Point desktop updates at the Gitea release feed

The updater now resolves the newest non-draft desktop-v* release through the
Gitea API at check time (J621_UPDATE_REPO, lowercase because the API path is
case-sensitive), picks the platform's latest*.yml asset and uses that release
as a generic electron-updater feed; J621_UPDATE_URL still overrides
everything. Verified against the live API: release picked, yml fetched,
artifact HEAD 200.

electron-builder's publish.url is now metadata only (still needed so the
build emits latest*.yml). Docs updated: CD release assets are the feed, the
website /desktop/ feed only matters for installs before 0.1.2.

.gitea/workflows/cd.yml

@@ -1,15 +1,18 @@
 # J621 CD — manual release workflow (Actions tab -> "Run workflow").
 #
-# One dispatch does everything:
+# One dispatch does everything; each half can be skipped with the `images`
+# and `desktop` inputs:
 #   * builds and pushes the backend + frontend images (multi-arch, :latest
 #     and :<short-sha>, GIT_HASH baked in for the version pill),
 #   * builds the desktop packages and attaches them (plus the update
 #     metadata) to the Gitea release tagged `desktop-v<package.json version>`.
 #
-# The live update feed (deploy/data/desktop, served by the frontend nginx at
-# /desktop/) is not touched here: it is runtime state on the deploy host and
-# is still published with `deploy/push_desktop.sh --no-build` from a machine
-# that can reach it.
+# The desktop build also attaches the update metadata (latest*.yml) to the
+# release; that is the desktop updater's feed, resolved through the Gitea API
+# at check time (see desktop/README.md). The older website feed
+# (deploy/data/desktop, served at /desktop/) is runtime state on the deploy
+# host and only needed for installs before 0.1.2; it is refreshed with
+# `deploy/push_desktop.sh` from a machine that can reach the deploy host.
 #
 # Registry login uses a repo PAT with the minimal write:package scope (the
 # Gitea registry rejects the automatic job token, go-gitea/gitea#23642);
@@ -21,6 +24,14 @@ name: CD
 on:
   workflow_dispatch:
     inputs:
+      images:
+        description: Build and push the Docker images
+        required: false
+        default: "true"
+      desktop:
+        description: Build the desktop release
+        required: false
+        default: "true"
       platforms:
         description: Image platforms (comma separated)
         required: false
@@ -37,6 +48,7 @@ concurrency:
 jobs:
   images:
     name: Build & push images
+    if: ${{ inputs.images != 'false' }}
     runs-on: ubuntu-latest
     # The Gitea container registry does not accept the automatic job token
     # (go-gitea/gitea#23642 is still open), so the push uses a repo PAT with
@@ -73,6 +85,7 @@ jobs:
 
   desktop:
     name: Desktop release
+    if: ${{ inputs.desktop != 'false' }}
     runs-on: ubuntu-latest
     # Creating the release and uploading its assets uses the automatic job
     # token, so it needs write access to the repository's releases.
@@ -90,7 +103,12 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y --no-install-recommends fakeroot libarchive-tools
           if [ "${{ inputs.windows }}" = "true" ]; then
-            sudo apt-get install -y --no-install-recommends wine
+            # electron-builder runs the 32-bit NSIS installer under wine to
+            # build the uninstaller: that needs a virtual display (Xvfb) and
+            # 32-bit wine libraries.
+            sudo dpkg --add-architecture i386
+            sudo apt-get update
+            sudo apt-get install -y --no-install-recommends xvfb wine wine32:i386
           fi
 
       - name: Install frontend + desktop dependencies
@@ -99,9 +117,12 @@ jobs:
           npm --prefix desktop ci --no-audit --no-fund
 
       - name: Build desktop packages
+        env:
+          # Keep wine from trying to fetch Gecko/Mono on first run.
+          WINEDLLOVERRIDES: mscoree,mshtml=
         run: |
           if [ "${{ inputs.windows }}" = "true" ]; then
-            ./deploy/build_desktop.sh --all
+            xvfb-run -a ./deploy/build_desktop.sh --all
           else
             ./deploy/build_desktop.sh --linux
           fi
@@ -143,8 +164,7 @@ jobs:
           fi
 
           EXISTING="$(curl -sf -H "$AUTH" "$API/releases/$RELEASE_ID/assets" \
-            | python3 -c 'import json,sys; print("\n".join(a["name"] for a in json.load(sys.stdin)))' \
-            || true)"
+            || echo '[]')"
           for FILE in desktop/release/*"$VERSION"*.deb \
                       desktop/release/*"$VERSION"*.pkg.tar.zst \
                       desktop/release/latest-linux.yml \
@@ -153,11 +173,25 @@ jobs:
                       desktop/release/*"$VERSION"*.exe.blockmap; do
             [ -e "$FILE" ] || continue
             NAME="$(basename "$FILE")"
-            case "$EXISTING" in
-              *"$NAME"*) echo "    already attached: $NAME"; continue ;;
-            esac
-            echo "    attaching $NAME"
+            # Replace the asset when it is already there: latest*.yml must
+            # reference the installers built by *this* run (NSIS builds are
+            # not bit-reproducible), so old copies are deleted first.
+            ASSET_ID="$(printf '%s' "$EXISTING" | python3 -c '
+          import json, sys
+          name = sys.argv[1]
+          print(next((str(a["id"]) for a in json.load(sys.stdin) if a["name"] == name), ""))
+          ' "$NAME")"
+            if [ -n "$ASSET_ID" ]; then
+              echo "    replacing $NAME"
+              curl -sf -X DELETE -H "$AUTH" \
+                "$API/releases/$RELEASE_ID/assets/$ASSET_ID" >/dev/null
+            else
+              echo "    attaching $NAME"
+            fi
+            # Names like "J621 Setup 0.1.1.exe" contain spaces: encode them
+            # or curl refuses the URL (exit 3).
+            ENCODED="$(python3 -c 'import sys, urllib.parse; print(urllib.parse.quote(sys.argv[1]))' "$NAME")"
             curl -sf -X POST -H "$AUTH" -H "Content-Type: application/octet-stream" \
-              --data-binary @"$FILE" "$API/releases/$RELEASE_ID/assets?name=$NAME" >/dev/null
+              --data-binary @"$FILE" "$API/releases/$RELEASE_ID/assets?name=$ENCODED" >/dev/null
           done
           echo "Release: ${{ github.server_url }}/${{ github.repository }}/releases/tag/$TAG"

AGENTS.md

@@ -56,9 +56,10 @@ Project constraints (do not regress):
   `desktop-v<version>`). Jobs run on the user-scoped runners: `ubuntu-latest`
   on nitro-ci, `desktop` on msi-mortar-ci. Do not add actions/cache
   (`cache: pip`/`npm`) to these workflows: Gitea's cache service hangs the job
-  on restore/save. The live desktop update feed (deploy/data/desktop) is still
-  published with `deploy/push_desktop.sh --no-build` from a machine with SSH
-  to the deploy host — CI has no key for that.
+  on restore/save. Desktop updates read the release assets (latest*.yml) from
+  the Gitea API at check time; the older website feed (deploy/data/desktop)
+  only matters for installs before 0.1.2 and is refreshed with
+  `deploy/push_desktop.sh` from a machine with SSH to the deploy host.
 - Security/permission tests live in backend/apps/core/tests and need a
   one-time grant: GRANT ALL ON `test_j621`.* TO 'j621'@'%';
 

ROADMAP.md

@@ -20,6 +20,13 @@ they land.
   - [x] Tag cloud in the sidebar (click to search, hidden from guests for
         blacklisted items)
   - [x] Status filter (matched / not_found / deleted / custom / unknown)
+- [x] **Cacheable media serving**
+  - [x] Stable signed URLs (7 d TTL, 24 h rotation) plus a `v=<md5>` cache
+        buster, so replacing a file under the same J-ID invalidates it
+  - [x] ETag/Last-Modified and a private `Cache-Control` (immutable for
+        versioned media), conditional 304s
+  - [x] Real 480 px image thumbnails (cached by MD5) instead of serving
+        full-size originals through the thumbnail endpoint
 
 - [x] **Random image** endpoint and page: `GET /api/random/` (aliases
       `/random`, `/random/`) with `rating=s,q,e` filters; fastfetch mode
@@ -104,12 +111,16 @@ Files now stage first and are resolved before entering the library.
         shell indicator; rate-limited runs retry with backoff
   - [x] Perceptual-hash comparison against the library, loaded once per batch
   - [x] IQDB candidates stored with one batched enrichment request
+  - [x] Indexed uploads are announced through a bounded per-run feed and the
+        staged row is deleted; nothing persists on the board to dismiss
 - [x] **Upload UI**
-  - [x] Three-column board: Pending & Unmatched / Visual Similarity Detected /
-        Auto-uploaded & Indexed, private per user (staff included)
+  - [x] Four-column board: Pending & Unmatched / Visual Similarity Detected /
+        Auto-uploaded & Indexed (session feed) / Failed, private per user
+        (staff included)
   - [x] Metadata modal (link to e621 post, IQDB candidates, custom metadata)
   - [x] Per-file progress plus background pipeline status
-  - [x] Bulk actions: bulk rate, discard all (pending/visual), dismiss all
+  - [x] Bulk actions: bulk rate and discard all (chunked past the API's
+        1000-id cap)
 
 ## 4. Staff tools
 

backend/apps/core/tests/test_security.py

@@ -36,6 +36,7 @@ from apps.library.models import (
     TempUpload,
 )
 from apps.library.services import MEDIA_FILE_SALT
+from apps.library.signing_urls import sign_payload
 
 User = get_user_model()
 
@@ -122,21 +123,15 @@ class SecurityTestCase(TestCase):
         return item
 
     def old_signature(self, item, action="raw", age=3 * 86400):
-        """A valid signature minted `age` seconds ago."""
-        real_time = signing.time
-
-        class Backdated:
-            def time(self):
-                return real_time.time() - age
-
-        try:
-            signing.time = Backdated()
-            return signing.dumps(
-                {"item": item.id, "user": self.users["sec-uploader"].id, "action": action},
-                salt=MEDIA_FILE_SALT,
-            )
-        finally:
-            signing.time = real_time
+        """A signed media URL whose expiry is `age` seconds in the past."""
+        return signing.Signer(salt=MEDIA_FILE_SALT).sign_object(
+            {
+                "item": item.id,
+                "user": self.users["sec-uploader"].id,
+                "action": action,
+                "exp": int(time.time()) - age,
+            }
+        )
 
 
 class GuestVisibilityTests(SecurityTestCase):
@@ -183,9 +178,9 @@ class GuestVisibilityTests(SecurityTestCase):
     def test_authenticated_users_and_signed_urls_see_protected_items(self):
         uploader = self.client_for("sec-uploader")
         self.assertEqual(uploader.get(f"/api/files/J-{self.hidden.id}/").status_code, 200)
-        signed = signing.dumps(
+        signed = sign_payload(
             {"item": self.hidden.id, "user": self.users["sec-uploader"].id, "action": "raw"},
-            salt=MEDIA_FILE_SALT,
+            MEDIA_FILE_SALT,
         )
         self.assertEqual(
             self.guest.get(f"/api/files/J-{self.hidden.id}/raw/?sig={signed}").status_code,
@@ -193,9 +188,9 @@ class GuestVisibilityTests(SecurityTestCase):
         )
 
     def test_signature_integrity(self):
-        signed = signing.dumps(
+        signed = sign_payload(
             {"item": self.hidden.id, "user": self.users["sec-uploader"].id, "action": "raw"},
-            salt=MEDIA_FILE_SALT,
+            MEDIA_FILE_SALT,
         )
         raw = f"/api/files/J-{self.hidden.id}/raw/"
         thumbnail = f"/api/files/J-{self.hidden.id}/thumbnail/"
@@ -203,10 +198,29 @@ class GuestVisibilityTests(SecurityTestCase):
         self.assertEqual(self.guest.get(f"{raw}?sig={signed[:-4]}AAAA").status_code, 404)
         # Valid signature, wrong action.
         self.assertEqual(self.guest.get(f"{thumbnail}?sig={signed}").status_code, 404)
-        # Expired signature (minted three days ago).
+        # Expired signature (expiry three days ago).
         expired = self.old_signature(self.hidden)
         self.assertEqual(self.guest.get(f"{raw}?sig={expired}").status_code, 404)
 
+    def test_signed_media_urls_are_stable_and_versioned(self):
+        """The same item must keep the same URL across responses.
+
+        A per-second signature made browsers re-download every image on every
+        poll; the MD5 version parameter busts caches only when the file itself
+        changes (the optimize flow rewrites files under the same J-ID).
+        """
+        item = self.visible
+        first = services.signed_media_url(item, self.users["sec-uploader"])
+        time.sleep(1.1)
+        second = services.signed_media_url(item, self.users["sec-uploader"])
+        self.assertEqual(first, second)
+        self.assertIn(f"v={item.md5}", first)
+        MediaItem.objects.filter(pk=item.pk).update(md5="b" * 32)
+        item.refresh_from_db()
+        self.assertNotEqual(
+            services.signed_media_url(item, self.users["sec-uploader"]), first
+        )
+
 
 class RoleBoundaryTests(SecurityTestCase):
     def test_non_uploader_is_read_only(self):
@@ -451,9 +465,9 @@ class ThrottleTests(SecurityTestCase):
             md5=hashlib.md5(b"throttle-temp").hexdigest(),
             size=6,
         )
-        signature = signing.dumps(
+        signature = sign_payload(
             {"temp": str(temp.id), "user": self.users["sec-uploader"].id},
-            salt=services.UPLOAD_FILE_SALT,
+            services.UPLOAD_FILE_SALT,
         )
         url = f"/api/uploads/{temp.id}/file/?sig={signature}"
         codes = {self.guest.get(url).status_code for _ in range(150)}

backend/apps/library/migrations/0012_uploadrun_recent_completions.py

@@ -0,0 +1,34 @@
+# Generated by Django 6.1.1 on 2026-09-23
+
+from django.db import migrations, models
+
+
+def purge_completed_uploads(apps, schema_editor):
+    """Completed staged uploads are notifications, not records.
+
+    The board used to keep every auto-uploaded/indexed row until it was
+    dismissed by hand, so they accumulated without bound (and bulk dismissal
+    is capped at 1000 ids). Completions now live in a small per-run feed, so
+    the old rows are removed here.
+    """
+    TempUpload = apps.get_model("library", "TempUpload")
+    for temp in TempUpload.objects.filter(status="completed").iterator():
+        if temp.file:
+            temp.file.delete(save=False)
+        temp.delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("library", "0011_upload_pipeline"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="uploadrun",
+            name="recent_completions",
+            field=models.JSONField(blank=True, default=list),
+        ),
+        migrations.RunPython(purge_completed_uploads, migrations.RunPython.noop),
+    ]

backend/apps/library/models.py

@@ -229,6 +229,11 @@ class UploadRun(models.Model):
     matched = models.IntegerField(default=0)
     failed = models.IntegerField(default=0)
     error = models.TextField(blank=True, default="")
+    # Rolling feed of recent completions for the upload board. Completed
+    # staged uploads are deleted as soon as they are indexed; this only tells
+    # the live page "filename -> J-x" while it watches. Bounded, never
+    # dismissed, and ignored by fresh page loads.
+    recent_completions = models.JSONField(default=list, blank=True)
     started_at = models.DateTimeField(null=True, blank=True)
     updated_at = models.DateTimeField(auto_now=True)
 

backend/apps/library/serializers.py

@@ -3,7 +3,6 @@ from datetime import timedelta
 from pathlib import Path
 
 from django.conf import settings
-from django.core import signing
 from rest_framework import serializers
 
 from .models import (
@@ -20,6 +19,7 @@ from .services import (
     VIDEO_EXTENSIONS,
     signed_media_url,
 )
+from .signing_urls import sign_payload
 
 
 class MediaLocationSerializer(serializers.ModelSerializer):
@@ -150,6 +150,7 @@ class TempUploadSerializer(serializers.ModelSerializer):
     iqdb_checked = serializers.SerializerMethodField()
     processing = serializers.SerializerMethodField()
     similar_count = serializers.SerializerMethodField()
+    visual_matches = serializers.SerializerMethodField()
 
     class Meta:
         model = TempUpload
@@ -199,9 +200,9 @@ class TempUploadSerializer(serializers.ModelSerializer):
         user = self._request_user()
         if user is None:
             return None
-        signature = signing.dumps(
+        signature = sign_payload(
             {"temp": str(obj.id), "user": user.id},
-            salt=UPLOAD_FILE_SALT,
+            UPLOAD_FILE_SALT,
         )
         url = f"/api/uploads/{obj.id}/file/?sig={signature}"
         request = self.context.get("request")
@@ -242,6 +243,57 @@ class TempUploadSerializer(serializers.ModelSerializer):
     def get_similar_count(self, obj):
         return len(obj.iqdb_data or []) + len(obj.visual_matches or [])
 
+    @staticmethod
+    def _visual_item_id(entry):
+        if not isinstance(entry, dict):
+            return None
+        item_id = entry.get("item_id")
+        if item_id is None:
+            j_id = str(entry.get("j_id") or "")
+            if j_id.upper().startswith("J-"):
+                j_id = j_id[2:]
+            item_id = j_id if j_id.isdigit() else None
+        try:
+            return int(item_id)
+        except (TypeError, ValueError):
+            return None
+
+    def get_visual_matches(self, obj):
+        """Rebuild match rows with fresh signed thumbnail URLs.
+
+        Storing the signed URL meant it aged out (or came from an older
+        signing scheme) and the "Already in your library" grid showed broken
+        tiles. The stored rows only carry the item reference now.
+        """
+        entries = obj.visual_matches or []
+        if not entries:
+            return entries
+        wanted = {}
+        for entry in entries:
+            item_id = self._visual_item_id(entry)
+            if item_id is not None:
+                wanted[item_id] = None
+        items = MediaItem.objects.in_bulk(list(wanted))
+        user = self._request_user()
+        request = self.context.get("request")
+        matches = []
+        for entry in entries:
+            item_id = self._visual_item_id(entry)
+            item = items.get(item_id) if item_id is not None else None
+            if item is None:
+                continue
+            matches.append(
+                {
+                    "j_id": f"J-{item.id}",
+                    "filename": entry.get("filename") or item.md5,
+                    "similarity": entry.get("similarity"),
+                    "thumbnail_url": signed_media_url(
+                        item, user, "thumbnail", request=request
+                    ),
+                }
+            )
+        return matches
+
 
 class TempUploadListSerializer(TempUploadSerializer):
     """Compact staged-upload row for the board and the status polling.
@@ -339,9 +391,9 @@ class SimilarityCheckSerializer(serializers.ModelSerializer):
         user = self._request_user()
         if user is None or not obj.file:
             return None
-        signature = signing.dumps(
+        signature = sign_payload(
             {"check": str(obj.id), "user": user.id},
-            salt=UPLOAD_FILE_SALT,
+            UPLOAD_FILE_SALT,
         )
         url = f"/api/similarity/{obj.id}/file/?sig={signature}"
         request = self.context.get("request")

backend/apps/library/services.py

@@ -6,16 +6,21 @@ import os
 import re
 import shutil
 import subprocess
+import uuid
+from datetime import datetime, timezone
 from pathlib import Path
+from urllib.parse import urlencode
 
 import imagehash
 from django.conf import settings
-from django.core import signing
 from django.http import FileResponse, Http404, HttpResponse
+from django.utils.cache import get_conditional_response
+from django.utils.http import http_date
 from django.utils.text import get_valid_filename
-from PIL import Image
+from PIL import Image, ImageOps
 
 from .models import MediaItem, MediaLocation
+from .signing_urls import sign_payload
 
 logger = logging.getLogger(__name__)
 
@@ -37,6 +42,11 @@ UPLOAD_FILE_SALT = "j621.upload-file"
 MEDIA_FILE_SALT = "j621.media-file"
 CHUNK_SIZE = 1024 * 1024
 RANGE_RE = re.compile(r"bytes=(\d*)-(\d*)$")
+# Versioned media URLs are immutable, so they may sit in the browser cache for
+# as long as the signature is guaranteed to stay valid (7 days).
+MEDIA_CACHE_SECONDS = 6 * 86400
+# Staged uploads and similarity files can be deleted at any moment.
+TEMP_CACHE_SECONDS = 3600
 
 
 def compute_md5(path):
@@ -78,14 +88,24 @@ def signed_media_url(item, user, action="raw", request=None):
 
     With a ``request`` the URL is absolute, so the SPA also works when it is
     served from a different origin; without one it stays relative.
+
+    The ``v`` parameter is the item's MD5: it busts the browser cache exactly
+    when the file is replaced (the optimize flow rewrites files under the same
+    J-ID), which is what lets the URL be cached for days instead of re-minted
+    on every response.
     """
     path = f"/api/files/J-{item.id}/{action}/"
+    params = {}
     if user is not None and getattr(user, "is_authenticated", False):
-        signature = signing.dumps(
-            {"item": item.id, "user": user.id, "action": action},
-            salt=MEDIA_FILE_SALT,
-        )
-        path = f"{path}?sig={signature}"
+        params = {
+            "v": item.md5,
+            "sig": sign_payload(
+                {"item": item.id, "user": user.id, "action": action},
+                MEDIA_FILE_SALT,
+            ),
+        }
+    if params:
+        path = f"{path}?{urlencode(params)}"
     if request is None:
         return path
     return request.build_absolute_uri(path)
@@ -207,12 +227,36 @@ class RangeFileWrapper:
         self.file.close()
 
 
-def serve_file(request, path, download=False):
-    """Serve a file with HTTP range support (needed for video seeking)."""
+def _apply_cache_headers(response, cache_control, etag, mtime):
+    response["Cache-Control"] = cache_control
+    response["ETag"] = etag
+    response["Last-Modified"] = http_date(mtime)
+    return response
+
+
+def serve_file(request, path, download=False, *, max_age=TEMP_CACHE_SECONDS, immutable=False):
+    """Serve a file with HTTP range support (needed for video seeking).
+
+    Responses carry validators (ETag/Last-Modified) and a private
+    ``Cache-Control`` so browsers reuse media instead of re-downloading it on
+    every SPA poll. ``max_age``/``immutable`` are chosen by the caller: versioned
+    library media can be cached hard, staged files only briefly.
+    """
     path = Path(path)
     if not path.is_file():
         raise Http404
-    size = path.stat().st_size
+    stat = path.stat()
+    size = stat.st_size
+    etag = f'W/"{size:x}-{stat.st_mtime_ns:x}"'
+    last_modified = datetime.fromtimestamp(stat.st_mtime, tz=timezone.utc)
+    conditional = get_conditional_response(
+        request, etag=etag, last_modified=last_modified
+    )
+    if conditional is not None:
+        return conditional
+    cache_control = f"private, max-age={int(max_age)}"
+    if immutable:
+        cache_control += ", immutable"
     content_type = mimetypes.guess_type(str(path))[0] or "application/octet-stream"
     range_header = request.headers.get("Range", "").strip()
     if range_header:
@@ -240,7 +284,9 @@ def serve_file(request, path, download=False):
             response["Content-Length"] = str(length)
             response["Content-Range"] = f"bytes {start}-{end}/{size}"
             response["Accept-Ranges"] = "bytes"
-            return response
+            return _apply_cache_headers(
+                response, cache_control, etag, stat.st_mtime
+            )
     response = FileResponse(
         open(path, "rb"),
         content_type=content_type,
@@ -248,7 +294,7 @@ def serve_file(request, path, download=False):
         filename=path.name,
     )
     response["Accept-Ranges"] = "bytes"
-    return response
+    return _apply_cache_headers(response, cache_control, etag, stat.st_mtime)
 
 
 class DownloadCancelled(Exception):
@@ -436,15 +482,38 @@ def sanitize_iqdb_results(results):
     return cleaned
 
 
+def _thumbnail_is_fresh(target, path):
+    """True when the cached thumbnail exists and is at least as new as source."""
+    try:
+        stat = target.stat()
+        if stat.st_size <= 0:
+            return False
+        return stat.st_mtime >= os.path.getmtime(path)
+    except OSError:
+        return False
+
+
+def _thumbs_dir():
+    thumbs_dir = Path(settings.MEDIA_ROOT) / "thumbs"
+    thumbs_dir.mkdir(parents=True, exist_ok=True)
+    return thumbs_dir
+
+
 def generate_video_thumbnail(md5, path):
     """Extract a JPEG thumbnail from a video, cached under MEDIA_ROOT/thumbs."""
     if not shutil.which("ffmpeg"):
         return None
-    thumbs_dir = Path(settings.MEDIA_ROOT) / "thumbs"
-    thumbs_dir.mkdir(parents=True, exist_ok=True)
+    try:
+        thumbs_dir = _thumbs_dir()
+    except OSError:
+        logger.exception("Could not create the thumbnail folder")
+        return None
     target = thumbs_dir / f"{md5}.jpg"
-    if target.exists() and target.stat().st_mtime >= os.path.getmtime(path):
+    if _thumbnail_is_fresh(target, path):
         return target
+    # Write beside the target and move it into place, so a concurrent request
+    # can never read a half-written JPEG.
+    temp = thumbs_dir / f".{md5}.{uuid.uuid4().hex}.part.jpg"
     command = [
         "ffmpeg",
         "-y",
@@ -458,10 +527,63 @@ def generate_video_thumbnail(md5, path):
         "scale=480:-2",
         "-loglevel",
         "error",
-        str(target),
+        str(temp),
     ]
     try:
         subprocess.run(command, check=True, capture_output=True, timeout=60)
+        os.replace(temp, target)
     except (subprocess.SubprocessError, OSError):
+        logger.exception("Could not build a video thumbnail for %s", path)
+        temp.unlink(missing_ok=True)
         return None
     return target if target.exists() else None
+
+
+def generate_image_thumbnail(md5, path):
+    """Downscale an image, cached under MEDIA_ROOT/thumbs like video thumbs.
+
+    The thumbnail action used to serve full-size originals for images; a
+    cached 480px JPEG keeps the library grid light without touching the
+    original file. Returns ``None`` when the source is missing or Pillow
+    cannot decode it, so callers can fall back to the original.
+    """
+    try:
+        thumbs_dir = _thumbs_dir()
+    except OSError:
+        logger.exception("Could not create the thumbnail folder")
+        return None
+    target = thumbs_dir / f"{md5}.jpg"
+    if _thumbnail_is_fresh(target, path):
+        return target
+    temp = thumbs_dir / f".{md5}.{uuid.uuid4().hex}.part.jpg"
+    try:
+        with Image.open(path) as image:
+            # Animated formats: the first frame is the preview.
+            image.seek(0)
+            frame = ImageOps.exif_transpose(image) or image
+            frame = frame.convert("RGB")
+            frame.thumbnail((480, 480))
+            frame.save(temp, "JPEG", quality=82, optimize=True)
+        os.replace(temp, target)
+    except Exception:  # noqa: BLE001 - previews must never break serving
+        logger.exception("Could not build an image thumbnail for %s", path)
+        temp.unlink(missing_ok=True)
+        return None
+    return target if target.exists() else None
+
+
+def ensure_thumbnail(item):
+    """Generate an item's cached thumbnail if it is missing or stale.
+
+    Warming thumbnails when a file is indexed keeps image decoding out of the
+    request path, where the upload pipeline's hashing used to starve it.
+    """
+    location = item.locations.first()
+    if location is None:
+        return None
+    path = Path(location.path)
+    if not path.is_file():
+        return None
+    if path.suffix.lower() in VIDEO_EXTENSIONS:
+        return generate_video_thumbnail(item.md5, path)
+    return generate_image_thumbnail(item.md5, path)

backend/apps/library/signing_urls.py

@@ -0,0 +1,64 @@
+"""Stable, expiring signatures for media URLs.
+
+The SPA loads media with ``<img>``/``<video>`` tags, which cannot send the
+API's ``Authorization`` header, so those URLs carry a signature instead. The
+signature has to be *stable*: a URL that changes on every response makes the
+browser treat every refetch as a new resource and re-download the file.
+
+URLs are signed with a plain ``Signer`` (no per-second timestamp) plus an
+explicit ``exp`` claim quantized to a bucket, so every request inside a bucket
+mints the exact same URL. The URL rotates once per bucket and is valid for at
+least ``URL_TTL_SECONDS`` and at most ``URL_TTL_SECONDS + URL_BUCKET_SECONDS``.
+"""
+
+import time
+
+from django.core import signing
+
+URL_TTL_SECONDS = 7 * 86400
+URL_BUCKET_SECONDS = 24 * 3600
+_BUCKETS = URL_TTL_SECONDS // URL_BUCKET_SECONDS
+
+
+def _expiry(now=None):
+    current = time.time() if now is None else now
+    bucket = int(current // URL_BUCKET_SECONDS)
+    return (bucket + _BUCKETS + 1) * URL_BUCKET_SECONDS
+
+
+def sign_payload(payload, salt, now=None):
+    """Sign a payload with a stable, bucket-quantized expiry."""
+    return signing.Signer(salt=salt).sign_object(
+        {**payload, "exp": _expiry(now)}
+    )
+
+
+def load_payload(signature, salt, legacy_max_age=86400):
+    """Verify a signed payload; ``None`` when missing, tampered with or expired.
+
+    Legacy ``TimestampSigner`` values are still accepted for one release.
+    Detect them by their extra separator (``payload:timestamp:signature``):
+    a plain ``Signer`` accepts the HMAC a ``TimestampSigner`` computed over
+    ``payload:timestamp`` and then chokes on the embedded timestamp while
+    decoding the JSON payload, which used to surface as a 500.
+    """
+    if not signature:
+        return None
+    if signature.count(":") >= 2:
+        try:
+            return signing.TimestampSigner(salt=salt).unsign_object(
+                signature, max_age=legacy_max_age
+            )
+        except (signing.BadSignature, ValueError):
+            return None
+    try:
+        data = signing.Signer(salt=salt).unsign_object(signature)
+    except (signing.BadSignature, ValueError):
+        return None
+    if not isinstance(data, dict):
+        return None
+    try:
+        expired = int(data.get("exp", 0)) < time.time()
+    except (TypeError, ValueError):
+        return None
+    return None if expired else data

backend/apps/library/similarity.py

@@ -11,7 +11,6 @@ from datetime import timedelta
 from pathlib import Path
 
 from django.conf import settings
-from django.core import signing
 from django.utils import timezone
 from rest_framework import mixins, status, viewsets
 from rest_framework.decorators import action
@@ -22,6 +21,7 @@ from rest_framework.response import Response
 from . import services
 from .models import MediaItem, SimilarityCheck
 from .serializers import SimilarityCheckSerializer
+from .signing_urls import load_payload
 from .tools import item_brief
 from .uploads import find_library_matches
 
@@ -149,14 +149,7 @@ class SimilarityCheckViewSet(
             check = self.get_queryset().filter(pk=pk).first()
         else:
             signature = request.query_params.get("sig")
-            payload = None
-            if signature:
-                try:
-                    payload = signing.loads(
-                        signature, salt=services.UPLOAD_FILE_SALT, max_age=86400
-                    )
-                except signing.BadSignature:
-                    payload = None
+            payload = load_payload(signature, services.UPLOAD_FILE_SALT) if signature else None
             if payload and payload.get("check") == str(pk):
                 check = SimilarityCheck.objects.filter(pk=pk).first()
         if check is None or not check.file:

backend/apps/library/tests/test_media_cache.py

@@ -0,0 +1,188 @@
+"""Signed media URLs must be stable, versioned and cacheable.
+
+Regression: signatures embedded the current second, so every API response
+re-minted every URL and browsers re-downloaded each image on every poll; the
+file responses also carried no cache headers at all.
+"""
+
+import base64
+import hashlib
+import io
+import shutil
+import tempfile
+import time
+from pathlib import Path
+from unittest import mock
+
+from django.contrib.auth import get_user_model
+from django.core import signing
+from django.core.files.uploadedfile import SimpleUploadedFile
+from django.test import Client, TestCase, override_settings
+
+from PIL import Image
+
+from rest_framework.authtoken.models import Token
+
+from apps.library import services
+from apps.library.models import MediaItem, MediaLocation, TempUpload
+from apps.library.signing_urls import load_payload, sign_payload
+
+User = get_user_model()
+
+TINY_PNG = base64.b64decode(
+    "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg=="
+)
+
+
+def png_bytes(width=1200, height=800, color=(20, 120, 200)):
+    buffer = io.BytesIO()
+    Image.new("RGB", (width, height), color).save(buffer, format="PNG")
+    return buffer.getvalue()
+
+
+class MediaCacheTests(TestCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls._tmp = tempfile.mkdtemp(prefix="j621-cache-")
+        cls._media = Path(cls._tmp) / "media"
+        cls._watched = cls._media / "library"
+        cls._watched.mkdir(parents=True, exist_ok=True)
+        cls._settings = override_settings(
+            MEDIA_ROOT=str(cls._media), WATCHED_FOLDER=str(cls._watched)
+        )
+        cls._settings.enable()
+
+    @classmethod
+    def tearDownClass(cls):
+        cls._settings.disable()
+        shutil.rmtree(cls._tmp, ignore_errors=True)
+        super().tearDownClass()
+
+    def setUp(self):
+        self.user = User.objects.create_user(
+            username="cache-uploader", password="cache-pass-123456"
+        )
+        self.user.role = "uploader"
+        self.user.save(update_fields=["role"])
+        self.token = Token.objects.create(user=self.user).key
+        payload = png_bytes()
+        path = self._watched / "cache-image.png"
+        path.write_bytes(payload)
+        self.item = MediaItem.objects.create(
+            md5=hashlib.md5(payload).hexdigest(), size=len(payload)
+        )
+        MediaLocation.objects.create(
+            item=self.item, path=str(path), rel_path=path.name, mtime=time.time()
+        )
+        self.client = Client()
+
+    def signed(self, action):
+        return {
+            "sig": sign_payload(
+                {"item": self.item.id, "user": self.user.id, "action": action},
+                services.MEDIA_FILE_SALT,
+            )
+        }
+
+    def test_media_response_carries_cache_headers(self):
+        response = self.client.get(
+            f"/api/files/J-{self.item.id}/raw/", self.signed("raw")
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertIn("private", response["Cache-Control"])
+        self.assertIn(
+            f"max-age={services.MEDIA_CACHE_SECONDS}", response["Cache-Control"]
+        )
+        self.assertIn("immutable", response["Cache-Control"])
+        self.assertTrue(response["ETag"])
+        self.assertTrue(response["Last-Modified"])
+
+    def test_media_revalidation_returns_304(self):
+        url = f"/api/files/J-{self.item.id}/raw/"
+        first = self.client.get(url, self.signed("raw"))
+        second = self.client.get(
+            url, self.signed("raw"), HTTP_IF_NONE_MATCH=first["ETag"]
+        )
+        self.assertEqual(second.status_code, 304)
+        self.assertEqual(second.content, b"")
+
+    def test_image_thumbnail_is_generated_and_reused(self):
+        url = f"/api/files/J-{self.item.id}/thumbnail/"
+        response = self.client.get(url, self.signed("thumbnail"))
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response["Content-Type"], "image/jpeg")
+        thumb = self._media / "thumbs" / f"{self.item.md5}.jpg"
+        self.assertTrue(thumb.exists())
+        with Image.open(thumb) as image:
+            self.assertLessEqual(max(image.size), 480)
+        before = thumb.stat().st_mtime_ns
+        self.client.get(url, self.signed("thumbnail"))
+        self.assertEqual(thumb.stat().st_mtime_ns, before)
+
+    def test_ensure_thumbnail_reuses_the_cache(self):
+        first = services.ensure_thumbnail(self.item)
+        self.assertIsNotNone(first)
+        self.assertTrue(first.exists())
+        mtime = first.stat().st_mtime_ns
+        second = services.ensure_thumbnail(self.item)
+        self.assertEqual(second, first)
+        self.assertEqual(second.stat().st_mtime_ns, mtime)
+
+    def test_thumbnail_of_a_missing_source_does_not_error(self):
+        """Regression: getmtime() on a vanished source used to raise a 500."""
+        thumbs = self._media / "thumbs"
+        thumbs.mkdir(parents=True, exist_ok=True)
+        (thumbs / f"{self.item.md5}.jpg").write_bytes(b"stale")
+        Path(self.item.locations.first().path).unlink()
+        self.assertIsNone(services.ensure_thumbnail(self.item))
+        response = self.client.get(
+            f"/api/files/J-{self.item.id}/thumbnail/", self.signed("thumbnail")
+        )
+        self.assertEqual(response.status_code, 404)
+
+    def test_staged_files_cache_briefly(self):
+        temp = TempUpload.objects.create(
+            user=self.user,
+            file=SimpleUploadedFile("staged.png", TINY_PNG, content_type="image/png"),
+            original_filename="staged.png",
+            md5=hashlib.md5(b"staged").hexdigest(),
+            size=len(TINY_PNG),
+        )
+        signature = sign_payload(
+            {"temp": str(temp.id), "user": self.user.id}, services.UPLOAD_FILE_SALT
+        )
+        response = self.client.get(
+            f"/api/uploads/{temp.id}/file/", {"sig": signature}
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertIn(
+            f"max-age={services.TEMP_CACHE_SECONDS}", response["Cache-Control"]
+        )
+        self.assertNotIn("immutable", response["Cache-Control"])
+
+    def test_legacy_timestamp_signatures_are_accepted(self):
+        """URLs minted before the stable scheme must not 500.
+
+        A TimestampSigner HMAC also passes a plain Signer's check, so the
+        embedded timestamp used to reach the JSON decoder and blow up.
+        """
+        payload = {"item": self.item.id, "user": self.user.id, "action": "raw"}
+        legacy = signing.dumps(payload, salt=services.MEDIA_FILE_SALT)
+        self.assertEqual(
+            load_payload(legacy, services.MEDIA_FILE_SALT)["item"], self.item.id
+        )
+        response = self.client.get(
+            f"/api/files/J-{self.item.id}/raw/", {"sig": legacy}
+        )
+        self.assertEqual(response.status_code, 200)
+
+    def test_expired_and_malformed_signatures_return_none(self):
+        payload = {"item": self.item.id, "user": self.user.id, "action": "raw"}
+        with mock.patch.object(signing, "time") as clock:
+            clock.time.return_value = time.time() - 3 * 86400
+            expired = signing.dumps(payload, salt=services.MEDIA_FILE_SALT)
+        self.assertIsNone(load_payload(expired, services.MEDIA_FILE_SALT))
+        self.assertIsNone(load_payload("bogus", services.MEDIA_FILE_SALT))
+        self.assertIsNone(load_payload("a:b", services.MEDIA_FILE_SALT))
+        self.assertIsNone(load_payload("", services.MEDIA_FILE_SALT))

backend/apps/library/tests/test_uploads.py

@@ -170,12 +170,18 @@ class StagedUploadWorkflowTests(TestCase):
         self.assertEqual(len(body["resolved"]), 2)
         self.assertEqual(body["errors"], [])
 
-        for temp in (first, second):
-            temp.refresh_from_db()
-            self.assertEqual(temp.status, TempUpload.STATUS_COMPLETED)
-            self.assertIsNotNone(temp.library_item_id)
-            self.assertEqual(temp.library_item.rating, "q")
-            self.assertEqual(temp.library_item.uploaded_by_id, self.uploader.id)
+        # Completed uploads are notifications now: the staged rows are gone
+        # and the live feed carries the filename -> J-ID mapping.
+        self.assertFalse(
+            TempUpload.objects.filter(pk__in=[first.id, second.id]).exists()
+        )
+        feed = UploadRun.objects.get(user=self.uploader).recent_completions
+        self.assertEqual(
+            {entry["filename"] for entry in feed}, {"one.png", "two.png"}
+        )
+        for item in MediaItem.objects.all():
+            self.assertEqual(item.rating, "q")
+            self.assertEqual(item.uploaded_by_id, self.uploader.id)
         untouched.refresh_from_db()
         self.assertEqual(untouched.status, TempUpload.STATUS_PENDING)
 
@@ -231,6 +237,25 @@ class StagedUploadWorkflowTests(TestCase):
         self.assertEqual(response.status_code, 200)
         return seed
 
+    def test_duplicate_upload_returns_a_completion_without_a_record(self):
+        client = self.api_client(self.uploader)
+        first = self.upload_via_api(client, "same.png")
+        self.assertEqual(first.status_code, 201)
+        # Index the first upload so the second one is byte-identical.
+        seed = TempUpload.objects.get(pk=first.json()["temp_id"])
+        self.resolve_bulk(client, [seed.id], "s")
+
+        response = self.upload_via_api(client, "same.png")
+        self.assertEqual(response.status_code, 201)
+        body = response.json()
+        self.assertEqual(body["status"], TempUpload.STATUS_COMPLETED)
+        self.assertEqual(body["resolution"], TempUpload.RESOLUTION_DUPLICATE)
+        self.assertTrue(body["library_j_id"].startswith("J-"))
+        # Duplicates never become board records; the feed announces them.
+        self.assertFalse(TempUpload.objects.filter(pk=body["temp_id"]).exists())
+        feed = UploadRun.objects.get(user=self.uploader).recent_completions
+        self.assertEqual(feed[-1]["filename"], "same.png")
+
     def test_upload_defers_visual_similarity_to_its_phase(self):
         client = self.api_client(self.uploader)
         self.seed_library_item(client, "seed-defer")
@@ -262,6 +287,37 @@ class StagedUploadWorkflowTests(TestCase):
         self.assertEqual(body["visual_matches"], [])
         self.assertEqual(body["status"], TempUpload.STATUS_PENDING)
 
+    def test_detail_resigns_stored_visual_match_urls(self):
+        """Stored matches carry only the item reference; URLs are re-minted.
+
+        Embedding the signed URL meant it expired (or used an older signing
+        scheme) and the modal showed alt text instead of thumbnails.
+        """
+        client = self.api_client(self.uploader)
+        self.seed_library_item(client, "seed-resign")
+        item = MediaItem.objects.get()
+        temp = self.make_temp(self.uploader, "resign")
+        TempUpload.objects.filter(pk=temp.pk).update(
+            visual_matches=[
+                {
+                    "item_id": item.id,
+                    "j_id": f"J-{item.id}",
+                    "filename": "seed-resign.png",
+                    "similarity": 96.5,
+                    "thumbnail_url": "/api/files/J-x/thumbnail/?sig=stale",
+                },
+                {"item_id": 999999, "j_id": "J-999999", "filename": "gone.png"},
+            ]
+        )
+        body = client.get(f"/api/uploads/{temp.id}/").json()
+        self.assertEqual(len(body["visual_matches"]), 1)
+        match = body["visual_matches"][0]
+        self.assertEqual(match["j_id"], f"J-{item.id}")
+        self.assertEqual(match["similarity"], 96.5)
+        self.assertNotIn("stale", match["thumbnail_url"])
+        self.assertIn("/thumbnail/", match["thumbnail_url"])
+        self.assertIn(f"v={item.md5}", match["thumbnail_url"])
+
     def test_visual_match_phase_rejects_completed_uploads(self):
         client = self.api_client(self.uploader)
         temp = self.make_temp(
@@ -312,14 +368,23 @@ class StagedUploadWorkflowTests(TestCase):
         body = response.json()
         self.assertEqual(body["errors"], [])
         self.assertEqual(len(body["updated"]), 2)
-        for temp, post_id in ((first, 900001), (second, 900002)):
-            temp.refresh_from_db()
-            self.assertEqual(temp.status, TempUpload.STATUS_COMPLETED)
-            self.assertEqual(temp.library_item_id is not None, True)
-            self.assertEqual(temp.e621_post_id, post_id)
-            self.assertEqual(temp.resolution, TempUpload.RESOLUTION_AUTO_MD5)
-            self.assertEqual(temp.library_item.e621_post_id, post_id)
-        self.assertEqual(MediaItem.objects.count(), 2)
+        for entry, post_id in zip(body["updated"], (900001, 900002)):
+            self.assertEqual(entry["resolution"], TempUpload.RESOLUTION_AUTO_MD5)
+            self.assertEqual(entry["e621_post_id"], post_id)
+            self.assertTrue(entry["library_j_id"].startswith("J-"))
+        # Indexed uploads no longer leave a board record; the completion feed
+        # carries them for the live page instead.
+        self.assertFalse(TempUpload.objects.exists())
+        self.assertEqual(
+            {item.e621_post_id for item in MediaItem.objects.all()},
+            {900001, 900002},
+        )
+        feed = UploadRun.objects.get(user=self.uploader).recent_completions
+        self.assertEqual(len(feed), 2)
+        self.assertEqual(
+            {entry["filename"] for entry in feed},
+            {"bulk-link-1.png", "bulk-link-2.png"},
+        )
 
 
 class IqdbRecordingTests(TestCase):
@@ -461,6 +526,7 @@ class UploadPipelineTests(TestCase):
 
     def test_md5_match_auto_imports_the_file(self):
         temp = self.stage(label="match")
+        temp_id = temp.id
         post = {
             "id": 123456,
             "rating": "s",
@@ -477,17 +543,42 @@ class UploadPipelineTests(TestCase):
         ):
             upload_pipeline.run_pipeline(self.uploader.id)
 
-        temp.refresh_from_db()
-        self.assertEqual(temp.status, TempUpload.STATUS_COMPLETED)
-        self.assertEqual(temp.resolution, TempUpload.RESOLUTION_AUTO_MD5)
-        self.assertEqual(temp.e621_post_id, 123456)
-        self.assertIsNotNone(temp.library_item_id)
-        self.assertIsNotNone(temp.e621_checked_at)
-        self.assertIsNone(temp.claimed_at)
+        # The indexed upload leaves no board record; the feed reports it.
+        self.assertFalse(TempUpload.objects.filter(pk=temp_id).exists())
+        item = MediaItem.objects.get(e621_post_id=123456)
+        self.assertEqual(item.uploaded_by_id, self.uploader.id)
         run = UploadRun.objects.get(user=self.uploader)
         self.assertEqual(run.status, UploadRun.STATUS_IDLE)
         self.assertEqual(run.matched, 1)
         self.assertEqual(run.processed, 1)
+        self.assertEqual(len(run.recent_completions), 1)
+        entry = run.recent_completions[0]
+        self.assertEqual(entry["id"], str(temp_id))
+        self.assertEqual(entry["item_id"], item.id)
+        self.assertEqual(entry["filename"], "match.png")
+        self.assertEqual(entry["resolution"], TempUpload.RESOLUTION_AUTO_MD5)
+
+    def test_status_reports_the_completion_feed(self):
+        temp = self.stage(label="feed")
+        client = self.api_client(self.uploader)
+        post = {
+            "id": 654321,
+            "rating": "s",
+            "file": {"md5": temp.md5, "url": "https://static1.e621.net/data/f.png"},
+        }
+        with mock.patch.object(
+            upload_pipeline.e621,
+            "check_md5_batch",
+            return_value={temp.md5: post},
+        ):
+            upload_pipeline.run_pipeline(self.uploader.id)
+
+        body = client.get("/api/uploads/status/").json()
+        completions = body["recent_completions"]
+        self.assertEqual(len(completions), 1)
+        self.assertEqual(completions[0]["filename"], "feed.png")
+        self.assertEqual(completions[0]["j_id"], f"J-{MediaItem.objects.get().id}")
+        self.assertIn("/thumbnail/", completions[0]["thumbnail_url"])
 
     def test_unmatched_file_runs_every_phase(self):
         temp = self.stage(label="nomatch")

backend/apps/library/upload_pipeline.py

@@ -29,7 +29,7 @@ from django.db.models import F, Q
 from django.utils import timezone
 
 from . import e621, services
-from .models import TempUpload, UploadRun
+from .models import MediaItem, TempUpload, UploadRun
 
 logger = logging.getLogger(__name__)
 
@@ -46,6 +46,9 @@ MAX_ATTEMPTS = 3
 # Round-level e621 retries before the run is paused.
 ROUND_ATTEMPTS = 3
 ROUND_RETRY_SECONDS = 20
+# Completions kept in the live feed. The board only shows what happened while
+# the page was open, so a bounded rolling window is plenty.
+COMPLETION_FEED_LIMIT = 200
 
 WORK_STATUSES = (TempUpload.STATUS_PENDING, TempUpload.STATUS_VISUAL_MATCH)
 VIDEO_RE = r"\.(mp4|webm)$"
@@ -116,7 +119,7 @@ def waiting_counts(user):
     }
 
 
-def status_payload(user):
+def status_payload(user, request=None):
     """Cheap state for the shell/upload page to poll."""
     run = UploadRun.objects.filter(user=user).first()
     outstanding = count_outstanding(user)
@@ -141,10 +144,67 @@ def status_payload(user):
         "error": run.error if run is not None else "",
         "outstanding": outstanding,
         "waiting": waiting_counts(user),
+        "recent_completions": completion_payload(run, user, request=request),
         "updated_at": run.updated_at.isoformat() if run is not None else None,
     }
 
 
+def completion_payload(run, user, request=None):
+    """The live completion feed: filename -> J-ID for freshly indexed uploads.
+
+    Completed ``TempUpload`` rows are deleted, so this is the only place the
+    board learns about them. It is a notification feed, not durable state:
+    bounded, never dismissed, and ignored by fresh page loads.
+    """
+    entries = list(run.recent_completions or []) if run is not None else []
+    if not entries:
+        return []
+    ids = [entry.get("item_id") for entry in entries if entry.get("item_id")]
+    items = MediaItem.objects.in_bulk(ids)
+    out = []
+    for entry in reversed(entries):  # newest first
+        item = items.get(entry.get("item_id"))
+        if item is None:
+            continue
+        out.append(
+            {
+                "id": entry.get("id"),
+                "filename": entry.get("filename"),
+                "j_id": f"J-{item.id}",
+                "resolution": entry.get("resolution", ""),
+                "post_id": entry.get("post_id"),
+                "thumbnail_url": services.signed_media_url(
+                    item, user, "thumbnail", request=request
+                ),
+                "at": entry.get("at"),
+            }
+        )
+    return out
+
+
+def record_completion(temp, item, resolution=""):
+    """Append one completion to the owner's feed; never fails an import."""
+    entry = {
+        "id": str(temp.pk),
+        "filename": temp.original_filename,
+        "item_id": item.pk,
+        "resolution": resolution or temp.resolution or "",
+        "post_id": temp.e621_post_id,
+        "at": timezone.now().isoformat(),
+    }
+    try:
+        with transaction.atomic():
+            run, _ = UploadRun.objects.select_for_update().get_or_create(
+                user_id=temp.user_id
+            )
+            feed = list(run.recent_completions or [])
+            feed.append(entry)
+            run.recent_completions = feed[-COMPLETION_FEED_LIMIT:]
+            run.save(update_fields=["recent_completions", "updated_at"])
+    except Exception:  # noqa: BLE001 - a notification must not break an import
+        logger.exception("Could not record the completion of %s", temp.pk)
+
+
 def reap_stale_claims():
     """Queue rows left claimed by a recycled worker and pause dead runs."""
     cutoff = timezone.now() - STALE_CLAIM_AFTER
@@ -237,20 +297,17 @@ def run_pipeline(user_id):
                 break
             process_round(run, user, rows)
     except PipelinePaused as exc:
-        run.status = UploadRun.STATUS_PAUSED
-        run.phase = ""
-        run.error = str(exc)
-        run.save()
+        _save_run(run, status=UploadRun.STATUS_PAUSED, phase="", error=str(exc))
     except Exception as exc:  # noqa: BLE001 - surface crashes as a run error
         logger.exception("Upload pipeline for user %s failed", user_id)
-        run.status = UploadRun.STATUS_ERROR
-        run.phase = ""
-        run.error = f"The upload pipeline stopped: {exc}"
-        run.save()
+        _save_run(
+            run,
+            status=UploadRun.STATUS_ERROR,
+            phase="",
+            error=f"The upload pipeline stopped: {exc}",
+        )
     else:
-        run.status = UploadRun.STATUS_IDLE
-        run.phase = ""
-        run.save()
+        _save_run(run, status=UploadRun.STATUS_IDLE, phase="")
 
 
 def claim_round(user, size=CLAIM_SIZE):
@@ -460,7 +517,9 @@ def finalize_round(run, ids, matched):
         TempUpload.objects.filter(pk__in=release).update(claimed_at=None)
     _save_run(
         run,
-        processed=run.processed + len(finished),
+        # Completed rows are deleted as they are imported, so they cannot be
+        # seen in the refreshed rows; count the matches explicitly.
+        processed=run.processed + len(finished) + matched,
         failed=run.failed + len(failed - finished),
         matched=run.matched + matched,
     )

backend/apps/library/uploads.py

@@ -16,7 +16,6 @@ from urllib.parse import urlparse
 
 from django.conf import settings
 from django.contrib.auth import get_user_model
-from django.core import signing
 from django.core.exceptions import ValidationError
 from django.http import Http404
 from django.utils import timezone
@@ -30,6 +29,7 @@ from . import services
 from .models import MediaItem, TempUpload
 from .permissions import CanUpload
 from .serializers import TempUploadListSerializer, TempUploadSerializer
+from .signing_urls import load_payload
 from .tools import HASH_FIELDS, hashed_items, hashes_similarity
 
 logger = logging.getLogger(__name__)
@@ -60,6 +60,7 @@ def match_hashes(hashes, index, limit=10, user=None, request=None):
         location = item.locations.first()
         matches.append(
             {
+                "item_id": item.id,
                 "j_id": f"J-{item.id}",
                 "filename": Path(location.rel_path).name if location else item.md5,
                 "similarity": round(similarity * 100, 1),
@@ -127,6 +128,12 @@ def complete_temp_upload(temp, download_url=None):
         services.ensure_visual_hashes(item)
         temp.file.delete(save=False)
 
+    # Warm the preview while the import is still off the request path.
+    try:
+        services.ensure_thumbnail(item)
+    except Exception:  # noqa: BLE001 - a preview must not fail the import
+        logger.exception("Could not warm the thumbnail for J-%s", item.id)
+
     temp.library_item = item
     temp.status = TempUpload.STATUS_COMPLETED
 
@@ -158,6 +165,13 @@ def complete_temp_upload(temp, download_url=None):
         item.save(update_fields=update_fields + ["updated_at"])
 
     temp.save()
+    from .upload_pipeline import record_completion
+
+    record_completion(temp, item)
+    # The board learns about completions from the live feed, so the record is
+    # deleted as soon as the file is indexed: nothing left to dismiss. Delete
+    # through the queryset so callers keep ``temp.pk`` for their response.
+    TempUpload.objects.filter(pk=temp.pk).delete()
     return item
 
 
@@ -190,6 +204,28 @@ class TempUploadViewSet(
             user=self.request.user
         )
 
+    def _completed_payload(self, temp, item):
+        """Synthetic row for an upload that is indexed immediately.
+
+        Duplicates and resolved uploads never leave a board record; the SPA
+        turns this response (or the live completion feed) into a "J-x
+        uploaded" card that lives only in the page session.
+        """
+        return {
+            "temp_id": str(temp.pk),
+            "original_filename": temp.original_filename,
+            "md5": temp.md5,
+            "size": temp.size,
+            "status": TempUpload.STATUS_COMPLETED,
+            "resolution": temp.resolution,
+            "e621_post_id": temp.e621_post_id,
+            "library_j_id": f"J-{item.id}",
+            "file_url": None,
+            "preview_url": services.signed_media_url(
+                item, self.request.user, "thumbnail", request=self.request
+            ),
+        }
+
     def create(self, request):
         upload = request.FILES.get("file")
         if upload is None:
@@ -217,6 +253,13 @@ class TempUploadViewSet(
             temp.resolution = TempUpload.RESOLUTION_DUPLICATE
             temp.library_item = existing
             temp.file.delete(save=False)
+            temp.save()
+            from .upload_pipeline import record_completion
+
+            record_completion(temp, existing)
+            payload = self._completed_payload(temp, existing)
+            TempUpload.objects.filter(pk=temp.pk).delete()
+            return Response(payload, status=status.HTTP_201_CREATED)
         # Visual similarity and IQDB run in the background pipeline so a large
         # batch uploads at full speed and the work survives the browser.
         temp.save()
@@ -257,7 +300,7 @@ class TempUploadViewSet(
         """Cheap pipeline state for the shell indicator and the upload page."""
         from .upload_pipeline import status_payload
 
-        return Response(status_payload(request.user))
+        return Response(status_payload(request.user, request=request))
 
     @action(detail=False, methods=["post"])
     def process(self, request):
@@ -269,7 +312,7 @@ class TempUploadViewSet(
         from .upload_pipeline import start_pipeline, status_payload
 
         start_pipeline(request.user)
-        return Response(status_payload(request.user))
+        return Response(status_payload(request.user, request=request))
 
     @action(detail=True, methods=["post"])
     def retry(self, request, pk=None):
@@ -314,7 +357,7 @@ class TempUploadViewSet(
             update["status"] = TempUpload.STATUS_PENDING
         TempUpload.objects.filter(pk=temp.pk).update(**update)
         start_pipeline(request.user)
-        return Response(status_payload(request.user))
+        return Response(status_payload(request.user, request=request))
 
     @action(detail=False, methods=["post"], url_path="retry-all")
     def retry_all(self, request):
@@ -340,7 +383,7 @@ class TempUploadViewSet(
             e621_checked_at=None,
         )
         start_pipeline(request.user)
-        return Response(status_payload(request.user))
+        return Response(status_payload(request.user, request=request))
 
     @action(detail=False, methods=["post"], url_path="discard-bulk")
     def discard_bulk(self, request):
@@ -393,14 +436,7 @@ class TempUploadViewSet(
         if user is None:
             signature = request.query_params.get("sig")
             if signature:
-                try:
-                    payload = signing.loads(
-                        signature,
-                        salt=services.UPLOAD_FILE_SALT,
-                        max_age=86400,
-                    )
-                except signing.BadSignature:
-                    payload = None
+                payload = load_payload(signature, services.UPLOAD_FILE_SALT)
                 if payload and str(payload.get("temp")) == str(pk):
                     user = (
                         get_user_model()
@@ -501,7 +537,7 @@ class TempUploadViewSet(
 
         temp.save()
         try:
-            complete_temp_upload(temp, download_url=download_url)
+            item = complete_temp_upload(temp, download_url=download_url)
         except Exception as exc:  # noqa: BLE001 - report completion failures
             logger.exception("Could not complete staged upload %s", temp.id)
             temp.status = TempUpload.STATUS_ERROR
@@ -510,8 +546,7 @@ class TempUploadViewSet(
                 {"detail": f"Could not finish the upload: {exc}"},
                 status=status.HTTP_400_BAD_REQUEST,
             )
-        temp.refresh_from_db()
-        return Response(self.get_serializer(temp).data)
+        return Response(self._completed_payload(temp, item))
 
     @action(detail=False, methods=["post"], url_path="link-bulk")
     def link_bulk(self, request):
@@ -583,15 +618,14 @@ class TempUploadViewSet(
                 candidate_url = ""
             temp.save()
             try:
-                complete_temp_upload(temp, download_url=candidate_url or None)
+                item = complete_temp_upload(temp, download_url=candidate_url or None)
             except Exception as exc:  # noqa: BLE001 - report per-file failures
                 logger.exception("Could not complete staged upload %s", temp.id)
                 temp.status = TempUpload.STATUS_ERROR
                 temp.save(update_fields=["status", "updated_at"])
                 errors.append({"temp_id": temp_id, "error": str(exc)})
                 continue
-            temp.refresh_from_db()
-            updated.append(self.get_serializer(temp).data)
+            updated.append(self._completed_payload(temp, item))
 
         return Response({"updated": updated, "errors": errors})
 

backend/apps/library/views.py

@@ -5,7 +5,6 @@ from pathlib import Path
 from urllib.parse import urlparse
 
 from django.conf import settings
-from django.core import signing
 from django.db.models import Min, Q
 from django.http import Http404, StreamingHttpResponse
 from django.shortcuts import get_object_or_404
@@ -31,6 +30,7 @@ from .serializers import (
     MatchTaskSerializer,
     MediaItemSerializer,
 )
+from .signing_urls import load_payload
 
 LIST_ORDERINGS = {"name", "-name", "size", "-size", "created_at", "-created_at"}
 MD5_RE = re.compile(r"[0-9a-fA-F]{32}")
@@ -132,11 +132,8 @@ class MediaItemViewSet(
         signature = request.query_params.get("sig")
         if not signature:
             return None
-        try:
-            payload = signing.loads(
-                signature, salt=services.MEDIA_FILE_SALT, max_age=86400
-            )
-        except signing.BadSignature:
+        payload = load_payload(signature, services.MEDIA_FILE_SALT)
+        if payload is None:
             return None
         if payload.get("action") != action_name:
             return None
@@ -158,7 +155,11 @@ class MediaItemViewSet(
                 status=status.HTTP_404_NOT_FOUND,
             )
         return services.serve_file(
-            request, location.path, download=request.query_params.get("download") == "1"
+            request,
+            location.path,
+            download=request.query_params.get("download") == "1",
+            max_age=services.MEDIA_CACHE_SECONDS,
+            immutable=True,
         )
 
     @action(detail=True, methods=["get"], throttle_classes=[])
@@ -173,13 +174,26 @@ class MediaItemViewSet(
         path = Path(location.path)
         if path.suffix.lower() in services.VIDEO_EXTENSIONS:
             thumbnail = services.generate_video_thumbnail(item.md5, path)
-            if thumbnail is None:
-                return Response(
-                    {"detail": "Thumbnail unavailable."},
-                    status=status.HTTP_404_NOT_FOUND,
-                )
-            return services.serve_file(request, thumbnail)
-        return services.serve_file(request, path)
+        else:
+            thumbnail = services.generate_image_thumbnail(item.md5, path)
+        if thumbnail is not None:
+            return services.serve_file(
+                request,
+                thumbnail,
+                max_age=services.MEDIA_CACHE_SECONDS,
+                immutable=True,
+            )
+        if path.suffix.lower() in services.VIDEO_EXTENSIONS:
+            return Response(
+                {"detail": "Thumbnail unavailable."},
+                status=status.HTTP_404_NOT_FOUND,
+            )
+        return services.serve_file(
+            request,
+            path,
+            max_age=services.MEDIA_CACHE_SECONDS,
+            immutable=True,
+        )
 
     @action(detail=False, methods=["post"], permission_classes=[AllowAny])
     def lookup(self, request):

deploy/README.md

@@ -145,9 +145,12 @@ Build the desktop installers without publishing anything:
 ```
 
 Hand the files out or attach them to a Gitea release manually — the script
-prints sizes and SHA-256 sums for the release notes.
+prints sizes and SHA-256 sums for the release notes. The release assets are
+also the desktop update feed; the app resolves the newest `desktop-v*`
+release on Gitea at check time (see `desktop/README.md`).
 
-Push the desktop builds and their update metadata to the frontend's feed:
+The frontend's `/desktop/` feed is optional now — kept for manual downloads
+and for installs older than 0.1.2. To publish it:
 
 ```bash
 ./push_desktop.sh            # build Linux packages + copy the feed to jakerasp
@@ -160,19 +163,13 @@ The remote copy defaults to `jakerasp:/home/jake/servers/J621`, or
 `$J621_DESKTOP_FEED_HOST` when set. Artifacts land in `deploy/data/desktop/`,
 which the frontend nginx mounts read-only and serves at `/desktop/`. The
 remote copy uses rsync when both ends have it, tar over ssh when the server
-does not. The desktop app's "Check for updates…" menu item reads
-`latest-linux.yml` / `latest.yml` from there (see `desktop/README.md`).
-Backend-only composes have no frontend, so no feed.
+does not. Backend-only composes have no frontend, so no website feed.
 
 The manual **CD** workflow (Actions tab) builds the desktop packages on the
 runner and attaches them plus the update metadata to the Gitea release
-`desktop-v<version>`; it does not touch the live feed, because that is
-runtime state on the deploy host and CI has no SSH key for it. After a CD run,
-publish the feed from a machine that can reach the deploy checkout:
-
-```bash
-./push_desktop.sh --no-build --local   # or without --local to also copy it
-```
+`desktop-v<version>`; that is what the desktop updater reads. The website feed
+is not touched by CI (runtime state on the deploy host, no SSH key there); use
+`push_desktop.sh` when it needs refreshing for old installs.
 
 ## Scheduled jobs
 

deploy/push_desktop.sh

@@ -1,11 +1,12 @@
 #!/bin/bash
-# Build the J621 desktop packages and publish them to the update feed.
+# Build the J621 desktop packages, optionally publish them to the website
+# feed.
 #
-# Locally the feed is deploy/data/desktop, which the frontend nginx mounts
-# read-only and serves at /desktop/. With --host the same directory is also
-# copied to a remote deploy checkout (rsync, or tar over ssh when the server
-# has no rsync). electron-updater reads latest-linux.yml / latest.yml from
-# there; the feed URL comes from desktop/electron-builder.yml.
+# Desktop updates no longer depend on this: the app resolves the newest
+# `desktop-v*` release on Gitea at check time (see desktop/README.md). This
+# script builds the packages and can copy them to deploy/data/desktop, which
+# the frontend nginx mounts read-only and serves at /desktop/ for manual
+# downloads and for pre-0.1.2 installs.
 #
 # Usage: ./push_desktop.sh [--win] [--no-build] [--local] [--host user@server:/path]
 #   --win       also cross-build the Windows NSIS installer (needs wine)

desktop/README.md

@@ -49,7 +49,8 @@ npm run dist:all
 
 `deploy/build_desktop.sh` wraps the same commands, installs dependencies on
 first run and prints sizes plus SHA-256 sums for release notes. Nothing is
-published by it; `deploy/push_desktop.sh` is the one that feeds auto-updates.
+published by it; the CD workflow attaches the artifacts to the Gitea release,
+which is also the update feed.
 
 The Arch package can be installed and removed with pacman:
 
@@ -68,19 +69,29 @@ will warn, and it has not been smoke-tested on real Windows.
 
 The app checks only when asked (**J621 → Check for updates…** in the menu):
 Linux packages install through pacman/dpkg, which needs administrator rights,
-and the Windows build is unsigned, so nothing installs silently. The check
-reads `latest-linux.yml` / `latest.yml` from the feed configured in
-`electron-builder.yml` (`publish.url`, baked into `app-update.yml`); set
-`J621_UPDATE_URL` to point a build at another feed (the smoke test uses this).
+and the Windows build is unsigned, so nothing installs silently.
+
+The check resolves the feed itself: it asks the Gitea API for the newest
+non-draft `desktop-v*` release (`J621_UPDATE_REPO`, default
+`https://gitea.rainbow-herring.ts.net/jakebreath/j621` — lowercase on purpose,
+the API path is case-sensitive), picks the `latest-linux.yml` / `latest.yml`
+asset for the platform and uses that release as an electron-updater generic
+feed. The baked `publish.url` in `electron-builder.yml` is metadata only.
+`J621_UPDATE_URL` overrides the whole lookup (the smoke test uses this).
 
 Publishing a release:
 
 1. Bump `version` in `desktop/package.json` — that is what the updater compares.
-2. `./deploy/push_desktop.sh --win` builds deb/pacman/NSIS and copies the
-   artifacts plus both channel files into `deploy/data/desktop/`, which the
-   frontend nginx serves read-only at `/desktop/`.
+2. Run the manual CD workflow, which builds the packages and attaches them
+   plus both channel files to the Gitea release `desktop-v<version>`.
+   `./deploy/push_desktop.sh --win` does the same build locally (and can also
+   copy the files to the website feed, which is optional now).
 3. Existing installs find the new version on their next manual check.
 
+Note for the 0.1.1 → 0.1.2 step: 0.1.1 only knows the old `/desktop/` feed, so
+publish 0.1.2 there once (`./deploy/push_desktop.sh --no-build`, or install it
+manually). From 0.1.2 on, updates come from Gitea.
+
 `package-type` in the app resources tells electron-updater whether to run
 `pacman -U` or `dpkg -i` (both via pkexec/sudo); the per-user NSIS install
 updates without elevation.

desktop/electron-builder.yml

@@ -2,12 +2,13 @@ appId: io.j621.desktop
 productName: J621
 copyright: Copyright (c) 2026 JakeBreath — Jake Labs Non-Commercial Software Licence
 
-# Update feed served by the frontend nginx (deploy/data/desktop, published
-# with deploy/push_desktop.sh). Baked into resources/app-update.yml; override
-# at runtime with J621_UPDATE_URL for a fork or a test feed.
+# Update feed: desktop/src/main.ts resolves the newest desktop-v* release on
+# Gitea at check time (J621_UPDATE_REPO). This block only tells electron-builder
+# to emit latest.yml/latest-linux.yml next to the installers; J621_UPDATE_URL
+# overrides the feed for a fork or a test.
 publish:
   provider: generic
-  url: https://j621.rainbow-herring.ts.net/desktop
+  url: https://gitea.rainbow-herring.ts.net/JakeBreath/J621/releases
 
 directories:
   output: release

desktop/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "j621-desktop",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "j621-desktop",
-      "version": "0.1.1",
+      "version": "0.1.2",
       "license": "LicenseRef-Jake-Labs-Non-Commercial",
       "dependencies": {
         "electron-updater": "^6.8.9"

desktop/package.json

@@ -1,7 +1,7 @@
 {
   "name": "j621-desktop",
   "productName": "J621",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "private": true,
   "description": "Desktop shell for the J621 self-hosted media archive",
   "author": {

desktop/src/main.ts

@@ -238,8 +238,9 @@ function isDownloadNavigation(url: URL): boolean {
 /**
  * Updates are manual by design: Linux packages install through pacman/dpkg
  * (pkexec/sudo) and the Windows build is unsigned, so the app asks before
- * downloading and again before installing. The feed comes from `publish` in
- * electron-builder.yml and can be overridden with J621_UPDATE_URL.
+ * downloading and again before installing. The feed is resolved at check time
+ * from the newest `desktop-v*` release on Gitea (`J621_UPDATE_REPO`);
+ * `J621_UPDATE_URL` overrides it for forks and the smoke test.
  */
 type UpdateEvent =
   | { state: "available"; version: string }
@@ -250,9 +251,84 @@ type UpdateEvent =
 let updateReporter: ((event: UpdateEvent) => void) | null = null;
 let updateCheckRunning = false;
 
-function setUpUpdates(win: BrowserWindow): void {
+const UPDATE_REPO =
+  process.env.J621_UPDATE_REPO?.trim() ||
+  "https://gitea.rainbow-herring.ts.net/jakebreath/j621";
+
+interface ReleaseAsset {
+  name: string;
+  browser_download_url: string;
+}
+
+interface Release {
+  tag_name: string;
+  draft: boolean;
+  prerelease: boolean;
+  assets?: ReleaseAsset[];
+}
+
+function releaseVersion(tag: string): [number, number, number] | null {
+  const match = /^desktop-v(\d+)\.(\d+)\.(\d+)$/.exec(tag);
+  if (!match) return null;
+  return [Number(match[1]), Number(match[2]), Number(match[3])];
+}
+
+function compareVersions(
+  a: [number, number, number],
+  b: [number, number, number],
+): number {
+  for (let index = 0; index < 3; index += 1) {
+    if (a[index] !== b[index]) return a[index] - b[index];
+  }
+  return 0;
+}
+
+/**
+ * Resolve the generic feed base electron-updater should use.
+ *
+ * Gitea's API path is case-sensitive (owner/repo must match the login), while
+ * the asset URLs it returns are canonical, so the base is derived from the
+ * platform's metadata asset (`latest-linux.yml` / `latest.yml`).
+ */
+async function resolveReleaseFeed(): Promise<string> {
   const override = process.env.J621_UPDATE_URL?.trim();
-  if (override) autoUpdater.setFeedURL({ provider: "generic", url: override });
+  if (override) return override;
+  const match = /^(https?:\/\/[^/]+)\/([^/]+)\/([^/]+?)\/?$/.exec(UPDATE_REPO);
+  if (!match) {
+    throw new Error(
+      `J621_UPDATE_REPO must be <origin>/<owner>/<repo> (got ${UPDATE_REPO}).`,
+    );
+  }
+  const [, origin, owner, repo] = match;
+  const response = await fetch(
+    `${origin}/api/v1/repos/${owner}/${repo}/releases?limit=50`,
+    { headers: { Accept: "application/json" } },
+  );
+  if (!response.ok) {
+    throw new Error(`Release lookup on Gitea failed (HTTP ${response.status}).`);
+  }
+  const releases = (await response.json()) as Release[];
+  const assetName =
+    process.platform === "win32" ? "latest.yml" : "latest-linux.yml";
+  let best: { version: [number, number, number]; asset: ReleaseAsset } | null =
+    null;
+  for (const release of releases) {
+    if (release.draft || release.prerelease) continue;
+    const version = releaseVersion(release.tag_name);
+    if (!version) continue;
+    const asset = release.assets?.find((entry) => entry.name === assetName);
+    if (!asset) continue;
+    if (!best || compareVersions(version, best.version) > 0) {
+      best = { version, asset };
+    }
+  }
+  if (!best) {
+    throw new Error(`No ${assetName} asset found in ${UPDATE_REPO} releases.`);
+  }
+  return best.asset.browser_download_url.replace(/\/[^/]*$/, "");
+}
+
+function setUpUpdates(win: BrowserWindow): void {
   if (!app.isPackaged) autoUpdater.forceDevUpdateConfig = true;
   autoUpdater.autoDownload = false;
   autoUpdater.autoInstallOnAppQuit = false;
@@ -336,6 +412,8 @@ async function checkForUpdates(win: BrowserWindow): Promise<void> {
   if (updateCheckRunning) return;
   updateCheckRunning = true;
   try {
+    const feed = await resolveReleaseFeed();
+    autoUpdater.setFeedURL({ provider: "generic", url: feed });
     await autoUpdater.checkForUpdates();
   } catch (error) {
     const message = error instanceof Error ? error.message : String(error);

frontend/src/components/AppShell.tsx

@@ -113,7 +113,7 @@ export function AppShell() {
   return (
     <div className="flex min-h-screen flex-col">
       <header className="sticky top-0 z-40 border-b border-ctp-surface0 bg-ctp-crust/95 backdrop-blur">
-        <div className="mx-auto flex h-14 w-full max-w-[1600px] items-center gap-4 px-4">
+        <div className="flex h-14 w-full items-center gap-4 px-3 sm:px-4">
           <Link to="/" className="flex shrink-0 items-center">
             <span className="rounded bg-ctp-mauve px-2 py-1 font-mono text-xs font-bold tracking-wide text-ctp-crust">
               J621

frontend/src/components/MediaCard.tsx

@@ -18,9 +18,9 @@ const ratingLabels: Record<string, string> = {
 };
 
 export function MediaCard({ item }: { item: MediaItem }) {
-  const preview = apiUrl(
-    item.kind === "video" ? item.thumbnail_url : item.raw_url,
-  );
+  // The thumbnail endpoint now builds real 480px previews for images too, so
+  // the grid no longer pulls full-size originals.
+  const preview = apiUrl(item.thumbnail_url);
   const rating = item.display_rating;
 
   return (

frontend/src/features/follows/FollowedPage.tsx

@@ -1,5 +1,5 @@
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
-import { Eye, StarOff } from "lucide-react";
+import { ChevronDown, ChevronRight, Eye, StarOff } from "lucide-react";
 import { useState } from "react";
 import { Link } from "react-router-dom";
 
@@ -148,48 +148,65 @@ function BlacklistCloudPanel() {
       q.state.data?.status === "building" ? 2000 : false,
   });
   const cloud = query.data;
+  const [expanded, setExpanded] = useState(false);
 
   return (
     <section className="rounded-lg border border-ctp-surface0 bg-ctp-base p-4">
-      <div className="flex flex-wrap items-center justify-between gap-2">
+      <button
+        type="button"
+        onClick={() => setExpanded((value) => !value)}
+        title={expanded ? "Hide the tags" : "Show the tags"}
+        className="flex w-full items-center justify-between gap-2 text-left"
+      >
         <h2 className="text-sm font-semibold text-ctp-subtext1">
           Blacklisted tags
         </h2>
-        <p className="text-xs text-ctp-overlay0">
-          {cloud?.source === "user"
-            ? "From your e621 blacklist"
-            : "From e621's anonymous default blacklist"}
-          {cloud ? ` · ${cloud.blacklist_count} entries` : ""}
-          {cloud ? ` · ${cloud.posts} feed post(s) scanned` : ""}
-          {cloud?.computed_at ? ` · computed ${formatDate(cloud.computed_at)}` : ""}
+        <span className="flex items-center gap-1.5 font-mono text-[11px] text-ctp-overlay0">
+          {cloud ? `${cloud.blacklist_count} entries` : "…"}
           {cloud?.status === "building" ? (
-            <span className="ml-2 inline-flex items-center gap-1.5">
-              <Spinner className="h-3 w-3" /> building…
-            </span>
+            <Spinner className="h-3 w-3" />
           ) : null}
-        </p>
-      </div>
+          {expanded ? (
+            <ChevronDown className="h-3.5 w-3.5" />
+          ) : (
+            <ChevronRight className="h-3.5 w-3.5" />
+          )}
+        </span>
+      </button>
 
-      {query.isPending ? (
-        <div className="mt-3 flex justify-center py-4">
-          <Spinner className="h-4 w-4" />
-        </div>
-      ) : cloud && cloud.tags.length > 0 ? (
-        <div className="mt-3 flex flex-wrap gap-1.5">
-          {cloud.tags.map(([tag, count]) => (
-            <span
-              key={tag}
-              className="rounded border border-ctp-red/30 bg-ctp-red/10 px-1.5 py-0.5 font-mono text-[11px] text-ctp-red"
-            >
-              {tag} ({count})
-            </span>
-          ))}
-        </div>
-      ) : (
-        <p className="mt-3 text-xs text-ctp-overlay0">
-          No blacklisted tags in your feeds.
-        </p>
-      )}
+      {expanded ? (
+        <>
+          <p className="mt-2 text-xs text-ctp-overlay0">
+            {cloud?.source === "user"
+              ? "From your e621 blacklist"
+              : "From e621's anonymous default blacklist"}
+            {cloud ? ` · ${cloud.posts} feed post(s) scanned` : ""}
+            {cloud?.computed_at
+              ? ` · computed ${formatDate(cloud.computed_at)}`
+              : ""}
+          </p>
+          {query.isPending ? (
+            <div className="mt-3 flex justify-center py-4">
+              <Spinner className="h-4 w-4" />
+            </div>
+          ) : cloud && cloud.tags.length > 0 ? (
+            <div className="mt-3 flex flex-wrap gap-1.5">
+              {cloud.tags.map(([tag, count]) => (
+                <span
+                  key={tag}
+                  className="rounded border border-ctp-red/30 bg-ctp-red/10 px-1.5 py-0.5 font-mono text-[11px] text-ctp-red"
+                >
+                  {tag} ({count})
+                </span>
+              ))}
+            </div>
+          ) : (
+            <p className="mt-3 text-xs text-ctp-overlay0">
+              No blacklisted tags in your feeds.
+            </p>
+          )}
+        </>
+      ) : null}
     </section>
   );
 }

frontend/src/features/online/OnlinePage.tsx

@@ -1,5 +1,5 @@
 import { keepPreviousData, useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
-import { X } from "lucide-react";
+import { ChevronDown, ChevronRight, X } from "lucide-react";
 import { useEffect, useMemo, useRef, useState } from "react";
 import { Link, useLocation, useSearchParams } from "react-router-dom";
 
@@ -43,6 +43,7 @@ export default function OnlinePage() {
   const queryClient = useQueryClient();
   const [draft, setDraft] = useState<string | null>(null);
   const [blacklistDraft, setBlacklistDraft] = useState("");
+  const [showBlacklist, setShowBlacklist] = useState(false);
   const tagInput = draft ?? tags;
   const zoom = useUi((state) => state.zoom);
   const perPage = useUi((state) => state.e621PerPage);
@@ -271,73 +272,91 @@ export default function OnlinePage() {
         </div>
 
         <div className="flex flex-col gap-2">
-          <span className="text-xs font-medium uppercase tracking-wide text-ctp-overlay1">
-            Your blacklist
-          </span>
-          {credentials?.configured ? (
-            <>
-              {blacklistEntries.length > 0 ? (
-                <div className="flex flex-wrap gap-1.5">
-                  {blacklistEntries.map(({ line, index }) => (
-                    <span
-                      key={`${line}-${index}`}
-                      className="inline-flex items-center gap-1 rounded border border-ctp-red/30 bg-ctp-red/10 px-1.5 py-0.5 font-mono text-[11px] text-ctp-red"
-                    >
-                      {line}
-                      <button
-                        type="button"
-                        title={`Remove ${line}`}
-                        disabled={blacklistMutation.isPending}
-                        onClick={() => removeBlacklistEntry(index)}
-                        className="text-ctp-red/70 transition hover:text-ctp-red disabled:opacity-40"
-                      >
-                        <X className="h-3 w-3" />
-                      </button>
-                    </span>
-                  ))}
-                </div>
+          <button
+            type="button"
+            onClick={() => setShowBlacklist((value) => !value)}
+            title={showBlacklist ? "Hide the blacklist" : "Show the blacklist"}
+            className="flex items-center justify-between gap-2 text-left"
+          >
+            <span className="text-xs font-medium uppercase tracking-wide text-ctp-overlay1">
+              Your blacklist
+            </span>
+            <span className="flex items-center gap-1 font-mono text-[11px] text-ctp-overlay0">
+              {blacklistEntries.length} tag
+              {blacklistEntries.length === 1 ? "" : "s"}
+              {showBlacklist ? (
+                <ChevronDown className="h-3.5 w-3.5" />
               ) : (
-                <p className="text-xs text-ctp-overlay0">
-                  No blacklisted tags.
-                </p>
+                <ChevronRight className="h-3.5 w-3.5" />
               )}
-              <form
-                onSubmit={(event) => {
-                  event.preventDefault();
-                  addBlacklistEntry();
-                }}
-                className="flex gap-2"
-              >
-                <input
-                  className={cn(inputClass, "font-mono")}
-                  placeholder="Add a tag…"
-                  value={blacklistDraft}
-                  onChange={(event) => setBlacklistDraft(event.target.value)}
-                />
-                <Button
-                  type="submit"
-                  variant="secondary"
-                  disabled={!blacklistDraft.trim() || blacklistMutation.isPending}
+            </span>
+          </button>
+          {showBlacklist ? (
+            credentials?.configured ? (
+              <>
+                {blacklistEntries.length > 0 ? (
+                  <div className="flex flex-wrap gap-1.5">
+                    {blacklistEntries.map(({ line, index }) => (
+                      <span
+                        key={`${line}-${index}`}
+                        className="inline-flex items-center gap-1 rounded border border-ctp-red/30 bg-ctp-red/10 px-1.5 py-0.5 font-mono text-[11px] text-ctp-red"
+                      >
+                        {line}
+                        <button
+                          type="button"
+                          title={`Remove ${line}`}
+                          disabled={blacklistMutation.isPending}
+                          onClick={() => removeBlacklistEntry(index)}
+                          className="text-ctp-red/70 transition hover:text-ctp-red disabled:opacity-40"
+                        >
+                          <X className="h-3 w-3" />
+                        </button>
+                      </span>
+                    ))}
+                  </div>
+                ) : (
+                  <p className="text-xs text-ctp-overlay0">
+                    No blacklisted tags.
+                  </p>
+                )}
+                <form
+                  onSubmit={(event) => {
+                    event.preventDefault();
+                    addBlacklistEntry();
+                  }}
+                  className="flex gap-2"
                 >
-                  {blacklistMutation.isPending ? (
-                    <Spinner className="h-3.5 w-3.5" />
-                  ) : (
-                    "Add"
-                  )}
-                </Button>
-              </form>
-              <p className="text-[11px] text-ctp-overlay0">
-                Saved to your e621 account.
+                  <input
+                    className={cn(inputClass, "font-mono")}
+                    placeholder="Add a tag…"
+                    value={blacklistDraft}
+                    onChange={(event) => setBlacklistDraft(event.target.value)}
+                  />
+                  <Button
+                    type="submit"
+                    variant="secondary"
+                    disabled={!blacklistDraft.trim() || blacklistMutation.isPending}
+                  >
+                    {blacklistMutation.isPending ? (
+                      <Spinner className="h-3.5 w-3.5" />
+                    ) : (
+                      "Add"
+                    )}
+                  </Button>
+                </form>
+                <p className="text-[11px] text-ctp-overlay0">
+                  Saved to your e621 account.
+                </p>
+              </>
+            ) : (
+              <p className="text-xs text-ctp-overlay0">
+                <Link to="/account" className="text-ctp-blue hover:underline">
+                  Add e621 credentials
+                </Link>{" "}
+                to manage your blacklist.
               </p>
-            </>
-          ) : (
-            <p className="text-xs text-ctp-overlay0">
-              <Link to="/account" className="text-ctp-blue hover:underline">
-                Add e621 credentials
-              </Link>{" "}
-              to manage your blacklist.
-            </p>
-          )}
+            )
+          ) : null}
         </div>
 
         <div className="flex flex-col gap-2">

frontend/src/lib/types.ts

@@ -388,6 +388,28 @@ export interface TempUpload {
   updated_at: string;
 }
 
+/** One upload the pipeline indexed while the page was watching. */
+export interface UploadCompletion {
+  id: string;
+  filename: string;
+  j_id: string;
+  resolution: string;
+  post_id: number | null;
+  thumbnail_url: string | null;
+  at: string;
+}
+
+/** Response of POST /api/uploads/ — a pending row or an instant completion. */
+export interface UploadStagingResult {
+  temp_id: string;
+  original_filename: string;
+  status: "pending" | "visual_match" | "completed" | "error";
+  resolution: string;
+  library_j_id: string | null;
+  preview_url: string | null;
+  e621_post_id?: number | null;
+}
+
 /** Progress of the server-side staged-upload pipeline. */
 export interface UploadStatus {
   status: "idle" | "running" | "paused" | "error";
@@ -400,6 +422,8 @@ export interface UploadStatus {
   error: string;
   outstanding: number;
   waiting: { md5: number; visual: number; iqdb: number };
+  /** Session notification feed: indexed uploads, newest first. */
+  recent_completions: UploadCompletion[];
   updated_at: string | null;
 }