fix: AI loop prevention (no tools on last iteration), calendar button first, mail filter in toolbar, AI folder rename query invalidation

frontend/src/components/ai/SessionList.tsx

@@ -1,5 +1,6 @@
 import React, { useEffect, useState, useRef, useCallback } from 'react';
 import clsx from 'clsx';
+import { useQueryClient } from '@tanstack/react-query';
 import {
   fetchSessions, createSession, deleteSession, updateSession,
   fetchFolders, createFolder, deleteFolder, updateFolder,
@@ -261,6 +262,7 @@ export function SessionList({ activeSessionId, onSelectSession, isSidebar, class
   const [dragSessionId, setDragSessionId] = useState<string | null>(null);
   const [dragFolderId, setDragFolderId] = useState<string | null>(null);
   const [contextMenu, setContextMenu] = useState<ContextMenuState | null>(null);
+  const queryClient = useQueryClient();
 
   const loadData = async () => {
     try {
@@ -287,7 +289,10 @@ export function SessionList({ activeSessionId, onSelectSession, isSidebar, class
     if (!newName) return;
     try {
       if (type === 'session') await updateSession(id, { title: newName });
-      else await updateFolder(id, { name: newName });
+      else {
+        await updateFolder(id, { name: newName });
+        queryClient.invalidateQueries({ queryKey: ['ai', 'folders'] });
+      }
       loadData();
     } catch (e) { setError(e instanceof Error ? e.message : 'Rename failed'); }
   };

frontend/src/pages/Calendar.tsx

@@ -327,6 +327,31 @@ export function CalendarPage() {
 
   useEffect(() => {
     const items = [
+      // New appointment — ganz links
+      {
+        id: 'new-appointment',
+        plugin: 'calendar',
+        label: t('calendar.newAppointment'),
+        group: 'actions',
+        onClick: () => {
+          openWindow({
+            title: t('calendar.newAppointment'),
+            type: 'appointment-create',
+            component: AppointmentEditForm,
+            componentProps: {
+              entry: null,
+              prefillDate: null,
+              calendars,
+              defaultCalendarId: activeCalendarId,
+              onSaved: handleSaved,
+              onDeleted: handleDeleted,
+            },
+          });
+        },
+        icon: (
+          <Plus className="w-3.5 h-3.5" strokeWidth={2} />
+        ),
+      },
       // Navigation group
       {
         id: 'nav-prev',
@@ -384,31 +409,6 @@ export function CalendarPage() {
         onSelect: (value: string) => setViewMode(value as CalendarViewMode),
         onClick: () => {},
       },
-      // Actions group
-      {
-        id: 'new-appointment',
-        plugin: 'calendar',
-        label: t('calendar.newAppointment'),
-        group: 'actions',
-        onClick: () => {
-          openWindow({
-            title: t('calendar.newAppointment'),
-            type: 'appointment-create',
-            component: AppointmentEditForm,
-            componentProps: {
-              entry: null,
-              prefillDate: null,
-              calendars,
-              defaultCalendarId: activeCalendarId,
-              onSaved: handleSaved,
-              onDeleted: handleDeleted,
-            },
-          });
-        },
-        icon: (
-          <Plus className="w-3.5 h-3.5" strokeWidth={2} />
-        ),
-      },
       {
         id: 'ics-import',
         plugin: 'calendar',

frontend/src/pages/Mail.tsx

@@ -594,6 +594,43 @@ export function MailPage() {
         onSearch: handleSearch,
         onClick: () => {},
       },
+      // FilterPanel — SavedFilterBar + TagSelector
+      {
+        id: 'filter-panel',
+        plugin: 'mail',
+        label: 'Filter',
+        type: 'custom' as const,
+        group: 'filter',
+        customComponent: (
+          <SavedFilterBar
+            entityType="mail"
+            currentFilters={{ search: searchQuery, sortBy, sortOrder, folderId: selectedFolderId }}
+            onApplyFilter={(criteria) => {
+              if (criteria.search !== undefined) handleSearch(criteria.search);
+              if (criteria.sortBy) setSortBy(criteria.sortBy as 'date' | 'from' | 'subject');
+              if (criteria.sortOrder) setSortOrder(criteria.sortOrder as 'asc' | 'desc');
+            }}
+          />
+        ),
+        onClick: () => {},
+      },
+      {
+        id: 'tag-filter',
+        plugin: 'mail',
+        label: 'Tags',
+        type: 'custom' as const,
+        group: 'filter',
+        customComponent: (
+          <TagSelector
+            entityType="file"
+            entityId={selectedMail?.id ?? ''}
+            selectedTags={selectedTags}
+            onChange={setSelectedTags}
+            placeholder={t('tags.selectPlaceholder', 'Tags filtern...')}
+          />
+        ),
+        onClick: () => {},
+      },
       {
         id: 'compose',
         plugin: 'mail',
@@ -814,27 +851,6 @@ export function MailPage() {
           className="border-r border-secondary-200 bg-white"
           data-testid="mail-list-pane"
         >
-          {/* Saved filter bar + tag selector */}
-          <div className="flex items-center gap-2 px-3 py-2 border-b border-secondary-200 bg-secondary-50 flex-wrap" data-testid="mail-filter-bar">
-            <SavedFilterBar
-              entityType="mail"
-              currentFilters={{ search: searchQuery, sortBy, sortOrder, folderId: selectedFolderId }}
-              onApplyFilter={(criteria) => {
-                if (criteria.search !== undefined) handleSearch(criteria.search);
-                if (criteria.sortBy) setSortBy(criteria.sortBy as 'date' | 'from' | 'subject');
-                if (criteria.sortOrder) setSortOrder(criteria.sortOrder as 'asc' | 'desc');
-              }}
-            />
-            <div className="flex-1 min-w-[180px]" data-testid="mail-tag-selector">
-              <TagSelector
-                entityType="file"
-                entityId={selectedMail?.id ?? ''}
-                selectedTags={selectedTags}
-                onChange={setSelectedTags}
-                placeholder={t('tags.selectPlaceholder', 'Tags filtern...')}
-              />
-            </div>
-          </div>
           <MailList
             mails={mails}
             selectedMailId={selectedMail?.id || null}