[split-required] Split website + studio-v2 monoliths (Phase 3 continued)

Website (14 monoliths split):
- compliance/page.tsx (1,519 → 9), docs/audit (1,262 → 20)
- quality (1,231 → 16), alerts (1,203 → 10), docs (1,202 → 11)
- i18n.ts (1,173 → 8 language files)
- unity-bridge (1,094 → 12), backlog (1,087 → 6)
- training (1,066 → 8), rag (1,063 → 8)
- Deleted index_original.ts (4,899 LOC dead backup)

Studio-v2 (5 monoliths split):
- meet/page.tsx (1,481 → 9), messages (1,166 → 9)
- AlertsB2BContext.tsx (1,165 → 5 modules)
- alerts-b2b/page.tsx (1,019 → 6), korrektur/archiv (1,001 → 6)

All existing imports preserved. Zero new TypeScript errors.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

studio-v2/app/messages/_components/ChatArea.tsx

@@ -0,0 +1,425 @@
+'use client'
+
+import { useRef, useEffect } from 'react'
+import {
+  formatMessageDate,
+  getContactInitials,
+  getRoleLabel,
+  getRoleColor,
+  type Conversation,
+  type Message,
+  type Contact,
+} from '@/lib/MessagesContext'
+import { EmojiPicker } from './EmojiPicker'
+import { TemplatesDropdown } from './TemplatesDropdown'
+
+interface ChatAreaProps {
+  isDark: boolean
+  currentConversation: Conversation | null | undefined
+  currentContact: Contact | undefined
+  groupedMessages: { date: string; messages: Message[] }[]
+  messageInput: string
+  sendWithEmail: boolean
+  isSending: boolean
+  showEmojiPicker: boolean
+  showTemplates: boolean
+  templates: { id: string; name: string; content: string }[]
+  setMessageInput: (val: string) => void
+  setSendWithEmail: (val: boolean) => void
+  setShowEmojiPicker: (val: boolean) => void
+  setShowTemplates: (val: boolean) => void
+  setShowContactInfo: (val: boolean) => void
+  showContactInfo: boolean
+  handleSendMessage: () => void
+  handleEmojiSelect: (emoji: string) => void
+  handleContextMenu: (e: React.MouseEvent, messageId: string) => void
+  getSenderName: (senderId: string) => string
+  pinConversation: (id: string) => void
+  muteConversation: (id: string) => void
+  setShowNewConversation: (val: boolean) => void
+}
+
+export function ChatArea({
+  isDark, currentConversation, currentContact, groupedMessages,
+  messageInput, sendWithEmail, isSending, showEmojiPicker, showTemplates, templates,
+  setMessageInput, setSendWithEmail, setShowEmojiPicker, setShowTemplates,
+  setShowContactInfo, showContactInfo,
+  handleSendMessage, handleEmojiSelect, handleContextMenu,
+  getSenderName, pinConversation, muteConversation, setShowNewConversation,
+}: ChatAreaProps) {
+  const messagesEndRef = useRef<HTMLDivElement>(null)
+  const inputRef = useRef<HTMLTextAreaElement>(null)
+
+  useEffect(() => {
+    messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' })
+  }, [groupedMessages])
+
+  const handleKeyDown = (e: React.KeyboardEvent) => {
+    if (e.key === 'Enter' && !e.shiftKey) {
+      e.preventDefault()
+      handleSendMessage()
+    }
+  }
+
+  return (
+    <div className={`flex-1 backdrop-blur-xl border rounded-3xl flex flex-col overflow-hidden ${
+      isDark
+        ? 'bg-white/10 border-white/20'
+        : 'bg-white/70 border-black/10 shadow-xl'
+    }`}>
+      {currentConversation ? (
+        <>
+          {/* Chat Header */}
+          <ChatHeader isDark={isDark} conversation={currentConversation}
+            contact={currentContact} showContactInfo={showContactInfo}
+            setShowContactInfo={setShowContactInfo}
+            pinConversation={pinConversation} muteConversation={muteConversation} />
+
+          {/* Messages */}
+          <div className={`flex-1 overflow-y-auto p-4 space-y-6 ${
+            isDark
+              ? 'bg-gradient-to-b from-transparent to-black/10'
+              : 'bg-gradient-to-b from-transparent to-slate-50/50'
+          }`}>
+            {groupedMessages.length === 0 ? (
+              <div className={`text-center py-12 ${isDark ? 'text-white/40' : 'text-slate-400'}`}>
+                <div className="w-20 h-20 mx-auto mb-4 rounded-full flex items-center justify-center text-4xl bg-gradient-to-br from-green-500/20 to-emerald-500/20">
+                  👋
+                </div>
+                <p className="font-medium text-lg">Noch keine Nachrichten</p>
+                <p className="text-sm mt-1">Starten Sie die Konversation!</p>
+              </div>
+            ) : (
+              groupedMessages.map((group, groupIndex) => (
+                <MessageGroup key={groupIndex} isDark={isDark} group={group}
+                  currentConversation={currentConversation}
+                  getSenderName={getSenderName}
+                  handleContextMenu={handleContextMenu} />
+              ))
+            )}
+            <div ref={messagesEndRef} />
+          </div>
+
+          {/* Message Input */}
+          <MessageInput isDark={isDark} messageInput={messageInput} sendWithEmail={sendWithEmail}
+            isSending={isSending} showEmojiPicker={showEmojiPicker} showTemplates={showTemplates}
+            templates={templates} inputRef={inputRef}
+            setMessageInput={setMessageInput} setSendWithEmail={setSendWithEmail}
+            setShowEmojiPicker={setShowEmojiPicker} setShowTemplates={setShowTemplates}
+            handleSendMessage={handleSendMessage} handleEmojiSelect={handleEmojiSelect}
+            handleKeyDown={handleKeyDown} />
+        </>
+      ) : (
+        <EmptyState isDark={isDark} setShowNewConversation={setShowNewConversation} />
+      )}
+    </div>
+  )
+}
+
+// ============================================
+// SUB-COMPONENTS
+// ============================================
+
+function ChatHeader({ isDark, conversation, contact, showContactInfo, setShowContactInfo, pinConversation, muteConversation }: {
+  isDark: boolean; conversation: Conversation; contact: Contact | undefined
+  showContactInfo: boolean; setShowContactInfo: (val: boolean) => void
+  pinConversation: (id: string) => void; muteConversation: (id: string) => void
+}) {
+  return (
+    <div className={`p-4 border-b ${isDark ? 'border-white/10' : 'border-slate-200'}`}>
+      <div className="flex items-center justify-between">
+        <div className="flex items-center gap-3">
+          <div className="relative">
+            <div className={`w-12 h-12 rounded-full flex items-center justify-center text-lg font-semibold ${
+              conversation.is_group
+                ? isDark
+                  ? 'bg-gradient-to-br from-purple-500/30 to-pink-500/30 text-purple-300'
+                  : 'bg-gradient-to-br from-purple-100 to-pink-100 text-purple-700'
+                : contact?.online
+                  ? isDark
+                    ? 'bg-gradient-to-br from-green-500/30 to-emerald-500/30 text-green-300'
+                    : 'bg-gradient-to-br from-green-100 to-emerald-100 text-green-700'
+                  : isDark
+                    ? 'bg-slate-700 text-slate-300'
+                    : 'bg-slate-200 text-slate-600'
+            }`}>
+              {conversation.title ? getContactInitials(conversation.title) : '?'}
+            </div>
+            {!conversation.is_group && contact?.online && (
+              <span className="absolute bottom-0 right-0 w-3 h-3 bg-green-500 rounded-full border-2 border-white dark:border-slate-900" />
+            )}
+          </div>
+          <div>
+            <h3 className={`font-semibold ${isDark ? 'text-white' : 'text-slate-900'}`}>
+              {conversation.title || 'Unbenannt'}
+            </h3>
+            <div className="flex items-center gap-2">
+              {conversation.typing ? (
+                <span className={`text-sm ${isDark ? 'text-green-400' : 'text-green-600'}`}>schreibt...</span>
+              ) : contact ? (
+                <>
+                  <span className={`text-xs px-2 py-0.5 rounded-full ${getRoleColor(contact.role, isDark)}`}>
+                    {getRoleLabel(contact.role)}
+                  </span>
+                  {contact.student_name && (
+                    <span className={`text-xs ${isDark ? 'text-white/60' : 'text-slate-500'}`}>
+                      • {contact.student_name}
+                    </span>
+                  )}
+                  {contact.online && (
+                    <span className={`text-xs ${isDark ? 'text-green-400' : 'text-green-600'}`}>• Online</span>
+                  )}
+                </>
+              ) : conversation.is_group && (
+                <span className={`text-sm ${isDark ? 'text-white/60' : 'text-slate-500'}`}>
+                  {conversation.participant_ids.length} Mitglieder
+                </span>
+              )}
+            </div>
+          </div>
+        </div>
+
+        {/* Actions */}
+        <div className="flex items-center gap-2">
+          <HeaderButton isDark={isDark} active={conversation.pinned}
+            activeColor="amber" onClick={() => pinConversation(conversation.id)}
+            title={conversation.pinned ? 'Nicht mehr anheften' : 'Anheften'}>
+            <svg className="w-5 h-5" fill={conversation.pinned ? 'currentColor' : 'none'} stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1.5} d="M5 5a2 2 0 012-2h10a2 2 0 012 2v16l-7-3.5L5 21V5z" />
+            </svg>
+          </HeaderButton>
+          <HeaderButton isDark={isDark} active={conversation.muted}
+            activeColor="red" onClick={() => muteConversation(conversation.id)}
+            title={conversation.muted ? 'Ton aktivieren' : 'Stummschalten'}>
+            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              {conversation.muted ? (
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1.5} d="M5.586 15H4a1 1 0 01-1-1v-4a1 1 0 011-1h1.586l4.707-4.707C10.923 3.663 12 4.109 12 5v14c0 .891-1.077 1.337-1.707.707L5.586 15z M17 14l2-2m0 0l2-2m-2 2l-2-2m2 2l2 2" />
+              ) : (
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1.5} d="M15.536 8.464a5 5 0 010 7.072M18.364 5.636a9 9 0 010 12.728M5.586 15H4a1 1 0 01-1-1v-4a1 1 0 011-1h1.586l4.707-4.707C10.923 3.663 12 4.109 12 5v14c0 .891-1.077 1.337-1.707.707L5.586 15z" />
+              )}
+            </svg>
+          </HeaderButton>
+          <HeaderButton isDark={isDark} active={showContactInfo}
+            activeColor="green" onClick={() => setShowContactInfo(!showContactInfo)}>
+            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1.5} d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
+            </svg>
+          </HeaderButton>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+function HeaderButton({ isDark, active, activeColor, onClick, title, children }: {
+  isDark: boolean; active: boolean; activeColor: string
+  onClick: () => void; title?: string; children: React.ReactNode
+}) {
+  const activeClasses: Record<string, string> = {
+    amber: isDark ? 'bg-amber-500/20 text-amber-300' : 'bg-amber-100 text-amber-700',
+    red: isDark ? 'bg-red-500/20 text-red-300' : 'bg-red-100 text-red-700',
+    green: isDark ? 'bg-green-500/20 text-green-300' : 'bg-green-100 text-green-700',
+  }
+  return (
+    <button onClick={onClick} title={title}
+      className={`p-2 rounded-xl transition-all ${
+        active
+          ? activeClasses[activeColor]
+          : isDark
+            ? 'hover:bg-white/10 text-white/60'
+            : 'hover:bg-slate-100 text-slate-400'
+      }`}>
+      {children}
+    </button>
+  )
+}
+
+function MessageGroup({ isDark, group, currentConversation, getSenderName, handleContextMenu }: {
+  isDark: boolean; group: { date: string; messages: Message[] }
+  currentConversation: Conversation
+  getSenderName: (id: string) => string
+  handleContextMenu: (e: React.MouseEvent, id: string) => void
+}) {
+  return (
+    <div>
+      <div className="flex items-center justify-center mb-4">
+        <span className={`px-4 py-1.5 rounded-full text-xs font-medium ${
+          isDark ? 'bg-white/10 text-white/60' : 'bg-slate-200 text-slate-600'
+        }`}>
+          {group.date}
+        </span>
+      </div>
+      <div className="space-y-3">
+        {group.messages.map((msg) => {
+          const isSelf = msg.sender_id === 'self'
+          const isGroupMsg = currentConversation.is_group && !isSelf
+          return (
+            <div key={msg.id} className={`flex ${isSelf ? 'justify-end' : 'justify-start'}`}
+              onContextMenu={(e) => handleContextMenu(e, msg.id)}>
+              <div className={`max-w-[70%] ${isSelf ? 'order-2' : ''}`}>
+                {isGroupMsg && (
+                  <span className={`text-xs ml-3 mb-1 block ${isDark ? 'text-purple-400' : 'text-purple-600'}`}>
+                    {getSenderName(msg.sender_id)}
+                  </span>
+                )}
+                <div className={`rounded-2xl px-4 py-2.5 shadow-sm ${
+                  isSelf
+                    ? 'bg-gradient-to-r from-green-500 to-emerald-500 text-white rounded-br-md'
+                    : isDark
+                      ? 'bg-white/10 text-white rounded-bl-md'
+                      : 'bg-white text-slate-900 rounded-bl-md shadow-lg'
+                }`}>
+                  <p className="whitespace-pre-wrap break-words">{msg.content}</p>
+                  {msg.reactions && msg.reactions.length > 0 && (
+                    <div className="flex gap-1 mt-2">
+                      {msg.reactions.map((r, i) => (
+                        <span key={i} className={`text-sm px-1.5 py-0.5 rounded-full ${isDark ? 'bg-white/20' : 'bg-slate-100'}`}>
+                          {r.emoji}
+                        </span>
+                      ))}
+                    </div>
+                  )}
+                  <div className={`flex items-center gap-2 mt-1 ${
+                    isSelf ? 'text-white/70 justify-end' : isDark ? 'text-white/40' : 'text-slate-400'
+                  }`}>
+                    <span className="text-xs">
+                      {new Date(msg.timestamp).toLocaleTimeString('de-DE', { hour: '2-digit', minute: '2-digit' })}
+                    </span>
+                    {isSelf && (
+                      <>
+                        {msg.delivered && (
+                          <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M5 13l4 4L19 7" />
+                          </svg>
+                        )}
+                        {msg.email_sent && <span className="text-xs">✉️</span>}
+                      </>
+                    )}
+                  </div>
+                </div>
+              </div>
+            </div>
+          )
+        })}
+      </div>
+    </div>
+  )
+}
+
+function MessageInput({ isDark, messageInput, sendWithEmail, isSending, showEmojiPicker, showTemplates, templates, inputRef,
+  setMessageInput, setSendWithEmail, setShowEmojiPicker, setShowTemplates,
+  handleSendMessage, handleEmojiSelect, handleKeyDown }: {
+  isDark: boolean; messageInput: string; sendWithEmail: boolean; isSending: boolean
+  showEmojiPicker: boolean; showTemplates: boolean
+  templates: { id: string; name: string; content: string }[]
+  inputRef: React.RefObject<HTMLTextAreaElement | null>
+  setMessageInput: (val: string) => void; setSendWithEmail: (val: boolean) => void
+  setShowEmojiPicker: (val: boolean) => void; setShowTemplates: (val: boolean) => void
+  handleSendMessage: () => void; handleEmojiSelect: (emoji: string) => void
+  handleKeyDown: (e: React.KeyboardEvent) => void
+}) {
+  return (
+    <div className={`p-4 border-t ${isDark ? 'border-white/10' : 'border-slate-200'}`}>
+      <div className="flex items-center gap-2 mb-3">
+        <button onClick={() => setSendWithEmail(!sendWithEmail)}
+          className={`flex items-center gap-2 px-3 py-1.5 rounded-xl text-sm transition-all ${
+            sendWithEmail
+              ? isDark ? 'bg-blue-500/20 text-blue-300' : 'bg-blue-100 text-blue-700'
+              : isDark ? 'bg-white/5 text-white/40 hover:bg-white/10' : 'bg-slate-100 text-slate-400 hover:bg-slate-200'
+          }`}>
+          <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1.5} d="M3 8l7.89 5.26a2 2 0 002.22 0L21 8M5 19h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z" />
+          </svg>
+          E-Mail
+        </button>
+      </div>
+
+      <div className="flex items-end gap-2">
+        <div className="relative">
+          <button onClick={() => { setShowEmojiPicker(!showEmojiPicker); setShowTemplates(false) }}
+            className={`p-3 rounded-2xl transition-all ${
+              showEmojiPicker
+                ? isDark ? 'bg-green-500/20 text-green-300' : 'bg-green-100 text-green-700'
+                : isDark ? 'bg-white/5 text-white/60 hover:bg-white/10' : 'bg-slate-100 text-slate-500 hover:bg-slate-200'
+            }`}>
+            <span className="text-xl">😊</span>
+          </button>
+          {showEmojiPicker && (
+            <EmojiPicker onSelect={handleEmojiSelect} onClose={() => setShowEmojiPicker(false)} isDark={isDark} />
+          )}
+        </div>
+
+        <div className="relative">
+          <button onClick={() => { setShowTemplates(!showTemplates); setShowEmojiPicker(false) }}
+            className={`p-3 rounded-2xl transition-all ${
+              showTemplates
+                ? isDark ? 'bg-purple-500/20 text-purple-300' : 'bg-purple-100 text-purple-700'
+                : isDark ? 'bg-white/5 text-white/60 hover:bg-white/10' : 'bg-slate-100 text-slate-500 hover:bg-slate-200'
+            }`}>
+            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1.5} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
+            </svg>
+          </button>
+          {showTemplates && (
+            <TemplatesDropdown templates={templates}
+              onSelect={(content) => { setMessageInput(content); setShowTemplates(false); inputRef.current?.focus() }}
+              isDark={isDark} />
+          )}
+        </div>
+
+        <textarea ref={inputRef} value={messageInput}
+          onChange={(e) => setMessageInput(e.target.value)} onKeyDown={handleKeyDown}
+          placeholder="Nachricht schreiben..." rows={1}
+          className={`flex-1 px-4 py-3 rounded-2xl border resize-none transition-all ${
+            isDark
+              ? 'bg-white/5 border-white/10 text-white placeholder:text-white/40 focus:border-green-500/50'
+              : 'bg-white border-slate-200 text-slate-900 placeholder:text-slate-400 focus:border-green-500'
+          } focus:outline-none focus:ring-2 focus:ring-green-500/20`}
+          style={{ maxHeight: '120px' }} />
+
+        <button onClick={handleSendMessage} disabled={!messageInput.trim() || isSending}
+          className={`p-3 rounded-2xl transition-all ${
+            messageInput.trim() && !isSending
+              ? 'bg-gradient-to-r from-green-500 to-emerald-500 text-white shadow-lg hover:shadow-green-500/30'
+              : isDark
+                ? 'bg-white/5 text-white/30 cursor-not-allowed'
+                : 'bg-slate-100 text-slate-300 cursor-not-allowed'
+          }`}>
+          {isSending ? (
+            <svg className="w-6 h-6 animate-spin" fill="none" viewBox="0 0 24 24">
+              <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
+              <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z" />
+            </svg>
+          ) : (
+            <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 19l9 2-9-18-9 18 9-2zm0 0v-8" />
+            </svg>
+          )}
+        </button>
+      </div>
+    </div>
+  )
+}
+
+function EmptyState({ isDark, setShowNewConversation }: { isDark: boolean; setShowNewConversation: (val: boolean) => void }) {
+  return (
+    <div className="flex-1 flex items-center justify-center">
+      <div className={`text-center max-w-md px-8 ${isDark ? 'text-white/40' : 'text-slate-400'}`}>
+        <div className="w-24 h-24 mx-auto mb-6 rounded-full flex items-center justify-center text-5xl bg-gradient-to-br from-green-500/20 to-emerald-500/20">
+          💬
+        </div>
+        <h3 className={`text-2xl font-bold mb-3 ${isDark ? 'text-white' : 'text-slate-900'}`}>
+          BreakPilot Messenger
+        </h3>
+        <p className="text-sm leading-relaxed">
+          Kommunizieren Sie sicher mit Eltern und Kollegen.
+          Waehlen Sie eine Konversation aus der Liste oder starten Sie eine neue Unterhaltung.
+        </p>
+        <button onClick={() => setShowNewConversation(true)}
+          className="mt-6 px-6 py-3 bg-gradient-to-r from-green-500 to-emerald-500 text-white rounded-2xl font-medium shadow-lg hover:shadow-green-500/30 transition-all">
+          Neue Nachricht
+        </button>
+      </div>
+    </div>
+  )
+}