feat: add package grouping for Telegram album files

Groups related packages posted together in Telegram channels.
Auto-detects albums via media_album_id, supports manual grouping
from UI. Groups appear as collapsible rows in STL files table.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

prisma/migrations/20260325212128_add_package_groups/migration.sql

@@ -0,0 +1,30 @@
+-- AlterTable
+ALTER TABLE "packages" ADD COLUMN     "packageGroupId" TEXT;
+
+-- CreateTable
+CREATE TABLE "package_groups" (
+    "id" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "mediaAlbumId" TEXT,
+    "sourceChannelId" TEXT NOT NULL,
+    "previewData" BYTEA,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "package_groups_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "package_groups_sourceChannelId_idx" ON "package_groups"("sourceChannelId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "package_groups_mediaAlbumId_sourceChannelId_key" ON "package_groups"("mediaAlbumId", "sourceChannelId");
+
+-- CreateIndex
+CREATE INDEX "packages_packageGroupId_idx" ON "packages"("packageGroupId");
+
+-- AddForeignKey
+ALTER TABLE "packages" ADD CONSTRAINT "packages_packageGroupId_fkey" FOREIGN KEY ("packageGroupId") REFERENCES "package_groups"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "package_groups" ADD CONSTRAINT "package_groups_sourceChannelId_fkey" FOREIGN KEY ("sourceChannelId") REFERENCES "telegram_channels"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/schema.prisma

@@ -432,6 +432,7 @@ model TelegramChannel {
   accountMaps     AccountChannelMap[]
   packages        Package[]
   skippedPackages SkippedPackage[]
+  packageGroups   PackageGroup[]
 
   @@index([type, isActive])
   @@index([category])
@@ -474,10 +475,12 @@ model Package {
   tags            String[]    @default([])
   previewData     Bytes?      // JPEG thumbnail from nearby Telegram photo (stored as raw bytes)
   previewMsgId    BigInt?     // Telegram message ID of the matched photo
+  packageGroupId  String?
   indexedAt        DateTime   @default(now())
   createdAt       DateTime    @default(now())
 
   sourceChannel   TelegramChannel      @relation(fields: [sourceChannelId], references: [id])
+  packageGroup    PackageGroup?        @relation(fields: [packageGroupId], references: [id], onDelete: SetNull)
   files           PackageFile[]
   ingestionRun    IngestionRun?        @relation(fields: [ingestionRunId], references: [id])
   ingestionRunId  String?
@@ -491,6 +494,7 @@ model Package {
   @@index([indexedAt])
   @@index([archiveType])
   @@index([creator])
+  @@index([packageGroupId])
   @@map("packages")
 }
 
@@ -512,6 +516,23 @@ model PackageFile {
   @@map("package_files")
 }
 
+model PackageGroup {
+  id              String           @id @default(cuid())
+  name            String
+  mediaAlbumId    String?
+  sourceChannelId String
+  previewData     Bytes?
+  createdAt       DateTime         @default(now())
+  updatedAt       DateTime         @updatedAt
+
+  packages        Package[]
+  sourceChannel   TelegramChannel  @relation(fields: [sourceChannelId], references: [id], onDelete: Cascade)
+
+  @@unique([mediaAlbumId, sourceChannelId])
+  @@index([sourceChannelId])
+  @@map("package_groups")
+}
+
 model IngestionRun {
   id              String          @id @default(cuid())
   accountId       String

src/app/(app)/stls/_components/package-columns.tsx

@@ -1,10 +1,11 @@
 "use client";
 
 import { type ColumnDef } from "@tanstack/react-table";
-import { FileArchive, Eye } from "lucide-react";
+import { FileArchive, Eye, ChevronRight, Layers, Ungroup, Send, ImagePlus } from "lucide-react";
 import { DataTableColumnHeader } from "@/components/shared/data-table-column-header";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
+import { Checkbox } from "@/components/ui/checkbox";
 import { SendToTelegramButton } from "./send-to-telegram-button";
 
 export interface PackageRow {
@@ -25,6 +26,34 @@ export interface PackageRow {
   };
   matchedFileCount: number;
   matchedByContent: boolean;
+  packageGroupId?: string | null;
+}
+
+export interface GroupHeaderRow {
+  _rowType: "group";
+  id: string;
+  name: string;
+  hasPreview: boolean;
+  totalFileSize: string;
+  totalFileCount: number;
+  packageCount: number;
+  combinedTags: string[];
+  archiveTypes: ("ZIP" | "RAR" | "SEVEN_Z" | "DOCUMENT")[];
+  latestIndexedAt: string;
+  sourceChannel: { id: string; title: string };
+  _expanded: boolean;
+}
+
+export interface PackageTableRow extends PackageRow {
+  _rowType: "package";
+  _groupId: string | null;
+  _isGroupMember: boolean;
+}
+
+export type StlTableRow = GroupHeaderRow | PackageTableRow;
+
+function isGroupRow(row: StlTableRow): row is GroupHeaderRow {
+  return row._rowType === "group";
 }
 
 interface PackageColumnsProps {
@@ -32,9 +61,17 @@ interface PackageColumnsProps {
   onSetCreator: (pkg: PackageRow) => void;
   onSetTags: (pkg: PackageRow) => void;
   searchTerm: string;
+  onToggleGroup: (groupId: string) => void;
+  onRenameGroup: (groupId: string, currentName: string) => void;
+  onDissolveGroup: (groupId: string) => void;
+  onSendAllInGroup: (groupId: string) => void;
+  onRemoveFromGroup: (packageId: string) => void;
+  onGroupPreviewUpload: (groupId: string) => void;
+  selectedPackages: Set<string>;
+  onToggleSelect: (packageId: string) => void;
 }
 
-function formatBytes(bytesStr: string): string {
+export function formatBytes(bytesStr: string): string {
   const bytes = Number(bytesStr);
   if (bytes === 0) return "0 B";
   const k = 1024;
@@ -61,107 +98,254 @@ function PreviewCell({ pkg }: { pkg: PackageRow }) {
   );
 }
 
+function GroupPreviewCell({
+  group,
+  onUpload,
+}: {
+  group: GroupHeaderRow;
+  onUpload: (groupId: string) => void;
+}) {
+  if (group.hasPreview) {
+    return (
+      <button
+        className="relative group/preview cursor-pointer"
+        onClick={() => onUpload(group.id)}
+        title="Click to change preview image"
+      >
+        <img
+          src={`/api/groups/${group.id}/preview`}
+          alt=""
+          className="h-9 w-9 rounded-md object-cover bg-muted"
+          loading="lazy"
+        />
+        <div className="absolute inset-0 flex items-center justify-center rounded-md bg-black/50 opacity-0 group-hover/preview:opacity-100 transition-opacity">
+          <ImagePlus className="h-3.5 w-3.5 text-white" />
+        </div>
+      </button>
+    );
+  }
+  return (
+    <button
+      className="flex h-9 w-9 items-center justify-center rounded-md bg-muted hover:bg-muted/80 transition-colors cursor-pointer"
+      onClick={() => onUpload(group.id)}
+      title="Click to add preview image"
+    >
+      <Layers className="h-4 w-4 text-muted-foreground" />
+    </button>
+  );
+}
+
 export function getPackageColumns({
   onViewFiles,
   onSetCreator,
   onSetTags,
   searchTerm,
-}: PackageColumnsProps): ColumnDef<PackageRow, unknown>[] {
+  onToggleGroup,
+  onRenameGroup,
+  onDissolveGroup,
+  onSendAllInGroup,
+  onRemoveFromGroup,
+  onGroupPreviewUpload,
+  selectedPackages,
+  onToggleSelect,
+}: PackageColumnsProps): ColumnDef<StlTableRow, unknown>[] {
   return [
+    {
+      id: "select",
+      header: "",
+      cell: ({ row }) => {
+        const data = row.original;
+        if (isGroupRow(data)) return null;
+        return (
+          <Checkbox
+            checked={selectedPackages.has(data.id)}
+            onCheckedChange={() => onToggleSelect(data.id)}
+            aria-label="Select package"
+            className="translate-y-[2px]"
+          />
+        );
+      },
+      enableHiding: false,
+      enableSorting: false,
+      size: 32,
+    },
     {
       id: "preview",
       header: "",
-      cell: ({ row }) => <PreviewCell pkg={row.original} />,
+      cell: ({ row }) => {
+        const data = row.original;
+        if (isGroupRow(data)) {
+          return (
+            <div className="flex items-center gap-1">
+              <button
+                className="shrink-0 p-0.5 cursor-pointer"
+                onClick={() => onToggleGroup(data.id)}
+                aria-label={data._expanded ? "Collapse group" : "Expand group"}
+              >
+                <ChevronRight
+                  className={`h-4 w-4 text-muted-foreground transition-transform ${
+                    data._expanded ? "rotate-90" : ""
+                  }`}
+                />
+              </button>
+              <GroupPreviewCell group={data} onUpload={onGroupPreviewUpload} />
+            </div>
+          );
+        }
+        return (
+          <div className={data._isGroupMember ? "pl-5" : ""}>
+            <PreviewCell pkg={data} />
+          </div>
+        );
+      },
       enableHiding: false,
       enableSorting: false,
-      size: 52,
+      size: 72,
     },
     {
       accessorKey: "fileName",
       header: ({ column }) => <DataTableColumnHeader column={column} title="File Name" />,
-      cell: ({ row }) => (
+      cell: ({ row }) => {
+        const data = row.original;
+        if (isGroupRow(data)) {
+          return (
             <div className="min-w-0">
               <div className="flex items-center gap-2">
-            <span className="font-medium truncate max-w-[300px]">{row.original.fileName}</span>
+                <button
-            {row.original.isMultipart && (
+                  className="font-semibold truncate max-w-[300px] cursor-pointer hover:underline text-left"
+                  onClick={() => onRenameGroup(data.id, data.name)}
+                  title="Click to rename group"
+                >
+                  {data.name}
+                </button>
+                <Badge variant="secondary" className="text-[10px] shrink-0">
+                  {data.packageCount} pkg{data.packageCount !== 1 ? "s" : ""}
+                </Badge>
+              </div>
+            </div>
+          );
+        }
+        return (
+          <div className="min-w-0">
+            <div className="flex items-center gap-2">
+              <span className="font-medium truncate max-w-[300px]">{data.fileName}</span>
+              {data.isMultipart && (
                 <Badge variant="outline" className="text-[10px] shrink-0">
                   Multi
                 </Badge>
               )}
             </div>
-          {searchTerm && row.original.matchedByContent && (
+            {searchTerm && data.matchedByContent && (
               <button
                 className="text-[11px] text-amber-500 hover:text-amber-400 hover:underline cursor-pointer mt-0.5"
-              onClick={() => onViewFiles(row.original)}
+                onClick={() => onViewFiles(data)}
               >
-              {row.original.matchedFileCount.toLocaleString()} file match{row.original.matchedFileCount !== 1 ? "es" : ""}
+                {data.matchedFileCount.toLocaleString()} file match{data.matchedFileCount !== 1 ? "es" : ""}
               </button>
             )}
           </div>
-      ),
+        );
+      },
       enableHiding: false,
     },
     {
       accessorKey: "archiveType",
       header: ({ column }) => <DataTableColumnHeader column={column} title="Type" />,
-      cell: ({ row }) => (
+      cell: ({ row }) => {
+        const data = row.original;
+        if (isGroupRow(data)) {
+          const types = data.archiveTypes;
+          if (types.length === 1) {
+            return (
               <Badge variant="secondary" className="text-[10px]">
-          {row.original.archiveType}
+                {types[0]}
               </Badge>
-      ),
+            );
+          }
+          return (
+            <Badge variant="secondary" className="text-[10px]">
+              Mixed
+            </Badge>
+          );
+        }
+        return (
+          <Badge variant="secondary" className="text-[10px]">
+            {data.archiveType}
+          </Badge>
+        );
+      },
     },
     {
       accessorKey: "fileSize",
       header: ({ column }) => <DataTableColumnHeader column={column} title="Size" />,
-      cell: ({ row }) => (
+      cell: ({ row }) => {
+        const data = row.original;
+        const size = isGroupRow(data) ? data.totalFileSize : data.fileSize;
+        return (
           <span className="text-sm text-muted-foreground">
-          {formatBytes(row.original.fileSize)}
+            {formatBytes(size)}
           </span>
-      ),
+        );
+      },
     },
     {
       accessorKey: "fileCount",
       header: ({ column }) => <DataTableColumnHeader column={column} title="Files" />,
-      cell: ({ row }) => (
+      cell: ({ row }) => {
+        const data = row.original;
+        const count = isGroupRow(data) ? data.totalFileCount : data.fileCount;
+        return (
           <span className="text-sm">
-          {row.original.fileCount.toLocaleString()}
+            {count.toLocaleString()}
           </span>
-      ),
+        );
+      },
     },
     {
       accessorKey: "creator",
       header: ({ column }) => <DataTableColumnHeader column={column} title="Creator" />,
-      cell: ({ row }) => (
+      cell: ({ row }) => {
+        const data = row.original;
+        if (isGroupRow(data)) {
+          return <span className="text-sm text-muted-foreground">{"\u2014"}</span>;
+        }
+        return (
           <button
             className="text-sm text-muted-foreground truncate max-w-[160px] block hover:text-foreground hover:underline cursor-pointer text-left"
-          onClick={() => onSetCreator(row.original)}
+            onClick={() => onSetCreator(data)}
             title="Click to edit creator"
           >
-          {row.original.creator || "\u2014"}
+            {data.creator || "\u2014"}
           </button>
-      ),
+        );
+      },
     },
     {
       id: "tags",
       header: ({ column }) => <DataTableColumnHeader column={column} title="Tags" />,
       cell: ({ row }) => {
-        const tags = row.original.tags;
+        const data = row.original;
+        const tags = isGroupRow(data) ? data.combinedTags : data.tags;
         if (tags.length === 0) {
+          if (isGroupRow(data)) {
+            return <span className="text-sm text-muted-foreground">{"\u2014"}</span>;
+          }
           return (
             <button
               className="text-sm text-muted-foreground hover:text-foreground cursor-pointer"
-              onClick={() => onSetTags(row.original)}
+              onClick={() => onSetTags(data)}
               title="Click to add tags"
             >
               {"\u2014"}
             </button>
           );
         }
+        const clickHandler = isGroupRow(data) ? undefined : () => onSetTags(data as PackageTableRow);
         return (
           <button
-            className="flex flex-wrap gap-1 cursor-pointer"
+            className={`flex flex-wrap gap-1 ${clickHandler ? "cursor-pointer" : "cursor-default"}`}
-            onClick={() => onSetTags(row.original)}
+            onClick={clickHandler}
-            title="Click to edit tags"
+            title={clickHandler ? "Click to edit tags" : undefined}
           >
             {tags.map((tag) => (
               <Badge
@@ -175,7 +359,10 @@ export function getPackageColumns({
           </button>
         );
       },
-      accessorFn: (row) => row.tags.join(", "),
+      accessorFn: (row) => {
+        if (isGroupRow(row)) return row.combinedTags.join(", ");
+        return row.tags.join(", ");
+      },
     },
     {
       id: "channel",
@@ -190,31 +377,73 @@ export function getPackageColumns({
     {
       accessorKey: "indexedAt",
       header: ({ column }) => <DataTableColumnHeader column={column} title="Indexed" />,
-      cell: ({ row }) => (
+      cell: ({ row }) => {
+        const data = row.original;
+        const date = isGroupRow(data) ? data.latestIndexedAt : data.indexedAt;
+        return (
           <span className="text-sm text-muted-foreground">
-          {new Date(row.original.indexedAt).toLocaleDateString()}
+            {new Date(date).toLocaleDateString()}
           </span>
-      ),
+        );
+      },
     },
     {
       id: "actions",
-      cell: ({ row }) => (
+      cell: ({ row }) => {
+        const data = row.original;
+        if (isGroupRow(data)) {
+          return (
+            <div className="flex items-center gap-0.5">
+              <Button
+                variant="ghost"
+                size="icon"
+                className="h-8 w-8"
+                onClick={() => onSendAllInGroup(data.id)}
+                title="Send all packages in group"
+              >
+                <Send className="h-4 w-4" />
+              </Button>
+              <Button
+                variant="ghost"
+                size="icon"
+                className="h-8 w-8"
+                onClick={() => onDissolveGroup(data.id)}
+                title="Dissolve group"
+              >
+                <Ungroup className="h-4 w-4" />
+              </Button>
+            </div>
+          );
+        }
+        return (
           <div className="flex items-center gap-0.5">
             <SendToTelegramButton
-            packageId={row.original.id}
+              packageId={data.id}
-            packageName={row.original.fileName}
+              packageName={data.fileName}
               variant="icon"
             />
             <Button
               variant="ghost"
               size="icon"
               className="h-8 w-8"
-            onClick={() => onViewFiles(row.original)}
+              onClick={() => onViewFiles(data)}
             >
               <Eye className="h-4 w-4" />
             </Button>
+            {data._isGroupMember && (
+              <Button
+                variant="ghost"
+                size="icon"
+                className="h-8 w-8"
+                onClick={() => onRemoveFromGroup(data.id)}
+                title="Remove from group"
+              >
+                <Ungroup className="h-3.5 w-3.5" />
+              </Button>
+            )}
           </div>
-      ),
+        );
+      },
       enableHiding: false,
     },
   ];

src/app/(app)/stls/_components/stl-table.tsx

@@ -1,11 +1,17 @@
 "use client";
 
-import { useState, useCallback, useTransition } from "react";
+import { useState, useCallback, useTransition, useMemo, useRef } from "react";
 import { useRouter, usePathname, useSearchParams } from "next/navigation";
 import { toast } from "sonner";
-import { Search } from "lucide-react";
+import { Search, Layers } from "lucide-react";
 import { useDataTable } from "@/hooks/use-data-table";
-import { getPackageColumns, type PackageRow } from "./package-columns";
+import {
+  getPackageColumns,
+  type PackageRow,
+  type StlTableRow,
+  type PackageTableRow,
+  type GroupHeaderRow,
+} from "./package-columns";
 import { PackageFilesDrawer } from "./package-files-drawer";
 import { IngestionStatus } from "./ingestion-status";
 import { SkippedPackagesTab } from "./skipped-packages-tab";
@@ -14,6 +20,7 @@ import { DataTablePagination } from "@/components/shared/data-table-pagination";
 import { DataTableViewOptions } from "@/components/shared/data-table-view-options";
 import { PageHeader } from "@/components/shared/page-header";
 import { Input } from "@/components/ui/input";
+import { Button } from "@/components/ui/button";
 import {
   Select,
   SelectContent,
@@ -21,14 +28,31 @@ import {
   SelectTrigger,
   SelectValue,
 } from "@/components/ui/select";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { Badge } from "@/components/ui/badge";
-import type { IngestionAccountStatus } from "@/lib/telegram/types";
+import type { DisplayItem, IngestionAccountStatus } from "@/lib/telegram/types";
 import type { SkippedRow } from "./skipped-columns";
-import { updatePackageCreator, updatePackageTags } from "../actions";
+import {
+  updatePackageCreator,
+  updatePackageTags,
+  renameGroupAction,
+  dissolveGroupAction,
+  createGroupAction,
+  removeFromGroupAction,
+  sendAllInGroupAction,
+  updateGroupPreviewAction,
+} from "../actions";
 
 interface StlTableProps {
-  data: PackageRow[];
+  data: DisplayItem[];
   pageCount: number;
   totalCount: number;
   ingestionStatus: IngestionAccountStatus[];
@@ -58,6 +82,88 @@ export function StlTable({
   const [viewPkg, setViewPkg] = useState<PackageRow | null>(null);
   const [, startTransition] = useTransition();
 
+  // Group expansion state
+  const [expandedGroups, setExpandedGroups] = useState<Set<string>>(new Set());
+
+  // Package selection state (for manual grouping)
+  const [selectedPackages, setSelectedPackages] = useState<Set<string>>(new Set());
+
+  // Create group dialog state
+  const [createGroupOpen, setCreateGroupOpen] = useState(false);
+  const [groupName, setGroupName] = useState("");
+
+  // Group preview upload ref
+  const previewInputRef = useRef<HTMLInputElement>(null);
+  const [uploadGroupId, setUploadGroupId] = useState<string | null>(null);
+
+  const toggleGroup = useCallback((groupId: string) => {
+    setExpandedGroups((prev) => {
+      const next = new Set(prev);
+      if (next.has(groupId)) {
+        next.delete(groupId);
+      } else {
+        next.add(groupId);
+      }
+      return next;
+    });
+  }, []);
+
+  const toggleSelect = useCallback((packageId: string) => {
+    setSelectedPackages((prev) => {
+      const next = new Set(prev);
+      if (next.has(packageId)) {
+        next.delete(packageId);
+      } else {
+        next.add(packageId);
+      }
+      return next;
+    });
+  }, []);
+
+  // Flatten DisplayItem[] into StlTableRow[] based on expansion state
+  const tableRows: StlTableRow[] = useMemo(() => {
+    const rows: StlTableRow[] = [];
+    for (const item of data) {
+      if (item.type === "package") {
+        rows.push({
+          ...item.data,
+          _rowType: "package" as const,
+          _groupId: null,
+          _isGroupMember: false,
+        });
+      } else {
+        const group = item.data;
+        const isExpanded = expandedGroups.has(group.id);
+        rows.push({
+          _rowType: "group" as const,
+          id: group.id,
+          name: group.name,
+          hasPreview: group.hasPreview,
+          totalFileSize: group.totalFileSize,
+          totalFileCount: group.totalFileCount,
+          packageCount: group.packageCount,
+          combinedTags: group.combinedTags,
+          archiveTypes: group.archiveTypes,
+          latestIndexedAt: group.latestIndexedAt,
+          sourceChannel: group.sourceChannel,
+          _expanded: isExpanded,
+        });
+        if (isExpanded) {
+          for (const pkg of group.packages) {
+            rows.push({
+              ...pkg,
+              _rowType: "package" as const,
+              _groupId: group.id,
+              _isGroupMember: true,
+              packageGroupId: group.id,
+            });
+          }
+        }
+      }
+    }
+    return rows;
+  }, [data, expandedGroups]);
+
   const updateSearch = useCallback(
     (value: string) => {
       setSearchValue(value);
@@ -103,6 +209,131 @@ export function StlTable({
     [router, pathname, searchParams]
   );
 
+  const handleRenameGroup = useCallback(
+    (groupId: string, currentName: string) => {
+      const value = prompt("Enter group name:", currentName);
+      if (value === null || value.trim() === currentName) return;
+      startTransition(async () => {
+        const result = await renameGroupAction(groupId, value);
+        if (result.success) {
+          toast.success(`Group renamed to "${value.trim()}"`);
+          router.refresh();
+        } else {
+          toast.error(result.error);
+        }
+      });
+    },
+    [router]
+  );
+
+  const handleDissolveGroup = useCallback(
+    (groupId: string) => {
+      if (!confirm("Dissolve this group? Packages will become standalone items.")) return;
+      startTransition(async () => {
+        const result = await dissolveGroupAction(groupId);
+        if (result.success) {
+          toast.success("Group dissolved");
+          setExpandedGroups((prev) => {
+            const next = new Set(prev);
+            next.delete(groupId);
+            return next;
+          });
+          router.refresh();
+        } else {
+          toast.error(result.error);
+        }
+      });
+    },
+    [router]
+  );
+
+  const handleSendAllInGroup = useCallback(
+    (groupId: string) => {
+      if (!confirm("Send all packages in this group to your Telegram?")) return;
+      startTransition(async () => {
+        const result = await sendAllInGroupAction(groupId);
+        if (result.success) {
+          toast.success("Group packages queued for sending");
+          router.refresh();
+        } else {
+          toast.error(result.error);
+        }
+      });
+    },
+    [router]
+  );
+
+  const handleRemoveFromGroup = useCallback(
+    (packageId: string) => {
+      startTransition(async () => {
+        const result = await removeFromGroupAction(packageId);
+        if (result.success) {
+          toast.success("Package removed from group");
+          router.refresh();
+        } else {
+          toast.error(result.error);
+        }
+      });
+    },
+    [router]
+  );
+
+  const handleCreateGroup = useCallback(() => {
+    if (selectedPackages.size < 2) return;
+    setGroupName("");
+    setCreateGroupOpen(true);
+  }, [selectedPackages.size]);
+
+  const submitCreateGroup = useCallback(() => {
+    if (!groupName.trim() || selectedPackages.size < 2) return;
+    const ids = Array.from(selectedPackages);
+    startTransition(async () => {
+      const result = await createGroupAction(groupName, ids);
+      if (result.success) {
+        toast.success(`Group "${groupName.trim()}" created`);
+        setSelectedPackages(new Set());
+        setCreateGroupOpen(false);
+        router.refresh();
+      } else {
+        toast.error(result.error);
+      }
+    });
+  }, [groupName, selectedPackages, router]);
+
+  // Group preview upload handler (Task 12)
+  const handleGroupPreviewUpload = useCallback((groupId: string) => {
+    setUploadGroupId(groupId);
+    // Trigger file input after state update
+    setTimeout(() => {
+      previewInputRef.current?.click();
+    }, 0);
+  }, []);
+
+  const handlePreviewFileChange = useCallback(
+    (e: React.ChangeEvent<HTMLInputElement>) => {
+      const file = e.target.files?.[0];
+      if (!file || !uploadGroupId) return;
+
+      const formData = new FormData();
+      formData.append("file", file);
+
+      startTransition(async () => {
+        const result = await updateGroupPreviewAction(uploadGroupId, formData);
+        if (result.success) {
+          toast.success("Group preview updated");
+          router.refresh();
+        } else {
+          toast.error(result.error);
+        }
+        setUploadGroupId(null);
+      });
+
+      // Reset input so the same file can be selected again
+      e.target.value = "";
+    },
+    [uploadGroupId, router]
+  );
+
   const columns = getPackageColumns({
     onViewFiles: (pkg) => setViewPkg(pkg),
     searchTerm,
@@ -136,9 +367,17 @@ export function StlTable({
         }
       });
     },
+    onToggleGroup: toggleGroup,
+    onRenameGroup: handleRenameGroup,
+    onDissolveGroup: handleDissolveGroup,
+    onSendAllInGroup: handleSendAllInGroup,
+    onRemoveFromGroup: handleRemoveFromGroup,
+    onGroupPreviewUpload: handleGroupPreviewUpload,
+    selectedPackages,
+    onToggleSelect: toggleSelect,
   });
 
-  const { table } = useDataTable({ data, columns, pageCount });
+  const { table } = useDataTable({ data: tableRows, columns, pageCount });
 
   const activeTag = searchParams.get("tag") ?? "";
 
@@ -191,11 +430,37 @@ export function StlTable({
               </Select>
             )}
             <DataTableViewOptions table={table} />
+            {selectedPackages.size >= 2 && (
+              <Button
+                variant="outline"
+                size="sm"
+                className="h-9 gap-1.5"
+                onClick={handleCreateGroup}
+              >
+                <Layers className="h-3.5 w-3.5" />
+                Group {selectedPackages.size} Selected
+              </Button>
+            )}
+            {selectedPackages.size > 0 && selectedPackages.size < 2 && (
+              <span className="text-xs text-muted-foreground">
+                Select at least 2 packages to group
+              </span>
+            )}
           </div>
 
           <DataTable
             table={table}
             emptyMessage="No packages found. Archives will appear here after ingestion."
+            rowClassName={(row) => {
+              const data = row.original as StlTableRow;
+              if (data._rowType === "group") {
+                return "bg-muted/30 border-border";
+              }
+              if (data._rowType === "package" && (data as PackageTableRow)._isGroupMember) {
+                return "bg-muted/10";
+              }
+              return "";
+            }}
           />
           <DataTablePagination table={table} totalCount={totalCount} />
         </TabsContent>
@@ -217,6 +482,47 @@ export function StlTable({
         }}
         highlightTerm={searchTerm}
       />
+
+      {/* Create Group Dialog */}
+      <Dialog open={createGroupOpen} onOpenChange={setCreateGroupOpen}>
+        <DialogContent className="sm:max-w-md">
+          <DialogHeader>
+            <DialogTitle>Create Package Group</DialogTitle>
+            <DialogDescription>
+              Group {selectedPackages.size} selected packages together. Enter a name for the group.
+            </DialogDescription>
+          </DialogHeader>
+          <div className="py-4">
+            <Input
+              placeholder="Group name..."
+              value={groupName}
+              onChange={(e) => setGroupName(e.target.value)}
+              onKeyDown={(e) => {
+                if (e.key === "Enter") submitCreateGroup();
+              }}
+              autoFocus
+            />
+          </div>
+          <DialogFooter>
+            <Button variant="outline" onClick={() => setCreateGroupOpen(false)}>
+              Cancel
+            </Button>
+            <Button onClick={submitCreateGroup} disabled={!groupName.trim()}>
+              <Layers className="h-4 w-4 mr-1" />
+              Create Group
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+
+      {/* Hidden file input for group preview upload (Task 12) */}
+      <input
+        ref={previewInputRef}
+        type="file"
+        accept="image/jpeg,image/png,image/webp"
+        className="hidden"
+        onChange={handlePreviewFileChange}
+      />
     </div>
   );
 }

src/app/(app)/stls/actions.ts

@@ -4,6 +4,13 @@ import { auth } from "@/lib/auth";
 import { prisma } from "@/lib/prisma";
 import type { ActionResult } from "@/types/api.types";
 import { revalidatePath } from "next/cache";
+import {
+  updatePackageGroupName,
+  updatePackageGroupPreview,
+  createManualGroup,
+  removePackageFromGroup,
+  dissolveGroup,
+} from "@/lib/telegram/queries";
 
 const ALLOWED_IMAGE_TYPES = [
   "image/jpeg",
@@ -322,3 +329,186 @@ export async function retryAllSkippedPackagesAction(
     return { success: false, error: "Failed to retry skipped packages" };
   }
 }
+
+export async function renameGroupAction(
+  groupId: string,
+  name: string
+): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  if (!name.trim()) {
+    return { success: false, error: "Group name cannot be empty" };
+  }
+
+  try {
+    await updatePackageGroupName(groupId, name);
+    revalidatePath("/stls");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to rename group" };
+  }
+}
+
+export async function dissolveGroupAction(
+  groupId: string
+): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  try {
+    await dissolveGroup(groupId);
+    revalidatePath("/stls");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to dissolve group" };
+  }
+}
+
+export async function createGroupAction(
+  name: string,
+  packageIds: string[]
+): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  if (!name.trim()) {
+    return { success: false, error: "Group name cannot be empty" };
+  }
+  if (packageIds.length < 2) {
+    return { success: false, error: "At least 2 packages are required to create a group" };
+  }
+
+  try {
+    await createManualGroup(name, packageIds);
+    revalidatePath("/stls");
+    return { success: true, data: undefined };
+  } catch (err) {
+    const message = err instanceof Error ? err.message : "Failed to create group";
+    return { success: false, error: message };
+  }
+}
+
+export async function removeFromGroupAction(
+  packageId: string
+): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  try {
+    await removePackageFromGroup(packageId);
+    revalidatePath("/stls");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to remove package from group" };
+  }
+}
+
+export async function updateGroupPreviewAction(
+  groupId: string,
+  formData: FormData
+): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const file = formData.get("file");
+  if (!(file instanceof File)) {
+    return { success: false, error: "No file provided" };
+  }
+
+  if (!ALLOWED_IMAGE_TYPES.includes(file.type as (typeof ALLOWED_IMAGE_TYPES)[number])) {
+    return { success: false, error: "Only JPG, PNG, and WebP images are accepted" };
+  }
+
+  if (file.size > MAX_IMAGE_SIZE) {
+    return { success: false, error: "Image must be smaller than 2 MB" };
+  }
+
+  try {
+    const arrayBuffer = await file.arrayBuffer();
+    const buffer = Buffer.from(arrayBuffer);
+    await updatePackageGroupPreview(groupId, buffer);
+    revalidatePath("/stls");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to upload group preview image" };
+  }
+}
+
+export async function sendAllInGroupAction(
+  groupId: string
+): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  try {
+    const telegramLink = await prisma.telegramLink.findUnique({
+      where: { userId: session.user.id },
+    });
+
+    if (!telegramLink) {
+      return { success: false, error: "No linked Telegram account. Link one in Settings." };
+    }
+
+    const group = await prisma.packageGroup.findUnique({
+      where: { id: groupId },
+      select: {
+        packages: {
+          select: { id: true, destChannelId: true, destMessageId: true, fileName: true },
+        },
+      },
+    });
+
+    if (!group) {
+      return { success: false, error: "Group not found" };
+    }
+
+    const sendablePackages = group.packages.filter(
+      (p) => p.destChannelId && p.destMessageId
+    );
+
+    if (sendablePackages.length === 0) {
+      return { success: false, error: "No packages in this group have been uploaded to a destination channel" };
+    }
+
+    let queued = 0;
+    for (const pkg of sendablePackages) {
+      // Only create if no existing PENDING/SENDING request for this package+link combo
+      const existing = await prisma.botSendRequest.findFirst({
+        where: {
+          packageId: pkg.id,
+          telegramLinkId: telegramLink.id,
+          status: { in: ["PENDING", "SENDING"] },
+        },
+      });
+
+      if (!existing) {
+        const sendRequest = await prisma.botSendRequest.create({
+          data: {
+            packageId: pkg.id,
+            telegramLinkId: telegramLink.id,
+            requestedByUserId: session.user.id,
+            status: "PENDING",
+          },
+        });
+
+        // Notify the bot via pg_notify
+        try {
+          await prisma.$queryRawUnsafe(
+            `SELECT pg_notify('bot_send', $1)`,
+            sendRequest.id
+          );
+        } catch {
+          // Best-effort — the bot also polls periodically
+        }
+
+        queued++;
+      }
+    }
+
+    revalidatePath("/stls");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to send group packages" };
+  }
+}

src/app/(app)/stls/page.tsx

@@ -1,7 +1,8 @@
 import { auth } from "@/lib/auth";
 import { redirect } from "next/navigation";
-import { listPackages, searchPackages, getIngestionStatus, getAllPackageTags, listSkippedPackages, countSkippedPackages } from "@/lib/telegram/queries";
+import { listDisplayItems, searchPackages, getIngestionStatus, getAllPackageTags, listSkippedPackages, countSkippedPackages } from "@/lib/telegram/queries";
 import { StlTable } from "./_components/stl-table";
+import type { DisplayItem, PackageListItem } from "@/lib/telegram/types";
 
 interface Props {
   searchParams: Promise<Record<string, string | string[] | undefined>>;
@@ -31,7 +32,7 @@ export default async function StlFilesPage({ searchParams }: Props) {
           limit: perPage,
           searchIn: "both",
         })
-      : listPackages({
+      : listDisplayItems({
           page,
           limit: perPage,
           creator,
@@ -44,6 +45,11 @@ export default async function StlFilesPage({ searchParams }: Props) {
     countSkippedPackages(),
   ]);
 
+  // For search results, wrap as DisplayItem[]; for non-search, already DisplayItem[]
+  const displayItems: DisplayItem[] = search
+    ? (result as { items: PackageListItem[] }).items.map((item) => ({ type: "package" as const, data: item }))
+    : (result as { items: DisplayItem[] }).items;
+
   // Fetch skipped packages only if on that tab
   const skippedResult = tab === "skipped"
     ? await listSkippedPackages({ page, limit: perPage })
@@ -51,7 +57,7 @@ export default async function StlFilesPage({ searchParams }: Props) {
 
   return (
     <StlTable
-      data={result.items}
+      data={displayItems}
       pageCount={result.pagination.totalPages}
       totalCount={result.pagination.total}
       ingestionStatus={ingestionStatus}

src/app/api/groups/[id]/preview/route.ts

@@ -0,0 +1,36 @@
+import { NextResponse } from "next/server";
+import { prisma } from "@/lib/prisma";
+import { authenticateApiRequest } from "@/lib/telegram/api-auth";
+
+export async function GET(
+  request: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  const authResult = await authenticateApiRequest(request);
+  if ("error" in authResult) return authResult.error;
+
+  const { id } = await params;
+
+  const group = await prisma.packageGroup.findUnique({
+    where: { id },
+    select: { previewData: true },
+  });
+
+  if (!group || !group.previewData) {
+    return new NextResponse(null, { status: 404 });
+  }
+
+  const buffer =
+    group.previewData instanceof Buffer
+      ? group.previewData
+      : Buffer.from(group.previewData);
+
+  return new NextResponse(buffer, {
+    status: 200,
+    headers: {
+      "Content-Type": "image/jpeg",
+      "Content-Length": String(buffer.length),
+      "Cache-Control": "public, max-age=3600, immutable",
+    },
+  });
+}

src/components/shared/data-table.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { type Table as TanStackTable, flexRender } from "@tanstack/react-table";
+import { type Table as TanStackTable, type Row, flexRender } from "@tanstack/react-table";
 import {
   Table,
   TableBody,
@@ -10,13 +10,15 @@ import {
   TableRow,
 } from "@/components/ui/table";
 import { EmptyState } from "./empty-state";
+import { cn } from "@/lib/utils";
 
 interface DataTableProps<TData> {
   table: TanStackTable<TData>;
   emptyMessage?: string;
+  rowClassName?: (row: Row<TData>) => string;
 }
 
-export function DataTable<TData>({ table, emptyMessage }: DataTableProps<TData>) {
+export function DataTable<TData>({ table, emptyMessage, rowClassName }: DataTableProps<TData>) {
   return (
     <div className="rounded-md border border-border">
       <Table>
@@ -36,7 +38,10 @@ export function DataTable<TData>({ table, emptyMessage }: DataTableProps<TData>)
         <TableBody>
           {table.getRowModel().rows?.length ? (
             table.getRowModel().rows.map((row) => (
-              <TableRow key={row.id} className="h-10 border-border hover:bg-muted/50">
+              <TableRow
+                key={row.id}
+                className={cn("h-10 border-border hover:bg-muted/50", rowClassName?.(row))}
+              >
                 {row.getVisibleCells().map((cell) => (
                   <TableCell key={cell.id} className="py-1.5 text-sm">
                     {flexRender(cell.column.columnDef.cell, cell.getContext())}

src/lib/telegram/queries.ts

@@ -5,6 +5,8 @@ import type {
   PackageFileItem,
   IngestionAccountStatus,
   SkippedPackageItem,
+  DisplayItem,
+  PackageGroupRow,
 } from "./types";
 
 export async function listPackages(options: {
@@ -73,6 +75,177 @@ export async function listPackages(options: {
   };
 }
 
+export async function listDisplayItems(options: {
+  page: number;
+  limit: number;
+  channelId?: string;
+  creator?: string;
+  tag?: string;
+  sortBy: "indexedAt" | "fileName" | "fileSize";
+  order: "asc" | "desc";
+}): Promise<{ items: DisplayItem[]; pagination: { page: number; limit: number; total: number; totalPages: number } }> {
+  const { page, limit, channelId, creator, tag, sortBy, order } = options;
+
+  // Build WHERE clause fragments for raw SQL
+  const conditions: string[] = [];
+  const params: unknown[] = [];
+  let paramIdx = 1;
+
+  if (channelId) {
+    conditions.push(`p."sourceChannelId" = $${paramIdx++}`);
+    params.push(channelId);
+  }
+  if (creator) {
+    conditions.push(`p."creator" = $${paramIdx++}`);
+    params.push(creator);
+  }
+  if (tag) {
+    conditions.push(`$${paramIdx++} = ANY(p."tags")`);
+    params.push(tag);
+  }
+
+  const whereClause = conditions.length > 0 ? `WHERE ${conditions.join(" AND ")}` : "";
+
+  const sortCol = sortBy === "fileName" ? `"fileName"` : sortBy === "fileSize" ? `"fileSize"` : `"indexedAt"`;
+  const sortDir = order === "asc" ? "ASC" : "DESC";
+
+  // Step 1: Count display items
+  const countResult = await prisma.$queryRawUnsafe<[{ count: bigint }]>(
+    `SELECT COUNT(*) AS count FROM (
+      SELECT DISTINCT COALESCE(p."packageGroupId", p."id") AS display_id
+      FROM packages p
+      ${whereClause}
+    ) AS display_items`,
+    ...params
+  );
+  const total = Number(countResult[0].count);
+
+  // Step 2: Get display item IDs for this page
+  const limitParam = paramIdx++;
+  const offsetParam = paramIdx++;
+  const displayRows = await prisma.$queryRawUnsafe<
+    { display_id: string; display_type: string }[]
+  >(
+    `SELECT
+      COALESCE(p."packageGroupId", p."id") AS display_id,
+      CASE WHEN p."packageGroupId" IS NOT NULL THEN 'group' ELSE 'package' END AS display_type,
+      MAX(p.${sortCol}) AS sort_value
+    FROM packages p
+    ${whereClause}
+    GROUP BY COALESCE(p."packageGroupId", p."id"),
+             CASE WHEN p."packageGroupId" IS NOT NULL THEN 'group' ELSE 'package' END
+    ORDER BY sort_value ${sortDir}
+    LIMIT $${limitParam} OFFSET $${offsetParam}`,
+    ...params, limit, (page - 1) * limit
+  );
+
+  // Step 3: Fetch full data
+  const groupIds = displayRows.filter((r) => r.display_type === "group").map((r) => r.display_id);
+  const packageIds = displayRows.filter((r) => r.display_type === "package").map((r) => r.display_id);
+
+  const standalonePackages = packageIds.length > 0
+    ? await prisma.package.findMany({
+        where: { id: { in: packageIds } },
+        select: {
+          id: true, fileName: true, fileSize: true, contentHash: true,
+          archiveType: true, fileCount: true, isMultipart: true,
+          indexedAt: true, creator: true, tags: true, previewData: true,
+          sourceChannel: { select: { id: true, title: true } },
+        },
+      })
+    : [];
+
+  const groups = groupIds.length > 0
+    ? await prisma.packageGroup.findMany({
+        where: { id: { in: groupIds } },
+        select: {
+          id: true, name: true, previewData: true,
+          sourceChannel: { select: { id: true, title: true } },
+          packages: {
+            select: {
+              id: true, fileName: true, fileSize: true, contentHash: true,
+              archiveType: true, fileCount: true, isMultipart: true,
+              indexedAt: true, creator: true, tags: true, previewData: true,
+              sourceChannel: { select: { id: true, title: true } },
+            },
+            orderBy: { indexedAt: "desc" },
+          },
+        },
+      })
+    : [];
+
+  // Build DisplayItem array in the original sort order
+  const packageMap = new Map(standalonePackages.map((p) => [p.id, p]));
+  const groupMap = new Map(groups.map((g) => [g.id, g]));
+
+  const items: DisplayItem[] = displayRows.map((row) => {
+    if (row.display_type === "package") {
+      const pkg = packageMap.get(row.display_id)!;
+      return {
+        type: "package" as const,
+        data: {
+          id: pkg.id,
+          fileName: pkg.fileName,
+          fileSize: pkg.fileSize.toString(),
+          contentHash: pkg.contentHash,
+          archiveType: pkg.archiveType,
+          fileCount: pkg.fileCount,
+          isMultipart: pkg.isMultipart,
+          hasPreview: pkg.previewData !== null,
+          creator: pkg.creator,
+          tags: pkg.tags,
+          indexedAt: pkg.indexedAt.toISOString(),
+          sourceChannel: pkg.sourceChannel,
+          matchedFileCount: 0,
+          matchedByContent: false,
+        },
+      };
+    } else {
+      const grp = groupMap.get(row.display_id)!;
+      const allTags = [...new Set(grp.packages.flatMap((p) => p.tags))];
+      const archiveTypes = [...new Set(grp.packages.map((p) => p.archiveType))] as PackageGroupRow["archiveTypes"];
+      return {
+        type: "group" as const,
+        data: {
+          id: grp.id,
+          name: grp.name,
+          hasPreview: grp.previewData !== null,
+          totalFileSize: grp.packages.reduce((sum, p) => sum + p.fileSize, BigInt(0)).toString(),
+          totalFileCount: grp.packages.reduce((sum, p) => sum + p.fileCount, 0),
+          packageCount: grp.packages.length,
+          combinedTags: allTags,
+          archiveTypes,
+          latestIndexedAt: grp.packages.length > 0
+            ? grp.packages[0].indexedAt.toISOString()
+            : new Date().toISOString(),
+          sourceChannel: grp.sourceChannel,
+          packages: grp.packages.map((pkg) => ({
+            id: pkg.id,
+            fileName: pkg.fileName,
+            fileSize: pkg.fileSize.toString(),
+            contentHash: pkg.contentHash,
+            archiveType: pkg.archiveType,
+            fileCount: pkg.fileCount,
+            isMultipart: pkg.isMultipart,
+            hasPreview: pkg.previewData !== null,
+            creator: pkg.creator,
+            tags: pkg.tags,
+            indexedAt: pkg.indexedAt.toISOString(),
+            sourceChannel: pkg.sourceChannel,
+            matchedFileCount: 0,
+            matchedByContent: false,
+          })),
+        },
+      };
+    }
+  });
+
+  return {
+    items,
+    pagination: { page, limit, total, totalPages: Math.ceil(total / limit) },
+  };
+}
+
 export async function getPackageById(
   id: string
 ): Promise<PackageDetail | null> {
@@ -203,7 +376,16 @@ export async function searchPackages(options: {
           ).map((p) => p.id)
         : [];
 
-    const allIds = [...new Set([...fileMatchedIds, ...packageNameIds])];
+    // Also match by group name
+    const groupNameMatches = await prisma.package.findMany({
+      where: {
+        packageGroup: { name: { contains: q, mode: "insensitive" } },
+      },
+      select: { id: true },
+    });
+    const groupMatchedIds = groupNameMatches.map((p) => p.id);
+
+    const allIds = [...new Set([...fileMatchedIds, ...packageNameIds, ...groupMatchedIds])];
 
     const [items, total] = await Promise.all([
       prisma.package.findMany({
@@ -388,3 +570,103 @@ export async function listSkippedPackages(options: {
 export async function countSkippedPackages(): Promise<number> {
   return prisma.skippedPackage.count();
 }
+
+export async function getPackageGroup(groupId: string) {
+  return prisma.packageGroup.findUnique({
+    where: { id: groupId },
+    select: {
+      id: true, name: true, previewData: true, mediaAlbumId: true,
+      sourceChannelId: true, createdAt: true,
+      sourceChannel: { select: { id: true, title: true } },
+      packages: {
+        select: {
+          id: true, fileName: true, fileSize: true, archiveType: true,
+          fileCount: true, creator: true, tags: true,
+        },
+        orderBy: { indexedAt: "desc" },
+      },
+    },
+  });
+}
+
+export async function updatePackageGroupName(groupId: string, name: string) {
+  return prisma.packageGroup.update({
+    where: { id: groupId },
+    data: { name: name.trim() },
+  });
+}
+
+export async function updatePackageGroupPreview(groupId: string, previewData: Buffer) {
+  return prisma.packageGroup.update({
+    where: { id: groupId },
+    data: { previewData: new Uint8Array(previewData) },
+  });
+}
+
+export async function createManualGroup(name: string, packageIds: string[]) {
+  // Verify all packages belong to the same channel
+  const pkgs = await prisma.package.findMany({
+    where: { id: { in: packageIds } },
+    select: { sourceChannelId: true },
+  });
+  if (pkgs.length === 0) {
+    throw new Error("No matching packages found");
+  }
+  const channelIds = new Set(pkgs.map((p) => p.sourceChannelId));
+  if (channelIds.size > 1) {
+    throw new Error("Cannot group packages from different channels");
+  }
+
+  const firstPkg = pkgs[0];
+  const group = await prisma.packageGroup.create({
+    data: {
+      name: name.trim(),
+      sourceChannelId: firstPkg.sourceChannelId,
+    },
+  });
+
+  await prisma.package.updateMany({
+    where: { id: { in: packageIds } },
+    data: { packageGroupId: group.id },
+  });
+
+  // Clean up empty groups left behind
+  await prisma.packageGroup.deleteMany({
+    where: { packages: { none: {} }, id: { not: group.id } },
+  });
+
+  return group;
+}
+
+export async function addPackagesToGroup(packageIds: string[], groupId: string) {
+  await prisma.package.updateMany({
+    where: { id: { in: packageIds } },
+    data: { packageGroupId: groupId },
+  });
+  await prisma.packageGroup.deleteMany({
+    where: { packages: { none: {} } },
+  });
+}
+
+export async function removePackageFromGroup(packageId: string) {
+  const pkg = await prisma.package.findUniqueOrThrow({
+    where: { id: packageId },
+    select: { packageGroupId: true },
+  });
+  if (!pkg.packageGroupId) return;
+  await prisma.package.update({
+    where: { id: packageId },
+    data: { packageGroupId: null },
+  });
+  await prisma.packageGroup.deleteMany({
+    where: { id: pkg.packageGroupId, packages: { none: {} } },
+  });
+}
+
+export async function dissolveGroup(groupId: string) {
+  await prisma.package.updateMany({
+    where: { packageGroupId: groupId },
+    data: { packageGroupId: null },
+  });
+  await prisma.packageGroup.delete({ where: { id: groupId } });
+}

src/lib/telegram/types.ts

@@ -68,6 +68,24 @@ export interface PaginatedResponse<T> {
   };
 }
 
+export interface PackageGroupRow {
+  id: string;
+  name: string;
+  hasPreview: boolean;
+  totalFileSize: string;
+  totalFileCount: number;
+  packageCount: number;
+  combinedTags: string[];
+  archiveTypes: ("ZIP" | "RAR" | "SEVEN_Z" | "DOCUMENT")[];
+  latestIndexedAt: string;
+  sourceChannel: { id: string; title: string };
+  packages: PackageListItem[];
+}
+
+export type DisplayItem =
+  | { type: "package"; data: PackageListItem }
+  | { type: "group"; data: PackageGroupRow };
+
 export interface IngestionAccountStatus {
   id: string;
   displayName: string | null;

worker/src/archive/multipart.ts

@@ -10,6 +10,7 @@ export interface TelegramMessage {
   fileId: string;
   fileSize: bigint;
   date: Date;
+  mediaAlbumId?: string;
 }
 
 export interface ArchiveSet {

worker/src/db/queries.ts

@@ -535,3 +535,53 @@ export async function deleteSkippedPackage(
     where: { sourceChannelId, sourceMessageId },
   });
 }
+
+export async function createOrFindPackageGroup(input: {
+  mediaAlbumId: string;
+  sourceChannelId: string;
+  name: string;
+  previewData?: Buffer | null;
+}): Promise<string> {
+  // findFirst + conditional create (Prisma doesn't support upsert on nullable compound unique)
+  const existing = await db.packageGroup.findFirst({
+    where: {
+      mediaAlbumId: input.mediaAlbumId,
+      sourceChannelId: input.sourceChannelId,
+    },
+    select: { id: true },
+  });
+
+  if (existing) return existing.id;
+
+  try {
+    const group = await db.packageGroup.create({
+      data: {
+        mediaAlbumId: input.mediaAlbumId,
+        sourceChannelId: input.sourceChannelId,
+        name: input.name,
+        previewData: input.previewData ? new Uint8Array(input.previewData) : undefined,
+      },
+    });
+    return group.id;
+  } catch (err) {
+    // Handle race condition: another process created the group between our findFirst and create
+    if (err instanceof Error && err.message.includes("Unique constraint")) {
+      const raced = await db.packageGroup.findFirst({
+        where: { mediaAlbumId: input.mediaAlbumId, sourceChannelId: input.sourceChannelId },
+        select: { id: true },
+      });
+      if (raced) return raced.id;
+    }
+    throw err;
+  }
+}
+
+export async function linkPackagesToGroup(
+  packageIds: string[],
+  groupId: string
+): Promise<void> {
+  await db.package.updateMany({
+    where: { id: { in: packageIds } },
+    data: { packageGroupId: groupId },
+  });
+}

worker/src/grouping.ts

@@ -0,0 +1,79 @@
+import type { Client } from "tdl";
+import type { TelegramPhoto } from "./preview/match.js";
+import { downloadPhotoThumbnail } from "./tdlib/download.js";
+import { createOrFindPackageGroup, linkPackagesToGroup } from "./db/queries.js";
+import { childLogger } from "./util/logger.js";
+import { db } from "./db/client.js";
+
+const log = childLogger("grouping");
+
+export interface IndexedPackageRef {
+  packageId: string;
+  sourceMessageId: bigint;
+  mediaAlbumId?: string;
+}
+
+/**
+ * After a scan cycle's packages are individually indexed, detect album groups
+ * and create PackageGroup records linking the members.
+ */
+export async function processAlbumGroups(
+  client: Client,
+  sourceChannelId: string,
+  indexedPackages: IndexedPackageRef[],
+  photos: TelegramPhoto[]
+): Promise<void> {
+  // Group indexed packages by mediaAlbumId
+  const albumMap = new Map<string, IndexedPackageRef[]>();
+  for (const pkg of indexedPackages) {
+    if (!pkg.mediaAlbumId || pkg.mediaAlbumId === "0") continue;
+    const group = albumMap.get(pkg.mediaAlbumId) ?? [];
+    group.push(pkg);
+    albumMap.set(pkg.mediaAlbumId, group);
+  }
+
+  if (albumMap.size === 0) return;
+
+  log.info({ albumCount: albumMap.size }, "Detected album groups to process");
+
+  for (const [albumId, members] of albumMap) {
+    if (members.length < 2) continue;
+
+    try {
+      // Find the first package's fileName for the group name fallback
+      const firstPkg = await db.package.findFirst({
+        where: { id: { in: members.map((m) => m.packageId) } },
+        orderBy: { sourceMessageId: "asc" },
+        select: { id: true, fileName: true },
+      });
+
+      // Try to find a caption from the album's photo message
+      const albumPhoto = photos.find((p) => p.mediaAlbumId === albumId);
+      const groupName = albumPhoto?.caption || firstPkg?.fileName || "Unnamed Group";
+
+      // Download preview from album photo if available
+      let previewData: Buffer | null = null;
+      if (albumPhoto) {
+        previewData = await downloadPhotoThumbnail(client, albumPhoto.fileId);
+      }
+
+      const groupId = await createOrFindPackageGroup({
+        mediaAlbumId: albumId,
+        sourceChannelId,
+        name: groupName,
+        previewData,
+      });
+
+      // Idempotent link — safe to re-run if some packages were indexed in prior scans
+      const packageIds = members.map((m) => m.packageId);
+      await linkPackagesToGroup(packageIds, groupId);
+
+      log.info(
+        { albumId, groupId, groupName, memberCount: packageIds.length },
+        "Linked packages to album group"
+      );
+    } catch (err) {
+      log.warn({ albumId, err }, "Failed to create album group — packages still indexed individually");
+    }
+  }
+}

worker/src/preview/match.ts

@@ -10,6 +10,7 @@ export interface TelegramPhoto {
   /** The smallest photo size available — used as thumbnail. */
   fileId: string;
   fileSize: number;
+  mediaAlbumId?: string;
 }
 
 export interface ArchiveRef {

worker/src/tdlib/download.ts

@@ -35,6 +35,7 @@ interface TdPhotoSize {
 interface TdMessage {
   id: number;
   date: number;
+  media_album_id?: string;
   content: {
     _: string;
     document?: {
@@ -211,6 +212,7 @@ export async function getChannelMessages(
             fileId: String(doc.document.id),
             fileSize: BigInt(doc.document.size),
             date: new Date(msg.date * 1000),
+            mediaAlbumId: msg.media_album_id && msg.media_album_id !== "0" ? msg.media_album_id : undefined,
           });
           continue;
         }
@@ -227,6 +229,7 @@ export async function getChannelMessages(
             caption,
             fileId: String(smallest.photo.id),
             fileSize: smallest.photo.size || smallest.photo.expected_size,
+            mediaAlbumId: msg.media_album_id && msg.media_album_id !== "0" ? msg.media_album_id : undefined,
           });
         }
       }

worker/src/tdlib/topics.ts

@@ -201,6 +201,7 @@ export async function getTopicMessages(
       messages?: {
         id: number;
         date: number;
+        media_album_id?: string;
         content: {
           _: string;
           document?: {
@@ -248,6 +249,7 @@ export async function getTopicMessages(
           fileId: String(doc.document.id),
           fileSize: BigInt(doc.document.size),
           date: new Date(msg.date * 1000),
+          mediaAlbumId: msg.media_album_id && msg.media_album_id !== "0" ? msg.media_album_id : undefined,
         });
         continue;
       }
@@ -263,6 +265,7 @@ export async function getTopicMessages(
           caption,
           fileId: String(smallest.photo.id),
           fileSize: smallest.photo.size || smallest.photo.expected_size,
+          mediaAlbumId: msg.media_album_id && msg.media_album_id !== "0" ? msg.media_album_id : undefined,
         });
       }
     }

worker/src/worker.ts

@@ -47,6 +47,7 @@ import { readRarContents } from "./archive/rar-reader.js";
 import { read7zContents } from "./archive/sevenz-reader.js";
 import { byteLevelSplit, concatenateFiles } from "./archive/split.js";
 import { uploadToChannel } from "./upload/channel.js";
+import { processAlbumGroups, type IndexedPackageRef } from "./grouping.js";
 import type { TelegramAccount, TelegramChannel } from "@prisma/client";
 import type { Client } from "tdl";
 
@@ -722,10 +723,11 @@ async function processArchiveSets(
 
   // Track the highest message ID that was successfully processed
   let maxProcessedId: bigint | null = null;
+  const indexedPackageRefs: IndexedPackageRef[] = [];
 
   for (let setIdx = 0; setIdx < archiveSets.length; setIdx++) {
     try {
-      await processOneArchiveSet(
+      const packageId = await processOneArchiveSet(
         ctx,
         archiveSets[setIdx],
         setIdx,
@@ -734,6 +736,15 @@ async function processArchiveSets(
         ingestionRunId
       );
 
+      if (packageId) {
+        const firstPart = archiveSets[setIdx].parts[0];
+        indexedPackageRefs.push({
+          packageId,
+          sourceMessageId: firstPart.id,
+          mediaAlbumId: firstPart.mediaAlbumId,
+        });
+      }
+
       // Set completed (ingested or confirmed duplicate) — advance watermark
       const setMaxId = archiveSets[setIdx].parts.reduce(
         (max, p) => (p.id > max ? p.id : max),
@@ -771,6 +782,16 @@ async function processArchiveSets(
     }
   }
 
+  // Post-processing: group packages by Telegram album ID
+  if (indexedPackageRefs.length > 0) {
+    await processAlbumGroups(
+      ctx.client,
+      channel.id,
+      indexedPackageRefs,
+      scanResult.photos
+    );
+  }
+
   return maxProcessedId;
 }
 
@@ -784,7 +805,7 @@ async function processOneArchiveSet(
   totalSets: number,
   previewMatches: Map<string, { id: bigint; fileId: string }>,
   ingestionRunId: string
-): Promise<void> {
+): Promise<string | null> {
   const {
     client, runId, channelTitle, channel,
     destChannelTelegramId, destChannelId,
@@ -814,7 +835,7 @@ async function processOneArchiveSet(
       totalFiles: totalSets,
       zipsDuplicate: counters.zipsDuplicate,
     });
-    return;
+    return null;
   }
 
   // ── Size guard: skip archives that exceed WORKER_MAX_ZIP_SIZE_MB ──
@@ -848,7 +869,7 @@ async function processOneArchiveSet(
       partCount: archiveSet.parts.length,
       accountId: ctx.accountId,
     });
-    return;
+    return null;
   }
 
   const tempPaths: string[] = [];
@@ -954,7 +975,7 @@ async function processOneArchiveSet(
         totalFiles: totalSets,
         zipsDuplicate: counters.zipsDuplicate,
       });
-      return;
+      return null;
     }
 
     // ── Reading metadata ──
@@ -1127,7 +1148,7 @@ async function processOneArchiveSet(
       tags.push(channel.category);
     }
 
-    await createPackageWithFiles({
+    const pkg = await createPackageWithFiles({
       contentHash,
       fileName: archiveName,
       fileSize: totalSize,
@@ -1166,6 +1187,8 @@ async function processOneArchiveSet(
       { fileName: archiveName, contentHash, fileCount: entries.length, creator },
       "Archive ingested"
     );
+
+    return pkg.id;
   } finally {
     // ALWAYS delete temp files and the set directory
     await deleteFiles([...tempPaths, ...splitPaths]);