feat: custom views accordion - save/apply/delete named views with filter+sort+group config

frontend/src/pages/ContactsList.tsx

@@ -19,7 +19,7 @@ import { SavedFilters } from '@/components/SavedFilters';
 import { SavedFilterBar } from '@/components/common/SavedFilterBar';
 import { TagSelector } from '@/components/tags/TagSelector';
 import type { Tag } from '@/api/tags';
-import { ArrowDownAZ, ArrowUpZA, Bookmark, ChevronLeft, ExternalLink, LayoutGrid, List, Plus, Printer, Table2 } from 'lucide-react';
+import { ArrowDownAZ, ArrowUpZA, Bookmark, ChevronLeft, ExternalLink, LayoutGrid, List, Plus, Printer, Table2, X } from 'lucide-react';
 import { FilterPanel, applyFilters, emptyFilterState, type FilterState } from '@/components/contacts/FilterPanel';
 import { SortPanel, applySorting, emptySortState, type SortState } from '@/components/contacts/SortPanel';
 import { GroupPanel, applyGrouping, emptyGroupState, type GroupState, type GroupedContacts } from '@/components/contacts/GroupPanel';
@@ -50,6 +50,8 @@ export function ContactsListPage() {
   const [groupState, setGroupState] = useState<GroupState>(emptyGroupState);
   const [viewsOpen, setViewsOpen] = useState(true);
   const [foldersOpen, setFoldersOpen] = useState(true);
+  const [savedViews, setSavedViews] = useState<{ id: string; name: string; filterState: FilterState; sortState: SortState; groupState: GroupState; selectedFilter: ContactFilter; viewMode: ContactViewMode }[]>([]);
+  const [activeViewId, setActiveViewId] = useState<string | null>(null);
   const openWindow = useWindowStore((s) => s.openWindow);
 
   // Debounce search
@@ -195,6 +197,40 @@ export function ContactsListPage() {
     setActiveView('list');
   }, []);
 
+  // Save current view configuration as a custom view
+  const handleSaveView = useCallback(() => {
+    const name = window.prompt('Name für diese Ansicht:', 'Meine Ansicht');
+    if (!name) return;
+    const id = `view-${Date.now()}`;
+    setSavedViews((prev) => [...prev, {
+      id,
+      name,
+      filterState: { ...filterState },
+      sortState: { ...sortState },
+      groupState: { ...groupState },
+      selectedFilter,
+      viewMode,
+    }]);
+    setActiveViewId(id);
+  }, [filterState, sortState, groupState, selectedFilter, viewMode]);
+
+  // Apply a saved custom view
+  const applySavedView = useCallback((view: { id: string; filterState: FilterState; sortState: SortState; groupState: GroupState; selectedFilter: ContactFilter; viewMode: ContactViewMode }) => {
+    setFilterState({ ...view.filterState });
+    setSortState({ ...view.sortState });
+    setGroupState({ ...view.groupState });
+    setSelectedFilter(view.selectedFilter);
+    setViewMode(view.viewMode);
+    setActiveViewId(view.id);
+    setPage(1);
+  }, []);
+
+  // Delete a saved custom view
+  const deleteSavedView = useCallback((id: string) => {
+    setSavedViews((prev) => prev.filter((v) => v.id !== id));
+    if (activeViewId === id) setActiveViewId(null);
+  }, [activeViewId]);
+
   // Sort options
   const sortOptions = useMemo(() => [
     { value: 'displayname', label: t('contacts.fullName') },
@@ -334,7 +370,7 @@ export function ContactsListPage() {
     ];
     registerItems('contacts', items);
     return () => unregisterPlugin('contacts');
-  }, [handleSearch, handleCreate, handleSelectFilter, t, registerItems, unregisterPlugin, selectedFilter, viewMode, sortOptions, viewModeOptions, filterState, contactType, sortState, groupState]);
+  }, [handleSearch, handleCreate, handleSelectFilter, handleSaveView, applySavedView, deleteSavedView, t, registerItems, unregisterPlugin, selectedFilter, viewMode, sortOptions, viewModeOptions, filterState, contactType, sortState, groupState, savedViews, activeViewId]);
 
   return (
     <div className="flex flex-col h-full" data-testid="contacts-list-page">
@@ -349,7 +385,7 @@ export function ContactsListPage() {
           data-testid="contact-folder-pane"
         >
           <div className="flex flex-col h-full overflow-y-auto">
-            {/* Accordion 1: Views */}
+            {/* Accordion 1: Custom Views */}
             <div className="border-b border-secondary-200">
               <button
                 onClick={() => setViewsOpen(!viewsOpen)}
@@ -365,23 +401,67 @@ export function ContactsListPage() {
               </button>
               {viewsOpen && (
                 <div className="px-3 pb-2 space-y-0.5">
-                  {[
-                    { value: 'list', label: t('contacts.viewList'), icon: <List className="w-3.5 h-3.5" strokeWidth={2} /> },
-                    { value: 'table', label: t('contacts.viewTable'), icon: <Table2 className="w-3.5 h-3.5" strokeWidth={2} /> },
-                    { value: 'cards', label: t('contacts.viewCards'), icon: <LayoutGrid className="w-3.5 h-3.5" strokeWidth={2} /> },
-                  ].map((opt) => (
-                    <button
-                      key={opt.value}
-                      onClick={() => setViewMode(opt.value as ContactViewMode)}
-                      className={`
-                        w-full flex items-center gap-2 px-2 py-1.5 rounded text-xs text-left transition-colors
-                        ${viewMode === opt.value ? 'bg-primary-100 text-primary-700 font-medium' : 'text-secondary-600 hover:bg-secondary-100'}
-                      `}
-                    >
-                      {opt.icon}
-                      {opt.label}
-                    </button>
-                  ))}
+                  {/* Default view */}
+                  <button
+                    onClick={() => {
+                      setFilterState(emptyFilterState);
+                      setSortState(emptySortState);
+                      setGroupState(emptyGroupState);
+                      setSelectedFilter('all');
+                      setViewMode('list');
+                    }}
+                    className={`
+                      w-full flex items-center gap-2 px-2 py-1.5 rounded text-xs text-left transition-colors
+                      ${!filterState.conditions.length && !sortState.conditions.length && !groupState.conditions.length && selectedFilter === 'all'
+                        ? 'bg-primary-100 text-primary-700 font-medium'
+                        : 'text-secondary-600 hover:bg-secondary-100'}
+                    `}
+                  >
+                    <List className="w-3.5 h-3.5" strokeWidth={2} />
+                    Standardansicht
+                  </button>
+                  {/* Placeholder for saved custom views */}
+                  {savedViews.length === 0 ? (
+                    <div className="px-2 py-3 text-center">
+                      <p className="text-[11px] text-secondary-400 mb-2">Keine benutzerdefinierten Ansichten</p>
+                      <button
+                        onClick={handleSaveView}
+                        className="inline-flex items-center gap-1 px-2 py-1 text-[11px] text-primary-600 hover:bg-primary-50 rounded transition-colors"
+                      >
+                        <Plus className="w-3 h-3" />
+                        Aktuelle Ansicht speichern
+                      </button>
+                    </div>
+                  ) : (
+                    <>
+                      {savedViews.map((view) => (
+                        <button
+                          key={view.id}
+                          onClick={() => applySavedView(view)}
+                          className={`
+                            w-full flex items-center gap-2 px-2 py-1.5 rounded text-xs text-left transition-colors group
+                            ${activeViewId === view.id ? 'bg-primary-100 text-primary-700 font-medium' : 'text-secondary-600 hover:bg-secondary-100'}
+                          `}
+                        >
+                          <Bookmark className="w-3.5 h-3.5 flex-shrink-0" strokeWidth={2} />
+                          <span className="flex-1 truncate">{view.name}</span>
+                          <button
+                            onClick={(e) => { e.stopPropagation(); deleteSavedView(view.id); }}
+                            className="opacity-0 group-hover:opacity-100 text-secondary-400 hover:text-red-600 transition-opacity"
+                          >
+                            <X className="w-3 h-3" />
+                          </button>
+                        </button>
+                      ))}
+                      <button
+                        onClick={handleSaveView}
+                        className="w-full flex items-center gap-1 px-2 py-1.5 rounded text-xs text-primary-600 hover:bg-primary-50 transition-colors"
+                      >
+                        <Plus className="w-3 h-3" />
+                        Aktuelle Ansicht speichern
+                      </button>
+                    </>
+                  )}
                 </div>
               )}
             </div>