feat: fix multi-part archive forwarding and add kickstarter package linking

Multi-part send fix:
- Add destMessageIds BigInt[] to Package schema with backfill migration
- Worker uploadToChannel now returns all message IDs, stored in DB
- Bot forwards all parts of multi-part archives (not just the first)
- Add retry logic for upload rate limits (429) and download stalls

Kickstarter package linking:
- Add package search/linking queries and API routes
- Add PackageLinkerDialog with search + checkbox selection
- Add "Link Packages" and "Send All" actions to kickstarter table
- Add sendAllKickstarterPackages server action

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

src/app/(app)/kickstarters/_components/kickstarter-columns.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { type ColumnDef } from "@tanstack/react-table";
-import { MoreHorizontal, Pencil, Trash2, ExternalLink } from "lucide-react";
+import { MoreHorizontal, Pencil, Trash2, ExternalLink, Link2, Send } from "lucide-react";
 import { DataTableColumnHeader } from "@/components/shared/data-table-column-header";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
@@ -32,6 +32,8 @@ export interface KickstarterRow {
 interface KickstarterColumnsProps {
   onEdit: (kickstarter: KickstarterRow) => void;
   onDelete: (id: string) => void;
+  onLinkPackages: (kickstarter: KickstarterRow) => void;
+  onSendAll: (kickstarter: KickstarterRow) => void;
 }
 
 const deliveryConfig: Record<string, { label: string; className: string }> = {
@@ -63,6 +65,8 @@ const paymentConfig: Record<string, { label: string; className: string }> = {
 export function getKickstarterColumns({
   onEdit,
   onDelete,
+  onLinkPackages,
+  onSendAll,
 }: KickstarterColumnsProps): ColumnDef<KickstarterRow, unknown>[] {
   return [
     {
@@ -170,6 +174,16 @@ export function getKickstarterColumns({
               <Pencil className="mr-2 h-3.5 w-3.5" />
               Edit
             </DropdownMenuItem>
+            <DropdownMenuItem onClick={() => onLinkPackages(row.original)}>
+              <Link2 className="mr-2 h-3.5 w-3.5" />
+              Link Packages
+            </DropdownMenuItem>
+            {row.original._count.packages > 0 && (
+              <DropdownMenuItem onClick={() => onSendAll(row.original)}>
+                <Send className="mr-2 h-3.5 w-3.5" />
+                Send All ({row.original._count.packages})
+              </DropdownMenuItem>
+            )}
             <DropdownMenuSeparator />
             <DropdownMenuItem
               onClick={() => onDelete(row.original.id)}

src/app/(app)/kickstarters/_components/kickstarter-table.tsx

@@ -7,7 +7,8 @@ import { toast } from "sonner";
 import { useDataTable } from "@/hooks/use-data-table";
 import { getKickstarterColumns, type KickstarterRow } from "./kickstarter-columns";
 import { KickstarterModal } from "./kickstarter-modal";
-import { deleteKickstarter } from "../actions";
+import { PackageLinkerDialog } from "./package-linker-dialog";
+import { deleteKickstarter, sendAllKickstarterPackages } from "../actions";
 import { DataTable } from "@/components/shared/data-table";
 import { DataTablePagination } from "@/components/shared/data-table-pagination";
 import { DataTableViewOptions } from "@/components/shared/data-table-view-options";
@@ -50,6 +51,7 @@ export function KickstarterTable({
   const [modalOpen, setModalOpen] = useState(false);
   const [editKickstarter, setEditKickstarter] = useState<KickstarterRow | undefined>();
   const [deleteId, setDeleteId] = useState<string | null>(null);
+  const [linkTarget, setLinkTarget] = useState<KickstarterRow | null>(null);
 
   const [searchValue, setSearchValue] = useState(searchParams.get("search") ?? "");
 
@@ -88,6 +90,17 @@ export function KickstarterTable({
       setModalOpen(true);
     },
     onDelete: (id) => setDeleteId(id),
+    onLinkPackages: (kickstarter) => setLinkTarget(kickstarter),
+    onSendAll: (kickstarter) => {
+      startTransition(async () => {
+        const result = await sendAllKickstarterPackages(kickstarter.id);
+        if (result.success) {
+          toast.success(`Queued ${result.data!.queued} package(s) for delivery`);
+        } else {
+          toast.error(result.error);
+        }
+      });
+    },
   });
 
   const { table } = useDataTable({ data, columns, pageCount });
@@ -188,6 +201,15 @@ export function KickstarterTable({
         onConfirm={handleDelete}
         isLoading={isPending}
       />
+
+      {linkTarget && (
+        <PackageLinkerDialog
+          open={!!linkTarget}
+          onOpenChange={(open) => !open && setLinkTarget(null)}
+          kickstarterId={linkTarget.id}
+          kickstarterName={linkTarget.name}
+        />
+      )}
     </div>
   );
 }

src/app/(app)/kickstarters/_components/package-linker-dialog.tsx

@@ -0,0 +1,211 @@
+"use client";
+
+import { useState, useTransition, useCallback, useEffect } from "react";
+import { Search, Package, X, Loader2 } from "lucide-react";
+import { toast } from "sonner";
+import { linkPackages } from "../actions";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Badge } from "@/components/ui/badge";
+import { Checkbox } from "@/components/ui/checkbox";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { ScrollArea } from "@/components/ui/scroll-area";
+
+interface PackageResult {
+  id: string;
+  fileName: string;
+  fileSize: string;
+  archiveType: string;
+  creator: string | null;
+  fileCount: number;
+}
+
+interface PackageLinkerDialogProps {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  kickstarterId: string;
+  kickstarterName: string;
+}
+
+function formatSize(bytes: string | number): string {
+  const b = Number(bytes);
+  if (b >= 1024 * 1024 * 1024) return `${(b / (1024 * 1024 * 1024)).toFixed(1)} GB`;
+  if (b >= 1024 * 1024) return `${(b / (1024 * 1024)).toFixed(0)} MB`;
+  return `${(b / 1024).toFixed(0)} KB`;
+}
+
+export function PackageLinkerDialog({
+  open,
+  onOpenChange,
+  kickstarterId,
+  kickstarterName,
+}: PackageLinkerDialogProps) {
+  const [isPending, startTransition] = useTransition();
+  const [searchQuery, setSearchQuery] = useState("");
+  const [searchResults, setSearchResults] = useState<PackageResult[]>([]);
+  const [isSearching, setIsSearching] = useState(false);
+  const [selectedIds, setSelectedIds] = useState<Set<string>>(new Set());
+
+  // Fetch currently linked packages when dialog opens
+  useEffect(() => {
+    if (open) {
+      setSearchQuery("");
+      setSearchResults([]);
+      fetch(`/api/packages/linked?kickstarterId=${kickstarterId}`)
+        .then((res) => res.json())
+        .then((data) => {
+          if (data.packageIds) {
+            setSelectedIds(new Set(data.packageIds));
+          }
+        })
+        .catch(() => {});
+    }
+  }, [open, kickstarterId]);
+
+  const doSearch = useCallback(async (query: string) => {
+    if (query.length < 2) {
+      setSearchResults([]);
+      return;
+    }
+    setIsSearching(true);
+    try {
+      const res = await fetch(`/api/packages/search?q=${encodeURIComponent(query)}&limit=20`);
+      if (res.ok) {
+        const data = await res.json();
+        setSearchResults(data.packages ?? []);
+      }
+    } catch {
+      // Ignore search errors
+    } finally {
+      setIsSearching(false);
+    }
+  }, []);
+
+  // Debounced search
+  useEffect(() => {
+    const timer = setTimeout(() => doSearch(searchQuery), 300);
+    return () => clearTimeout(timer);
+  }, [searchQuery, doSearch]);
+
+  function togglePackage(id: string) {
+    setSelectedIds((prev) => {
+      const next = new Set(prev);
+      if (next.has(id)) next.delete(id);
+      else next.add(id);
+      return next;
+    });
+  }
+
+  function handleSave() {
+    startTransition(async () => {
+      const result = await linkPackages(kickstarterId, Array.from(selectedIds));
+      if (result.success) {
+        toast.success(`Linked ${selectedIds.size} package(s) to "${kickstarterName}"`);
+        onOpenChange(false);
+      } else {
+        toast.error(result.error);
+      }
+    });
+  }
+
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent className="sm:max-w-lg">
+        <DialogHeader>
+          <DialogTitle>Link Packages</DialogTitle>
+          <DialogDescription>
+            Search and select STL packages to link to &ldquo;{kickstarterName}&rdquo;.
+          </DialogDescription>
+        </DialogHeader>
+
+        <div className="space-y-3">
+          {selectedIds.size > 0 && (
+            <div className="flex items-center gap-2 text-sm text-muted-foreground">
+              <Package className="h-4 w-4" />
+              {selectedIds.size} package(s) selected
+              <Button
+                variant="ghost"
+                size="sm"
+                className="h-6 px-2 text-xs"
+                onClick={() => setSelectedIds(new Set())}
+              >
+                Clear all
+              </Button>
+            </div>
+          )}
+
+          <div className="relative">
+            <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+            <Input
+              placeholder="Search packages by name or creator..."
+              value={searchQuery}
+              onChange={(e) => setSearchQuery(e.target.value)}
+              className="pl-9"
+              autoFocus
+            />
+            {isSearching && (
+              <Loader2 className="absolute right-2.5 top-2.5 h-4 w-4 animate-spin text-muted-foreground" />
+            )}
+          </div>
+
+          <ScrollArea className="h-[300px] rounded-md border">
+            <div className="p-2 space-y-1">
+              {searchResults.length === 0 && searchQuery.length >= 2 && !isSearching && (
+                <p className="text-sm text-muted-foreground text-center py-8">
+                  No packages found
+                </p>
+              )}
+              {searchQuery.length < 2 && (
+                <p className="text-sm text-muted-foreground text-center py-8">
+                  Type at least 2 characters to search
+                </p>
+              )}
+              {searchResults.map((pkg) => (
+                <label
+                  key={pkg.id}
+                  className="flex items-center gap-3 p-2 rounded-md hover:bg-muted/50 cursor-pointer"
+                >
+                  <Checkbox
+                    checked={selectedIds.has(pkg.id)}
+                    onCheckedChange={() => togglePackage(pkg.id)}
+                  />
+                  <div className="flex-1 min-w-0">
+                    <p className="text-sm font-medium truncate">{pkg.fileName}</p>
+                    <div className="flex items-center gap-2 text-xs text-muted-foreground">
+                      {pkg.creator && <span>{pkg.creator}</span>}
+                      <span>{formatSize(pkg.fileSize)}</span>
+                      <Badge variant="outline" className="text-[10px] h-4 px-1">
+                        {pkg.archiveType}
+                      </Badge>
+                      {pkg.fileCount > 0 && <span>{pkg.fileCount} files</span>}
+                    </div>
+                  </div>
+                  {selectedIds.has(pkg.id) && (
+                    <X className="h-3.5 w-3.5 text-muted-foreground shrink-0" />
+                  )}
+                </label>
+              ))}
+            </div>
+          </ScrollArea>
+        </div>
+
+        <DialogFooter>
+          <Button variant="outline" onClick={() => onOpenChange(false)}>
+            Cancel
+          </Button>
+          <Button onClick={handleSave} disabled={isPending}>
+            {isPending ? <Loader2 className="h-4 w-4 animate-spin mr-1" /> : null}
+            Save ({selectedIds.size})
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}