
     prov = _provenance_clause(post_id, artist_id)
     if prov is not None:
         stmt = stmt.where(prov)
@@ -410,6 +416,31 @@ class GalleryService:
     def __init__(self, session: AsyncSession):
         self.session = session
 
+    async def _hidden_tag_ids(
+        self, include_hidden, tag_ids, tag_or_groups,
+    ) -> list[int] | None:
+        """Presentation-chrome tag ids to implicitly exclude from a gallery query,
+        or None. None when the caller asked to include hidden, when the operator
+        is explicitly filtering FOR a presentation tag (they clearly want to see
+        it), or when no presentation tags exist. (milestone 141)"""
+        if include_hidden:
+            return None
+        rows = await self.session.execute(
+            select(Tag.id).where(
+                Tag.is_system.is_(True),
+                Tag.name.in_(PRESENTATION_SYSTEM_TAGS),
+            )
+        )
+        pres = [r[0] for r in rows]
+        if not pres:
+            return None
+        explicit = set(tag_ids or [])
+        for group in tag_or_groups or []:
+            explicit.update(group)
+        if explicit & set(pres):
+            return None
+        return pres
+
     async def scroll(
         self,
         cursor: str | None,
@@ -426,12 +457,16 @@ class GalleryService:
         no_artist: bool = False,
         date_from: datetime | None = None,
         date_to: datetime | None = None,
+        include_hidden: bool = False,
     ) -> GalleryPage:
         if limit < 1 or limit > 200:
             raise ValueError("limit must be between 1 and 200")
         _require_single_filter(
             tag_ids, post_id, artist_id, tag_or_groups, tag_exclude,
         )
+        hidden = await self._hidden_tag_ids(
+            include_hidden, tag_ids, tag_or_groups,
+        )
 
         # eff is the ACTIVE sort column (effective_date or earliest_post_date);
         # the cursor, ordering and year/month grouping all key off it, so the
@@ -444,7 +479,7 @@ class GalleryService:
             artist_id=artist_id, media_type=media_type,
             tag_or_groups=tag_or_groups, tag_exclude=tag_exclude,
             platform=platform, untagged=untagged, no_artist=no_artist,
-            date_from=date_from, date_to=date_to,
+            date_from=date_from, date_to=date_to, hidden_tag_ids=hidden,
         )
 
         descending = sort not in _ASCENDING_SORTS
@@ -497,6 +532,7 @@ class GalleryService:
         no_artist: bool = False,
         date_from: datetime | None = None,
         date_to: datetime | None = None,
+        include_hidden: bool = False,
     ) -> list[TimelineBucket]:
         eff = _effective_date_col()
         year_col = func.date_part("year", eff).label("yr")
@@ -508,12 +544,15 @@ class GalleryService:
         _require_single_filter(
             tag_ids, post_id, artist_id, tag_or_groups, tag_exclude,
         )
+        hidden = await self._hidden_tag_ids(
+            include_hidden, tag_ids, tag_or_groups,
+        )
         stmt = _apply_scope(
             stmt, tag_ids=tag_ids, post_id=post_id,
             artist_id=artist_id, media_type=media_type,
             tag_or_groups=tag_or_groups, tag_exclude=tag_exclude,
             platform=platform, untagged=untagged, no_artist=no_artist,
-            date_from=date_from, date_to=date_to,
+            date_from=date_from, date_to=date_to, hidden_tag_ids=hidden,
         )
         stmt = stmt.group_by(year_col, month_col).order_by(year_col.desc(), month_col.desc())
         rows = (await self.session.execute(stmt)).all()
@@ -527,7 +566,7 @@ class GalleryService:
         tag_exclude: list[int] | None = None,
         platform: str | None = None, untagged: bool = False,
         no_artist: bool = False, date_from: datetime | None = None,
-        date_to: datetime | None = None,
+        date_to: datetime | None = None, include_hidden: bool = False,
     ) -> str | None:
         """Returns a cursor that, when passed to scroll() with the same sort,
         positions at the first image of the given year-month. None if the
@@ -544,12 +583,15 @@ class GalleryService:
         _require_single_filter(
             tag_ids, post_id, artist_id, tag_or_groups, tag_exclude,
         )
+        hidden = await self._hidden_tag_ids(
+            include_hidden, tag_ids, tag_or_groups,
+        )
         stmt = _apply_scope(
             stmt, tag_ids=tag_ids, post_id=post_id,
             artist_id=artist_id, media_type=media_type,
             tag_or_groups=tag_or_groups, tag_exclude=tag_exclude,
             platform=platform, untagged=untagged, no_artist=no_artist,
-            date_from=date_from, date_to=date_to,
+            date_from=date_from, date_to=date_to, hidden_tag_ids=hidden,
         )
         descending = sort != "oldest"
         if descending:
@@ -574,6 +616,7 @@ class GalleryService:
         platform: str | None = None,
         untagged: bool = False, no_artist: bool = False,
         date_from: datetime | None = None, date_to: datetime | None = None,
+        include_hidden: bool = False,
     ) -> GalleryFacets:
         """Live facet counts scoped to the current filter. Each facet GROUP is
         computed with all OTHER active filters applied but its OWN selection
@@ -584,10 +627,14 @@ class GalleryService:
         _require_single_filter(
             tag_ids, post_id, artist_id, tag_or_groups, tag_exclude,
         )
+        hidden = await self._hidden_tag_ids(
+            include_hidden, tag_ids, tag_or_groups,
+        )
         common = {
             "tag_ids": tag_ids, "post_id": post_id,
             "artist_id": artist_id, "media_type": media_type,
             "tag_or_groups": tag_or_groups, "tag_exclude": tag_exclude,
+            "hidden_tag_ids": hidden,
         }
 
         # total — the full active filter (the headline result count).

backend/app/services/ml/heads.py

@@ -32,13 +32,14 @@ from ...models import (
     ImageRecord,
     ImageRegion,
     MLSettings,
+    PresentationReview,
     Tag,
     TagHead,
     TagKind,
     TagPositiveConfirmation,
     TagSuggestionRejection,
 )
-from ...models.tag import image_tag
+from ...models.tag import PRESENTATION_SYSTEM_TAGS, image_tag
 from .training_data import (
     _AUTO_SOURCES,
     _auto_apply_point,
@@ -649,8 +650,11 @@ def start_head_auto_apply_run(session: Session, params: dict[str, Any]) -> int:
 
 
 def _auto_apply_heads(session: Session, embedding_version: str, min_pos: int):
-    """Eligible heads to fire: graduated (auto_apply_threshold set), enough
+    """Eligible CONTENT heads to fire: graduated (auto_apply_threshold set),
-    support, current embedding. Returns the row list (tag_id/name/weights/...)."""
+    enough support, current embedding, NON-system. System tags never auto-apply
+    via this path — `wip` never auto-applies at all, and banner/editor screenshot
+    go through the presentation path at their own flat threshold (#141). Returns
+    the row list (tag_id/name/weights/...)."""
     return session.execute(
         select(
             TagHead.tag_id, Tag.name, TagHead.weights, TagHead.bias,
@@ -660,6 +664,7 @@ def _auto_apply_heads(session: Session, embedding_version: str, min_pos: int):
         .where(TagHead.embedding_version == embedding_version)
         .where(TagHead.auto_apply_threshold.is_not(None))
         .where(TagHead.n_pos >= min_pos)
+        .where(~Tag.is_system)
     ).all()
 
 
@@ -743,6 +748,162 @@ def auto_apply_sweep(
     return {"n_applied": sum(applied), "concepts": concepts}
 
 
+_PRESENTATION_SOURCE = "presentation_auto"
+
+
+def _presentation_heads(session: Session, embedding_version: str):
+    """Trained heads for the presentation chrome tags (banner / editor screenshot).
+    They fire at the FLAT presentation threshold regardless of graduation — a head
+    exists once the operator has labelled enough chrome (head_min_positives)."""
+    return session.execute(
+        select(TagHead.tag_id, Tag.name, TagHead.weights, TagHead.bias)
+        .join(Tag, Tag.id == TagHead.tag_id)
+        .where(TagHead.embedding_version == embedding_version)
+        .where(Tag.is_system.is_(True))
+        .where(Tag.name.in_(PRESENTATION_SYSTEM_TAGS))
+    ).all()
+
+
+def _conflict_heads(session: Session, embedding_version: str):
+    """ALL content (non-system) heads — the "does this ALSO look like real
+    content" signal for the presentation conflict guard (#141)."""
+    return session.execute(
+        select(TagHead.tag_id, TagHead.weights, TagHead.bias)
+        .join(Tag, Tag.id == TagHead.tag_id)
+        .where(TagHead.embedding_version == embedding_version)
+        .where(~Tag.is_system)
+    ).all()
+
+
+def _valued_image_ids(session: Session) -> set[int]:
+    """Images the operator has shown they value: carrying a HUMAN or CONFIRMED
+    content (non-system) tag. The presentation sweep never auto-hides these
+    (guard 1) — you tagged it, so the model doesn't get to bury it (#141)."""
+    confirmed = exists().where(
+        TagPositiveConfirmation.image_record_id == image_tag.c.image_record_id,
+        TagPositiveConfirmation.tag_id == image_tag.c.tag_id,
+    )
+    rows = session.execute(
+        select(image_tag.c.image_record_id)
+        .join(Tag, Tag.id == image_tag.c.tag_id)
+        .where(~Tag.is_system)
+        .where(image_tag.c.source.not_in(_AUTO_SOURCES) | confirmed)
+    ).all()
+    return {r[0] for r in rows}
+
+
+def presentation_auto_apply_sweep(session: Session, dry_run: bool = False) -> dict:
+    """Auto-hide presentation chrome (banner / editor screenshot) at the FLAT
+    presentation threshold (#141) — NOT the per-head graduated threshold. Two
+    guards keep it safe: (1) never hide an image carrying a human/confirmed content
+    tag; (2) if an image about to be hidden ALSO scores >= the conflict threshold
+    on a content head, still hide it but flag it (PresentationReview) so the Hidden
+    view surfaces "also looks like <X>" for review. No-op unless
+    presentation_auto_apply_enabled. numpy-only (no sklearn). Returns
+    {n_applied, n_flagged, concepts}."""
+    import numpy as np
+    from sqlalchemy.dialects.postgresql import insert as pg_insert
+
+    settings = _settings(session)
+    if not dry_run and not settings.presentation_auto_apply_enabled:
+        return {"n_applied": 0, "n_flagged": 0, "concepts": []}
+    ver = settings.embedder_model_version
+    pres = _presentation_heads(session, ver)
+    if not pres:
+        return {"n_applied": 0, "n_flagged": 0, "concepts": []}
+    thr = float(settings.presentation_auto_apply_threshold)
+    conflict_thr = float(settings.presentation_conflict_threshold)
+
+    Wp = np.vstack([np.asarray(r.weights, dtype=np.float32) for r in pres])
+    bp = np.asarray([r.bias for r in pres], dtype=np.float32)
+    pres_tag_ids = [r.tag_id for r in pres]
+    pres_names = [r.name for r in pres]
+
+    conf = _conflict_heads(session, ver)
+    Wc = bc = conf_tag_ids = None
+    if conf:
+        Wc = np.vstack([np.asarray(r.weights, dtype=np.float32) for r in conf])
+        bc = np.asarray([r.bias for r in conf], dtype=np.float32)
+        conf_tag_ids = [r.tag_id for r in conf]
+
+    valued = _valued_image_ids(session)
+
+    # Skip images that already carry, or have rejected, each presentation tag.
+    skip = {tid: set() for tid in pres_tag_ids}
+    for tid in pres_tag_ids:
+        for (iid,) in session.execute(
+            select(image_tag.c.image_record_id).where(image_tag.c.tag_id == tid)
+        ):
+            skip[tid].add(iid)
+        for (iid,) in session.execute(
+            select(TagSuggestionRejection.image_record_id).where(
+                TagSuggestionRejection.tag_id == tid
+            )
+        ):
+            skip[tid].add(iid)
+
+    applied = [0] * len(pres)
+    n_flagged = 0
+    scanned = 0
+    all_ids = list(session.execute(
+        select(ImageRecord.id).where(ImageRecord.siglip_embedding.is_not(None))
+    ).scalars())
+    for start in range(0, len(all_ids), _AUTO_APPLY_CHUNK):
+        chunk = all_ids[start:start + _AUTO_APPLY_CHUNK]
+        emb = _load_embeddings(session, chunk)
+        cids = [i for i in chunk if i in emb]
+        if not cids:
+            continue
+        Xn = _l2norm(np.vstack([emb[i] for i in cids]).astype(np.float32), np)
+        probs = 1.0 / (1.0 + np.exp(-(Xn @ Wp.T + bp)))       # (N, P)
+        if Wc is not None:
+            cprobs = 1.0 / (1.0 + np.exp(-(Xn @ Wc.T + bc)))  # (N, C)
+            max_c = cprobs.max(axis=1)
+            arg_c = cprobs.argmax(axis=1)
+        scanned += len(cids)
+        for p in range(len(pres)):
+            tid = pres_tag_ids[p]
+            for idx in np.where(probs[:, p] >= thr)[0]:
+                iid = cids[int(idx)]
+                if iid in skip[tid] or iid in valued:
+                    continue
+                skip[tid].add(iid)
+                applied[p] += 1
+                if not dry_run:
+                    session.execute(
+                        pg_insert(image_tag)
+                        .values(
+                            image_record_id=iid, tag_id=tid,
+                            source=_PRESENTATION_SOURCE,
+                        )
+                        .on_conflict_do_nothing()
+                    )
+                # Guard 2: also looks like content → hide but flag for review.
+                if Wc is not None and float(max_c[idx]) >= conflict_thr:
+                    n_flagged += 1
+                    if not dry_run:
+                        session.execute(
+                            pg_insert(PresentationReview)
+                            .values(
+                                image_record_id=iid, tag_id=tid,
+                                conflict_tag_id=conf_tag_ids[int(arg_c[idx])],
+                                conflict_score=float(max_c[idx]),
+                            )
+                            .on_conflict_do_nothing()
+                        )
+        if not dry_run:
+            session.commit()
+
+    concepts = [
+        {"tag_id": pres_tag_ids[p], "name": pres_names[p],
+         "applied": applied[p], "scanned": scanned, "threshold": thr}
+        for p in range(len(pres))
+    ]
+    return {
+        "n_applied": sum(applied), "n_flagged": n_flagged, "concepts": concepts,
+    }
+
+
 def retract_auto_applied_heads(session: Session) -> int:
     """Soft auto-apply (milestone 139): re-score every standing source='head_auto'
     tag against its CURRENT head and REMOVE the ones now BELOW the head's

backend/app/services/ml/training_data.py

@@ -29,7 +29,7 @@ from ...models.tag import image_tag
 # a CCIP reference) unless the operator confirms them (milestone 139). Keeping
 # auto-applied predictions out of training is what makes them "soft" — a misfire
 # can't reinforce itself, so the retraction sweep can actually drop it.
-_AUTO_SOURCES = ("head_auto", "ccip_auto", "ml_auto")
+_AUTO_SOURCES = ("head_auto", "ccip_auto", "ml_auto", "presentation_auto")
 
 
 def _hygiene_excluded_ids(session: Session) -> set[int]:

backend/app/tasks/ml.py

@@ -594,6 +594,46 @@ def scheduled_ccip_auto_apply() -> str:
         return f"applied={applied}"
 
 
+@celery.task(
+    name="backend.app.tasks.ml.scheduled_presentation_auto_apply",
+    soft_time_limit=1800, time_limit=2100,
+)
+def scheduled_presentation_auto_apply() -> str:
+    """Auto-hide presentation chrome (banner / editor screenshot) on a daily
+    passive sweep (#141). No-op unless presentation_auto_apply_enabled. Idempotent
+    — already-hidden images are skipped — so an interrupted run simply re-runs next
+    cycle (that IS the recovery). Wall-clock bounded by the task time limits."""
+    from ..services.ml.heads import presentation_auto_apply_sweep
+
+    SessionLocal = _sync_session_factory()
+    with SessionLocal() as session:
+        result = presentation_auto_apply_sweep(session)
+    return f"applied={result['n_applied']} flagged={result['n_flagged']}"
+
+
+@celery.task(name="backend.app.tasks.ml.prune_presentation_reviews")
+def prune_presentation_reviews() -> str:
+    """Retention (rule 89): drop RESOLVED presentation-review flags older than 30
+    days — the operator has acted on them, so they're just history (#141)."""
+    from datetime import UTC, datetime, timedelta
+
+    from sqlalchemy import delete as sa_delete
+
+    from ..models import PresentationReview
+
+    cutoff = datetime.now(UTC) - timedelta(days=30)
+    SessionLocal = _sync_session_factory()
+    with SessionLocal() as session:
+        res = session.execute(
+            sa_delete(PresentationReview).where(
+                PresentationReview.resolved_at.is_not(None),
+                PresentationReview.resolved_at < cutoff,
+            )
+        )
+        session.commit()
+    return f"pruned={res.rowcount}"
+
+
 @celery.task(
     name="backend.app.tasks.ml.scheduled_retract_auto_tags",
     soft_time_limit=1800, time_limit=2100,

frontend/src/components/gallery/GalleryFacetPanel.vue

@@ -34,6 +34,15 @@
           :color="store.filter.no_artist ? 'accent' : undefined"
           @click="toggleFlag('no_artist')"
         >No artist<span class="fc-facets__count">{{ facetCount('no_artist') }}</span></v-chip>
+        <!-- Reveal presentation chrome (banner / editor screenshot) the gallery
+             hides by default (milestone 141). A browse-mode toggle, not a count. -->
+        <v-chip
+          size="small" label
+          :variant="store.filter.include_hidden ? 'flat' : 'tonal'"
+          :color="store.filter.include_hidden ? 'accent' : undefined"
+          title="Show hidden — reveal banners / editor screenshots the gallery sets aside by default"
+          @click="toggleFlag('include_hidden')"
+        >Show hidden</v-chip>
       </div>
     </div>
 

frontend/src/components/gallery/GalleryFilterBar.vue

@@ -160,7 +160,7 @@ let debounce = null
 const refineCount = computed(() => {
   const f = store.filter
   return (f.platform ? 1 : 0) + (f.untagged ? 1 : 0) + (f.no_artist ? 1 : 0)
-    + (f.date_from ? 1 : 0) + (f.date_to ? 1 : 0)
+    + (f.include_hidden ? 1 : 0) + (f.date_from ? 1 : 0) + (f.date_to ? 1 : 0)
 })
 const hasRefineFilters = computed(() => refineCount.value > 0)
 

frontend/src/components/gallery/HiddenReviewStrip.vue

@@ -0,0 +1,151 @@
+<template>
+  <!-- Shown atop the gallery when "Show hidden" is on: auto-hidden chrome that
+       ALSO looked like real content, most-concerning first, with keep / un-hide
+       (#141). Renders nothing when there's nothing to review. -->
+  <section v-if="items.length" class="fc-review" aria-label="Hidden images to review">
+    <div class="fc-review__head">
+      <v-icon size="18" color="warning">mdi-alert-outline</v-icon>
+      <span class="fc-review__title">
+        {{ items.length }} auto-hidden {{ items.length === 1 ? 'image' : 'images' }}
+        may be real content — review before they stay hidden
+      </span>
+    </div>
+    <div class="fc-review__cards">
+      <div
+        v-for="it in items" :key="keyOf(it)" class="fc-review-card"
+      >
+        <img
+          :src="it.thumbnail_url" :alt="it.tag_name"
+          class="fc-review-card__thumb" loading="lazy"
+        >
+        <div class="fc-review-card__body">
+          <div
+            class="fc-review-card__conflict"
+            :title="`Scored ${Math.round(it.conflict_score * 100)}% on “${it.conflict_name || 'a content tag'}”`"
+          >
+            also looks like <strong>{{ it.conflict_name || 'content' }}</strong>
+          </div>
+          <div class="fc-review-card__tag">hidden as {{ it.tag_name }}</div>
+          <div class="fc-review-card__acts">
+            <button
+              type="button" class="fc-review-btn fc-review-btn--keep"
+              :disabled="busy.includes(keyOf(it))" @click="resolve(it, 'keep')"
+            >Keep hidden</button>
+            <button
+              type="button" class="fc-review-btn fc-review-btn--unhide"
+              :disabled="busy.includes(keyOf(it))" @click="resolve(it, 'unhide')"
+            >Un-hide</button>
+          </div>
+        </div>
+      </div>
+    </div>
+  </section>
+</template>
+
+<script setup>
+import { ref, watch } from 'vue'
+import { useApi } from '../../composables/useApi.js'
+import { useGalleryStore } from '../../stores/gallery.js'
+import { toast } from '../../utils/toast.js'
+
+const api = useApi()
+const store = useGalleryStore()
+
+const items = ref([])
+const busy = ref([])
+
+function keyOf(it) { return `${it.image_id}:${it.tag_id}` }
+
+async function load() {
+  if (!store.filter.include_hidden) { items.value = []; return }
+  try {
+    const body = await api.get('/api/gallery/hidden-review')
+    items.value = body.items || []
+  } catch { items.value = [] }
+}
+
+async function resolve(it, action) {
+  const k = keyOf(it)
+  busy.value = [...busy.value, k]
+  try {
+    await api.post(`/api/gallery/hidden-review/${it.image_id}/${it.tag_id}/${action}`)
+    items.value = items.value.filter((x) => keyOf(x) !== k)
+    if (action === 'unhide') {
+      toast({ text: `Un-hidden — “${it.tag_name}” removed; it'll train the head`, type: 'success' })
+    }
+  } catch (e) {
+    toast({
+      text: `Could not ${action === 'keep' ? 'keep hidden' : 'un-hide'}: ${e.message}`,
+      type: 'error',
+    })
+  } finally {
+    busy.value = busy.value.filter((x) => x !== k)
+  }
+}
+
+// Fetch whenever "Show hidden" flips on (immediate covers a mount already-on).
+watch(() => store.filter.include_hidden, load, { immediate: true })
+</script>
+
+<style scoped>
+.fc-review {
+  margin-bottom: 14px;
+  padding: 12px;
+  border: 1px solid rgb(var(--v-theme-warning), 0.4);
+  background: rgb(var(--v-theme-warning), 0.06);
+  border-radius: 8px;
+}
+.fc-review__head {
+  display: flex; align-items: center; gap: 8px; margin-bottom: 10px;
+}
+.fc-review__title {
+  font-size: 14px; font-weight: 600;
+  color: rgb(var(--v-theme-on-surface));
+}
+.fc-review__cards {
+  display: flex; gap: 10px; overflow-x: auto; padding-bottom: 4px;
+}
+.fc-review-card {
+  flex: 0 0 auto; width: 150px;
+  display: flex; flex-direction: column;
+  border: 1px solid rgb(var(--v-theme-surface-light));
+  border-radius: 6px; overflow: hidden;
+  background: rgb(var(--v-theme-surface));
+}
+.fc-review-card__thumb {
+  width: 100%; height: 96px; object-fit: cover; display: block;
+  background: rgb(var(--v-theme-surface-light));
+}
+.fc-review-card__body { padding: 6px 8px; }
+.fc-review-card__conflict {
+  font-size: 11px; color: rgb(var(--v-theme-on-surface));
+  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+}
+.fc-review-card__conflict strong { color: rgb(var(--v-theme-warning)); }
+.fc-review-card__tag {
+  font-size: 10px; color: rgb(var(--v-theme-on-surface-variant));
+  margin: 1px 0 6px;
+  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+}
+.fc-review-card__acts { display: flex; gap: 4px; }
+.fc-review-btn {
+  flex: 1; font-size: 11px; padding: 3px 4px; border-radius: 4px;
+  cursor: pointer; border: 1px solid transparent;
+}
+.fc-review-btn:disabled { opacity: 0.5; cursor: default; }
+.fc-review-btn--keep {
+  background: transparent;
+  color: rgb(var(--v-theme-on-surface-variant));
+  border-color: rgb(var(--v-theme-on-surface-variant), 0.4);
+}
+.fc-review-btn--keep:hover:not(:disabled) {
+  background: rgb(var(--v-theme-on-surface-variant), 0.1);
+}
+.fc-review-btn--unhide {
+  background: rgb(var(--v-theme-accent)); color: #fff;
+}
+.fc-review-btn--unhide:hover:not(:disabled) { opacity: 0.9; }
+.fc-review-btn:focus-visible {
+  outline: 2px solid rgb(var(--v-theme-accent)); outline-offset: 1px;
+}
+</style>

frontend/src/components/modal/TagChip.vue

@@ -10,7 +10,7 @@
       @click:close="$emit('remove', tag.id)"
     >
       <v-icon start size="x-small">{{ iconFor(tag.kind) }}</v-icon>
-      {{ tag.name }}<v-icon
+      <span class="fc-tag-chip__name">{{ tag.name }}</span><v-icon
         v-if="tag.is_system" end size="x-small" class="fc-tag-chip__system"
         title="System tag — tagged items are excluded from training other concepts"
       >mdi-shield-outline</v-icon><span
@@ -29,7 +29,7 @@
       :title="`Keep “${tag.name}” — confirm this auto-tag so it trains the model and won't be retracted`"
       :aria-label="`Confirm ${tag.name}`"
       @click.stop="$emit('confirm', tag)"
-    ><v-icon size="14">mdi-check</v-icon></button>
+    ><v-icon size="16">mdi-check</v-icon></button>
     <!-- Modal-safe kebab is baked into KebabMenu (this chip lives in the
          teleported image modal — #711). System tags hide it entirely: rename
          is refused server-side (the hygiene machinery keys on the row) and
@@ -130,7 +130,17 @@ function iconFor (k) { return KIND_ICONS[k] || 'mdi-tag' }
 </script>
 
 <style scoped>
-.fc-tag-chip { display: inline-flex; align-items: center; gap: 1px; }
+/* A chip must never exceed the rail — a long character+fandom(+AUTO) chip used
+   to overflow the right edge and clip its close ✕ (operator-flagged 2026-07-06).
+   The name is the elastic part: it ellipsis-truncates so the ✕, fandom, and AUTO
+   badge stay reachable. Full name is still available via the chip's hover title. */
+.fc-tag-chip { display: inline-flex; align-items: center; gap: 1px; max-width: 100%; min-width: 0; }
+.fc-tag-chip__nav { max-width: 100%; min-width: 0; }
+.fc-tag-chip__nav :deep(.v-chip__content) { min-width: 0; overflow: hidden; }
+.fc-tag-chip__name {
+  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+  min-width: 0; flex: 0 1 auto;
+}
 /* The chip body navigates to the filtered gallery (#5); signal it's clickable.
    The close ✕ (remove) and the sibling kebab stay as the explicit controls. */
 .fc-tag-chip__nav { cursor: pointer; }
@@ -152,16 +162,18 @@ function iconFor (k) { return KIND_ICONS[k] || 'mdi-tag' }
   border: 1px solid rgb(var(--v-theme-on-surface-variant), 0.3);
   padding: 0 4px; border-radius: 999px;
 }
-/* Keep/confirm — a success-tinted check next to a provisional auto-tag. */
+/* Keep/confirm — the SAME filled green ✓ circle as the suggestion accept button
+   (.fc-act--yes in SuggestionItem), so "accept this tag" reads identically
+   wherever it appears (operator-asked 2026-07-06). */
 .fc-tag-chip__confirm {
   flex: 0 0 auto;
+  width: 26px; height: 26px; border-radius: 50%; border: none; cursor: pointer;
   display: inline-flex; align-items: center; justify-content: center;
-  width: 20px; height: 20px; border-radius: 50%;
+  color: #fff; background: rgb(var(--v-theme-success));
-  border: none; background: transparent; cursor: pointer;
+  opacity: 0.9; transition: transform 0.1s, opacity 0.1s;
-  color: rgb(var(--v-theme-success));
 }
-.fc-tag-chip__confirm:hover { background: rgb(var(--v-theme-success), 0.14); }
+.fc-tag-chip__confirm:hover { opacity: 1; transform: scale(1.1); }
 .fc-tag-chip__confirm:focus-visible {
-  outline: 2px solid rgb(var(--v-theme-success)); outline-offset: 1px;
+  outline: 2px solid rgb(var(--v-theme-accent)); outline-offset: 1px;
 }
 </style>

frontend/src/components/settings/HeadsCard.vue

@@ -159,6 +159,42 @@
       </div>
     </div>
 
+    <!-- Presentation chrome auto-hide (#141) -->
+    <div class="fc-auto mt-6">
+      <div class="d-flex align-center mb-1" style="gap: 10px;">
+        <v-icon size="18" color="accent">mdi-image-off-outline</v-icon>
+        <span class="fc-section-h">Hide presentation chrome</span>
+        <v-switch
+          v-model="presentationEnabled" :loading="settingBusy" hide-details
+          density="compact" color="success" class="ml-auto"
+          @update:model-value="onTogglePresentation"
+        />
+      </div>
+      <p class="fc-muted text-body-2 mb-3">
+        Auto-hide banners and editor screenshots from the gallery once a head has
+        learned them (≥ {{ minPositives }} examples) and clears
+        {{ Math.round((presentationThresholdInput || 0) * 100) }}% confidence.
+        <code>wip</code> is never auto-hidden. If a hidden image also looks like
+        real content (≥ {{ Math.round((presentationConflictInput || 0) * 100) }}%
+        on a content tag), it's flagged in the Hidden view instead of buried.
+        Every auto-hide is reversible.
+      </p>
+      <div class="d-flex mb-3" style="gap: 12px;">
+        <v-text-field
+          v-model.number="presentationThresholdInput" label="Hide confidence"
+          type="number" min="0.5" max="0.999" step="0.01" density="compact"
+          hide-details style="max-width: 200px;" :disabled="settingBusy"
+          @change="onSavePresentation"
+        />
+        <v-text-field
+          v-model.number="presentationConflictInput" label="Flag if content ≥"
+          type="number" min="0" max="1" step="0.05" density="compact"
+          hide-details style="max-width: 200px;" :disabled="settingBusy"
+          @change="onSavePresentation"
+        />
+      </div>
+    </div>
+
     <!-- Performance / tuning -->
     <div v-if="metricsConcepts.length" class="mt-5">
       <div class="fc-section-h mb-1">How auto-apply is landing</div>
@@ -218,6 +254,11 @@ const autoStatus = ref(null)
 const metricsData = ref(null)
 let autoTimer = null
 
+// --- Presentation chrome auto-hide state (#141) ---
+const presentationEnabled = ref(true)
+const presentationThresholdInput = ref(0.90)
+const presentationConflictInput = ref(0.50)
+
 const autoRunning = computed(() => autoStatus.value?.running_id != null)
 const lastSweep = computed(() =>
   (autoStatus.value?.runs || []).find(r => r.status !== 'running') || null)
@@ -248,6 +289,9 @@ onMounted(async () => {
     autoEnabled.value = !!s.head_auto_apply_enabled
     autoPrecisionInput.value = s.head_auto_apply_precision ?? 0.97
     autoMinPosInput.value = s.head_auto_apply_min_positives ?? 30
+    presentationEnabled.value = s.presentation_auto_apply_enabled ?? true
+    presentationThresholdInput.value = s.presentation_auto_apply_threshold ?? 0.90
+    presentationConflictInput.value = s.presentation_conflict_threshold ?? 0.50
   } catch { /* non-fatal */ }
   await refresh()
   if (running.value) startPoll()
@@ -332,6 +376,32 @@ async function onSaveSettings() {
     settingBusy.value = false
   }
 }
+
+async function onTogglePresentation(val) {
+  settingBusy.value = true
+  try {
+    await mlSettings.patchSettings({ presentation_auto_apply_enabled: !!val })
+    toast({ text: val ? 'Chrome auto-hide on' : 'Chrome auto-hide off', type: 'success' })
+  } catch (e) {
+    presentationEnabled.value = !val   // revert the switch
+    toast({ text: `Could not update: ${e.message}`, type: 'error' })
+  } finally {
+    settingBusy.value = false
+  }
+}
+async function onSavePresentation() {
+  settingBusy.value = true
+  try {
+    await mlSettings.patchSettings({
+      presentation_auto_apply_threshold: Number(presentationThresholdInput.value),
+      presentation_conflict_threshold: Number(presentationConflictInput.value),
+    })
+  } catch (e) {
+    toast({ text: `Could not save: ${e.message}`, type: 'error' })
+  } finally {
+    settingBusy.value = false
+  }
+}
 function onPreview() { startSweep(true) }
 function onApplyNow() { startSweep(false) }
 async function startSweep(dryRun) {

frontend/src/stores/gallery.js

@@ -30,6 +30,9 @@ export const useGalleryStore = defineStore('gallery', () => {
     tag_or: [], tag_exclude: [],
     // Phase-2 faceted refine params.
     platform: null, untagged: false, no_artist: false,
+    // Reveal the presentation chrome (banner / editor screenshot) the gallery
+    // hides by default (milestone 141).
+    include_hidden: false,
     date_from: null, date_to: null,
     // Phase-3 visual similarity: when set, the gallery is in "similar mode" —
     // ranked by cosine distance to this image, bounded top-N, no cursor.
@@ -158,6 +161,7 @@ export const useGalleryStore = defineStore('gallery', () => {
     if (filter.value.platform) p.platform = filter.value.platform
     if (filter.value.untagged) p.untagged = '1'
     if (filter.value.no_artist) p.no_artist = '1'
+    if (filter.value.include_hidden) p.include_hidden = '1'
     if (filter.value.date_from) p.date_from = filter.value.date_from
     if (filter.value.date_to) p.date_to = filter.value.date_to
     return p
@@ -196,6 +200,7 @@ export const useGalleryStore = defineStore('gallery', () => {
       platform: q.platform || null,
       untagged: _truthy(q.untagged),
       no_artist: _truthy(q.no_artist),
+      include_hidden: _truthy(q.include_hidden),
       date_from: _parseDate(q.date_from),
       date_to: _parseDate(q.date_to),
       similar_to: _toId(q.similar_to),
@@ -284,7 +289,8 @@ export function cloneFilter(f) {
     tag_exclude: [...(f.tag_exclude || [])],
     artist_id: f.artist_id, media_type: f.media_type,
     sort: f.sort, platform: f.platform, untagged: f.untagged,
-    no_artist: f.no_artist, date_from: f.date_from, date_to: f.date_to,
+    no_artist: f.no_artist, include_hidden: f.include_hidden,
+    date_from: f.date_from, date_to: f.date_to,
     similar_to: f.similar_to,
   }
 }
@@ -301,6 +307,7 @@ export function filterToQuery(f) {
   if (f.platform) q.platform = f.platform
   if (f.untagged) q.untagged = '1'
   if (f.no_artist) q.no_artist = '1'
+  if (f.include_hidden) q.include_hidden = '1'
   if (f.date_from) q.date_from = f.date_from
   if (f.date_to) q.date_to = f.date_to
   if (f.similar_to) q.similar_to = String(f.similar_to)

frontend/src/views/GalleryView.vue

@@ -13,6 +13,7 @@
       <div class="fc-gallery-layout__main">
         <PostInfoHeader />
         <GalleryFilterBar v-if="store.filter.post_id == null" />
+        <HiddenReviewStrip />
         <EmptyState v-if="store.isEmpty" />
         <GalleryGrid v-else @open="openImage" />
       </div>
@@ -33,6 +34,7 @@ import { useGalleryStore } from '../stores/gallery.js'
 import { useModalStore } from '../stores/modal.js'
 import GalleryGrid from '../components/gallery/GalleryGrid.vue'
 import GalleryFilterBar from '../components/gallery/GalleryFilterBar.vue'
+import HiddenReviewStrip from '../components/gallery/HiddenReviewStrip.vue'
 import TimelineSidebar from '../components/gallery/TimelineSidebar.vue'
 import EmptyState from '../components/gallery/EmptyState.vue'
 import PostInfoHeader from '../components/gallery/PostInfoHeader.vue'

tests/test_api_ml_admin.py

@@ -81,6 +81,35 @@ async def test_detector_settings_defaults_patch_and_validation(client):
         "/api/ml/settings", json={"detector_max_regions": 0})).status_code == 400
 
 
+@pytest.mark.asyncio
+async def test_presentation_settings_defaults_patch_and_validation(client):
+    # #141: presentation-chrome auto-hide knobs (banner/editor auto-apply +
+    # the "also looks like content" conflict threshold) are exposed + editable.
+    body = await (await client.get("/api/ml/settings")).get_json()
+    assert body["presentation_auto_apply_enabled"] is True
+    assert body["presentation_auto_apply_threshold"] == 0.90
+    assert body["presentation_conflict_threshold"] == 0.50
+
+    ok = await client.patch("/api/ml/settings", json={
+        "presentation_auto_apply_enabled": False,
+        "presentation_auto_apply_threshold": 0.95,
+        "presentation_conflict_threshold": 0.4,
+    })
+    assert ok.status_code == 200
+    out = await ok.get_json()
+    assert out["presentation_auto_apply_enabled"] is False
+    assert out["presentation_auto_apply_threshold"] == 0.95
+    assert out["presentation_conflict_threshold"] == 0.4
+
+    # Auto-apply threshold below the floor + conflict cut above 1 are rejected.
+    assert (await client.patch(
+        "/api/ml/settings",
+        json={"presentation_auto_apply_threshold": 0.4})).status_code == 400
+    assert (await client.patch(
+        "/api/ml/settings",
+        json={"presentation_conflict_threshold": 1.5})).status_code == 400
+
+
 @pytest.mark.asyncio
 async def test_embedder_models_list(client):
     # #1203: the dropdown reads the supported-model list from the server.

tests/test_gallery_service.py

@@ -1,6 +1,7 @@
 from datetime import UTC, datetime, timedelta
 
 import pytest
+from sqlalchemy import select
 
 from backend.app.models import ImageRecord, Tag, TagKind
 from backend.app.models.tag import image_tag
@@ -73,6 +74,47 @@ async def test_scroll_returns_newest_first(db):
     assert page.images[0].created_at > page.images[-1].created_at
 
 
+async def _system_tag(db, name):
+    return (await db.execute(
+        select(Tag).where(Tag.is_system.is_(True), Tag.name == name)
+    )).scalar_one()
+
+
+@pytest.mark.asyncio
+async def test_scroll_hides_presentation_chrome_by_default(db):
+    # banner / editor screenshot (presentation system tags) are hidden from the
+    # default gallery; wip (also a system tag) is NOT — it's real, in-progress
+    # art (milestone 141). Seeded system tags survive the harness TRUNCATE.
+    imgs = await _seed_images(db, 3, sha_prefix="p")
+    banner = await _system_tag(db, "banner")
+    wip = await _system_tag(db, "wip")
+    await db.execute(image_tag.insert().values(
+        image_record_id=imgs[0].id, tag_id=banner.id, source="manual"))
+    await db.execute(image_tag.insert().values(
+        image_record_id=imgs[1].id, tag_id=wip.id, source="manual"))
+    await db.flush()
+    svc = GalleryService(db)
+
+    # Default: the banner image is hidden; the wip image + the plain image stay.
+    default_ids = {i.id for i in (await svc.scroll(cursor=None, limit=10)).images}
+    assert imgs[0].id not in default_ids      # banner hidden
+    assert imgs[1].id in default_ids          # wip visible
+    assert imgs[2].id in default_ids          # plain visible
+
+    # include_hidden surfaces the banner image (the Hidden view).
+    shown = {i.id for i in (
+        await svc.scroll(cursor=None, limit=10, include_hidden=True)
+    ).images}
+    assert imgs[0].id in shown
+
+    # Filtering explicitly FOR banner shows it (a view exclusively for a
+    # presentation tag suppresses the implicit hide).
+    only_banner = {i.id for i in (
+        await svc.scroll(cursor=None, limit=10, tag_ids=[banner.id])
+    ).images}
+    assert only_banner == {imgs[0].id}
+
+
 @pytest.mark.asyncio
 async def test_scroll_sorts_by_earliest_post_date(db):
     """posted_new/posted_old key off earliest_post_date (original publish across

tests/test_hidden_review.py

@@ -0,0 +1,89 @@
+"""Hidden-view review endpoints (#141): list flagged auto-hides + keep / un-hide."""
+import pytest
+from sqlalchemy import select
+
+from backend.app.models import (
+    ImageRecord,
+    PresentationReview,
+    Tag,
+    TagKind,
+    TagSuggestionRejection,
+)
+from backend.app.models.tag import image_tag
+
+pytestmark = pytest.mark.integration
+
+
+async def _setup_flag(db):
+    banner = (await db.execute(
+        select(Tag).where(Tag.is_system.is_(True), Tag.name == "banner")
+    )).scalar_one()
+    content = Tag(name="looksreal", kind=TagKind.general)
+    db.add(content)
+    img = ImageRecord(
+        path="/images/rv.jpg", sha256="rv" * 32, size_bytes=1, mime="image/jpeg",
+        width=1, height=1, origin="imported_filesystem",
+        integrity_status="unknown",
+    )
+    db.add(img)
+    await db.flush()
+    await db.execute(image_tag.insert().values(
+        image_record_id=img.id, tag_id=banner.id, source="presentation_auto"))
+    db.add(PresentationReview(
+        image_record_id=img.id, tag_id=banner.id,
+        conflict_tag_id=content.id, conflict_score=0.8,
+    ))
+    await db.commit()
+    return img, banner, content
+
+
+async def _source(db, image_id, tag_id):
+    return (await db.execute(
+        select(image_tag.c.source).where(
+            image_tag.c.image_record_id == image_id,
+            image_tag.c.tag_id == tag_id,
+        )
+    )).scalar_one_or_none()
+
+
+@pytest.mark.asyncio
+async def test_hidden_review_lists_flag(client, db):
+    img, banner, content = await _setup_flag(db)
+    body = await (await client.get("/api/gallery/hidden-review")).get_json()
+    assert len(body["items"]) == 1
+    it = body["items"][0]
+    assert it["image_id"] == img.id
+    assert it["tag_id"] == banner.id
+    assert it["conflict_tag_id"] == content.id
+    assert it["conflict_name"] == "looksreal"
+    assert it["conflict_score"] == 0.8
+    assert it["thumbnail_url"]
+
+
+@pytest.mark.asyncio
+async def test_hidden_review_keep_resolves_but_keeps_tag(client, db):
+    img, banner, _ = await _setup_flag(db)
+    resp = await client.post(
+        f"/api/gallery/hidden-review/{img.id}/{banner.id}/keep")
+    assert resp.status_code == 204
+    body = await (await client.get("/api/gallery/hidden-review")).get_json()
+    assert body["items"] == []                          # flag resolved
+    assert await _source(db, img.id, banner.id) == "presentation_auto"  # tag stays
+
+
+@pytest.mark.asyncio
+async def test_hidden_review_unhide_removes_tag_and_records_rejection(client, db):
+    img, banner, _ = await _setup_flag(db)
+    resp = await client.post(
+        f"/api/gallery/hidden-review/{img.id}/{banner.id}/unhide")
+    assert resp.status_code == 204
+    assert await _source(db, img.id, banner.id) is None   # back in the gallery
+    rej = (await db.execute(
+        select(TagSuggestionRejection).where(
+            TagSuggestionRejection.image_record_id == img.id,
+            TagSuggestionRejection.tag_id == banner.id,
+        )
+    )).scalar_one_or_none()
+    assert rej is not None                                # head learns it misfired
+    body = await (await client.get("/api/gallery/hidden-review")).get_json()
+    assert body["items"] == []

tests/test_presentation_auto_apply.py

@@ -0,0 +1,152 @@
+"""Presentation-chrome auto-hide sweep (#141). numpy-only (no sklearn), so the
+apply + guard logic is tested directly via the sync session."""
+import pytest
+from sqlalchemy import select
+
+from backend.app.models import (
+    HeadAutoApplyRun,
+    ImageRecord,
+    MLSettings,
+    PresentationReview,
+    Tag,
+    TagHead,
+    TagKind,
+)
+from backend.app.models.tag import image_tag
+from backend.app.services.ml.heads import (
+    auto_apply_sweep,
+    presentation_auto_apply_sweep,
+)
+
+pytestmark = pytest.mark.integration
+
+
+def _emb(slot: int) -> list[float]:
+    v = [0.0] * 1152
+    v[slot] = 3.0
+    return v
+
+
+def _img(db, sha: str, emb) -> ImageRecord:
+    img = ImageRecord(
+        path=f"/images/{sha}.jpg", sha256=sha, size_bytes=1, mime="image/jpeg",
+        width=1, height=1, origin="imported_filesystem",
+        integrity_status="unknown", siglip_embedding=emb,
+    )
+    db.add(img)
+    db.flush()
+    return img
+
+
+def _head(db, tag_id: int, slot: int, *, weight=1.0):
+    # weight 3.0 → score sigmoid(3)=0.95 clears the 0.90 presentation floor;
+    # weight 1.0 → sigmoid(1)=0.73 clears the 0.50 conflict floor.
+    s = db.execute(select(MLSettings).where(MLSettings.id == 1)).scalar_one()
+    w = [0.0] * 1152
+    w[slot] = weight
+    db.add(TagHead(
+        tag_id=tag_id, embedding_version=s.embedder_model_version,
+        weights=w, bias=0.0, suggest_threshold=0.5, auto_apply_threshold=0.5,
+        n_pos=60, n_neg=90, ap=0.9, precision_cv=0.98, recall=0.7,
+    ))
+
+
+def _system_tag(db, name):
+    return db.execute(
+        select(Tag).where(Tag.is_system.is_(True), Tag.name == name)
+    ).scalar_one()
+
+
+def _source(db, image_id, tag_id):
+    return db.execute(
+        select(image_tag.c.source)
+        .where(image_tag.c.image_record_id == image_id)
+        .where(image_tag.c.tag_id == tag_id)
+    ).scalar_one_or_none()
+
+
+def test_presentation_sweep_hides_chrome(db_sync):
+    banner = _system_tag(db_sync, "banner")
+    _head(db_sync, banner.id, 0, weight=3.0)
+    img = _img(db_sync, "a" * 64, _emb(0))
+    db_sync.commit()
+    res = presentation_auto_apply_sweep(db_sync)
+    assert res["n_applied"] == 1
+    assert _source(db_sync, img.id, banner.id) == "presentation_auto"
+
+
+def test_presentation_sweep_hard_skips_valued_image(db_sync):
+    # An image the operator already tagged with a content tag is never auto-hidden.
+    banner = _system_tag(db_sync, "banner")
+    _head(db_sync, banner.id, 0, weight=3.0)
+    content = Tag(name="mychar", kind=TagKind.character)
+    db_sync.add(content)
+    db_sync.flush()
+    img = _img(db_sync, "b" * 64, _emb(0))
+    db_sync.execute(image_tag.insert().values(
+        image_record_id=img.id, tag_id=content.id, source="manual"))
+    db_sync.commit()
+    res = presentation_auto_apply_sweep(db_sync)
+    assert res["n_applied"] == 0
+    assert _source(db_sync, img.id, banner.id) is None
+
+
+def test_presentation_sweep_flags_conflict(db_sync):
+    # Matches banner AND scores high on a content head → hidden but flagged with
+    # that content tag as the conflict.
+    banner = _system_tag(db_sync, "banner")
+    _head(db_sync, banner.id, 0, weight=3.0)
+    content = Tag(name="looksreal", kind=TagKind.general)
+    db_sync.add(content)
+    db_sync.flush()
+    _head(db_sync, content.id, 0, weight=1.0)     # content head also fires
+    img = _img(db_sync, "c" * 64, _emb(0))
+    db_sync.commit()
+    res = presentation_auto_apply_sweep(db_sync)
+    assert res["n_applied"] == 1
+    assert res["n_flagged"] == 1
+    assert _source(db_sync, img.id, banner.id) == "presentation_auto"
+    flag = db_sync.execute(
+        select(PresentationReview).where(
+            PresentationReview.image_record_id == img.id,
+            PresentationReview.tag_id == banner.id,
+        )
+    ).scalar_one()
+    assert flag.conflict_tag_id == content.id
+    assert flag.conflict_score >= 0.5
+
+
+def test_presentation_sweep_disabled_is_noop(db_sync):
+    s = db_sync.execute(select(MLSettings).where(MLSettings.id == 1)).scalar_one()
+    s.presentation_auto_apply_enabled = False
+    banner = _system_tag(db_sync, "banner")
+    _head(db_sync, banner.id, 0, weight=3.0)
+    img = _img(db_sync, "d" * 64, _emb(0))
+    db_sync.commit()
+    res = presentation_auto_apply_sweep(db_sync)
+    assert res["n_applied"] == 0
+    assert _source(db_sync, img.id, banner.id) is None
+
+
+def test_presentation_sweep_ignores_wip(db_sync):
+    # wip is a system tag but NOT presentation chrome → never auto-applied.
+    wip = _system_tag(db_sync, "wip")
+    _head(db_sync, wip.id, 0, weight=3.0)
+    img = _img(db_sync, "e" * 64, _emb(0))
+    db_sync.commit()
+    res = presentation_auto_apply_sweep(db_sync)
+    assert res["n_applied"] == 0
+    assert _source(db_sync, img.id, wip.id) is None
+
+
+def test_content_sweep_never_fires_system_tags(db_sync):
+    # A graduated banner (system) head must NOT auto-apply via the content path.
+    banner = _system_tag(db_sync, "banner")
+    _head(db_sync, banner.id, 0, weight=3.0)
+    img = _img(db_sync, "f" * 64, _emb(0))
+    run = HeadAutoApplyRun(dry_run=False, params={}, status="running")
+    db_sync.add(run)
+    db_sync.flush()
+    db_sync.commit()
+    auto_apply_sweep(db_sync, run, dry_run=False)
+    assert _source(db_sync, img.id, banner.id) is None

tests/test_presentation_scheduled.py

@@ -0,0 +1,98 @@
+"""Scheduled presentation tasks (#141): the daily auto-hide sweep wrapper +
+resolved-flag retention. The task opens its own session via
+_sync_session_factory, monkeypatched here to run against the test's db_sync."""
+from datetime import UTC, datetime, timedelta
+
+import pytest
+from sqlalchemy import select
+
+from backend.app.models import (
+    ImageRecord,
+    MLSettings,
+    PresentationReview,
+    Tag,
+    TagHead,
+)
+from backend.app.tasks.ml import (
+    prune_presentation_reviews,
+    scheduled_presentation_auto_apply,
+)
+
+pytestmark = pytest.mark.integration
+
+
+class _Ctx:
+    def __init__(self, s):
+        self.s = s
+
+    def __enter__(self):
+        return self.s
+
+    def __exit__(self, *a):
+        return False
+
+
+def _sf(db_sync):
+    class _SM:
+        def __call__(self):
+            return _Ctx(db_sync)
+
+    return _SM()
+
+
+def _img(db, sha, emb=None):
+    img = ImageRecord(
+        path=f"/images/{sha}.jpg", sha256=sha * 32, size_bytes=1, mime="image/jpeg",
+        width=1, height=1, origin="imported_filesystem",
+        integrity_status="unknown", siglip_embedding=emb,
+    )
+    db.add(img)
+    db.flush()
+    return img
+
+
+def test_scheduled_presentation_sweep_hides_chrome(db_sync, monkeypatch):
+    monkeypatch.setattr(
+        "backend.app.tasks.ml._sync_session_factory", lambda: _sf(db_sync)
+    )
+    banner = db_sync.execute(
+        select(Tag).where(Tag.is_system.is_(True), Tag.name == "banner")
+    ).scalar_one()
+    s = db_sync.execute(select(MLSettings).where(MLSettings.id == 1)).scalar_one()
+    w = [0.0] * 1152
+    w[0] = 3.0
+    db_sync.add(TagHead(
+        tag_id=banner.id, embedding_version=s.embedder_model_version,
+        weights=w, bias=0.0, suggest_threshold=0.5, auto_apply_threshold=0.5,
+        n_pos=60, n_neg=90, ap=0.9, precision_cv=0.98, recall=0.7,
+    ))
+    emb = [0.0] * 1152
+    emb[0] = 3.0
+    _img(db_sync, "sc", emb)
+    db_sync.commit()
+    assert "applied=1" in scheduled_presentation_auto_apply()
+
+
+def test_prune_presentation_reviews_drops_old_resolved(db_sync, monkeypatch):
+    monkeypatch.setattr(
+        "backend.app.tasks.ml._sync_session_factory", lambda: _sf(db_sync)
+    )
+    banner = db_sync.execute(
+        select(Tag).where(Tag.is_system.is_(True), Tag.name == "banner")
+    ).scalar_one()
+    a, b, c = _img(db_sync, "p1"), _img(db_sync, "p2"), _img(db_sync, "p3")
+    old = datetime.now(UTC) - timedelta(days=40)
+    recent = datetime.now(UTC) - timedelta(days=1)
+    # old resolved → pruned; recent resolved → kept; unresolved → kept.
+    db_sync.add(PresentationReview(
+        image_record_id=a.id, tag_id=banner.id, conflict_score=0.7, resolved_at=old))
+    db_sync.add(PresentationReview(
+        image_record_id=b.id, tag_id=banner.id, conflict_score=0.7, resolved_at=recent))
+    db_sync.add(PresentationReview(
+        image_record_id=c.id, tag_id=banner.id, conflict_score=0.7))
+    db_sync.commit()
+    assert prune_presentation_reviews() == "pruned=1"
+    remaining = db_sync.execute(
+        select(PresentationReview.image_record_id)
+    ).scalars().all()
+    assert set(remaining) == {b.id, c.id}