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/AiChatPanel.tsx

@@ -3,6 +3,7 @@ import React, { useState, useRef, useEffect, useCallback } from 'react';
 import { Sparkles, Send } from 'lucide-react';
 import { streamChat, fetchMessages } from '@/api/ai';
 import { apiClient } from '@/api/client';
+import { useTranslation } from 'react-i18next';
 
 interface AiChatPanelProps {
   windowTitle: string;
@@ -16,6 +17,7 @@ interface SimpleMessage {
 }
 
 export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
+  const { t } = useTranslation();
   const [messages, setMessages] = useState<SimpleMessage[]>([]);
   const [input, setInput] = useState('');
   const [isStreaming, setIsStreaming] = useState(false);
@@ -118,10 +120,10 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
       <div className="flex flex-col h-full">
         <div className="px-4 py-2 border-b border-secondary-200 bg-secondary-50 flex items-center gap-2">
           <Sparkles className="w-4 h-4 text-primary-500" />
-          <span className="text-sm font-semibold text-secondary-700">KI Assistent</span>
+          <span className="text-sm font-semibold text-secondary-700">{t('aiChatPanel.kiassistent')}</span>
         </div>
         <div className="flex-1 flex items-center justify-center text-sm text-secondary-400">
-          Verbinde mit KI...
+          {t('aiChatPanel.verbindemitki')}
         </div>
       </div>
     );
@@ -132,7 +134,7 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
       <div className="flex flex-col h-full">
         <div className="px-4 py-2 border-b border-secondary-200 bg-secondary-50 flex items-center gap-2">
           <Sparkles className="w-4 h-4 text-primary-500" />
-          <span className="text-sm font-semibold text-secondary-700">KI Assistent</span>
+          <span className="text-sm font-semibold text-secondary-700">{t('aiChatPanel.kiassistent')}</span>
         </div>
         <div className="flex-1 flex items-center justify-center p-4 text-center">
           <div>
@@ -149,7 +151,7 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
       {/* Header */}
       <div className="px-4 py-2 border-b border-secondary-200 bg-secondary-50 flex items-center gap-2">
         <Sparkles className="w-4 h-4 text-primary-500" />
-        <span className="text-sm font-semibold text-secondary-700">KI Assistent</span>
+        <span className="text-sm font-semibold text-secondary-700">{t('aiChatPanel.kiassistent')}</span>
       </div>
 
       {/* Context info */}
@@ -161,7 +163,7 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
       <div ref={scrollRef} className="flex-1 overflow-y-auto p-4 space-y-2">
         {messages.length === 0 && !streamingContent && (
           <p className="text-sm text-secondary-400 text-center mt-4">
-            Stelle eine Frage zum aktuellen Fenster...
+            {t('aiChatPanel.stelleeinefragezumaktuellenfenster')}
           </p>
         )}
         {messages.map((msg) => (
@@ -193,7 +195,7 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
             value={input}
             onChange={(e) => setInput(e.target.value)}
             onKeyDown={handleKeyDown}
-            placeholder="Nachricht eingeben..."
+            placeholder={t('aiChatPanel.nachrichteingeben')}
             rows={1}
             className="flex-1 px-3 py-2 text-sm rounded-md border border-secondary-300 focus:outline-none focus:ring-2 focus:ring-primary-500 resize-none"
             disabled={isStreaming}
@@ -202,7 +204,7 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
             onClick={handleSend}
             disabled={!input.trim() || isStreaming}
             className="p-2 rounded-md bg-primary-600 text-white hover:bg-primary-700 disabled:opacity-50 disabled:cursor-not-allowed"
-            aria-label="Senden"
+            aria-label={t('aiChatPanel.senden')}
           >
             <Send className="w-4 h-4" />
           </button>

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>