feat(knowledge): add service library

frontend/athena/app/knowledge/manufacturers/page.tsx

@@ -0,0 +1,132 @@
+"use client";
+
+import { useCallback, useEffect, useMemo, useState } from "react";
+import { Edit, Plus, Trash2 } from "lucide-react";
+
+import ConfirmDialog from "@/components/common/ConfirmDialog";
+import DataTable, { type DataTableColumn } from "@/components/common/DataTable";
+import SearchInput from "@/components/common/SearchInput";
+import { useToast } from "@/components/common/ToastProvider";
+import { ManufacturerFormDialog } from "@/components/knowledge/KnowledgeForms";
+import { Button } from "@/components/ui/button";
+import { api } from "@/lib/api";
+import type { KnowledgeManufacturer, ManufacturerPayload } from "@/types/knowledge";
+
+function errorMessage(error: unknown) {
+  if (typeof error === "object" && error !== null && "response" in error) {
+    return (error as { response?: { data?: { detail?: string } } }).response?.data?.detail ?? "Aktion fehlgeschlagen";
+  }
+  return "Aktion fehlgeschlagen";
+}
+
+export default function KnowledgeManufacturersPage() {
+  const { showToast } = useToast();
+  const [items, setItems] = useState<KnowledgeManufacturer[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState("");
+  const [formError, setFormError] = useState("");
+  const [pending, setPending] = useState(false);
+  const [search, setSearch] = useState("");
+  const [sortKey, setSortKey] = useState("name");
+  const [sortDirection, setSortDirection] = useState<"asc" | "desc">("asc");
+  const [formOpen, setFormOpen] = useState(false);
+  const [selected, setSelected] = useState<KnowledgeManufacturer | null>(null);
+  const [deleteItem, setDeleteItem] = useState<KnowledgeManufacturer | null>(null);
+
+  const loadItems = useCallback(async () => {
+    setLoading(true);
+    try {
+      const response = await api.get<KnowledgeManufacturer[]>("/knowledge/manufacturers?limit=100");
+      setItems(response.data);
+      setError("");
+    } catch (err) {
+      setError(errorMessage(err));
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    queueMicrotask(() => {
+      void loadItems();
+    });
+  }, [loadItems]);
+
+  const rows = useMemo(() => items
+    .filter((item) => item.name.toLowerCase().includes(search.toLowerCase()))
+    .sort((a, b) => {
+      const av = String(a[sortKey as keyof KnowledgeManufacturer] ?? "").toLowerCase();
+      const bv = String(b[sortKey as keyof KnowledgeManufacturer] ?? "").toLowerCase();
+      const result = av > bv ? 1 : av < bv ? -1 : 0;
+      return sortDirection === "asc" ? result : -result;
+    }), [items, search, sortDirection, sortKey]);
+
+  const columns: DataTableColumn<KnowledgeManufacturer>[] = [
+    { key: "name", label: "Name", sortable: true, render: (item) => <span className="font-medium">{item.name}</span> },
+    { key: "website", label: "Website", sortable: true, render: (item) => item.website || "-" },
+    { key: "notes", label: "Notizen", render: (item) => item.notes || "-" },
+    {
+      key: "actions",
+      label: "Aktionen",
+      className: "px-4 py-3 text-right",
+      render: (item) => (
+        <div className="flex justify-end gap-2">
+          <Button variant="ghost" size="icon-sm" title="Bearbeiten" onClick={() => { setSelected(item); setFormError(""); setFormOpen(true); }}><Edit size={16} /></Button>
+          <Button variant="destructive" size="icon-sm" title="Löschen" onClick={() => setDeleteItem(item)}><Trash2 size={16} /></Button>
+        </div>
+      ),
+    },
+  ];
+
+  async function save(payload: ManufacturerPayload) {
+    setPending(true);
+    setFormError("");
+    try {
+      if (selected) {
+        await api.put(`/knowledge/manufacturers/${selected.id}`, payload);
+        showToast({ type: "success", title: "Hersteller aktualisiert", description: payload.name });
+      } else {
+        await api.post("/knowledge/manufacturers", payload);
+        showToast({ type: "success", title: "Hersteller erstellt", description: payload.name });
+      }
+      setFormOpen(false);
+      await loadItems();
+    } catch (err) {
+      const message = errorMessage(err);
+      setFormError(message);
+      showToast({ type: "error", title: "Hersteller konnte nicht gespeichert werden", description: message });
+    } finally {
+      setPending(false);
+    }
+  }
+
+  async function confirmDelete() {
+    if (!deleteItem) return;
+    setPending(true);
+    try {
+      await api.delete(`/knowledge/manufacturers/${deleteItem.id}`);
+      showToast({ type: "success", title: "Hersteller gelöscht", description: deleteItem.name });
+      setDeleteItem(null);
+      await loadItems();
+    } catch (err) {
+      showToast({ type: "error", title: "Hersteller konnte nicht gelöscht werden", description: errorMessage(err) });
+    } finally {
+      setPending(false);
+    }
+  }
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-col gap-4 lg:flex-row lg:items-center lg:justify-between">
+        <div><h1 className="text-3xl font-bold text-slate-950">Hersteller</h1><p className="mt-1 text-sm text-slate-500">{rows.length} Einträge</p></div>
+        <Button onClick={() => { setSelected(null); setFormError(""); setFormOpen(true); }}><Plus size={16} />Hersteller</Button>
+      </div>
+      <div className="rounded-lg border bg-white p-4"><SearchInput value={search} onChange={setSearch} placeholder="Hersteller suchen" /></div>
+      <DataTable columns={columns} rows={rows} rowKey={(item) => item.id} sortKey={sortKey} sortDirection={sortDirection} loading={loading} error={error} emptyTitle="Keine Hersteller" emptyDescription="Lege den ersten Hersteller an." onSort={(key) => { setSortKey(key); setSortDirection((current) => sortKey === key && current === "asc" ? "desc" : "asc"); }} />
+      <ManufacturerFormDialog open={formOpen} manufacturer={selected} pending={pending} error={formError} onOpenChange={setFormOpen} onSubmit={save} />
+      <ConfirmDialog open={Boolean(deleteItem)} title="Hersteller löschen" description="Dieser Hersteller wird gelöscht, sofern keine abhängigen Dokumente bestehen." pending={pending} onOpenChange={(open) => !open && setDeleteItem(null)} onConfirm={confirmDelete}>
+        {deleteItem && <p className="text-sm font-medium">{deleteItem.name}</p>}
+      </ConfirmDialog>
+    </div>
+  );
+}