feat(i18n): migrate hardcoded German strings to t() across 104 components/pages — AST-based batch with re-parse gate, 423 new de.json keys; tsc clean; vitest failures byte-identical to clean-tree baseline (pre-existing)

frontend/src/components/window/Window.tsx

@@ -3,12 +3,14 @@ import clsx from 'clsx';
 import { Sparkles, Maximize2, Minimize2, Minus, X } from 'lucide-react';
 import { useWindowStore, type WindowState } from '@/store/windowStore';
 import { AiChatPanel } from './AiChatPanel';
+import { useTranslation } from 'react-i18next';
 
 interface WindowProps {
   window: WindowState;
 }
 
 export function Window({ window: win }: WindowProps) {
+  const { t } = useTranslation();
   const {
     closeWindow,
     minimizeWindow,
@@ -106,8 +108,8 @@ export function Window({ window: win }: WindowProps) {
               'p-1.5 rounded hover:bg-secondary-200',
               win.aiChatVisible && 'bg-primary-100 text-primary-600'
             )}
-            aria-label="KI Chat ein/aus"
-            title="KI Chat"
+            aria-label={t('window.kichateinaus')}
+            title={t('window.kichat')}
           >
             <Sparkles className="w-4 h-4" />
           </button>
@@ -128,8 +130,8 @@ export function Window({ window: win }: WindowProps) {
           <button
             onClick={() => minimizeWindow(win.id)}
             className="p-1.5 rounded hover:bg-secondary-200"
-            aria-label="Minimieren"
-            title="Minimieren"
+            aria-label={t('window.minimieren')}
+            title={t('window.minimieren')}
           >
             <Minus className="w-4 h-4" />
           </button>
@@ -137,8 +139,8 @@ export function Window({ window: win }: WindowProps) {
           <button
             onClick={() => closeWindow(win.id)}
             className="p-1.5 rounded hover:bg-danger-100 hover:text-danger-600"
-            aria-label="Schließen"
-            title="Schließen"
+            aria-label={t('window.schließen')}
+            title={t('window.schließen')}
           >
             <X className="w-4 h-4" />
           </button>