Init

src/app/(app)/dashboard/loading.tsx

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+import { Skeleton } from "@/components/ui/skeleton";
+import { Card, CardContent } from "@/components/ui/card";
+
+export default function DashboardLoading() {
+  return (
+    <div className="space-y-6">
+      <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-4">
+        {Array.from({ length: 4 }).map((_, i) => (
+          <Card key={i} className="border-border">
+            <CardContent className="p-4">
+              <div className="flex items-center justify-between">
+                <div className="space-y-2">
+                  <Skeleton className="h-3 w-20" />
+                  <Skeleton className="h-7 w-16" />
+                  <Skeleton className="h-3 w-24" />
+                </div>
+                <Skeleton className="h-10 w-10 rounded-md" />
+              </div>
+            </CardContent>
+          </Card>
+        ))}
+      </div>
+      <div className="grid gap-6 lg:grid-cols-2">
+        <Card className="border-border">
+          <CardContent className="p-6 space-y-4">
+            <Skeleton className="h-5 w-32" />
+            {Array.from({ length: 3 }).map((_, i) => (
+              <Skeleton key={i} className="h-10 w-full" />
+            ))}
+          </CardContent>
+        </Card>
+        <Card className="border-border">
+          <CardContent className="p-6 space-y-4">
+            <Skeleton className="h-5 w-32" />
+            {Array.from({ length: 3 }).map((_, i) => (
+              <Skeleton key={i} className="h-10 w-full" />
+            ))}
+          </CardContent>
+        </Card>
+      </div>
+    </div>
+  );
+}

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

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+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { getDashboardStats } from "@/data/dashboard.queries";
+import { getUserSettings } from "@/data/settings.queries";
+import { Package, DollarSign, AlertTriangle, Activity } from "lucide-react";
+import { StatCard } from "@/components/shared/stat-card";
+import { ColorSwatch } from "@/components/shared/color-swatch";
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import { Badge } from "@/components/ui/badge";
+
+export default async function DashboardPage() {
+  const session = await auth();
+  if (!session?.user?.id) redirect("/login");
+
+  const settings = await getUserSettings(session.user.id);
+  const stats = await getDashboardStats(session.user.id, settings.lowStockThreshold);
+
+  const currencyFormatter = new Intl.NumberFormat("en-US", {
+    style: "currency",
+    currency: settings.currency,
+  });
+
+  return (
+    <div className="space-y-6">
+      {/* Stats Grid */}
+      <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-4">
+        <StatCard
+          title="Total Items"
+          value={stats.totalItems}
+          icon={Package}
+          description="Filaments, resins & paints"
+        />
+        <StatCard
+          title="Inventory Value"
+          value={currencyFormatter.format(stats.inventoryValue)}
+          icon={DollarSign}
+          description="Total purchase cost"
+        />
+        <StatCard
+          title="Low Stock"
+          value={stats.lowStockCount}
+          icon={AlertTriangle}
+          description={`Below ${settings.lowStockThreshold}% remaining`}
+          iconClassName={stats.lowStockCount > 0 ? "text-orange-400" : undefined}
+        />
+        <StatCard
+          title="Recent Activity"
+          value={stats.recentActivityCount}
+          icon={Activity}
+          description="Usage logs in last 24h"
+        />
+      </div>
+
+      <div className="grid gap-6 lg:grid-cols-2">
+        {/* Low Stock Alerts */}
+        <Card className="border-border">
+          <CardHeader className="pb-3">
+            <CardTitle className="text-base">Low Stock Alerts</CardTitle>
+            <CardDescription>Items below {settings.lowStockThreshold}% remaining</CardDescription>
+          </CardHeader>
+          <CardContent>
+            {stats.lowStockItems.length === 0 ? (
+              <p className="text-sm text-muted-foreground">All items are well stocked.</p>
+            ) : (
+              <div className="space-y-3">
+                {stats.lowStockItems.map((item) => (
+                  <div key={`${item.type}-${item.id}`} className="flex items-center gap-3">
+                    <ColorSwatch hex={item.colorHex} size="sm" />
+                    <div className="flex-1 min-w-0">
+                      <p className="text-sm font-medium truncate">{item.name}</p>
+                      <p className="text-xs text-muted-foreground capitalize">{item.type}</p>
+                    </div>
+                    <div className="text-right">
+                      <p className="text-sm font-medium text-orange-400">
+                        {Math.round(item.remaining)}
+                        {item.type === "filament" ? "g" : "ml"}
+                      </p>
+                      <p className="text-xs text-muted-foreground">{Math.round(item.percent)}% left</p>
+                    </div>
+                  </div>
+                ))}
+              </div>
+            )}
+          </CardContent>
+        </Card>
+
+        {/* Recent Usage */}
+        <Card className="border-border">
+          <CardHeader className="pb-3">
+            <CardTitle className="text-base">Recent Usage</CardTitle>
+            <CardDescription>Latest consumption log entries</CardDescription>
+          </CardHeader>
+          <CardContent>
+            {stats.recentUsage.length === 0 ? (
+              <p className="text-sm text-muted-foreground">No usage logged yet.</p>
+            ) : (
+              <div className="space-y-3">
+                {stats.recentUsage.map((log) => (
+                  <div key={log.id} className="flex items-center gap-3">
+                    <Badge variant="outline" className="text-[10px] shrink-0">
+                      {log.itemType}
+                    </Badge>
+                    <div className="flex-1 min-w-0">
+                      <p className="text-sm font-medium truncate">{log.itemName}</p>
+                      <p className="text-xs text-muted-foreground">
+                        {log.notes || "No notes"}
+                      </p>
+                    </div>
+                    <div className="text-right shrink-0">
+                      <p className="text-sm font-medium">
+                        -{log.amount}{log.unit}
+                      </p>
+                      <p className="text-xs text-muted-foreground">
+                        {new Date(log.createdAt).toLocaleDateString()}
+                      </p>
+                    </div>
+                  </div>
+                ))}
+              </div>
+            )}
+          </CardContent>
+        </Card>
+      </div>
+    </div>
+  );
+}

src/app/(app)/filaments/_components/filament-columns.tsx

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+"use client";
+
+import { type ColumnDef } from "@tanstack/react-table";
+import { MoreHorizontal, Pencil, Archive, Trash2, Plus } from "lucide-react";
+import { DataTableColumnHeader } from "@/components/shared/data-table-column-header";
+import { StatusBadge, getStockStatus } from "@/components/shared/status-badge";
+import { ColorSwatch } from "@/components/shared/color-swatch";
+import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+
+export interface FilamentRow {
+  id: string;
+  name: string;
+  brand: string;
+  material: string;
+  color: string;
+  colorHex: string;
+  spoolWeight: number;
+  usedWeight: number;
+  cost: number | null;
+  purchaseDate: Date | null;
+  archived: boolean;
+  vendor: { id: string; name: string } | null;
+  location: { id: string; name: string } | null;
+  tags: { tag: { id: string; name: string } }[];
+}
+
+interface FilamentColumnsProps {
+  onEdit: (filament: FilamentRow) => void;
+  onArchive: (id: string) => void;
+  onDelete: (id: string) => void;
+  onLogUsage: (filament: FilamentRow) => void;
+  lowStockThreshold: number;
+}
+
+export function getFilamentColumns({
+  onEdit,
+  onArchive,
+  onDelete,
+  onLogUsage,
+  lowStockThreshold,
+}: FilamentColumnsProps): ColumnDef<FilamentRow, unknown>[] {
+  return [
+    {
+      id: "colorPreview",
+      header: "",
+      cell: ({ row }) => <ColorSwatch hex={row.original.colorHex} size="sm" />,
+      enableHiding: false,
+      enableSorting: false,
+      size: 40,
+    },
+    {
+      accessorKey: "name",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Name" />,
+      cell: ({ row }) => (
+        <div className="flex items-center gap-2">
+          <span className="font-medium">{row.original.name}</span>
+          {row.original.archived && <StatusBadge variant="archived" />}
+        </div>
+      ),
+      enableHiding: false,
+    },
+    {
+      accessorKey: "brand",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Brand" />,
+      cell: ({ row }) => <span className="text-sm">{row.original.brand}</span>,
+    },
+    {
+      accessorKey: "material",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Material" />,
+      cell: ({ row }) => (
+        <Badge variant="secondary" className="text-[10px]">
+          {row.original.material}
+        </Badge>
+      ),
+    },
+    {
+      id: "remaining",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Remaining" />,
+      cell: ({ row }) => {
+        const remaining = row.original.spoolWeight - row.original.usedWeight;
+        const percent = row.original.spoolWeight > 0
+          ? Math.round((remaining / row.original.spoolWeight) * 100)
+          : 0;
+        const status = getStockStatus(remaining, row.original.spoolWeight, lowStockThreshold, row.original.archived);
+
+        return (
+          <div className="flex items-center gap-2">
+            <div className="h-1.5 w-16 rounded-full bg-muted">
+              <div
+                className={`h-full rounded-full ${
+                  status === "lowStock" || status === "empty"
+                    ? "bg-orange-500"
+                    : "bg-emerald-500"
+                }`}
+                style={{ width: `${Math.max(0, Math.min(100, percent))}%` }}
+              />
+            </div>
+            <span className="text-sm text-muted-foreground">
+              {Math.round(remaining)}g ({percent}%)
+            </span>
+            {(status === "lowStock" || status === "empty") && !row.original.archived && (
+              <StatusBadge variant={status} />
+            )}
+          </div>
+        );
+      },
+      accessorFn: (row) => row.spoolWeight - row.usedWeight,
+    },
+    {
+      id: "location",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Location" />,
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {row.original.location?.name || "—"}
+        </span>
+      ),
+      accessorFn: (row) => row.location?.name,
+    },
+    {
+      id: "vendor",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Vendor" />,
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {row.original.vendor?.name || "—"}
+        </span>
+      ),
+      accessorFn: (row) => row.vendor?.name,
+    },
+    {
+      accessorKey: "cost",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Cost" />,
+      cell: ({ row }) => (
+        <span className="text-sm">
+          {row.original.cost != null ? `$${row.original.cost.toFixed(2)}` : "—"}
+        </span>
+      ),
+    },
+    {
+      accessorKey: "purchaseDate",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Purchased" />,
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {row.original.purchaseDate
+            ? new Date(row.original.purchaseDate).toLocaleDateString()
+            : "—"}
+        </span>
+      ),
+    },
+    {
+      id: "actions",
+      cell: ({ row }) => (
+        <DropdownMenu>
+          <DropdownMenuTrigger asChild>
+            <Button variant="ghost" size="icon" className="h-8 w-8">
+              <MoreHorizontal className="h-4 w-4" />
+            </Button>
+          </DropdownMenuTrigger>
+          <DropdownMenuContent align="end">
+            <DropdownMenuItem onClick={() => onEdit(row.original)}>
+              <Pencil className="mr-2 h-3.5 w-3.5" />
+              Edit
+            </DropdownMenuItem>
+            <DropdownMenuItem onClick={() => onLogUsage(row.original)}>
+              <Plus className="mr-2 h-3.5 w-3.5" />
+              Log Usage
+            </DropdownMenuItem>
+            <DropdownMenuItem onClick={() => onArchive(row.original.id)}>
+              <Archive className="mr-2 h-3.5 w-3.5" />
+              {row.original.archived ? "Unarchive" : "Archive"}
+            </DropdownMenuItem>
+            <DropdownMenuSeparator />
+            <DropdownMenuItem
+              onClick={() => onDelete(row.original.id)}
+              className="text-destructive focus:text-destructive"
+            >
+              <Trash2 className="mr-2 h-3.5 w-3.5" />
+              Delete
+            </DropdownMenuItem>
+          </DropdownMenuContent>
+        </DropdownMenu>
+      ),
+      enableHiding: false,
+    },
+  ];
+}

src/app/(app)/filaments/_components/filament-form.tsx

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+"use client";
+
+import { useTransition } from "react";
+import { useForm } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { toast } from "sonner";
+import { filamentSchema, type FilamentInput } from "@/schemas/filament.schema";
+import { MATERIALS } from "@/lib/constants";
+import { createFilament, updateFilament } from "../actions";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Textarea } from "@/components/ui/textarea";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import {
+  Form,
+  FormControl,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
+import { ColorSwatch } from "@/components/shared/color-swatch";
+import { CatalogBrowserButton } from "@/components/shared/catalog-browser-button";
+import { AutocompleteInput } from "@/components/shared/autocomplete-input";
+import type { CatalogItem } from "@/types/catalog.types";
+
+interface FilamentFormProps {
+  filament?: {
+    id: string;
+    name: string;
+    brand: string;
+    material: string;
+    color: string;
+    colorHex: string;
+    diameter: number;
+    spoolWeight: number;
+    usedWeight: number;
+    emptySpoolWeight: number;
+    cost: number | null;
+    purchaseDate: Date | null;
+    notes: string | null;
+    vendorId: string | null;
+    locationId: string | null;
+  };
+  vendors: { id: string; name: string }[];
+  locations: { id: string; name: string }[];
+  onSuccess: () => void;
+}
+
+export function FilamentForm({ filament, vendors, locations, onSuccess }: FilamentFormProps) {
+  const [isPending, startTransition] = useTransition();
+  const isEditing = !!filament;
+
+  const form = useForm<FilamentInput>({
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    resolver: zodResolver(filamentSchema) as any,
+    defaultValues: {
+      name: filament?.name ?? "",
+      brand: filament?.brand ?? "",
+      material: (filament?.material as FilamentInput["material"]) ?? "PLA",
+      color: filament?.color ?? "",
+      colorHex: filament?.colorHex ?? "#000000",
+      diameter: filament?.diameter ?? 1.75,
+      spoolWeight: filament?.spoolWeight ?? 1000,
+      usedWeight: filament?.usedWeight ?? 0,
+      emptySpoolWeight: filament?.emptySpoolWeight ?? 0,
+      cost: filament?.cost ?? undefined,
+      purchaseDate: filament?.purchaseDate
+        ? new Date(filament.purchaseDate).toISOString().split("T")[0]
+        : "",
+      notes: filament?.notes ?? "",
+      vendorId: filament?.vendorId ?? "",
+      locationId: filament?.locationId ?? "",
+    },
+  });
+
+  const watchColorHex = form.watch("colorHex");
+
+  function handleCatalogSelect(item: CatalogItem) {
+    form.setValue("name", item.name);
+    form.setValue("brand", item.brand);
+    if (item.color) form.setValue("color", item.color);
+    if (item.colorHex) form.setValue("colorHex", item.colorHex);
+    if (item.material) {
+      const match = MATERIALS.find(
+        (m) => m.toUpperCase() === item.material!.toUpperCase(),
+      );
+      if (match) form.setValue("material", match);
+    }
+    if (item.weight) form.setValue("spoolWeight", item.weight);
+    if (item.price != null) form.setValue("cost", item.price);
+  }
+
+  function onSubmit(values: FilamentInput) {
+    startTransition(async () => {
+      const result = isEditing
+        ? await updateFilament(filament!.id, values)
+        : await createFilament(values);
+
+      if (!result.success) {
+        toast.error(result.error);
+        return;
+      }
+
+      toast.success(isEditing ? "Filament updated" : "Filament created");
+      form.reset();
+      onSuccess();
+    });
+  }
+
+  return (
+    <Form {...form}>
+      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
+        {!isEditing && (
+          <div className="flex items-center justify-between">
+            <p className="text-sm text-muted-foreground">
+              Auto-fill from product catalog
+            </p>
+            <CatalogBrowserButton type="filament" onSelect={handleCatalogSelect} />
+          </div>
+        )}
+
+        <div className="grid grid-cols-2 gap-4">
+          <FormField
+            control={form.control}
+            name="name"
+            render={({ field }) => (
+              <FormItem className="col-span-2">
+                <FormLabel>Name</FormLabel>
+                <FormControl>
+                  {!isEditing ? (
+                    <AutocompleteInput
+                      type="filament"
+                      value={field.value}
+                      onChange={field.onChange}
+                      onSelectItem={handleCatalogSelect}
+                      placeholder="Filament name — type to search catalog"
+                    />
+                  ) : (
+                    <Input placeholder="Filament name" {...field} />
+                  )}
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="brand"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Brand</FormLabel>
+                <FormControl>
+                  <Input placeholder="Brand name" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="material"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Material</FormLabel>
+                <Select onValueChange={field.onChange} value={field.value}>
+                  <FormControl>
+                    <SelectTrigger>
+                      <SelectValue placeholder="Select material" />
+                    </SelectTrigger>
+                  </FormControl>
+                  <SelectContent>
+                    {MATERIALS.map((m) => (
+                      <SelectItem key={m} value={m}>{m}</SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="color"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Color Name</FormLabel>
+                <FormControl>
+                  <Input placeholder="e.g. Galaxy Black" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="colorHex"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Color Hex</FormLabel>
+                <div className="flex items-center gap-2">
+                  <FormControl>
+                    <Input placeholder="#000000" {...field} className="flex-1" />
+                  </FormControl>
+                  <input
+                    type="color"
+                    value={field.value}
+                    onChange={(e) => field.onChange(e.target.value)}
+                    className="h-9 w-9 cursor-pointer rounded border border-border bg-transparent p-0.5"
+                  />
+                  <ColorSwatch hex={watchColorHex || "#000000"} size="md" />
+                </div>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="spoolWeight"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Spool Weight (g)</FormLabel>
+                <FormControl>
+                  <Input type="number" step="1" min="0" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="usedWeight"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Used Weight (g)</FormLabel>
+                <FormControl>
+                  <Input type="number" step="0.1" min="0" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="vendorId"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Vendor</FormLabel>
+                <Select
+                  onValueChange={(val) => field.onChange(val === "none" ? "" : val)}
+                  value={field.value || "none"}
+                >
+                  <FormControl>
+                    <SelectTrigger>
+                      <SelectValue placeholder="Select vendor" />
+                    </SelectTrigger>
+                  </FormControl>
+                  <SelectContent>
+                    <SelectItem value="none">None</SelectItem>
+                    {vendors.map((v) => (
+                      <SelectItem key={v.id} value={v.id}>{v.name}</SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="locationId"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Location</FormLabel>
+                <Select
+                  onValueChange={(val) => field.onChange(val === "none" ? "" : val)}
+                  value={field.value || "none"}
+                >
+                  <FormControl>
+                    <SelectTrigger>
+                      <SelectValue placeholder="Select location" />
+                    </SelectTrigger>
+                  </FormControl>
+                  <SelectContent>
+                    <SelectItem value="none">None</SelectItem>
+                    {locations.map((l) => (
+                      <SelectItem key={l.id} value={l.id}>{l.name}</SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="cost"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Cost</FormLabel>
+                <FormControl>
+                  <Input type="number" step="0.01" min="0" placeholder="0.00" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="purchaseDate"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Purchase Date</FormLabel>
+                <FormControl>
+                  <Input type="date" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="notes"
+            render={({ field }) => (
+              <FormItem className="col-span-2">
+                <FormLabel>Notes</FormLabel>
+                <FormControl>
+                  <Textarea placeholder="Optional notes" rows={2} {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+        </div>
+
+        <div className="flex justify-end gap-2">
+          <Button type="submit" disabled={isPending}>
+            {isPending ? "Saving..." : isEditing ? "Update" : "Create"}
+          </Button>
+        </div>
+      </form>
+    </Form>
+  );
+}

src/app/(app)/filaments/_components/filament-modal.tsx

@@ -0,0 +1,48 @@
+"use client";
+
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { ScrollArea } from "@/components/ui/scroll-area";
+import { FilamentForm } from "./filament-form";
+
+interface FilamentModalProps {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  filament?: Parameters<typeof FilamentForm>[0]["filament"];
+  vendors: { id: string; name: string }[];
+  locations: { id: string; name: string }[];
+}
+
+export function FilamentModal({
+  open,
+  onOpenChange,
+  filament,
+  vendors,
+  locations,
+}: FilamentModalProps) {
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent className="sm:max-w-2xl max-h-[90vh]">
+        <DialogHeader>
+          <DialogTitle>{filament ? "Edit Filament" : "Add Filament"}</DialogTitle>
+          <DialogDescription>
+            {filament ? "Update the filament details below." : "Add a new filament spool to your inventory."}
+          </DialogDescription>
+        </DialogHeader>
+        <ScrollArea className="max-h-[70vh] pr-4">
+          <FilamentForm
+            filament={filament}
+            vendors={vendors}
+            locations={locations}
+            onSuccess={() => onOpenChange(false)}
+          />
+        </ScrollArea>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/app/(app)/filaments/_components/filament-table.tsx

@@ -0,0 +1,216 @@
+"use client";
+
+import { useState, useTransition, useCallback } from "react";
+import { useRouter, usePathname, useSearchParams } from "next/navigation";
+import { Plus, Search } from "lucide-react";
+import { toast } from "sonner";
+import { useDataTable } from "@/hooks/use-data-table";
+import { MATERIALS } from "@/lib/constants";
+import { getFilamentColumns, type FilamentRow } from "./filament-columns";
+import { FilamentModal } from "./filament-modal";
+import { deleteFilament, archiveFilament, logFilamentUsage } 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";
+import { DataTableFacetedFilter } from "@/components/shared/data-table-faceted-filter";
+import { DeleteDialog } from "@/components/shared/delete-dialog";
+import { UsageLogDialog } from "@/components/shared/usage-log-dialog";
+import { PageHeader } from "@/components/shared/page-header";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+
+interface FilamentTableProps {
+  data: FilamentRow[];
+  pageCount: number;
+  totalCount: number;
+  vendors: { id: string; name: string }[];
+  locations: { id: string; name: string }[];
+  lowStockThreshold: number;
+}
+
+export function FilamentTable({
+  data,
+  pageCount,
+  totalCount,
+  vendors,
+  locations,
+  lowStockThreshold,
+}: FilamentTableProps) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const searchParams = useSearchParams();
+  const [isPending, startTransition] = useTransition();
+
+  const [modalOpen, setModalOpen] = useState(false);
+  const [editFilament, setEditFilament] = useState<FilamentRow | undefined>();
+  const [deleteId, setDeleteId] = useState<string | null>(null);
+  const [usageFilament, setUsageFilament] = useState<FilamentRow | null>(null);
+  const [searchValue, setSearchValue] = useState(searchParams.get("search") ?? "");
+
+  // Filter state from URL
+  const materialFilter = new Set(searchParams.getAll("material"));
+  const vendorFilter = new Set(searchParams.getAll("vendor"));
+  const locationFilter = new Set(searchParams.getAll("location"));
+
+  const updateFilters = useCallback(
+    (key: string, values: Set<string>) => {
+      const params = new URLSearchParams(searchParams.toString());
+      params.delete(key);
+      values.forEach((v) => params.append(key, v));
+      params.set("page", "1");
+      router.push(`${pathname}?${params.toString()}`, { scroll: false });
+    },
+    [router, pathname, searchParams]
+  );
+
+  const updateSearch = (value: string) => {
+    setSearchValue(value);
+    const params = new URLSearchParams(searchParams.toString());
+    if (value) {
+      params.set("search", value);
+      params.set("page", "1");
+    } else {
+      params.delete("search");
+    }
+    router.push(`${pathname}?${params.toString()}`, { scroll: false });
+  };
+
+  const columns = getFilamentColumns({
+    onEdit: (filament) => {
+      setEditFilament(filament);
+      setModalOpen(true);
+    },
+    onArchive: (id) => {
+      startTransition(async () => {
+        const result = await archiveFilament(id);
+        if (result.success) toast.success("Filament updated");
+        else toast.error(result.error);
+      });
+    },
+    onDelete: (id) => setDeleteId(id),
+    onLogUsage: (filament) => setUsageFilament(filament),
+    lowStockThreshold,
+  });
+
+  const { table } = useDataTable({ data, columns, pageCount });
+
+  const handleDelete = () => {
+    if (!deleteId) return;
+    startTransition(async () => {
+      const result = await deleteFilament(deleteId);
+      if (result.success) {
+        toast.success("Filament deleted");
+        setDeleteId(null);
+      } else {
+        toast.error(result.error);
+      }
+    });
+  };
+
+  const materialOptions = MATERIALS.map((m) => ({ label: m, value: m }));
+  const vendorOptions = vendors.map((v) => ({ label: v.name, value: v.id }));
+  const locationOptions = locations.map((l) => ({ label: l.name, value: l.id }));
+
+  return (
+    <div className="space-y-4">
+      <PageHeader title="Filaments" description="Manage your 3D printing filament inventory">
+        <Button
+          onClick={() => {
+            setEditFilament(undefined);
+            setModalOpen(true);
+          }}
+        >
+          <Plus className="mr-2 h-4 w-4" />
+          Add Filament
+        </Button>
+      </PageHeader>
+
+      <div className="flex flex-wrap items-center gap-2">
+        <div className="relative flex-1 min-w-[200px] max-w-sm">
+          <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+          <Input
+            placeholder="Search filaments..."
+            value={searchValue}
+            onChange={(e) => updateSearch(e.target.value)}
+            className="pl-9 h-9"
+          />
+        </div>
+        <DataTableFacetedFilter
+          title="Material"
+          options={materialOptions}
+          selectedValues={materialFilter}
+          onSelectionChange={(values) => updateFilters("material", values)}
+        />
+        <DataTableFacetedFilter
+          title="Vendor"
+          options={vendorOptions}
+          selectedValues={vendorFilter}
+          onSelectionChange={(values) => updateFilters("vendor", values)}
+        />
+        <DataTableFacetedFilter
+          title="Location"
+          options={locationOptions}
+          selectedValues={locationFilter}
+          onSelectionChange={(values) => updateFilters("location", values)}
+        />
+        <DataTableViewOptions table={table} />
+      </div>
+
+      <DataTable table={table} emptyMessage="No filaments found. Add your first spool!" />
+      <DataTablePagination table={table} totalCount={totalCount} />
+
+      <FilamentModal
+        open={modalOpen}
+        onOpenChange={(open) => {
+          setModalOpen(open);
+          if (!open) setEditFilament(undefined);
+        }}
+        filament={
+          editFilament
+            ? {
+                id: editFilament.id,
+                name: editFilament.name,
+                brand: editFilament.brand,
+                material: editFilament.material,
+                color: editFilament.color,
+                colorHex: editFilament.colorHex,
+                diameter: 1.75,
+                spoolWeight: editFilament.spoolWeight,
+                usedWeight: editFilament.usedWeight,
+                emptySpoolWeight: 0,
+                cost: editFilament.cost,
+                purchaseDate: editFilament.purchaseDate,
+                notes: null,
+                vendorId: editFilament.vendor?.id ?? null,
+                locationId: editFilament.location?.id ?? null,
+              }
+            : undefined
+        }
+        vendors={vendors}
+        locations={locations}
+      />
+
+      <DeleteDialog
+        open={!!deleteId}
+        onOpenChange={(open) => !open && setDeleteId(null)}
+        title="Delete Filament"
+        description="This will permanently delete this filament spool and all its usage logs."
+        onConfirm={handleDelete}
+        isLoading={isPending}
+      />
+
+      {usageFilament && (
+        <UsageLogDialog
+          open={!!usageFilament}
+          onOpenChange={(open) => !open && setUsageFilament(null)}
+          itemName={usageFilament.name}
+          unit="g"
+          onSubmit={async (amount, notes) => {
+            const result = await logFilamentUsage(usageFilament.id, { amount, notes });
+            return result;
+          }}
+        />
+      )}
+    </div>
+  );
+}

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

@@ -0,0 +1,168 @@
+"use server";
+
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { filamentSchema } from "@/schemas/filament.schema";
+import { usageLogSchema } from "@/schemas/usage-log.schema";
+import { revalidatePath } from "next/cache";
+import type { ActionResult } from "@/types/api.types";
+
+export async function createFilament(input: unknown): Promise<ActionResult<{ id: string }>> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = filamentSchema.safeParse(input);
+  if (!parsed.success) {
+    return { success: false, error: "Validation failed" };
+  }
+
+  try {
+    const filament = await prisma.filament.create({
+      data: {
+        name: parsed.data.name,
+        brand: parsed.data.brand,
+        material: parsed.data.material,
+        color: parsed.data.color,
+        colorHex: parsed.data.colorHex,
+        diameter: parsed.data.diameter,
+        spoolWeight: parsed.data.spoolWeight,
+        usedWeight: parsed.data.usedWeight,
+        emptySpoolWeight: parsed.data.emptySpoolWeight,
+        purchaseDate: parsed.data.purchaseDate ? new Date(parsed.data.purchaseDate) : null,
+        cost: parsed.data.cost ?? null,
+        notes: parsed.data.notes || null,
+        vendorId: parsed.data.vendorId || null,
+        locationId: parsed.data.locationId || null,
+        userId: session.user.id,
+      },
+    });
+
+    revalidatePath("/filaments");
+    revalidatePath("/dashboard");
+    return { success: true, data: { id: filament.id } };
+  } catch {
+    return { success: false, error: "Failed to create filament" };
+  }
+}
+
+export async function updateFilament(id: string, input: unknown): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = filamentSchema.safeParse(input);
+  if (!parsed.success) {
+    return { success: false, error: "Validation failed" };
+  }
+
+  const existing = await prisma.filament.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.filament.update({
+      where: { id },
+      data: {
+        name: parsed.data.name,
+        brand: parsed.data.brand,
+        material: parsed.data.material,
+        color: parsed.data.color,
+        colorHex: parsed.data.colorHex,
+        diameter: parsed.data.diameter,
+        spoolWeight: parsed.data.spoolWeight,
+        usedWeight: parsed.data.usedWeight,
+        emptySpoolWeight: parsed.data.emptySpoolWeight,
+        purchaseDate: parsed.data.purchaseDate ? new Date(parsed.data.purchaseDate) : null,
+        cost: parsed.data.cost ?? null,
+        notes: parsed.data.notes || null,
+        vendorId: parsed.data.vendorId || null,
+        locationId: parsed.data.locationId || null,
+      },
+    });
+
+    revalidatePath("/filaments");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to update filament" };
+  }
+}
+
+export async function deleteFilament(id: string): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const existing = await prisma.filament.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.filament.delete({ where: { id } });
+    revalidatePath("/filaments");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to delete filament" };
+  }
+}
+
+export async function archiveFilament(id: string): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const existing = await prisma.filament.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.filament.update({
+      where: { id },
+      data: { archived: !existing.archived },
+    });
+    revalidatePath("/filaments");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to archive filament" };
+  }
+}
+
+export async function logFilamentUsage(
+  filamentId: string,
+  input: unknown
+): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = usageLogSchema.safeParse(input);
+  if (!parsed.success) {
+    return { success: false, error: "Validation failed" };
+  }
+
+  const existing = await prisma.filament.findFirst({
+    where: { id: filamentId, userId: session.user.id },
+  });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.$transaction([
+      prisma.usageLog.create({
+        data: {
+          itemType: "FILAMENT",
+          itemId: filamentId,
+          filamentId,
+          amount: parsed.data.amount,
+          unit: "g",
+          notes: parsed.data.notes || null,
+          userId: session.user.id,
+        },
+      }),
+      prisma.filament.update({
+        where: { id: filamentId },
+        data: { usedWeight: { increment: parsed.data.amount } },
+      }),
+    ]);
+
+    revalidatePath("/filaments");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to log usage" };
+  }
+}

src/app/(app)/filaments/loading.tsx

@@ -0,0 +1,24 @@
+import { Skeleton } from "@/components/ui/skeleton";
+
+export default function FilamentsLoading() {
+  return (
+    <div className="space-y-4">
+      <div className="flex items-center justify-between">
+        <Skeleton className="h-8 w-40" />
+        <Skeleton className="h-9 w-32" />
+      </div>
+      <div className="flex items-center gap-2">
+        <Skeleton className="h-9 w-64" />
+        <Skeleton className="h-8 w-24" />
+        <Skeleton className="h-8 w-24" />
+        <Skeleton className="h-8 w-24" />
+      </div>
+      <Skeleton className="h-10 w-full" />
+      <div className="space-y-2">
+        {Array.from({ length: 8 }).map((_, i) => (
+          <Skeleton key={i} className="h-10 w-full" />
+        ))}
+      </div>
+    </div>
+  );
+}

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

@@ -0,0 +1,36 @@
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { getFilaments } from "@/data/filament.queries";
+import { getVendorOptions } from "@/data/vendor.queries";
+import { getLocationOptions } from "@/data/location.queries";
+import { getUserSettings } from "@/data/settings.queries";
+import type { DataTableSearchParams } from "@/types/table.types";
+import { FilamentTable } from "./_components/filament-table";
+
+interface Props {
+  searchParams: Promise<DataTableSearchParams>;
+}
+
+export default async function FilamentsPage({ searchParams }: Props) {
+  const session = await auth();
+  if (!session?.user?.id) redirect("/login");
+
+  const params = await searchParams;
+  const [result, vendors, locations, settings] = await Promise.all([
+    getFilaments(session.user.id, params),
+    getVendorOptions(session.user.id),
+    getLocationOptions(session.user.id),
+    getUserSettings(session.user.id),
+  ]);
+
+  return (
+    <FilamentTable
+      data={JSON.parse(JSON.stringify(result.data))}
+      pageCount={result.pageCount}
+      totalCount={result.totalCount}
+      vendors={vendors}
+      locations={locations}
+      lowStockThreshold={settings.lowStockThreshold}
+    />
+  );
+}

src/app/(app)/layout.tsx

@@ -0,0 +1,16 @@
+import { Sidebar } from "@/components/layout/sidebar";
+import { Header } from "@/components/layout/header";
+
+export default function AppLayout({ children }: { children: React.ReactNode }) {
+  return (
+    <div className="flex h-screen overflow-hidden">
+      <div className="hidden lg:block">
+        <Sidebar />
+      </div>
+      <div className="flex flex-1 flex-col overflow-hidden">
+        <Header />
+        <main className="flex-1 overflow-y-auto p-4 lg:p-6">{children}</main>
+      </div>
+    </div>
+  );
+}

src/app/(app)/locations/_components/location-columns.tsx

@@ -0,0 +1,109 @@
+"use client";
+
+import { type ColumnDef } from "@tanstack/react-table";
+import { MoreHorizontal, Pencil, Archive, Trash2 } from "lucide-react";
+import { DataTableColumnHeader } from "@/components/shared/data-table-column-header";
+import { StatusBadge } from "@/components/shared/status-badge";
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+
+export interface LocationRow {
+  id: string;
+  name: string;
+  description: string | null;
+  archived: boolean;
+  createdAt: Date;
+  _count: { filaments: number; resins: number; paints: number };
+}
+
+interface LocationColumnsProps {
+  onEdit: (location: LocationRow) => void;
+  onArchive: (id: string) => void;
+  onDelete: (id: string) => void;
+}
+
+export function getLocationColumns({
+  onEdit,
+  onArchive,
+  onDelete,
+}: LocationColumnsProps): ColumnDef<LocationRow, unknown>[] {
+  return [
+    {
+      accessorKey: "name",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Name" />,
+      cell: ({ row }) => (
+        <div className="flex items-center gap-2">
+          <span className="font-medium">{row.original.name}</span>
+          {row.original.archived && <StatusBadge variant="archived" />}
+        </div>
+      ),
+      enableHiding: false,
+    },
+    {
+      accessorKey: "description",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Description" />,
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground truncate max-w-[300px] block">
+          {row.original.description || "\u2014"}
+        </span>
+      ),
+    },
+    {
+      id: "items",
+      header: "Items",
+      cell: ({ row }) => {
+        const c = row.original._count;
+        const total = c.filaments + c.resins + c.paints;
+        return (
+          <span className="text-sm text-muted-foreground">{total}</span>
+        );
+      },
+    },
+    {
+      accessorKey: "createdAt",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Created" />,
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {new Date(row.original.createdAt).toLocaleDateString()}
+        </span>
+      ),
+    },
+    {
+      id: "actions",
+      cell: ({ row }) => (
+        <DropdownMenu>
+          <DropdownMenuTrigger asChild>
+            <Button variant="ghost" size="icon" className="h-8 w-8">
+              <MoreHorizontal className="h-4 w-4" />
+            </Button>
+          </DropdownMenuTrigger>
+          <DropdownMenuContent align="end">
+            <DropdownMenuItem onClick={() => onEdit(row.original)}>
+              <Pencil className="mr-2 h-3.5 w-3.5" />
+              Edit
+            </DropdownMenuItem>
+            <DropdownMenuItem onClick={() => onArchive(row.original.id)}>
+              <Archive className="mr-2 h-3.5 w-3.5" />
+              {row.original.archived ? "Unarchive" : "Archive"}
+            </DropdownMenuItem>
+            <DropdownMenuSeparator />
+            <DropdownMenuItem
+              onClick={() => onDelete(row.original.id)}
+              className="text-destructive focus:text-destructive"
+            >
+              <Trash2 className="mr-2 h-3.5 w-3.5" />
+              Delete
+            </DropdownMenuItem>
+          </DropdownMenuContent>
+        </DropdownMenu>
+      ),
+      enableHiding: false,
+    },
+  ];
+}

src/app/(app)/locations/_components/location-form.tsx

@@ -0,0 +1,94 @@
+"use client";
+
+import { useTransition } from "react";
+import { useForm } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { toast } from "sonner";
+import { locationSchema, type LocationInput } from "@/schemas/location.schema";
+import { createLocation, updateLocation } from "../actions";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Textarea } from "@/components/ui/textarea";
+import {
+  Form,
+  FormControl,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
+
+interface LocationFormProps {
+  location?: { id: string; name: string; description: string | null };
+  onSuccess: () => void;
+}
+
+export function LocationForm({ location, onSuccess }: LocationFormProps) {
+  const [isPending, startTransition] = useTransition();
+  const isEditing = !!location;
+
+  const form = useForm<LocationInput>({
+    resolver: zodResolver(locationSchema),
+    defaultValues: {
+      name: location?.name ?? "",
+      description: location?.description ?? "",
+    },
+  });
+
+  function onSubmit(values: LocationInput) {
+    startTransition(async () => {
+      const result = isEditing
+        ? await updateLocation(location!.id, values)
+        : await createLocation(values);
+
+      if (!result.success) {
+        toast.error(result.error);
+        return;
+      }
+
+      toast.success(isEditing ? "Location updated" : "Location created");
+      form.reset();
+      onSuccess();
+    });
+  }
+
+  return (
+    <Form {...form}>
+      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
+        <FormField
+          control={form.control}
+          name="name"
+          render={({ field }) => (
+            <FormItem>
+              <FormLabel>Name</FormLabel>
+              <FormControl>
+                <Input placeholder="Location name" {...field} />
+              </FormControl>
+              <FormMessage />
+            </FormItem>
+          )}
+        />
+
+        <FormField
+          control={form.control}
+          name="description"
+          render={({ field }) => (
+            <FormItem>
+              <FormLabel>Description</FormLabel>
+              <FormControl>
+                <Textarea placeholder="Optional description" rows={3} {...field} />
+              </FormControl>
+              <FormMessage />
+            </FormItem>
+          )}
+        />
+
+        <div className="flex justify-end gap-2">
+          <Button type="submit" disabled={isPending}>
+            {isPending ? "Saving..." : isEditing ? "Update" : "Create"}
+          </Button>
+        </div>
+      </form>
+    </Form>
+  );
+}

src/app/(app)/locations/_components/location-modal.tsx

@@ -0,0 +1,34 @@
+"use client";
+
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { LocationForm } from "./location-form";
+
+interface LocationModalProps {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  location?: { id: string; name: string; description: string | null };
+}
+
+export function LocationModal({ open, onOpenChange, location }: LocationModalProps) {
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent className="sm:max-w-md">
+        <DialogHeader>
+          <DialogTitle>{location ? "Edit Location" : "Add Location"}</DialogTitle>
+          <DialogDescription>
+            {location
+              ? "Update the location details below."
+              : "Add a new storage location."}
+          </DialogDescription>
+        </DialogHeader>
+        <LocationForm location={location} onSuccess={() => onOpenChange(false)} />
+      </DialogContent>
+    </Dialog>
+  );
+}

src/app/(app)/locations/_components/location-table.tsx

@@ -0,0 +1,127 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { useRouter, usePathname, useSearchParams } from "next/navigation";
+import { Plus, Search } from "lucide-react";
+import { toast } from "sonner";
+import { useDataTable } from "@/hooks/use-data-table";
+import { getLocationColumns, type LocationRow } from "./location-columns";
+import { LocationModal } from "./location-modal";
+import { deleteLocation, archiveLocation } 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";
+import { DeleteDialog } from "@/components/shared/delete-dialog";
+import { PageHeader } from "@/components/shared/page-header";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+
+interface LocationTableProps {
+  data: LocationRow[];
+  pageCount: number;
+  totalCount: number;
+}
+
+export function LocationTable({ data, pageCount, totalCount }: LocationTableProps) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const searchParams = useSearchParams();
+  const [isPending, startTransition] = useTransition();
+
+  const [modalOpen, setModalOpen] = useState(false);
+  const [editLocation, setEditLocation] = useState<LocationRow | undefined>();
+  const [deleteId, setDeleteId] = useState<string | null>(null);
+  const [searchValue, setSearchValue] = useState(searchParams.get("search") ?? "");
+
+  const updateSearch = (value: string) => {
+    setSearchValue(value);
+    const params = new URLSearchParams(searchParams.toString());
+    if (value) {
+      params.set("search", value);
+      params.set("page", "1");
+    } else {
+      params.delete("search");
+    }
+    router.push(`${pathname}?${params.toString()}`, { scroll: false });
+  };
+
+  const columns = getLocationColumns({
+    onEdit: (location) => {
+      setEditLocation(location);
+      setModalOpen(true);
+    },
+    onArchive: (id) => {
+      startTransition(async () => {
+        const result = await archiveLocation(id);
+        if (result.success) toast.success("Location updated");
+        else toast.error(result.error);
+      });
+    },
+    onDelete: (id) => setDeleteId(id),
+  });
+
+  const { table } = useDataTable({ data, columns, pageCount });
+
+  const handleDelete = () => {
+    if (!deleteId) return;
+    startTransition(async () => {
+      const result = await deleteLocation(deleteId);
+      if (result.success) {
+        toast.success("Location deleted");
+        setDeleteId(null);
+      } else {
+        toast.error(result.error);
+      }
+    });
+  };
+
+  return (
+    <div className="space-y-4">
+      <PageHeader title="Locations" description="Manage your storage locations">
+        <Button
+          onClick={() => {
+            setEditLocation(undefined);
+            setModalOpen(true);
+          }}
+        >
+          <Plus className="mr-2 h-4 w-4" />
+          Add Location
+        </Button>
+      </PageHeader>
+
+      <div className="flex items-center gap-2">
+        <div className="relative flex-1 max-w-sm">
+          <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+          <Input
+            placeholder="Search locations..."
+            value={searchValue}
+            onChange={(e) => updateSearch(e.target.value)}
+            className="pl-9 h-9"
+          />
+        </div>
+        <DataTableViewOptions table={table} />
+      </div>
+
+      <DataTable table={table} emptyMessage="No locations found. Add your first location!" />
+      <DataTablePagination table={table} totalCount={totalCount} />
+
+      <LocationModal
+        open={modalOpen}
+        onOpenChange={(open) => {
+          setModalOpen(open);
+          if (!open) setEditLocation(undefined);
+        }}
+        location={editLocation}
+      />
+
+      <DeleteDialog
+        open={!!deleteId}
+        onOpenChange={(open) => !open && setDeleteId(null)}
+        title="Delete Location"
+        description="This will permanently delete this location. Items stored here will be unlinked."
+        onConfirm={handleDelete}
+        isLoading={isPending}
+      />
+    </div>
+  );
+}

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

@@ -0,0 +1,95 @@
+"use server";
+
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { locationSchema } from "@/schemas/location.schema";
+import { revalidatePath } from "next/cache";
+import type { ActionResult } from "@/types/api.types";
+
+export async function createLocation(input: unknown): Promise<ActionResult<{ id: string }>> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = locationSchema.safeParse(input);
+  if (!parsed.success) {
+    return { success: false, error: "Validation failed" };
+  }
+
+  try {
+    const location = await prisma.location.create({
+      data: {
+        ...parsed.data,
+        description: parsed.data.description || null,
+        userId: session.user.id,
+      },
+    });
+
+    revalidatePath("/locations");
+    return { success: true, data: { id: location.id } };
+  } catch {
+    return { success: false, error: "Failed to create location" };
+  }
+}
+
+export async function updateLocation(id: string, input: unknown): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = locationSchema.safeParse(input);
+  if (!parsed.success) {
+    return { success: false, error: "Validation failed" };
+  }
+
+  const existing = await prisma.location.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.location.update({
+      where: { id },
+      data: {
+        ...parsed.data,
+        description: parsed.data.description || null,
+      },
+    });
+
+    revalidatePath("/locations");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to update location" };
+  }
+}
+
+export async function deleteLocation(id: string): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const existing = await prisma.location.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.location.delete({ where: { id } });
+    revalidatePath("/locations");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to delete location" };
+  }
+}
+
+export async function archiveLocation(id: string): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const existing = await prisma.location.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.location.update({
+      where: { id },
+      data: { archived: !existing.archived },
+    });
+    revalidatePath("/locations");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to archive location" };
+  }
+}

src/app/(app)/locations/loading.tsx

@@ -0,0 +1,30 @@
+import { Skeleton } from "@/components/ui/skeleton";
+
+export default function LocationsLoading() {
+  return (
+    <div className="space-y-4">
+      <div className="flex items-center justify-between">
+        <div>
+          <Skeleton className="h-8 w-40" />
+          <Skeleton className="mt-1 h-4 w-60" />
+        </div>
+        <Skeleton className="h-9 w-32" />
+      </div>
+      <div className="flex items-center gap-2">
+        <Skeleton className="h-9 w-64" />
+        <Skeleton className="h-9 w-24" />
+      </div>
+      <div className="rounded-md border">
+        <div className="h-10 border-b bg-muted/50" />
+        {Array.from({ length: 5 }).map((_, i) => (
+          <div key={i} className="flex items-center gap-4 border-b px-4 py-2">
+            <Skeleton className="h-4 w-32" />
+            <Skeleton className="h-4 w-48" />
+            <Skeleton className="h-4 w-16" />
+            <Skeleton className="h-4 w-24" />
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}

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

@@ -0,0 +1,30 @@
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { getLocations } from "@/data/location.queries";
+import { LocationTable } from "./_components/location-table";
+
+interface LocationsPageProps {
+  searchParams: Promise<Record<string, string | string[] | undefined>>;
+}
+
+export default async function LocationsPage({ searchParams }: LocationsPageProps) {
+  const session = await auth();
+  if (!session?.user?.id) redirect("/login");
+
+  const params = await searchParams;
+  const { data, pageCount, totalCount } = await getLocations(session.user.id, {
+    page: typeof params.page === "string" ? params.page : "1",
+    perPage: typeof params.perPage === "string" ? params.perPage : "20",
+    sort: typeof params.sort === "string" ? params.sort : undefined,
+    order: typeof params.order === "string" ? (params.order as "asc" | "desc") : undefined,
+    search: typeof params.search === "string" ? params.search : undefined,
+  });
+
+  return (
+    <LocationTable
+      data={JSON.parse(JSON.stringify(data))}
+      pageCount={pageCount}
+      totalCount={totalCount}
+    />
+  );
+}

src/app/(app)/paints/_components/paint-columns.tsx

@@ -0,0 +1,190 @@
+"use client";
+
+import { type ColumnDef } from "@tanstack/react-table";
+import { MoreHorizontal, Pencil, Archive, Trash2, Droplet } from "lucide-react";
+import { DataTableColumnHeader } from "@/components/shared/data-table-column-header";
+import { StatusBadge, getStockStatus } from "@/components/shared/status-badge";
+import { ColorSwatch } from "@/components/shared/color-swatch";
+import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+
+export interface PaintRow {
+  id: string;
+  name: string;
+  brand: string;
+  line: string | null;
+  color: string;
+  colorHex: string;
+  finish: string;
+  volumeML: number;
+  usedML: number;
+  cost: number | null;
+  purchaseDate: Date | null;
+  notes: string | null;
+  archived: boolean;
+  vendor: { id: string; name: string } | null;
+  location: { id: string; name: string } | null;
+}
+
+interface PaintColumnsProps {
+  onEdit: (paint: PaintRow) => void;
+  onArchive: (id: string) => void;
+  onDelete: (id: string) => void;
+  onLogUsage: (paint: PaintRow) => void;
+  lowStockThreshold: number;
+}
+
+export function getPaintColumns({
+  onEdit,
+  onArchive,
+  onDelete,
+  onLogUsage,
+  lowStockThreshold,
+}: PaintColumnsProps): ColumnDef<PaintRow, unknown>[] {
+  return [
+    {
+      id: "color",
+      header: "",
+      cell: ({ row }) => <ColorSwatch hex={row.original.colorHex} size="sm" />,
+      enableHiding: false,
+      size: 40,
+    },
+    {
+      accessorKey: "name",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Name" />,
+      cell: ({ row }) => {
+        const remaining = row.original.volumeML - row.original.usedML;
+        const status = getStockStatus(
+          remaining,
+          row.original.volumeML,
+          lowStockThreshold,
+          row.original.archived
+        );
+        return (
+          <div className="flex items-center gap-2">
+            <span className="font-medium">{row.original.name}</span>
+            <StatusBadge variant={status} />
+          </div>
+        );
+      },
+      enableHiding: false,
+    },
+    {
+      accessorKey: "brand",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Brand" />,
+      cell: ({ row }) => (
+        <div className="flex flex-col">
+          <span className="text-sm">{row.original.brand}</span>
+          {row.original.line && (
+            <span className="text-xs text-muted-foreground">{row.original.line}</span>
+          )}
+        </div>
+      ),
+    },
+    {
+      accessorKey: "finish",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Finish" />,
+      cell: ({ row }) => (
+        <Badge variant="secondary" className="text-xs">
+          {row.original.finish}
+        </Badge>
+      ),
+    },
+    {
+      id: "remaining",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Remaining" />,
+      cell: ({ row }) => {
+        const remaining = row.original.volumeML - row.original.usedML;
+        const percent =
+          row.original.volumeML > 0
+            ? (remaining / row.original.volumeML) * 100
+            : 0;
+        const isLow = percent <= lowStockThreshold;
+        return (
+          <div className="flex items-center gap-2 min-w-[120px]">
+            <div className="flex-1 h-2 rounded-full bg-muted overflow-hidden">
+              <div
+                className={`h-full rounded-full transition-all ${
+                  isLow ? "bg-orange-500" : "bg-primary"
+                }`}
+                style={{ width: `${Math.max(0, Math.min(100, percent))}%` }}
+              />
+            </div>
+            <span className="text-xs text-muted-foreground w-14 text-right">
+              {remaining.toFixed(1)} ml
+            </span>
+          </div>
+        );
+      },
+    },
+    {
+      id: "location",
+      header: "Location",
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {row.original.location?.name ?? "\u2014"}
+        </span>
+      ),
+    },
+    {
+      id: "vendor",
+      header: "Vendor",
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {row.original.vendor?.name ?? "\u2014"}
+        </span>
+      ),
+    },
+    {
+      accessorKey: "cost",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Cost" />,
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {row.original.cost != null ? `\u20AC${row.original.cost.toFixed(2)}` : "\u2014"}
+        </span>
+      ),
+    },
+    {
+      id: "actions",
+      cell: ({ row }) => (
+        <DropdownMenu>
+          <DropdownMenuTrigger asChild>
+            <Button variant="ghost" size="icon" className="h-8 w-8">
+              <MoreHorizontal className="h-4 w-4" />
+            </Button>
+          </DropdownMenuTrigger>
+          <DropdownMenuContent align="end">
+            <DropdownMenuItem onClick={() => onEdit(row.original)}>
+              <Pencil className="mr-2 h-3.5 w-3.5" />
+              Edit
+            </DropdownMenuItem>
+            <DropdownMenuItem onClick={() => onLogUsage(row.original)}>
+              <Droplet className="mr-2 h-3.5 w-3.5" />
+              Log Usage
+            </DropdownMenuItem>
+            <DropdownMenuItem onClick={() => onArchive(row.original.id)}>
+              <Archive className="mr-2 h-3.5 w-3.5" />
+              {row.original.archived ? "Unarchive" : "Archive"}
+            </DropdownMenuItem>
+            <DropdownMenuSeparator />
+            <DropdownMenuItem
+              onClick={() => onDelete(row.original.id)}
+              className="text-destructive focus:text-destructive"
+            >
+              <Trash2 className="mr-2 h-3.5 w-3.5" />
+              Delete
+            </DropdownMenuItem>
+          </DropdownMenuContent>
+        </DropdownMenu>
+      ),
+      enableHiding: false,
+    },
+  ];
+}

src/app/(app)/paints/_components/paint-form.tsx

@@ -0,0 +1,380 @@
+"use client";
+
+import { useTransition } from "react";
+import { useForm } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { toast } from "sonner";
+import { paintSchema, type PaintInput } from "@/schemas/paint.schema";
+import { PAINT_FINISHES } from "@/lib/constants";
+import { createPaint, updatePaint } from "../actions";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Textarea } from "@/components/ui/textarea";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import {
+  Form,
+  FormControl,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
+import { ColorSwatch } from "@/components/shared/color-swatch";
+import { CatalogBrowserButton } from "@/components/shared/catalog-browser-button";
+import { AutocompleteInput } from "@/components/shared/autocomplete-input";
+import type { CatalogItem } from "@/types/catalog.types";
+
+interface PaintFormProps {
+  paint?: {
+    id: string;
+    name: string;
+    brand: string;
+    line: string | null;
+    color: string;
+    colorHex: string;
+    finish: string;
+    volumeML: number;
+    usedML: number;
+    cost: number | null;
+    purchaseDate: Date | null;
+    notes: string | null;
+    vendorId: string | null;
+    locationId: string | null;
+  };
+  vendors: { id: string; name: string }[];
+  locations: { id: string; name: string }[];
+  onSuccess: () => void;
+}
+
+export function PaintForm({ paint, vendors, locations, onSuccess }: PaintFormProps) {
+  const [isPending, startTransition] = useTransition();
+  const isEditing = !!paint;
+
+  const form = useForm<PaintInput>({
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    resolver: zodResolver(paintSchema) as any,
+    defaultValues: {
+      name: paint?.name ?? "",
+      brand: paint?.brand ?? "",
+      line: paint?.line ?? "",
+      color: paint?.color ?? "",
+      colorHex: paint?.colorHex ?? "#000000",
+      finish: (paint?.finish as PaintInput["finish"]) ?? "Matte",
+      volumeML: paint?.volumeML ?? 17,
+      usedML: paint?.usedML ?? 0,
+      cost: paint?.cost ?? undefined,
+      purchaseDate: paint?.purchaseDate
+        ? new Date(paint.purchaseDate).toISOString().split("T")[0]
+        : "",
+      notes: paint?.notes ?? "",
+      vendorId: paint?.vendorId ?? "",
+      locationId: paint?.locationId ?? "",
+    },
+  });
+
+  const watchColorHex = form.watch("colorHex");
+
+  function handleCatalogSelect(item: CatalogItem) {
+    form.setValue("name", item.name);
+    form.setValue("brand", item.brand);
+    if (item.color) form.setValue("color", item.color);
+    if (item.colorHex) form.setValue("colorHex", item.colorHex);
+    if (item.line) form.setValue("line", item.line);
+    if (item.finish) {
+      const match = PAINT_FINISHES.find(
+        (f) => f.toUpperCase() === item.finish!.toUpperCase(),
+      );
+      if (match) form.setValue("finish", match);
+    }
+    if (item.volume) form.setValue("volumeML", item.volume);
+    if (item.price != null) form.setValue("cost", item.price);
+  }
+
+  function onSubmit(values: PaintInput) {
+    startTransition(async () => {
+      const result = isEditing
+        ? await updatePaint(paint!.id, values)
+        : await createPaint(values);
+
+      if (!result.success) {
+        toast.error(result.error);
+        return;
+      }
+
+      toast.success(isEditing ? "Paint updated" : "Paint created");
+      form.reset();
+      onSuccess();
+    });
+  }
+
+  return (
+    <Form {...form}>
+      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
+        {!isEditing && (
+          <div className="flex items-center justify-between">
+            <p className="text-sm text-muted-foreground">
+              Auto-fill from product catalog
+            </p>
+            <CatalogBrowserButton type="paint" onSelect={handleCatalogSelect} />
+          </div>
+        )}
+
+        <div className="grid grid-cols-2 gap-4">
+          <FormField
+            control={form.control}
+            name="name"
+            render={({ field }) => (
+              <FormItem className="col-span-2">
+                <FormLabel>Name</FormLabel>
+                <FormControl>
+                  {!isEditing ? (
+                    <AutocompleteInput
+                      type="paint"
+                      value={field.value}
+                      onChange={field.onChange}
+                      onSelectItem={handleCatalogSelect}
+                      placeholder="Paint name — type to search catalog"
+                    />
+                  ) : (
+                    <Input placeholder="Paint name" {...field} />
+                  )}
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="brand"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Brand</FormLabel>
+                <FormControl>
+                  <Input placeholder="Brand name" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="line"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Product Line</FormLabel>
+                <FormControl>
+                  <Input placeholder="e.g. Base, Layer, Contrast" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="finish"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Finish</FormLabel>
+                <Select onValueChange={field.onChange} value={field.value}>
+                  <FormControl>
+                    <SelectTrigger>
+                      <SelectValue placeholder="Select finish" />
+                    </SelectTrigger>
+                  </FormControl>
+                  <SelectContent>
+                    {PAINT_FINISHES.map((f) => (
+                      <SelectItem key={f} value={f}>
+                        {f}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="color"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Color Name</FormLabel>
+                <FormControl>
+                  <Input placeholder="e.g. Retributor Armour" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="colorHex"
+            render={({ field }) => (
+              <FormItem className="col-span-2">
+                <FormLabel>Color Hex</FormLabel>
+                <div className="flex items-center gap-2">
+                  <FormControl>
+                    <Input placeholder="#000000" {...field} className="flex-1" />
+                  </FormControl>
+                  <input
+                    type="color"
+                    value={field.value}
+                    onChange={(e) => field.onChange(e.target.value)}
+                    className="h-9 w-9 cursor-pointer rounded border border-border bg-transparent p-0.5"
+                  />
+                  <ColorSwatch hex={watchColorHex || "#000000"} size="md" />
+                </div>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="volumeML"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Volume (ml)</FormLabel>
+                <FormControl>
+                  <Input type="number" step="0.1" min="0" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="usedML"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Used (ml)</FormLabel>
+                <FormControl>
+                  <Input type="number" step="0.1" min="0" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="vendorId"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Vendor</FormLabel>
+                <Select
+                  onValueChange={(val) => field.onChange(val === "none" ? "" : val)}
+                  value={field.value || "none"}
+                >
+                  <FormControl>
+                    <SelectTrigger>
+                      <SelectValue placeholder="Select vendor" />
+                    </SelectTrigger>
+                  </FormControl>
+                  <SelectContent>
+                    <SelectItem value="none">None</SelectItem>
+                    {vendors.map((v) => (
+                      <SelectItem key={v.id} value={v.id}>
+                        {v.name}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="locationId"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Location</FormLabel>
+                <Select
+                  onValueChange={(val) => field.onChange(val === "none" ? "" : val)}
+                  value={field.value || "none"}
+                >
+                  <FormControl>
+                    <SelectTrigger>
+                      <SelectValue placeholder="Select location" />
+                    </SelectTrigger>
+                  </FormControl>
+                  <SelectContent>
+                    <SelectItem value="none">None</SelectItem>
+                    {locations.map((l) => (
+                      <SelectItem key={l.id} value={l.id}>
+                        {l.name}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="cost"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Cost</FormLabel>
+                <FormControl>
+                  <Input type="number" step="0.01" min="0" placeholder="0.00" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="purchaseDate"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Purchase Date</FormLabel>
+                <FormControl>
+                  <Input type="date" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="notes"
+            render={({ field }) => (
+              <FormItem className="col-span-2">
+                <FormLabel>Notes</FormLabel>
+                <FormControl>
+                  <Textarea placeholder="Optional notes" rows={2} {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+        </div>
+
+        <div className="flex justify-end gap-2">
+          <Button type="submit" disabled={isPending}>
+            {isPending ? "Saving..." : isEditing ? "Update" : "Create"}
+          </Button>
+        </div>
+      </form>
+    </Form>
+  );
+}

src/app/(app)/paints/_components/paint-modal.tsx

@@ -0,0 +1,50 @@
+"use client";
+
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { ScrollArea } from "@/components/ui/scroll-area";
+import { PaintForm } from "./paint-form";
+
+interface PaintModalProps {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  paint?: Parameters<typeof PaintForm>[0]["paint"];
+  vendors: { id: string; name: string }[];
+  locations: { id: string; name: string }[];
+}
+
+export function PaintModal({
+  open,
+  onOpenChange,
+  paint,
+  vendors,
+  locations,
+}: PaintModalProps) {
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent className="sm:max-w-2xl max-h-[90vh]">
+        <DialogHeader>
+          <DialogTitle>{paint ? "Edit Paint" : "Add Paint"}</DialogTitle>
+          <DialogDescription>
+            {paint
+              ? "Update the paint details below."
+              : "Add a new paint to your inventory."}
+          </DialogDescription>
+        </DialogHeader>
+        <ScrollArea className="max-h-[70vh] pr-4">
+          <PaintForm
+            paint={paint}
+            vendors={vendors}
+            locations={locations}
+            onSuccess={() => onOpenChange(false)}
+          />
+        </ScrollArea>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/app/(app)/paints/_components/paint-table.tsx

@@ -0,0 +1,214 @@
+"use client";
+
+import { useState, useTransition, useCallback } from "react";
+import { useRouter, usePathname, useSearchParams } from "next/navigation";
+import { Plus, Search } from "lucide-react";
+import { toast } from "sonner";
+import { useDataTable } from "@/hooks/use-data-table";
+import { PAINT_FINISHES } from "@/lib/constants";
+import { getPaintColumns, type PaintRow } from "./paint-columns";
+import { PaintModal } from "./paint-modal";
+import { deletePaint, archivePaint, logPaintUsage } 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";
+import { DataTableFacetedFilter } from "@/components/shared/data-table-faceted-filter";
+import { DeleteDialog } from "@/components/shared/delete-dialog";
+import { UsageLogDialog } from "@/components/shared/usage-log-dialog";
+import { PageHeader } from "@/components/shared/page-header";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+
+interface PaintTableProps {
+  data: PaintRow[];
+  pageCount: number;
+  totalCount: number;
+  vendors: { id: string; name: string }[];
+  locations: { id: string; name: string }[];
+  lowStockThreshold: number;
+}
+
+export function PaintTable({
+  data,
+  pageCount,
+  totalCount,
+  vendors,
+  locations,
+  lowStockThreshold,
+}: PaintTableProps) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const searchParams = useSearchParams();
+  const [isPending, startTransition] = useTransition();
+
+  const [modalOpen, setModalOpen] = useState(false);
+  const [editPaint, setEditPaint] = useState<PaintRow | undefined>();
+  const [deleteId, setDeleteId] = useState<string | null>(null);
+  const [usagePaint, setUsagePaint] = useState<PaintRow | null>(null);
+  const [searchValue, setSearchValue] = useState(searchParams.get("search") ?? "");
+
+  const finishFilter = new Set(searchParams.getAll("finish"));
+  const vendorFilter = new Set(searchParams.getAll("vendor"));
+  const locationFilter = new Set(searchParams.getAll("location"));
+
+  const updateFilters = useCallback(
+    (key: string, values: Set<string>) => {
+      const params = new URLSearchParams(searchParams.toString());
+      params.delete(key);
+      values.forEach((v) => params.append(key, v));
+      params.set("page", "1");
+      router.push(`${pathname}?${params.toString()}`, { scroll: false });
+    },
+    [router, pathname, searchParams]
+  );
+
+  const updateSearch = (value: string) => {
+    setSearchValue(value);
+    const params = new URLSearchParams(searchParams.toString());
+    if (value) {
+      params.set("search", value);
+      params.set("page", "1");
+    } else {
+      params.delete("search");
+    }
+    router.push(`${pathname}?${params.toString()}`, { scroll: false });
+  };
+
+  const columns = getPaintColumns({
+    onEdit: (paint) => {
+      setEditPaint(paint);
+      setModalOpen(true);
+    },
+    onArchive: (id) => {
+      startTransition(async () => {
+        const result = await archivePaint(id);
+        if (result.success) toast.success("Paint updated");
+        else toast.error(result.error);
+      });
+    },
+    onDelete: (id) => setDeleteId(id),
+    onLogUsage: (paint) => setUsagePaint(paint),
+    lowStockThreshold,
+  });
+
+  const { table } = useDataTable({ data, columns, pageCount });
+
+  const handleDelete = () => {
+    if (!deleteId) return;
+    startTransition(async () => {
+      const result = await deletePaint(deleteId);
+      if (result.success) {
+        toast.success("Paint deleted");
+        setDeleteId(null);
+      } else {
+        toast.error(result.error);
+      }
+    });
+  };
+
+  const finishOptions = PAINT_FINISHES.map((f) => ({ label: f, value: f }));
+  const vendorOptions = vendors.map((v) => ({ label: v.name, value: v.id }));
+  const locationOptions = locations.map((l) => ({ label: l.name, value: l.id }));
+
+  return (
+    <div className="space-y-4">
+      <PageHeader title="Paints" description="Manage your miniature paint collection">
+        <Button
+          onClick={() => {
+            setEditPaint(undefined);
+            setModalOpen(true);
+          }}
+        >
+          <Plus className="mr-2 h-4 w-4" />
+          Add Paint
+        </Button>
+      </PageHeader>
+
+      <div className="flex flex-wrap items-center gap-2">
+        <div className="relative flex-1 min-w-[200px] max-w-sm">
+          <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+          <Input
+            placeholder="Search paints..."
+            value={searchValue}
+            onChange={(e) => updateSearch(e.target.value)}
+            className="pl-9 h-9"
+          />
+        </div>
+        <DataTableFacetedFilter
+          title="Finish"
+          options={finishOptions}
+          selectedValues={finishFilter}
+          onSelectionChange={(values) => updateFilters("finish", values)}
+        />
+        <DataTableFacetedFilter
+          title="Vendor"
+          options={vendorOptions}
+          selectedValues={vendorFilter}
+          onSelectionChange={(values) => updateFilters("vendor", values)}
+        />
+        <DataTableFacetedFilter
+          title="Location"
+          options={locationOptions}
+          selectedValues={locationFilter}
+          onSelectionChange={(values) => updateFilters("location", values)}
+        />
+        <DataTableViewOptions table={table} />
+      </div>
+
+      <DataTable table={table} emptyMessage="No paints found. Add your first paint!" />
+      <DataTablePagination table={table} totalCount={totalCount} />
+
+      <PaintModal
+        open={modalOpen}
+        onOpenChange={(open) => {
+          setModalOpen(open);
+          if (!open) setEditPaint(undefined);
+        }}
+        paint={
+          editPaint
+            ? {
+                id: editPaint.id,
+                name: editPaint.name,
+                brand: editPaint.brand,
+                line: editPaint.line,
+                color: editPaint.color,
+                colorHex: editPaint.colorHex,
+                finish: editPaint.finish,
+                volumeML: editPaint.volumeML,
+                usedML: editPaint.usedML,
+                cost: editPaint.cost,
+                purchaseDate: editPaint.purchaseDate,
+                notes: editPaint.notes,
+                vendorId: editPaint.vendor?.id ?? null,
+                locationId: editPaint.location?.id ?? null,
+              }
+            : undefined
+        }
+        vendors={vendors}
+        locations={locations}
+      />
+
+      <DeleteDialog
+        open={!!deleteId}
+        onOpenChange={(open) => !open && setDeleteId(null)}
+        title="Delete Paint"
+        description="This will permanently delete this paint and all its usage logs."
+        onConfirm={handleDelete}
+        isLoading={isPending}
+      />
+
+      {usagePaint && (
+        <UsageLogDialog
+          open={!!usagePaint}
+          onOpenChange={(open) => !open && setUsagePaint(null)}
+          itemName={usagePaint.name}
+          unit="ml"
+          onSubmit={async (amount, notes) => {
+            const result = await logPaintUsage(usagePaint.id, { amount, notes });
+            return result;
+          }}
+        />
+      )}
+    </div>
+  );
+}

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

@@ -0,0 +1,155 @@
+"use server";
+
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { paintSchema } from "@/schemas/paint.schema";
+import { usageLogSchema } from "@/schemas/usage-log.schema";
+import { revalidatePath } from "next/cache";
+import type { ActionResult } from "@/types/api.types";
+
+export async function createPaint(input: unknown): Promise<ActionResult<{ id: string }>> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = paintSchema.safeParse(input);
+  if (!parsed.success) return { success: false, error: "Validation failed" };
+
+  try {
+    const paint = await prisma.paint.create({
+      data: {
+        name: parsed.data.name,
+        brand: parsed.data.brand,
+        line: parsed.data.line || null,
+        color: parsed.data.color,
+        colorHex: parsed.data.colorHex,
+        finish: parsed.data.finish,
+        volumeML: parsed.data.volumeML,
+        usedML: parsed.data.usedML,
+        purchaseDate: parsed.data.purchaseDate ? new Date(parsed.data.purchaseDate) : null,
+        cost: parsed.data.cost ?? null,
+        notes: parsed.data.notes || null,
+        vendorId: parsed.data.vendorId || null,
+        locationId: parsed.data.locationId || null,
+        userId: session.user.id,
+      },
+    });
+
+    revalidatePath("/paints");
+    revalidatePath("/dashboard");
+    return { success: true, data: { id: paint.id } };
+  } catch {
+    return { success: false, error: "Failed to create paint" };
+  }
+}
+
+export async function updatePaint(id: string, input: unknown): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = paintSchema.safeParse(input);
+  if (!parsed.success) return { success: false, error: "Validation failed" };
+
+  const existing = await prisma.paint.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.paint.update({
+      where: { id },
+      data: {
+        name: parsed.data.name,
+        brand: parsed.data.brand,
+        line: parsed.data.line || null,
+        color: parsed.data.color,
+        colorHex: parsed.data.colorHex,
+        finish: parsed.data.finish,
+        volumeML: parsed.data.volumeML,
+        usedML: parsed.data.usedML,
+        purchaseDate: parsed.data.purchaseDate ? new Date(parsed.data.purchaseDate) : null,
+        cost: parsed.data.cost ?? null,
+        notes: parsed.data.notes || null,
+        vendorId: parsed.data.vendorId || null,
+        locationId: parsed.data.locationId || null,
+      },
+    });
+
+    revalidatePath("/paints");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to update paint" };
+  }
+}
+
+export async function deletePaint(id: string): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const existing = await prisma.paint.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.paint.delete({ where: { id } });
+    revalidatePath("/paints");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to delete paint" };
+  }
+}
+
+export async function archivePaint(id: string): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const existing = await prisma.paint.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.paint.update({
+      where: { id },
+      data: { archived: !existing.archived },
+    });
+    revalidatePath("/paints");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to archive paint" };
+  }
+}
+
+export async function logPaintUsage(paintId: string, input: unknown): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = usageLogSchema.safeParse(input);
+  if (!parsed.success) return { success: false, error: "Validation failed" };
+
+  const existing = await prisma.paint.findFirst({ where: { id: paintId, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.$transaction([
+      prisma.usageLog.create({
+        data: {
+          itemType: "PAINT",
+          itemId: paintId,
+          paintId,
+          amount: parsed.data.amount,
+          unit: "ml",
+          notes: parsed.data.notes || null,
+          userId: session.user.id,
+        },
+      }),
+      prisma.paint.update({
+        where: { id: paintId },
+        data: { usedML: { increment: parsed.data.amount } },
+      }),
+    ]);
+
+    revalidatePath("/paints");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to log usage" };
+  }
+}

src/app/(app)/paints/loading.tsx

@@ -0,0 +1,34 @@
+import { Skeleton } from "@/components/ui/skeleton";
+
+export default function PaintsLoading() {
+  return (
+    <div className="space-y-4">
+      <div className="flex items-center justify-between">
+        <div>
+          <Skeleton className="h-8 w-32" />
+          <Skeleton className="mt-1 h-4 w-56" />
+        </div>
+        <Skeleton className="h-9 w-28" />
+      </div>
+      <div className="flex flex-wrap items-center gap-2">
+        <Skeleton className="h-9 w-64" />
+        <Skeleton className="h-9 w-24" />
+        <Skeleton className="h-9 w-24" />
+        <Skeleton className="h-9 w-24" />
+      </div>
+      <div className="rounded-md border">
+        <div className="h-10 border-b bg-muted/50" />
+        {Array.from({ length: 5 }).map((_, i) => (
+          <div key={i} className="flex items-center gap-4 border-b px-4 py-2">
+            <Skeleton className="h-5 w-5 rounded" />
+            <Skeleton className="h-4 w-32" />
+            <Skeleton className="h-4 w-20" />
+            <Skeleton className="h-4 w-20" />
+            <Skeleton className="h-4 w-24" />
+            <Skeleton className="h-4 w-16" />
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}

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

@@ -0,0 +1,44 @@
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { getPaints } from "@/data/paint.queries";
+import { getVendorOptions } from "@/data/vendor.queries";
+import { getLocationOptions } from "@/data/location.queries";
+import { getUserSettings } from "@/data/settings.queries";
+import { PaintTable } from "./_components/paint-table";
+
+interface PaintsPageProps {
+  searchParams: Promise<Record<string, string | string[] | undefined>>;
+}
+
+export default async function PaintsPage({ searchParams }: PaintsPageProps) {
+  const session = await auth();
+  if (!session?.user?.id) redirect("/login");
+
+  const params = await searchParams;
+  const [paintsResult, vendors, locations, settings] = await Promise.all([
+    getPaints(session.user.id, {
+      page: typeof params.page === "string" ? params.page : "1",
+      perPage: typeof params.perPage === "string" ? params.perPage : "20",
+      sort: typeof params.sort === "string" ? params.sort : undefined,
+      order: typeof params.order === "string" ? (params.order as "asc" | "desc") : undefined,
+      search: typeof params.search === "string" ? params.search : undefined,
+      finish: params.finish,
+      vendor: params.vendor,
+      location: params.location,
+    }),
+    getVendorOptions(session.user.id),
+    getLocationOptions(session.user.id),
+    getUserSettings(session.user.id),
+  ]);
+
+  return (
+    <PaintTable
+      data={JSON.parse(JSON.stringify(paintsResult.data))}
+      pageCount={paintsResult.pageCount}
+      totalCount={paintsResult.totalCount}
+      vendors={vendors}
+      locations={locations}
+      lowStockThreshold={settings.lowStockThreshold}
+    />
+  );
+}

src/app/(app)/resins/_components/resin-columns.tsx

@@ -0,0 +1,184 @@
+"use client";
+
+import { type ColumnDef } from "@tanstack/react-table";
+import { MoreHorizontal, Pencil, Archive, Trash2, FlaskConical } from "lucide-react";
+import { DataTableColumnHeader } from "@/components/shared/data-table-column-header";
+import { StatusBadge, getStockStatus } from "@/components/shared/status-badge";
+import { ColorSwatch } from "@/components/shared/color-swatch";
+import { Badge } from "@/components/ui/badge";
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+
+export interface ResinRow {
+  id: string;
+  name: string;
+  brand: string;
+  resinType: string;
+  color: string;
+  colorHex: string;
+  bottleSize: number;
+  usedML: number;
+  cost: number | null;
+  purchaseDate: Date | null;
+  notes: string | null;
+  archived: boolean;
+  vendor: { id: string; name: string } | null;
+  location: { id: string; name: string } | null;
+}
+
+interface ResinColumnsProps {
+  onEdit: (resin: ResinRow) => void;
+  onArchive: (id: string) => void;
+  onDelete: (id: string) => void;
+  onLogUsage: (resin: ResinRow) => void;
+  lowStockThreshold: number;
+}
+
+export function getResinColumns({
+  onEdit,
+  onArchive,
+  onDelete,
+  onLogUsage,
+  lowStockThreshold,
+}: ResinColumnsProps): ColumnDef<ResinRow, unknown>[] {
+  return [
+    {
+      id: "color",
+      header: "",
+      cell: ({ row }) => <ColorSwatch hex={row.original.colorHex} size="sm" />,
+      enableHiding: false,
+      size: 40,
+    },
+    {
+      accessorKey: "name",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Name" />,
+      cell: ({ row }) => {
+        const remaining = row.original.bottleSize - row.original.usedML;
+        const status = getStockStatus(
+          remaining,
+          row.original.bottleSize,
+          lowStockThreshold,
+          row.original.archived
+        );
+        return (
+          <div className="flex items-center gap-2">
+            <span className="font-medium">{row.original.name}</span>
+            <StatusBadge variant={status} />
+          </div>
+        );
+      },
+      enableHiding: false,
+    },
+    {
+      accessorKey: "brand",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Brand" />,
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">{row.original.brand}</span>
+      ),
+    },
+    {
+      accessorKey: "resinType",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Type" />,
+      cell: ({ row }) => (
+        <Badge variant="secondary" className="text-xs">
+          {row.original.resinType}
+        </Badge>
+      ),
+    },
+    {
+      id: "remaining",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Remaining" />,
+      cell: ({ row }) => {
+        const remaining = row.original.bottleSize - row.original.usedML;
+        const percent =
+          row.original.bottleSize > 0
+            ? (remaining / row.original.bottleSize) * 100
+            : 0;
+        const isLow = percent <= lowStockThreshold;
+        return (
+          <div className="flex items-center gap-2 min-w-[120px]">
+            <div className="flex-1 h-2 rounded-full bg-muted overflow-hidden">
+              <div
+                className={`h-full rounded-full transition-all ${
+                  isLow ? "bg-orange-500" : "bg-primary"
+                }`}
+                style={{ width: `${Math.max(0, Math.min(100, percent))}%` }}
+              />
+            </div>
+            <span className="text-xs text-muted-foreground w-16 text-right">
+              {remaining.toFixed(0)} ml
+            </span>
+          </div>
+        );
+      },
+    },
+    {
+      id: "location",
+      header: "Location",
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {row.original.location?.name ?? "\u2014"}
+        </span>
+      ),
+    },
+    {
+      id: "vendor",
+      header: "Vendor",
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {row.original.vendor?.name ?? "\u2014"}
+        </span>
+      ),
+    },
+    {
+      accessorKey: "cost",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Cost" />,
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {row.original.cost != null ? `\u20AC${row.original.cost.toFixed(2)}` : "\u2014"}
+        </span>
+      ),
+    },
+    {
+      id: "actions",
+      cell: ({ row }) => (
+        <DropdownMenu>
+          <DropdownMenuTrigger asChild>
+            <Button variant="ghost" size="icon" className="h-8 w-8">
+              <MoreHorizontal className="h-4 w-4" />
+            </Button>
+          </DropdownMenuTrigger>
+          <DropdownMenuContent align="end">
+            <DropdownMenuItem onClick={() => onEdit(row.original)}>
+              <Pencil className="mr-2 h-3.5 w-3.5" />
+              Edit
+            </DropdownMenuItem>
+            <DropdownMenuItem onClick={() => onLogUsage(row.original)}>
+              <FlaskConical className="mr-2 h-3.5 w-3.5" />
+              Log Usage
+            </DropdownMenuItem>
+            <DropdownMenuItem onClick={() => onArchive(row.original.id)}>
+              <Archive className="mr-2 h-3.5 w-3.5" />
+              {row.original.archived ? "Unarchive" : "Archive"}
+            </DropdownMenuItem>
+            <DropdownMenuSeparator />
+            <DropdownMenuItem
+              onClick={() => onDelete(row.original.id)}
+              className="text-destructive focus:text-destructive"
+            >
+              <Trash2 className="mr-2 h-3.5 w-3.5" />
+              Delete
+            </DropdownMenuItem>
+          </DropdownMenuContent>
+        </DropdownMenu>
+      ),
+      enableHiding: false,
+    },
+  ];
+}

src/app/(app)/resins/_components/resin-form.tsx

@@ -0,0 +1,363 @@
+"use client";
+
+import { useTransition } from "react";
+import { useForm } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { toast } from "sonner";
+import { resinSchema, type ResinInput } from "@/schemas/resin.schema";
+import { RESIN_TYPES } from "@/lib/constants";
+import { createResin, updateResin } from "../actions";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Textarea } from "@/components/ui/textarea";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import {
+  Form,
+  FormControl,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
+import { ColorSwatch } from "@/components/shared/color-swatch";
+import { CatalogBrowserButton } from "@/components/shared/catalog-browser-button";
+import { AutocompleteInput } from "@/components/shared/autocomplete-input";
+import type { CatalogItem } from "@/types/catalog.types";
+
+interface ResinFormProps {
+  resin?: {
+    id: string;
+    name: string;
+    brand: string;
+    resinType: string;
+    color: string;
+    colorHex: string;
+    bottleSize: number;
+    usedML: number;
+    cost: number | null;
+    purchaseDate: Date | null;
+    notes: string | null;
+    vendorId: string | null;
+    locationId: string | null;
+  };
+  vendors: { id: string; name: string }[];
+  locations: { id: string; name: string }[];
+  onSuccess: () => void;
+}
+
+export function ResinForm({ resin, vendors, locations, onSuccess }: ResinFormProps) {
+  const [isPending, startTransition] = useTransition();
+  const isEditing = !!resin;
+
+  const form = useForm<ResinInput>({
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    resolver: zodResolver(resinSchema) as any,
+    defaultValues: {
+      name: resin?.name ?? "",
+      brand: resin?.brand ?? "",
+      resinType: (resin?.resinType as ResinInput["resinType"]) ?? "Standard",
+      color: resin?.color ?? "",
+      colorHex: resin?.colorHex ?? "#000000",
+      bottleSize: resin?.bottleSize ?? 500,
+      usedML: resin?.usedML ?? 0,
+      cost: resin?.cost ?? undefined,
+      purchaseDate: resin?.purchaseDate
+        ? new Date(resin.purchaseDate).toISOString().split("T")[0]
+        : "",
+      notes: resin?.notes ?? "",
+      vendorId: resin?.vendorId ?? "",
+      locationId: resin?.locationId ?? "",
+    },
+  });
+
+  const watchColorHex = form.watch("colorHex");
+
+  function handleCatalogSelect(item: CatalogItem) {
+    form.setValue("name", item.name);
+    form.setValue("brand", item.brand);
+    if (item.color) form.setValue("color", item.color);
+    if (item.colorHex) form.setValue("colorHex", item.colorHex);
+    if (item.resinType) {
+      const match = RESIN_TYPES.find(
+        (t) => t.toUpperCase() === item.resinType!.toUpperCase(),
+      );
+      if (match) form.setValue("resinType", match);
+    }
+    if (item.volume) form.setValue("bottleSize", item.volume);
+    if (item.price != null) form.setValue("cost", item.price);
+  }
+
+  function onSubmit(values: ResinInput) {
+    startTransition(async () => {
+      const result = isEditing
+        ? await updateResin(resin!.id, values)
+        : await createResin(values);
+
+      if (!result.success) {
+        toast.error(result.error);
+        return;
+      }
+
+      toast.success(isEditing ? "Resin updated" : "Resin created");
+      form.reset();
+      onSuccess();
+    });
+  }
+
+  return (
+    <Form {...form}>
+      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
+        {!isEditing && (
+          <div className="flex items-center justify-between">
+            <p className="text-sm text-muted-foreground">
+              Auto-fill from product catalog
+            </p>
+            <CatalogBrowserButton type="resin" onSelect={handleCatalogSelect} />
+          </div>
+        )}
+
+        <div className="grid grid-cols-2 gap-4">
+          <FormField
+            control={form.control}
+            name="name"
+            render={({ field }) => (
+              <FormItem className="col-span-2">
+                <FormLabel>Name</FormLabel>
+                <FormControl>
+                  {!isEditing ? (
+                    <AutocompleteInput
+                      type="resin"
+                      value={field.value}
+                      onChange={field.onChange}
+                      onSelectItem={handleCatalogSelect}
+                      placeholder="Resin name — type to search catalog"
+                    />
+                  ) : (
+                    <Input placeholder="Resin name" {...field} />
+                  )}
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="brand"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Brand</FormLabel>
+                <FormControl>
+                  <Input placeholder="Brand name" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="resinType"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Type</FormLabel>
+                <Select onValueChange={field.onChange} value={field.value}>
+                  <FormControl>
+                    <SelectTrigger>
+                      <SelectValue placeholder="Select type" />
+                    </SelectTrigger>
+                  </FormControl>
+                  <SelectContent>
+                    {RESIN_TYPES.map((t) => (
+                      <SelectItem key={t} value={t}>
+                        {t}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="color"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Color Name</FormLabel>
+                <FormControl>
+                  <Input placeholder="e.g. Clear Grey" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="colorHex"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Color Hex</FormLabel>
+                <div className="flex items-center gap-2">
+                  <FormControl>
+                    <Input placeholder="#000000" {...field} className="flex-1" />
+                  </FormControl>
+                  <input
+                    type="color"
+                    value={field.value}
+                    onChange={(e) => field.onChange(e.target.value)}
+                    className="h-9 w-9 cursor-pointer rounded border border-border bg-transparent p-0.5"
+                  />
+                  <ColorSwatch hex={watchColorHex || "#000000"} size="md" />
+                </div>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="bottleSize"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Bottle Size (ml)</FormLabel>
+                <FormControl>
+                  <Input type="number" step="1" min="0" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="usedML"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Used (ml)</FormLabel>
+                <FormControl>
+                  <Input type="number" step="0.1" min="0" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="vendorId"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Vendor</FormLabel>
+                <Select
+                  onValueChange={(val) => field.onChange(val === "none" ? "" : val)}
+                  value={field.value || "none"}
+                >
+                  <FormControl>
+                    <SelectTrigger>
+                      <SelectValue placeholder="Select vendor" />
+                    </SelectTrigger>
+                  </FormControl>
+                  <SelectContent>
+                    <SelectItem value="none">None</SelectItem>
+                    {vendors.map((v) => (
+                      <SelectItem key={v.id} value={v.id}>
+                        {v.name}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="locationId"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Location</FormLabel>
+                <Select
+                  onValueChange={(val) => field.onChange(val === "none" ? "" : val)}
+                  value={field.value || "none"}
+                >
+                  <FormControl>
+                    <SelectTrigger>
+                      <SelectValue placeholder="Select location" />
+                    </SelectTrigger>
+                  </FormControl>
+                  <SelectContent>
+                    <SelectItem value="none">None</SelectItem>
+                    {locations.map((l) => (
+                      <SelectItem key={l.id} value={l.id}>
+                        {l.name}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="cost"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Cost</FormLabel>
+                <FormControl>
+                  <Input type="number" step="0.01" min="0" placeholder="0.00" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="purchaseDate"
+            render={({ field }) => (
+              <FormItem>
+                <FormLabel>Purchase Date</FormLabel>
+                <FormControl>
+                  <Input type="date" {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+
+          <FormField
+            control={form.control}
+            name="notes"
+            render={({ field }) => (
+              <FormItem className="col-span-2">
+                <FormLabel>Notes</FormLabel>
+                <FormControl>
+                  <Textarea placeholder="Optional notes" rows={2} {...field} />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            )}
+          />
+        </div>
+
+        <div className="flex justify-end gap-2">
+          <Button type="submit" disabled={isPending}>
+            {isPending ? "Saving..." : isEditing ? "Update" : "Create"}
+          </Button>
+        </div>
+      </form>
+    </Form>
+  );
+}

src/app/(app)/resins/_components/resin-modal.tsx

@@ -0,0 +1,50 @@
+"use client";
+
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { ScrollArea } from "@/components/ui/scroll-area";
+import { ResinForm } from "./resin-form";
+
+interface ResinModalProps {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  resin?: Parameters<typeof ResinForm>[0]["resin"];
+  vendors: { id: string; name: string }[];
+  locations: { id: string; name: string }[];
+}
+
+export function ResinModal({
+  open,
+  onOpenChange,
+  resin,
+  vendors,
+  locations,
+}: ResinModalProps) {
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent className="sm:max-w-2xl max-h-[90vh]">
+        <DialogHeader>
+          <DialogTitle>{resin ? "Edit Resin" : "Add Resin"}</DialogTitle>
+          <DialogDescription>
+            {resin
+              ? "Update the resin details below."
+              : "Add a new resin bottle to your inventory."}
+          </DialogDescription>
+        </DialogHeader>
+        <ScrollArea className="max-h-[70vh] pr-4">
+          <ResinForm
+            resin={resin}
+            vendors={vendors}
+            locations={locations}
+            onSuccess={() => onOpenChange(false)}
+          />
+        </ScrollArea>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/app/(app)/resins/_components/resin-table.tsx

@@ -0,0 +1,213 @@
+"use client";
+
+import { useState, useTransition, useCallback } from "react";
+import { useRouter, usePathname, useSearchParams } from "next/navigation";
+import { Plus, Search } from "lucide-react";
+import { toast } from "sonner";
+import { useDataTable } from "@/hooks/use-data-table";
+import { RESIN_TYPES } from "@/lib/constants";
+import { getResinColumns, type ResinRow } from "./resin-columns";
+import { ResinModal } from "./resin-modal";
+import { deleteResin, archiveResin, logResinUsage } 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";
+import { DataTableFacetedFilter } from "@/components/shared/data-table-faceted-filter";
+import { DeleteDialog } from "@/components/shared/delete-dialog";
+import { UsageLogDialog } from "@/components/shared/usage-log-dialog";
+import { PageHeader } from "@/components/shared/page-header";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+
+interface ResinTableProps {
+  data: ResinRow[];
+  pageCount: number;
+  totalCount: number;
+  vendors: { id: string; name: string }[];
+  locations: { id: string; name: string }[];
+  lowStockThreshold: number;
+}
+
+export function ResinTable({
+  data,
+  pageCount,
+  totalCount,
+  vendors,
+  locations,
+  lowStockThreshold,
+}: ResinTableProps) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const searchParams = useSearchParams();
+  const [isPending, startTransition] = useTransition();
+
+  const [modalOpen, setModalOpen] = useState(false);
+  const [editResin, setEditResin] = useState<ResinRow | undefined>();
+  const [deleteId, setDeleteId] = useState<string | null>(null);
+  const [usageResin, setUsageResin] = useState<ResinRow | null>(null);
+  const [searchValue, setSearchValue] = useState(searchParams.get("search") ?? "");
+
+  const resinTypeFilter = new Set(searchParams.getAll("resinType"));
+  const vendorFilter = new Set(searchParams.getAll("vendor"));
+  const locationFilter = new Set(searchParams.getAll("location"));
+
+  const updateFilters = useCallback(
+    (key: string, values: Set<string>) => {
+      const params = new URLSearchParams(searchParams.toString());
+      params.delete(key);
+      values.forEach((v) => params.append(key, v));
+      params.set("page", "1");
+      router.push(`${pathname}?${params.toString()}`, { scroll: false });
+    },
+    [router, pathname, searchParams]
+  );
+
+  const updateSearch = (value: string) => {
+    setSearchValue(value);
+    const params = new URLSearchParams(searchParams.toString());
+    if (value) {
+      params.set("search", value);
+      params.set("page", "1");
+    } else {
+      params.delete("search");
+    }
+    router.push(`${pathname}?${params.toString()}`, { scroll: false });
+  };
+
+  const columns = getResinColumns({
+    onEdit: (resin) => {
+      setEditResin(resin);
+      setModalOpen(true);
+    },
+    onArchive: (id) => {
+      startTransition(async () => {
+        const result = await archiveResin(id);
+        if (result.success) toast.success("Resin updated");
+        else toast.error(result.error);
+      });
+    },
+    onDelete: (id) => setDeleteId(id),
+    onLogUsage: (resin) => setUsageResin(resin),
+    lowStockThreshold,
+  });
+
+  const { table } = useDataTable({ data, columns, pageCount });
+
+  const handleDelete = () => {
+    if (!deleteId) return;
+    startTransition(async () => {
+      const result = await deleteResin(deleteId);
+      if (result.success) {
+        toast.success("Resin deleted");
+        setDeleteId(null);
+      } else {
+        toast.error(result.error);
+      }
+    });
+  };
+
+  const resinTypeOptions = RESIN_TYPES.map((t) => ({ label: t, value: t }));
+  const vendorOptions = vendors.map((v) => ({ label: v.name, value: v.id }));
+  const locationOptions = locations.map((l) => ({ label: l.name, value: l.id }));
+
+  return (
+    <div className="space-y-4">
+      <PageHeader title="Resins" description="Manage your SLA resin inventory">
+        <Button
+          onClick={() => {
+            setEditResin(undefined);
+            setModalOpen(true);
+          }}
+        >
+          <Plus className="mr-2 h-4 w-4" />
+          Add Resin
+        </Button>
+      </PageHeader>
+
+      <div className="flex flex-wrap items-center gap-2">
+        <div className="relative flex-1 min-w-[200px] max-w-sm">
+          <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+          <Input
+            placeholder="Search resins..."
+            value={searchValue}
+            onChange={(e) => updateSearch(e.target.value)}
+            className="pl-9 h-9"
+          />
+        </div>
+        <DataTableFacetedFilter
+          title="Type"
+          options={resinTypeOptions}
+          selectedValues={resinTypeFilter}
+          onSelectionChange={(values) => updateFilters("resinType", values)}
+        />
+        <DataTableFacetedFilter
+          title="Vendor"
+          options={vendorOptions}
+          selectedValues={vendorFilter}
+          onSelectionChange={(values) => updateFilters("vendor", values)}
+        />
+        <DataTableFacetedFilter
+          title="Location"
+          options={locationOptions}
+          selectedValues={locationFilter}
+          onSelectionChange={(values) => updateFilters("location", values)}
+        />
+        <DataTableViewOptions table={table} />
+      </div>
+
+      <DataTable table={table} emptyMessage="No resins found. Add your first bottle!" />
+      <DataTablePagination table={table} totalCount={totalCount} />
+
+      <ResinModal
+        open={modalOpen}
+        onOpenChange={(open) => {
+          setModalOpen(open);
+          if (!open) setEditResin(undefined);
+        }}
+        resin={
+          editResin
+            ? {
+                id: editResin.id,
+                name: editResin.name,
+                brand: editResin.brand,
+                resinType: editResin.resinType,
+                color: editResin.color,
+                colorHex: editResin.colorHex,
+                bottleSize: editResin.bottleSize,
+                usedML: editResin.usedML,
+                cost: editResin.cost,
+                purchaseDate: editResin.purchaseDate,
+                notes: editResin.notes,
+                vendorId: editResin.vendor?.id ?? null,
+                locationId: editResin.location?.id ?? null,
+              }
+            : undefined
+        }
+        vendors={vendors}
+        locations={locations}
+      />
+
+      <DeleteDialog
+        open={!!deleteId}
+        onOpenChange={(open) => !open && setDeleteId(null)}
+        title="Delete Resin"
+        description="This will permanently delete this resin bottle and all its usage logs."
+        onConfirm={handleDelete}
+        isLoading={isPending}
+      />
+
+      {usageResin && (
+        <UsageLogDialog
+          open={!!usageResin}
+          onOpenChange={(open) => !open && setUsageResin(null)}
+          itemName={usageResin.name}
+          unit="ml"
+          onSubmit={async (amount, notes) => {
+            const result = await logResinUsage(usageResin.id, { amount, notes });
+            return result;
+          }}
+        />
+      )}
+    </div>
+  );
+}

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

@@ -0,0 +1,153 @@
+"use server";
+
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { resinSchema } from "@/schemas/resin.schema";
+import { usageLogSchema } from "@/schemas/usage-log.schema";
+import { revalidatePath } from "next/cache";
+import type { ActionResult } from "@/types/api.types";
+
+export async function createResin(input: unknown): Promise<ActionResult<{ id: string }>> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = resinSchema.safeParse(input);
+  if (!parsed.success) return { success: false, error: "Validation failed" };
+
+  try {
+    const resin = await prisma.resin.create({
+      data: {
+        name: parsed.data.name,
+        brand: parsed.data.brand,
+        resinType: parsed.data.resinType,
+        color: parsed.data.color,
+        colorHex: parsed.data.colorHex,
+        bottleSize: parsed.data.bottleSize,
+        usedML: parsed.data.usedML,
+        purchaseDate: parsed.data.purchaseDate ? new Date(parsed.data.purchaseDate) : null,
+        cost: parsed.data.cost ?? null,
+        notes: parsed.data.notes || null,
+        vendorId: parsed.data.vendorId || null,
+        locationId: parsed.data.locationId || null,
+        userId: session.user.id,
+      },
+    });
+
+    revalidatePath("/resins");
+    revalidatePath("/dashboard");
+    return { success: true, data: { id: resin.id } };
+  } catch {
+    return { success: false, error: "Failed to create resin" };
+  }
+}
+
+export async function updateResin(id: string, input: unknown): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = resinSchema.safeParse(input);
+  if (!parsed.success) return { success: false, error: "Validation failed" };
+
+  const existing = await prisma.resin.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.resin.update({
+      where: { id },
+      data: {
+        name: parsed.data.name,
+        brand: parsed.data.brand,
+        resinType: parsed.data.resinType,
+        color: parsed.data.color,
+        colorHex: parsed.data.colorHex,
+        bottleSize: parsed.data.bottleSize,
+        usedML: parsed.data.usedML,
+        purchaseDate: parsed.data.purchaseDate ? new Date(parsed.data.purchaseDate) : null,
+        cost: parsed.data.cost ?? null,
+        notes: parsed.data.notes || null,
+        vendorId: parsed.data.vendorId || null,
+        locationId: parsed.data.locationId || null,
+      },
+    });
+
+    revalidatePath("/resins");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to update resin" };
+  }
+}
+
+export async function deleteResin(id: string): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const existing = await prisma.resin.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.resin.delete({ where: { id } });
+    revalidatePath("/resins");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to delete resin" };
+  }
+}
+
+export async function archiveResin(id: string): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const existing = await prisma.resin.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.resin.update({
+      where: { id },
+      data: { archived: !existing.archived },
+    });
+    revalidatePath("/resins");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to archive resin" };
+  }
+}
+
+export async function logResinUsage(resinId: string, input: unknown): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = usageLogSchema.safeParse(input);
+  if (!parsed.success) return { success: false, error: "Validation failed" };
+
+  const existing = await prisma.resin.findFirst({ where: { id: resinId, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.$transaction([
+      prisma.usageLog.create({
+        data: {
+          itemType: "RESIN",
+          itemId: resinId,
+          resinId,
+          amount: parsed.data.amount,
+          unit: "ml",
+          notes: parsed.data.notes || null,
+          userId: session.user.id,
+        },
+      }),
+      prisma.resin.update({
+        where: { id: resinId },
+        data: { usedML: { increment: parsed.data.amount } },
+      }),
+    ]);
+
+    revalidatePath("/resins");
+    revalidatePath("/dashboard");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to log usage" };
+  }
+}

src/app/(app)/resins/loading.tsx

@@ -0,0 +1,34 @@
+import { Skeleton } from "@/components/ui/skeleton";
+
+export default function ResinsLoading() {
+  return (
+    <div className="space-y-4">
+      <div className="flex items-center justify-between">
+        <div>
+          <Skeleton className="h-8 w-32" />
+          <Skeleton className="mt-1 h-4 w-56" />
+        </div>
+        <Skeleton className="h-9 w-28" />
+      </div>
+      <div className="flex flex-wrap items-center gap-2">
+        <Skeleton className="h-9 w-64" />
+        <Skeleton className="h-9 w-24" />
+        <Skeleton className="h-9 w-24" />
+        <Skeleton className="h-9 w-24" />
+      </div>
+      <div className="rounded-md border">
+        <div className="h-10 border-b bg-muted/50" />
+        {Array.from({ length: 5 }).map((_, i) => (
+          <div key={i} className="flex items-center gap-4 border-b px-4 py-2">
+            <Skeleton className="h-5 w-5 rounded" />
+            <Skeleton className="h-4 w-32" />
+            <Skeleton className="h-4 w-20" />
+            <Skeleton className="h-4 w-20" />
+            <Skeleton className="h-4 w-24" />
+            <Skeleton className="h-4 w-16" />
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}

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

@@ -0,0 +1,44 @@
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { getResins } from "@/data/resin.queries";
+import { getVendorOptions } from "@/data/vendor.queries";
+import { getLocationOptions } from "@/data/location.queries";
+import { getUserSettings } from "@/data/settings.queries";
+import { ResinTable } from "./_components/resin-table";
+
+interface ResinsPageProps {
+  searchParams: Promise<Record<string, string | string[] | undefined>>;
+}
+
+export default async function ResinsPage({ searchParams }: ResinsPageProps) {
+  const session = await auth();
+  if (!session?.user?.id) redirect("/login");
+
+  const params = await searchParams;
+  const [resinsResult, vendors, locations, settings] = await Promise.all([
+    getResins(session.user.id, {
+      page: typeof params.page === "string" ? params.page : "1",
+      perPage: typeof params.perPage === "string" ? params.perPage : "20",
+      sort: typeof params.sort === "string" ? params.sort : undefined,
+      order: typeof params.order === "string" ? (params.order as "asc" | "desc") : undefined,
+      search: typeof params.search === "string" ? params.search : undefined,
+      resinType: params.resinType,
+      vendor: params.vendor,
+      location: params.location,
+    }),
+    getVendorOptions(session.user.id),
+    getLocationOptions(session.user.id),
+    getUserSettings(session.user.id),
+  ]);
+
+  return (
+    <ResinTable
+      data={JSON.parse(JSON.stringify(resinsResult.data))}
+      pageCount={resinsResult.pageCount}
+      totalCount={resinsResult.totalCount}
+      vendors={vendors}
+      locations={locations}
+      lowStockThreshold={settings.lowStockThreshold}
+    />
+  );
+}

src/app/(app)/settings/_components/settings-form.tsx

@@ -0,0 +1,205 @@
+"use client";
+
+import { useTransition } from "react";
+import { useForm } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { toast } from "sonner";
+import { useTheme } from "next-themes";
+import { settingsSchema, type SettingsInput } from "@/schemas/settings.schema";
+import { CURRENCIES, UNITS } from "@/lib/constants";
+import { updateSettings } from "../actions";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import {
+  Form,
+  FormControl,
+  FormDescription,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from "@/components/ui/card";
+import { Separator } from "@/components/ui/separator";
+
+interface SettingsFormProps {
+  settings: {
+    lowStockThreshold: number;
+    currency: string;
+    theme: string;
+    units: string;
+  };
+}
+
+export function SettingsForm({ settings }: SettingsFormProps) {
+  const [isPending, startTransition] = useTransition();
+  const { setTheme } = useTheme();
+
+  const form = useForm<SettingsInput>({
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    resolver: zodResolver(settingsSchema) as any,
+    defaultValues: {
+      lowStockThreshold: settings.lowStockThreshold,
+      currency: settings.currency as SettingsInput["currency"],
+      theme: settings.theme as SettingsInput["theme"],
+      units: settings.units as SettingsInput["units"],
+    },
+  });
+
+  function onSubmit(values: SettingsInput) {
+    startTransition(async () => {
+      const result = await updateSettings(values);
+      if (!result.success) {
+        toast.error(result.error);
+        return;
+      }
+      setTheme(values.theme);
+      toast.success("Settings updated");
+    });
+  }
+
+  return (
+    <Form {...form}>
+      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-6">
+        <Card>
+          <CardHeader>
+            <CardTitle>Inventory Settings</CardTitle>
+            <CardDescription>
+              Configure stock thresholds and display preferences.
+            </CardDescription>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            <FormField
+              control={form.control}
+              name="lowStockThreshold"
+              render={({ field }) => (
+                <FormItem>
+                  <FormLabel>Low Stock Threshold (%)</FormLabel>
+                  <FormControl>
+                    <Input type="number" min="0" max="100" step="1" {...field} />
+                  </FormControl>
+                  <FormDescription>
+                    Items with remaining stock below this percentage will be flagged as
+                    low stock.
+                  </FormDescription>
+                  <FormMessage />
+                </FormItem>
+              )}
+            />
+
+            <FormField
+              control={form.control}
+              name="currency"
+              render={({ field }) => (
+                <FormItem>
+                  <FormLabel>Currency</FormLabel>
+                  <Select onValueChange={field.onChange} value={field.value}>
+                    <FormControl>
+                      <SelectTrigger>
+                        <SelectValue />
+                      </SelectTrigger>
+                    </FormControl>
+                    <SelectContent>
+                      {CURRENCIES.map((c) => (
+                        <SelectItem key={c} value={c}>
+                          {c}
+                        </SelectItem>
+                      ))}
+                    </SelectContent>
+                  </Select>
+                  <FormDescription>
+                    Display currency for cost values.
+                  </FormDescription>
+                  <FormMessage />
+                </FormItem>
+              )}
+            />
+
+            <FormField
+              control={form.control}
+              name="units"
+              render={({ field }) => (
+                <FormItem>
+                  <FormLabel>Unit System</FormLabel>
+                  <Select onValueChange={field.onChange} value={field.value}>
+                    <FormControl>
+                      <SelectTrigger>
+                        <SelectValue />
+                      </SelectTrigger>
+                    </FormControl>
+                    <SelectContent>
+                      {UNITS.map((u) => (
+                        <SelectItem key={u} value={u}>
+                          {u.charAt(0).toUpperCase() + u.slice(1)}
+                        </SelectItem>
+                      ))}
+                    </SelectContent>
+                  </Select>
+                  <FormDescription>
+                    Measurement system for weight and volume.
+                  </FormDescription>
+                  <FormMessage />
+                </FormItem>
+              )}
+            />
+          </CardContent>
+        </Card>
+
+        <Separator />
+
+        <Card>
+          <CardHeader>
+            <CardTitle>Appearance</CardTitle>
+            <CardDescription>Customize the look and feel.</CardDescription>
+          </CardHeader>
+          <CardContent>
+            <FormField
+              control={form.control}
+              name="theme"
+              render={({ field }) => (
+                <FormItem>
+                  <FormLabel>Theme</FormLabel>
+                  <Select onValueChange={field.onChange} value={field.value}>
+                    <FormControl>
+                      <SelectTrigger>
+                        <SelectValue />
+                      </SelectTrigger>
+                    </FormControl>
+                    <SelectContent>
+                      <SelectItem value="dark">Dark</SelectItem>
+                      <SelectItem value="light">Light</SelectItem>
+                      <SelectItem value="system">System</SelectItem>
+                    </SelectContent>
+                  </Select>
+                  <FormDescription>
+                    Choose your preferred color theme.
+                  </FormDescription>
+                  <FormMessage />
+                </FormItem>
+              )}
+            />
+          </CardContent>
+        </Card>
+
+        <div className="flex justify-end">
+          <Button type="submit" disabled={isPending}>
+            {isPending ? "Saving..." : "Save Settings"}
+          </Button>
+        </div>
+      </form>
+    </Form>
+  );
+}

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

@@ -0,0 +1,43 @@
+"use server";
+
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { settingsSchema } from "@/schemas/settings.schema";
+import { revalidatePath } from "next/cache";
+import type { ActionResult } from "@/types/api.types";
+
+export async function updateSettings(input: unknown): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = settingsSchema.safeParse(input);
+  if (!parsed.success) return { success: false, error: "Validation failed" };
+
+  try {
+    await prisma.userSettings.upsert({
+      where: { userId: session.user.id },
+      update: {
+        lowStockThreshold: parsed.data.lowStockThreshold,
+        currency: parsed.data.currency,
+        theme: parsed.data.theme,
+        units: parsed.data.units,
+      },
+      create: {
+        userId: session.user.id,
+        lowStockThreshold: parsed.data.lowStockThreshold,
+        currency: parsed.data.currency,
+        theme: parsed.data.theme,
+        units: parsed.data.units,
+      },
+    });
+
+    revalidatePath("/settings");
+    revalidatePath("/dashboard");
+    revalidatePath("/filaments");
+    revalidatePath("/resins");
+    revalidatePath("/paints");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to update settings" };
+  }
+}

src/app/(app)/settings/loading.tsx

@@ -0,0 +1,24 @@
+import { Skeleton } from "@/components/ui/skeleton";
+
+export default function SettingsLoading() {
+  return (
+    <div className="space-y-6">
+      <div>
+        <Skeleton className="h-8 w-32" />
+        <Skeleton className="mt-1 h-4 w-64" />
+      </div>
+      <div className="max-w-2xl space-y-6">
+        <div className="rounded-lg border p-6 space-y-4">
+          <Skeleton className="h-6 w-40" />
+          <div className="space-y-3">
+            <Skeleton className="h-9 w-full" />
+            <Skeleton className="h-9 w-full" />
+            <Skeleton className="h-9 w-full" />
+            <Skeleton className="h-9 w-full" />
+          </div>
+          <Skeleton className="h-9 w-24" />
+        </div>
+      </div>
+    </div>
+  );
+}

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

@@ -0,0 +1,26 @@
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { getUserSettings } from "@/data/settings.queries";
+import { PageHeader } from "@/components/shared/page-header";
+import { SettingsForm } from "./_components/settings-form";
+
+export default async function SettingsPage() {
+  const session = await auth();
+  if (!session?.user?.id) redirect("/login");
+
+  const settings = await getUserSettings(session.user.id);
+
+  return (
+    <div className="space-y-6">
+      <PageHeader
+        title="Settings"
+        description="Manage your application preferences"
+      />
+      <div className="max-w-2xl">
+        <SettingsForm
+          settings={JSON.parse(JSON.stringify(settings))}
+        />
+      </div>
+    </div>
+  );
+}

src/app/(app)/vendors/_components/vendor-columns.tsx

@@ -0,0 +1,120 @@
+"use client";
+
+import { type ColumnDef } from "@tanstack/react-table";
+import { MoreHorizontal, Pencil, Archive, Trash2, ExternalLink } from "lucide-react";
+import { DataTableColumnHeader } from "@/components/shared/data-table-column-header";
+import { StatusBadge } from "@/components/shared/status-badge";
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+
+interface VendorRow {
+  id: string;
+  name: string;
+  website: string | null;
+  notes: string | null;
+  archived: boolean;
+  createdAt: Date;
+  _count: { filaments: number; resins: number; paints: number };
+}
+
+interface VendorColumnsProps {
+  onEdit: (vendor: VendorRow) => void;
+  onArchive: (id: string) => void;
+  onDelete: (id: string) => void;
+}
+
+export function getVendorColumns({
+  onEdit,
+  onArchive,
+  onDelete,
+}: VendorColumnsProps): ColumnDef<VendorRow, unknown>[] {
+  return [
+    {
+      accessorKey: "name",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Name" />,
+      cell: ({ row }) => (
+        <div className="flex items-center gap-2">
+          <span className="font-medium">{row.original.name}</span>
+          {row.original.archived && <StatusBadge variant="archived" />}
+        </div>
+      ),
+      enableHiding: false,
+    },
+    {
+      accessorKey: "website",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Website" />,
+      cell: ({ row }) =>
+        row.original.website ? (
+          <a
+            href={row.original.website}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="flex items-center gap-1 text-sm text-primary hover:underline"
+          >
+            {new URL(row.original.website).hostname}
+            <ExternalLink className="h-3 w-3" />
+          </a>
+        ) : (
+          <span className="text-muted-foreground">—</span>
+        ),
+    },
+    {
+      id: "items",
+      header: "Items",
+      cell: ({ row }) => {
+        const c = row.original._count;
+        return (
+          <span className="text-sm text-muted-foreground">
+            {c.filaments + c.resins + c.paints}
+          </span>
+        );
+      },
+    },
+    {
+      accessorKey: "createdAt",
+      header: ({ column }) => <DataTableColumnHeader column={column} title="Created" />,
+      cell: ({ row }) => (
+        <span className="text-sm text-muted-foreground">
+          {new Date(row.original.createdAt).toLocaleDateString()}
+        </span>
+      ),
+    },
+    {
+      id: "actions",
+      cell: ({ row }) => (
+        <DropdownMenu>
+          <DropdownMenuTrigger asChild>
+            <Button variant="ghost" size="icon" className="h-8 w-8">
+              <MoreHorizontal className="h-4 w-4" />
+            </Button>
+          </DropdownMenuTrigger>
+          <DropdownMenuContent align="end">
+            <DropdownMenuItem onClick={() => onEdit(row.original)}>
+              <Pencil className="mr-2 h-3.5 w-3.5" />
+              Edit
+            </DropdownMenuItem>
+            <DropdownMenuItem onClick={() => onArchive(row.original.id)}>
+              <Archive className="mr-2 h-3.5 w-3.5" />
+              {row.original.archived ? "Unarchive" : "Archive"}
+            </DropdownMenuItem>
+            <DropdownMenuSeparator />
+            <DropdownMenuItem
+              onClick={() => onDelete(row.original.id)}
+              className="text-destructive focus:text-destructive"
+            >
+              <Trash2 className="mr-2 h-3.5 w-3.5" />
+              Delete
+            </DropdownMenuItem>
+          </DropdownMenuContent>
+        </DropdownMenu>
+      ),
+      enableHiding: false,
+    },
+  ];
+}

src/app/(app)/vendors/_components/vendor-form.tsx

@@ -0,0 +1,109 @@
+"use client";
+
+import { useTransition } from "react";
+import { useForm } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { toast } from "sonner";
+import { vendorSchema, type VendorInput } from "@/schemas/vendor.schema";
+import { createVendor, updateVendor } from "../actions";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Textarea } from "@/components/ui/textarea";
+import {
+  Form,
+  FormControl,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
+
+interface VendorFormProps {
+  vendor?: { id: string; name: string; website: string | null; notes: string | null };
+  onSuccess: () => void;
+}
+
+export function VendorForm({ vendor, onSuccess }: VendorFormProps) {
+  const [isPending, startTransition] = useTransition();
+  const isEditing = !!vendor;
+
+  const form = useForm<VendorInput>({
+    resolver: zodResolver(vendorSchema),
+    defaultValues: {
+      name: vendor?.name ?? "",
+      website: vendor?.website ?? "",
+      notes: vendor?.notes ?? "",
+    },
+  });
+
+  function onSubmit(values: VendorInput) {
+    startTransition(async () => {
+      const result = isEditing
+        ? await updateVendor(vendor!.id, values)
+        : await createVendor(values);
+
+      if (!result.success) {
+        toast.error(result.error);
+        return;
+      }
+
+      toast.success(isEditing ? "Vendor updated" : "Vendor created");
+      form.reset();
+      onSuccess();
+    });
+  }
+
+  return (
+    <Form {...form}>
+      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
+        <FormField
+          control={form.control}
+          name="name"
+          render={({ field }) => (
+            <FormItem>
+              <FormLabel>Name</FormLabel>
+              <FormControl>
+                <Input placeholder="Vendor name" {...field} />
+              </FormControl>
+              <FormMessage />
+            </FormItem>
+          )}
+        />
+
+        <FormField
+          control={form.control}
+          name="website"
+          render={({ field }) => (
+            <FormItem>
+              <FormLabel>Website</FormLabel>
+              <FormControl>
+                <Input placeholder="https://example.com" {...field} />
+              </FormControl>
+              <FormMessage />
+            </FormItem>
+          )}
+        />
+
+        <FormField
+          control={form.control}
+          name="notes"
+          render={({ field }) => (
+            <FormItem>
+              <FormLabel>Notes</FormLabel>
+              <FormControl>
+                <Textarea placeholder="Optional notes" rows={3} {...field} />
+              </FormControl>
+              <FormMessage />
+            </FormItem>
+          )}
+        />
+
+        <div className="flex justify-end gap-2">
+          <Button type="submit" disabled={isPending}>
+            {isPending ? "Saving..." : isEditing ? "Update" : "Create"}
+          </Button>
+        </div>
+      </form>
+    </Form>
+  );
+}

src/app/(app)/vendors/_components/vendor-modal.tsx

@@ -0,0 +1,32 @@
+"use client";
+
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { VendorForm } from "./vendor-form";
+
+interface VendorModalProps {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  vendor?: { id: string; name: string; website: string | null; notes: string | null };
+}
+
+export function VendorModal({ open, onOpenChange, vendor }: VendorModalProps) {
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent className="sm:max-w-md">
+        <DialogHeader>
+          <DialogTitle>{vendor ? "Edit Vendor" : "Add Vendor"}</DialogTitle>
+          <DialogDescription>
+            {vendor ? "Update the vendor details below." : "Add a new vendor to your inventory."}
+          </DialogDescription>
+        </DialogHeader>
+        <VendorForm vendor={vendor} onSuccess={() => onOpenChange(false)} />
+      </DialogContent>
+    </Dialog>
+  );
+}

src/app/(app)/vendors/_components/vendor-table.tsx

@@ -0,0 +1,139 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { useRouter, usePathname, useSearchParams } from "next/navigation";
+import { Plus, Search } from "lucide-react";
+import { toast } from "sonner";
+import { useDataTable } from "@/hooks/use-data-table";
+import { useDebounce } from "@/hooks/use-debounce";
+import { getVendorColumns } from "./vendor-columns";
+import { VendorModal } from "./vendor-modal";
+import { deleteVendor, archiveVendor } 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";
+import { DeleteDialog } from "@/components/shared/delete-dialog";
+import { PageHeader } from "@/components/shared/page-header";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+
+interface VendorRow {
+  id: string;
+  name: string;
+  website: string | null;
+  notes: string | null;
+  archived: boolean;
+  createdAt: Date;
+  _count: { filaments: number; resins: number; paints: number };
+}
+
+interface VendorTableProps {
+  data: VendorRow[];
+  pageCount: number;
+  totalCount: number;
+}
+
+export function VendorTable({ data, pageCount, totalCount }: VendorTableProps) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const searchParams = useSearchParams();
+  const [isPending, startTransition] = useTransition();
+
+  const [modalOpen, setModalOpen] = useState(false);
+  const [editVendor, setEditVendor] = useState<VendorRow | undefined>();
+  const [deleteId, setDeleteId] = useState<string | null>(null);
+
+  const [searchValue, setSearchValue] = useState(searchParams.get("search") ?? "");
+  const debouncedSearch = useDebounce(searchValue, 300);
+
+  // Update URL when search changes
+  const updateSearch = (value: string) => {
+    setSearchValue(value);
+    const params = new URLSearchParams(searchParams.toString());
+    if (value) {
+      params.set("search", value);
+      params.set("page", "1");
+    } else {
+      params.delete("search");
+    }
+    router.push(`${pathname}?${params.toString()}`, { scroll: false });
+  };
+
+  const columns = getVendorColumns({
+    onEdit: (vendor) => {
+      setEditVendor(vendor);
+      setModalOpen(true);
+    },
+    onArchive: (id) => {
+      startTransition(async () => {
+        const result = await archiveVendor(id);
+        if (result.success) {
+          toast.success("Vendor updated");
+        } else {
+          toast.error(result.error);
+        }
+      });
+    },
+    onDelete: (id) => setDeleteId(id),
+  });
+
+  const { table } = useDataTable({ data, columns, pageCount });
+
+  const handleDelete = () => {
+    if (!deleteId) return;
+    startTransition(async () => {
+      const result = await deleteVendor(deleteId);
+      if (result.success) {
+        toast.success("Vendor deleted");
+        setDeleteId(null);
+      } else {
+        toast.error(result.error);
+      }
+    });
+  };
+
+  return (
+    <div className="space-y-4">
+      <PageHeader title="Vendors" description="Manage your inventory vendors">
+        <Button onClick={() => { setEditVendor(undefined); setModalOpen(true); }}>
+          <Plus className="mr-2 h-4 w-4" />
+          Add Vendor
+        </Button>
+      </PageHeader>
+
+      <div className="flex items-center gap-2">
+        <div className="relative flex-1 max-w-sm">
+          <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
+          <Input
+            placeholder="Search vendors..."
+            value={searchValue}
+            onChange={(e) => updateSearch(e.target.value)}
+            className="pl-9 h-9"
+          />
+        </div>
+        <DataTableViewOptions table={table} />
+      </div>
+
+      <DataTable table={table} emptyMessage="No vendors found. Add your first vendor!" />
+      <DataTablePagination table={table} totalCount={totalCount} />
+
+      <VendorModal
+        open={modalOpen}
+        onOpenChange={(open) => {
+          setModalOpen(open);
+          if (!open) setEditVendor(undefined);
+        }}
+        vendor={editVendor}
+      />
+
+      <DeleteDialog
+        open={!!deleteId}
+        onOpenChange={(open) => !open && setDeleteId(null)}
+        title="Delete Vendor"
+        description="This will permanently delete this vendor. Items linked to this vendor will be unlinked."
+        onConfirm={handleDelete}
+        isLoading={isPending}
+      />
+    </div>
+  );
+}

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

@@ -0,0 +1,97 @@
+"use server";
+
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { vendorSchema } from "@/schemas/vendor.schema";
+import { revalidatePath } from "next/cache";
+import type { ActionResult } from "@/types/api.types";
+
+export async function createVendor(input: unknown): Promise<ActionResult<{ id: string }>> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = vendorSchema.safeParse(input);
+  if (!parsed.success) {
+    return { success: false, error: "Validation failed" };
+  }
+
+  try {
+    const vendor = await prisma.vendor.create({
+      data: {
+        ...parsed.data,
+        website: parsed.data.website || null,
+        notes: parsed.data.notes || null,
+        userId: session.user.id,
+      },
+    });
+
+    revalidatePath("/vendors");
+    return { success: true, data: { id: vendor.id } };
+  } catch {
+    return { success: false, error: "Failed to create vendor" };
+  }
+}
+
+export async function updateVendor(id: string, input: unknown): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const parsed = vendorSchema.safeParse(input);
+  if (!parsed.success) {
+    return { success: false, error: "Validation failed" };
+  }
+
+  const existing = await prisma.vendor.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.vendor.update({
+      where: { id },
+      data: {
+        ...parsed.data,
+        website: parsed.data.website || null,
+        notes: parsed.data.notes || null,
+      },
+    });
+
+    revalidatePath("/vendors");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to update vendor" };
+  }
+}
+
+export async function deleteVendor(id: string): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const existing = await prisma.vendor.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.vendor.delete({ where: { id } });
+    revalidatePath("/vendors");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to delete vendor" };
+  }
+}
+
+export async function archiveVendor(id: string): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user?.id) return { success: false, error: "Unauthorized" };
+
+  const existing = await prisma.vendor.findFirst({ where: { id, userId: session.user.id } });
+  if (!existing) return { success: false, error: "Not found" };
+
+  try {
+    await prisma.vendor.update({
+      where: { id },
+      data: { archived: !existing.archived },
+    });
+    revalidatePath("/vendors");
+    return { success: true, data: undefined };
+  } catch {
+    return { success: false, error: "Failed to archive vendor" };
+  }
+}

src/app/(app)/vendors/loading.tsx

@@ -0,0 +1,18 @@
+import { Skeleton } from "@/components/ui/skeleton";
+
+export default function VendorsLoading() {
+  return (
+    <div className="space-y-4">
+      <div className="flex items-center justify-between">
+        <Skeleton className="h-8 w-40" />
+        <Skeleton className="h-9 w-28" />
+      </div>
+      <Skeleton className="h-10 w-full" />
+      <div className="space-y-2">
+        {Array.from({ length: 5 }).map((_, i) => (
+          <Skeleton key={i} className="h-10 w-full" />
+        ))}
+      </div>
+    </div>
+  );
+}

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

@@ -0,0 +1,19 @@
+import { auth } from "@/lib/auth";
+import { redirect } from "next/navigation";
+import { getVendors } from "@/data/vendor.queries";
+import type { DataTableSearchParams } from "@/types/table.types";
+import { VendorTable } from "./_components/vendor-table";
+
+interface Props {
+  searchParams: Promise<DataTableSearchParams>;
+}
+
+export default async function VendorsPage({ searchParams }: Props) {
+  const session = await auth();
+  if (!session?.user?.id) redirect("/login");
+
+  const params = await searchParams;
+  const { data, pageCount, totalCount } = await getVendors(session.user.id, params);
+
+  return <VendorTable data={data} pageCount={pageCount} totalCount={totalCount} />;
+}

src/app/(auth)/layout.tsx

@@ -0,0 +1,7 @@
+export default function AuthLayout({ children }: { children: React.ReactNode }) {
+  return (
+    <div className="flex min-h-screen items-center justify-center bg-background">
+      <div className="w-full max-w-md space-y-6 px-4">{children}</div>
+    </div>
+  );
+}

src/app/(auth)/login/actions.ts

@@ -0,0 +1,32 @@
+"use server";
+
+import { signIn } from "@/lib/auth";
+import { loginSchema } from "@/schemas/auth.schema";
+import { AuthError } from "next-auth";
+
+export async function loginAction(values: { email: string; password: string }) {
+  const parsed = loginSchema.safeParse(values);
+  if (!parsed.success) {
+    return { error: "Invalid email or password" };
+  }
+
+  try {
+    await signIn("credentials", {
+      email: parsed.data.email,
+      password: parsed.data.password,
+      redirect: false,
+    });
+    return { success: true };
+  } catch (error) {
+    if (error instanceof AuthError) {
+      switch (error.type) {
+        case "CredentialsSignin":
+          return { error: "Invalid email or password" };
+        default:
+          return { error: "Something went wrong" };
+      }
+    }
+    // This is a redirect error thrown by next-auth on success - rethrow it
+    throw error;
+  }
+}

src/app/(auth)/login/page.tsx

@@ -0,0 +1,133 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { useRouter, useSearchParams } from "next/navigation";
+import Link from "next/link";
+import { useForm } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { Flame } from "lucide-react";
+import { loginSchema, type LoginInput } from "@/schemas/auth.schema";
+import { loginAction } from "./actions";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import {
+  Form,
+  FormControl,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
+import { APP_NAME } from "@/lib/constants";
+
+export default function LoginPage() {
+  const router = useRouter();
+  const searchParams = useSearchParams();
+  const callbackUrl = searchParams.get("callbackUrl") || "/dashboard";
+  const [error, setError] = useState<string | null>(null);
+  const [isPending, startTransition] = useTransition();
+
+  const form = useForm<LoginInput>({
+    resolver: zodResolver(loginSchema) as any,
+    defaultValues: { email: "", password: "" },
+  });
+
+  function onSubmit(values: LoginInput) {
+    setError(null);
+    startTransition(async () => {
+      try {
+        const result = await loginAction(values);
+
+        if (result?.error) {
+          setError(result.error);
+          return;
+        }
+
+        router.push(callbackUrl);
+        router.refresh();
+      } catch {
+        // Redirect from server action — Next.js handles this automatically
+        router.push(callbackUrl);
+        router.refresh();
+      }
+    });
+  }
+
+  return (
+    <>
+      <div className="flex flex-col items-center gap-2 text-center">
+        <Flame className="h-10 w-10 text-primary" />
+        <h1 className="text-2xl font-bold tracking-tight">{APP_NAME}</h1>
+        <p className="text-sm text-muted-foreground">Sign in to manage your inventory</p>
+      </div>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>Sign In</CardTitle>
+          <CardDescription>Enter your credentials to continue</CardDescription>
+        </CardHeader>
+        <CardContent>
+          <Form {...form}>
+            <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
+              {error && (
+                <div className="rounded-md bg-destructive/10 p-3 text-sm text-destructive">
+                  {error}
+                </div>
+              )}
+
+              <FormField
+                control={form.control}
+                name="email"
+                render={({ field }) => (
+                  <FormItem>
+                    <FormLabel>Email</FormLabel>
+                    <FormControl>
+                      <Input
+                        type="email"
+                        placeholder="admin@dragonsstash.local"
+                        autoComplete="email"
+                        {...field}
+                      />
+                    </FormControl>
+                    <FormMessage />
+                  </FormItem>
+                )}
+              />
+
+              <FormField
+                control={form.control}
+                name="password"
+                render={({ field }) => (
+                  <FormItem>
+                    <FormLabel>Password</FormLabel>
+                    <FormControl>
+                      <Input
+                        type="password"
+                        placeholder="Enter your password"
+                        autoComplete="current-password"
+                        {...field}
+                      />
+                    </FormControl>
+                    <FormMessage />
+                  </FormItem>
+                )}
+              />
+
+              <Button type="submit" className="w-full" disabled={isPending}>
+                {isPending ? "Signing in..." : "Sign In"}
+              </Button>
+            </form>
+          </Form>
+
+          <p className="mt-4 text-center text-sm text-muted-foreground">
+            Don&apos;t have an account?{" "}
+            <Link href="/register" className="text-primary underline-offset-4 hover:underline">
+              Register
+            </Link>
+          </p>
+        </CardContent>
+      </Card>
+    </>
+  );
+}

src/app/(auth)/register/actions.ts

@@ -0,0 +1,42 @@
+"use server";
+
+import bcrypt from "bcryptjs";
+import { prisma } from "@/lib/prisma";
+import { registerSchema } from "@/schemas/auth.schema";
+import type { ActionResult } from "@/types/api.types";
+
+export async function registerUser(input: unknown): Promise<ActionResult<{ id: string }>> {
+  const parsed = registerSchema.safeParse(input);
+  if (!parsed.success) {
+    return { success: false, error: "Validation failed" };
+  }
+
+  const existing = await prisma.user.findUnique({
+    where: { email: parsed.data.email },
+  });
+
+  if (existing) {
+    return { success: false, error: "An account with this email already exists" };
+  }
+
+  const hashedPassword = await bcrypt.hash(parsed.data.password, 10);
+
+  const user = await prisma.user.create({
+    data: {
+      name: parsed.data.name,
+      email: parsed.data.email,
+      hashedPassword,
+      role: "USER",
+      settings: {
+        create: {
+          lowStockThreshold: 10,
+          currency: "USD",
+          theme: "dark",
+          units: "metric",
+        },
+      },
+    },
+  });
+
+  return { success: true, data: { id: user.id } };
+}

src/app/(auth)/register/page.tsx

@@ -0,0 +1,176 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { useRouter } from "next/navigation";
+import Link from "next/link";
+import { useForm } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { Flame } from "lucide-react";
+import { registerSchema, type RegisterInput } from "@/schemas/auth.schema";
+import { registerUser } from "./actions";
+import { loginAction } from "../login/actions";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import {
+  Form,
+  FormControl,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
+import { APP_NAME } from "@/lib/constants";
+
+export default function RegisterPage() {
+  const router = useRouter();
+  const [error, setError] = useState<string | null>(null);
+  const [isPending, startTransition] = useTransition();
+
+  const form = useForm<RegisterInput>({
+    resolver: zodResolver(registerSchema) as any,
+    defaultValues: { name: "", email: "", password: "", confirmPassword: "" },
+  });
+
+  function onSubmit(values: RegisterInput) {
+    setError(null);
+    startTransition(async () => {
+      const result = await registerUser(values);
+
+      if (!result.success) {
+        setError(result.error);
+        return;
+      }
+
+      // Auto-login after registration using server action
+      try {
+        const loginResult = await loginAction({
+          email: values.email,
+          password: values.password,
+        });
+
+        if (loginResult?.error) {
+          setError("Account created but sign in failed. Please try logging in.");
+          return;
+        }
+
+        router.push("/dashboard");
+        router.refresh();
+      } catch {
+        // Redirect from server action
+        router.push("/dashboard");
+        router.refresh();
+      }
+    });
+  }
+
+  return (
+    <>
+      <div className="flex flex-col items-center gap-2 text-center">
+        <Flame className="h-10 w-10 text-primary" />
+        <h1 className="text-2xl font-bold tracking-tight">{APP_NAME}</h1>
+        <p className="text-sm text-muted-foreground">Create an account to get started</p>
+      </div>
+
+      <Card>
+        <CardHeader>
+          <CardTitle>Create Account</CardTitle>
+          <CardDescription>Fill in your details below</CardDescription>
+        </CardHeader>
+        <CardContent>
+          <Form {...form}>
+            <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
+              {error && (
+                <div className="rounded-md bg-destructive/10 p-3 text-sm text-destructive">
+                  {error}
+                </div>
+              )}
+
+              <FormField
+                control={form.control}
+                name="name"
+                render={({ field }) => (
+                  <FormItem>
+                    <FormLabel>Name</FormLabel>
+                    <FormControl>
+                      <Input placeholder="Your name" autoComplete="name" {...field} />
+                    </FormControl>
+                    <FormMessage />
+                  </FormItem>
+                )}
+              />
+
+              <FormField
+                control={form.control}
+                name="email"
+                render={({ field }) => (
+                  <FormItem>
+                    <FormLabel>Email</FormLabel>
+                    <FormControl>
+                      <Input
+                        type="email"
+                        placeholder="you@example.com"
+                        autoComplete="email"
+                        {...field}
+                      />
+                    </FormControl>
+                    <FormMessage />
+                  </FormItem>
+                )}
+              />
+
+              <FormField
+                control={form.control}
+                name="password"
+                render={({ field }) => (
+                  <FormItem>
+                    <FormLabel>Password</FormLabel>
+                    <FormControl>
+                      <Input
+                        type="password"
+                        placeholder="At least 6 characters"
+                        autoComplete="new-password"
+                        {...field}
+                      />
+                    </FormControl>
+                    <FormMessage />
+                  </FormItem>
+                )}
+              />
+
+              <FormField
+                control={form.control}
+                name="confirmPassword"
+                render={({ field }) => (
+                  <FormItem>
+                    <FormLabel>Confirm Password</FormLabel>
+                    <FormControl>
+                      <Input
+                        type="password"
+                        placeholder="Repeat your password"
+                        autoComplete="new-password"
+                        {...field}
+                      />
+                    </FormControl>
+                    <FormMessage />
+                  </FormItem>
+                )}
+              />
+
+              <Button type="submit" className="w-full" disabled={isPending}>
+                {isPending ? "Creating account..." : "Create Account"}
+              </Button>
+            </form>
+          </Form>
+
+          <p className="mt-4 text-center text-sm text-muted-foreground">
+            Already have an account?{" "}
+            <Link href="/login" className="text-primary underline-offset-4 hover:underline">
+              Sign in
+            </Link>
+          </p>
+        </CardContent>
+      </Card>
+    </>
+  );
+}

src/app/api/auth/[...nextauth]/route.ts

@@ -0,0 +1,3 @@
+import { handlers } from "@/lib/auth";
+
+export const { GET, POST } = handlers;

src/app/api/catalog/filaments/route.ts

@@ -0,0 +1,52 @@
+import { NextRequest, NextResponse } from "next/server";
+import type { CatalogBrand, CatalogResponse } from "@/types/catalog.types";
+import { fetchFilaments } from "@/lib/catalog/shopify";
+import { deduplicateItems } from "@/lib/catalog/cache";
+
+export async function GET(req: NextRequest) {
+  const { searchParams } = req.nextUrl;
+  const brandFilter = searchParams.get("brand")?.toLowerCase();
+  const search = searchParams.get("search")?.toLowerCase();
+
+  try {
+    let items = deduplicateItems(await fetchFilaments());
+
+    // Build brand summary from unfiltered data
+    const brandMap = new Map<string, number>();
+    for (const p of items) {
+      brandMap.set(p.brand, (brandMap.get(p.brand) ?? 0) + 1);
+    }
+
+    if (brandFilter) {
+      items = items.filter((p) => p.brand.toLowerCase() === brandFilter);
+    }
+
+    if (search) {
+      items = items.filter(
+        (p) =>
+          p.name.toLowerCase().includes(search) ||
+          p.brand.toLowerCase().includes(search) ||
+          (p.color && p.color.toLowerCase().includes(search)) ||
+          (p.material && p.material.toLowerCase().includes(search)),
+      );
+    }
+
+    const brands: CatalogBrand[] = Array.from(brandMap.entries())
+      .map(([name, count]) => ({
+        id: name.toLowerCase().replace(/[^a-z0-9]/g, "_"),
+        name,
+        type: "filament" as const,
+        itemCount: count,
+      }))
+      .sort((a, b) => a.name.localeCompare(b.name));
+
+    const response: CatalogResponse = { items, brands };
+    return NextResponse.json(response);
+  } catch (error) {
+    console.error("Failed to fetch filament catalog:", error);
+    return NextResponse.json(
+      { items: [], brands: [], error: "Failed to fetch filament data" },
+      { status: 500 },
+    );
+  }
+}

src/app/api/catalog/paints/route.ts

@@ -0,0 +1,47 @@
+import { NextRequest, NextResponse } from "next/server";
+import type { CatalogBrand, CatalogItem, CatalogResponse } from "@/types/catalog.types";
+
+// Static import — bundled at build time from the generated JSON
+import paintsData from "@/data/catalog/paints.json";
+
+const allPaints = paintsData as CatalogItem[];
+
+export async function GET(req: NextRequest) {
+  const { searchParams } = req.nextUrl;
+  const brandFilter = searchParams.get("brand")?.toLowerCase();
+  const search = searchParams.get("search")?.toLowerCase();
+
+  let items = allPaints;
+
+  if (brandFilter) {
+    items = items.filter((p) => p.brand.toLowerCase() === brandFilter);
+  }
+
+  if (search) {
+    items = items.filter(
+      (p) =>
+        p.name.toLowerCase().includes(search) ||
+        p.brand.toLowerCase().includes(search) ||
+        (p.line && p.line.toLowerCase().includes(search)) ||
+        (p.productCode && p.productCode.toLowerCase().includes(search)),
+    );
+  }
+
+  // Build brand summary from the FULL dataset (not filtered)
+  const brandMap = new Map<string, number>();
+  for (const p of allPaints) {
+    brandMap.set(p.brand, (brandMap.get(p.brand) ?? 0) + 1);
+  }
+
+  const brands: CatalogBrand[] = Array.from(brandMap.entries())
+    .map(([name, count]) => ({
+      id: name.toLowerCase().replace(/[^a-z0-9]/g, "_"),
+      name,
+      type: "paint" as const,
+      itemCount: count,
+    }))
+    .sort((a, b) => a.name.localeCompare(b.name));
+
+  const response: CatalogResponse = { items, brands };
+  return NextResponse.json(response);
+}

src/app/api/catalog/resins/route.ts

@@ -0,0 +1,52 @@
+import { NextRequest, NextResponse } from "next/server";
+import type { CatalogBrand, CatalogResponse } from "@/types/catalog.types";
+import { fetchResins } from "@/lib/catalog/shopify";
+import { deduplicateItems } from "@/lib/catalog/cache";
+
+export async function GET(req: NextRequest) {
+  const { searchParams } = req.nextUrl;
+  const brandFilter = searchParams.get("brand")?.toLowerCase();
+  const search = searchParams.get("search")?.toLowerCase();
+
+  try {
+    let items = deduplicateItems(await fetchResins());
+
+    // Build brand summary from unfiltered data
+    const brandMap = new Map<string, number>();
+    for (const p of items) {
+      brandMap.set(p.brand, (brandMap.get(p.brand) ?? 0) + 1);
+    }
+
+    if (brandFilter) {
+      items = items.filter((p) => p.brand.toLowerCase() === brandFilter);
+    }
+
+    if (search) {
+      items = items.filter(
+        (p) =>
+          p.name.toLowerCase().includes(search) ||
+          p.brand.toLowerCase().includes(search) ||
+          (p.color && p.color.toLowerCase().includes(search)) ||
+          (p.resinType && p.resinType.toLowerCase().includes(search)),
+      );
+    }
+
+    const brands: CatalogBrand[] = Array.from(brandMap.entries())
+      .map(([name, count]) => ({
+        id: name.toLowerCase().replace(/[^a-z0-9]/g, "_"),
+        name,
+        type: "resin" as const,
+        itemCount: count,
+      }))
+      .sort((a, b) => a.name.localeCompare(b.name));
+
+    const response: CatalogResponse = { items, brands };
+    return NextResponse.json(response);
+  } catch (error) {
+    console.error("Failed to fetch resin catalog:", error);
+    return NextResponse.json(
+      { items: [], brands: [], error: "Failed to fetch resin data" },
+      { status: 500 },
+    );
+  }
+}

src/app/api/health/route.ts

@@ -0,0 +1,27 @@
+import { prisma } from "@/lib/prisma";
+import { NextResponse } from "next/server";
+
+export const dynamic = "force-dynamic";
+
+export async function GET() {
+  try {
+    await prisma.$queryRaw`SELECT 1`;
+    return NextResponse.json(
+      {
+        status: "healthy",
+        timestamp: new Date().toISOString(),
+        database: "connected",
+      },
+      { status: 200 }
+    );
+  } catch {
+    return NextResponse.json(
+      {
+        status: "unhealthy",
+        timestamp: new Date().toISOString(),
+        database: "disconnected",
+      },
+      { status: 503 }
+    );
+  }
+}

src/app/error.tsx

@@ -0,0 +1,19 @@
+"use client";
+
+import { Button } from "@/components/ui/button";
+
+export default function Error({
+  error,
+  reset,
+}: {
+  error: Error & { digest?: string };
+  reset: () => void;
+}) {
+  return (
+    <div className="flex min-h-screen flex-col items-center justify-center gap-4">
+      <h1 className="text-2xl font-bold">Something went wrong</h1>
+      <p className="text-sm text-muted-foreground">{error.message}</p>
+      <Button onClick={reset}>Try again</Button>
+    </div>
+  );
+}

src/app/globals.css

@@ -0,0 +1,139 @@
+@import "tailwindcss";
+@import "tw-animate-css";
+@import "shadcn/tailwind.css";
+
+@custom-variant dark (&:is(.dark *));
+
+@theme inline {
+  --color-background: var(--background);
+  --color-foreground: var(--foreground);
+  --font-sans: var(--font-geist-sans);
+  --font-mono: var(--font-geist-mono);
+  --color-sidebar-ring: var(--sidebar-ring);
+  --color-sidebar-border: var(--sidebar-border);
+  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
+  --color-sidebar-accent: var(--sidebar-accent);
+  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
+  --color-sidebar-primary: var(--sidebar-primary);
+  --color-sidebar-foreground: var(--sidebar-foreground);
+  --color-sidebar: var(--sidebar);
+  --color-chart-5: var(--chart-5);
+  --color-chart-4: var(--chart-4);
+  --color-chart-3: var(--chart-3);
+  --color-chart-2: var(--chart-2);
+  --color-chart-1: var(--chart-1);
+  --color-ring: var(--ring);
+  --color-input: var(--input);
+  --color-border: var(--border);
+  --color-destructive: var(--destructive);
+  --color-accent-foreground: var(--accent-foreground);
+  --color-accent: var(--accent);
+  --color-muted-foreground: var(--muted-foreground);
+  --color-muted: var(--muted);
+  --color-secondary-foreground: var(--secondary-foreground);
+  --color-secondary: var(--secondary);
+  --color-primary-foreground: var(--primary-foreground);
+  --color-primary: var(--primary);
+  --color-popover-foreground: var(--popover-foreground);
+  --color-popover: var(--popover);
+  --color-card-foreground: var(--card-foreground);
+  --color-card: var(--card);
+  --radius-sm: calc(var(--radius) - 4px);
+  --radius-md: calc(var(--radius) - 2px);
+  --radius-lg: var(--radius);
+  --radius-xl: calc(var(--radius) + 4px);
+  --radius-2xl: calc(var(--radius) + 8px);
+  --radius-3xl: calc(var(--radius) + 12px);
+  --radius-4xl: calc(var(--radius) + 16px);
+}
+
+/* Dragon's Stash Dark Theme (default) */
+:root {
+  --radius: 0.5rem;
+  /* Background: #0f0f12 */
+  --background: oklch(0.13 0.005 285);
+  --foreground: oklch(0.93 0 0);
+  /* Card: #17171c */
+  --card: oklch(0.17 0.005 285);
+  --card-foreground: oklch(0.93 0 0);
+  /* Popover matches card */
+  --popover: oklch(0.17 0.005 285);
+  --popover-foreground: oklch(0.93 0 0);
+  /* Primary: #f97316 (orange) */
+  --primary: oklch(0.702 0.183 54.13);
+  --primary-foreground: oklch(1 0 0);
+  /* Secondary */
+  --secondary: oklch(0.2 0.005 285);
+  --secondary-foreground: oklch(0.93 0 0);
+  /* Muted */
+  --muted: oklch(0.2 0.005 285);
+  --muted-foreground: oklch(0.6 0 0);
+  /* Accent: same as primary (orange) */
+  --accent: oklch(0.702 0.183 54.13);
+  --accent-foreground: oklch(1 0 0);
+  /* Destructive */
+  --destructive: oklch(0.577 0.245 27.325);
+  /* Border: #26262c */
+  --border: oklch(0.23 0.005 285);
+  --input: oklch(0.23 0.005 285);
+  --ring: oklch(0.702 0.183 54.13);
+  /* Charts */
+  --chart-1: oklch(0.702 0.183 54.13);
+  --chart-2: oklch(0.6 0.118 184.704);
+  --chart-3: oklch(0.398 0.07 227.392);
+  --chart-4: oklch(0.828 0.189 84.429);
+  --chart-5: oklch(0.769 0.188 70.08);
+  /* Sidebar */
+  --sidebar: oklch(0.13 0.005 285);
+  --sidebar-foreground: oklch(0.93 0 0);
+  --sidebar-primary: oklch(0.702 0.183 54.13);
+  --sidebar-primary-foreground: oklch(1 0 0);
+  --sidebar-accent: oklch(0.2 0.005 285);
+  --sidebar-accent-foreground: oklch(0.93 0 0);
+  --sidebar-border: oklch(0.23 0.005 285);
+  --sidebar-ring: oklch(0.702 0.183 54.13);
+}
+
+/* Light theme override */
+.light {
+  --background: oklch(0.985 0 0);
+  --foreground: oklch(0.145 0 0);
+  --card: oklch(1 0 0);
+  --card-foreground: oklch(0.145 0 0);
+  --popover: oklch(1 0 0);
+  --popover-foreground: oklch(0.145 0 0);
+  --primary: oklch(0.602 0.183 54.13);
+  --primary-foreground: oklch(1 0 0);
+  --secondary: oklch(0.97 0 0);
+  --secondary-foreground: oklch(0.205 0 0);
+  --muted: oklch(0.97 0 0);
+  --muted-foreground: oklch(0.556 0 0);
+  --accent: oklch(0.602 0.183 54.13);
+  --accent-foreground: oklch(1 0 0);
+  --destructive: oklch(0.577 0.245 27.325);
+  --border: oklch(0.922 0 0);
+  --input: oklch(0.922 0 0);
+  --ring: oklch(0.602 0.183 54.13);
+  --chart-1: oklch(0.602 0.183 54.13);
+  --chart-2: oklch(0.6 0.118 184.704);
+  --chart-3: oklch(0.398 0.07 227.392);
+  --chart-4: oklch(0.828 0.189 84.429);
+  --chart-5: oklch(0.769 0.188 70.08);
+  --sidebar: oklch(0.985 0 0);
+  --sidebar-foreground: oklch(0.145 0 0);
+  --sidebar-primary: oklch(0.602 0.183 54.13);
+  --sidebar-primary-foreground: oklch(1 0 0);
+  --sidebar-accent: oklch(0.97 0 0);
+  --sidebar-accent-foreground: oklch(0.205 0 0);
+  --sidebar-border: oklch(0.922 0 0);
+  --sidebar-ring: oklch(0.602 0.183 54.13);
+}
+
+@layer base {
+  * {
+    @apply border-border outline-ring/50;
+  }
+  body {
+    @apply bg-background text-foreground;
+  }
+}

src/app/layout.tsx

@@ -0,0 +1,44 @@
+import type { Metadata } from "next";
+import { Geist, Geist_Mono } from "next/font/google";
+import { SessionProvider } from "@/components/providers/session-provider";
+import { ThemeProvider } from "@/components/providers/theme-provider";
+import { Toaster } from "@/components/ui/sonner";
+import { TooltipProvider } from "@/components/ui/tooltip";
+import { APP_NAME } from "@/lib/constants";
+import "./globals.css";
+
+const geistSans = Geist({
+  variable: "--font-geist-sans",
+  subsets: ["latin"],
+});
+
+const geistMono = Geist_Mono({
+  variable: "--font-geist-mono",
+  subsets: ["latin"],
+});
+
+export const metadata: Metadata = {
+  title: {
+    default: APP_NAME,
+    template: `%s | ${APP_NAME}`,
+  },
+  description:
+    "Self-hosted inventory management for 3D printing filament, resin, and miniature paints",
+};
+
+export default function RootLayout({ children }: { children: React.ReactNode }) {
+  return (
+    <html lang="en" className="dark" suppressHydrationWarning>
+      <body className={`${geistSans.variable} ${geistMono.variable} font-sans antialiased`}>
+        <SessionProvider>
+          <ThemeProvider>
+            <TooltipProvider delayDuration={0}>
+              {children}
+              <Toaster richColors position="bottom-right" />
+            </TooltipProvider>
+          </ThemeProvider>
+        </SessionProvider>
+      </body>
+    </html>
+  );
+}

src/app/loading.tsx

@@ -0,0 +1,9 @@
+import { Flame } from "lucide-react";
+
+export default function Loading() {
+  return (
+    <div className="flex min-h-screen items-center justify-center">
+      <Flame className="h-8 w-8 animate-pulse text-primary" />
+    </div>
+  );
+}

src/app/not-found.tsx

@@ -0,0 +1,14 @@
+import Link from "next/link";
+import { Button } from "@/components/ui/button";
+
+export default function NotFound() {
+  return (
+    <div className="flex min-h-screen flex-col items-center justify-center gap-4">
+      <h1 className="text-4xl font-bold">404</h1>
+      <p className="text-muted-foreground">Page not found</p>
+      <Button asChild>
+        <Link href="/dashboard">Back to Dashboard</Link>
+      </Button>
+    </div>
+  );
+}

src/app/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from "next/navigation";
+
+export default function Home() {
+  redirect("/dashboard");
+}