src/app.js

import { ChatView } from './views/chat/chat-view.js?v=13';
import { db } from './db/database.js';
import { Clipboard } from '@capacitor/clipboard';
import { authService } from './services/auth-service.js';
import { syncManager } from './services/sync-service.js';
import { ttsService } from './services/tts-service.js';
import { appShortcutsService } from './services/app-shortcuts-service.js';
import { showVocabularyModal } from './views/vocabulary-modal.js';
import { TextToSpeech } from '@capacitor-community/text-to-speech';

// Handle PWA Service Worker
if ('serviceWorker' in navigator) {
  if (window.Capacitor) {
    // IMPORTANT: If we are in the native Capacitor app, we MUST NOT use a Service Worker.
    // A Service Worker here would aggressively cache local files and prevent app updates!
    navigator.serviceWorker.getRegistrations().then(function(registrations) {
      for(let registration of registrations) {
        registration.unregister();
        console.log('Successfully unregistered old PWA Service Worker in Capacitor');
      }
    });
  } else {
    // We are in a normal browser (e.g. HuggingFace). Register the PWA Service Worker.
    import('virtual:pwa-register').then(({ registerSW }) => {
      registerSW({ immediate: true });
    }).catch(err => console.warn('PWA Registration failed', err));
  }
}

// Handle App Shortcuts and Intents globally
window.addEventListener('appShortcutAction', (e) => {
  if (e.detail && e.detail.shortcutId === 'add_vocabulary') {
    showVocabularyModal();
  }
});

window.ttsService = ttsService;
window.TextToSpeech = TextToSpeech;

window.appPrompt = function(message) {
  return new Promise(resolve => {
    const overlay = document.createElement('div');
    overlay.className = 'custom-modal-overlay';
    overlay.innerHTML = `
      <div class="custom-modal">
        <h3>Eingabe</h3>
        <p>${message}</p>
        <input type="text" style="width:100%; padding:10px; border-radius:8px; border:1px solid rgba(255,255,255,0.2); background:rgba(0,0,0,0.5); color:#fff; margin-top:8px; outline:none;" id="app-prompt-input" autocomplete="off" />
        <div class="modal-actions">
          <button class="modal-btn cancel">Abbrechen</button>
          <button class="modal-btn confirm">Speichern</button>
        </div>
      </div>
    `;
    document.body.appendChild(overlay);
    const input = overlay.querySelector('#app-prompt-input');
    const cancelBtn = overlay.querySelector('.cancel');
    const confirmBtn = overlay.querySelector('.confirm');
    
    input.focus();
    
    const close = (val) => {
      input.blur();
      overlay.classList.add('fade-out');
      setTimeout(() => { overlay.remove(); resolve(val); }, 300);
    };
    
    cancelBtn.onclick = () => close(null);
    confirmBtn.onclick = () => close(input.value.trim() ? input.value.trim() : null);
    input.onkeydown = (e) => {
      if (e.key === 'Enter') close(input.value.trim() ? input.value.trim() : null);
      if (e.key === 'Escape') close(null);
    };
  });
};

window.appConfirm = function(message, confirmText = "Löschen", cancelText = "Abbrechen") {
  return new Promise(resolve => {
    const overlay = document.createElement('div');
    overlay.className = 'custom-modal-overlay';
    overlay.innerHTML = `
      <div class="custom-modal">
        <h3>Bestätigung</h3>
        <p>${message}</p>
        <div class="modal-actions" style="margin-top: 16px;">
          <button class="modal-btn cancel">${cancelText}</button>
          <button class="modal-btn confirm" style="background: var(--destructive); border-color: var(--destructive); color: white;">${confirmText}</button>
        </div>
      </div>
    `;
    document.body.appendChild(overlay);
    const cancelBtn = overlay.querySelector('.cancel');
    const confirmBtn = overlay.querySelector('.confirm');
    
    const close = (val) => {
      overlay.classList.add('fade-out');
      setTimeout(() => { overlay.remove(); resolve(val); }, 300);
    };
    
    cancelBtn.onclick = () => close(false);
    confirmBtn.onclick = () => close(true);
  });
};

window.copyToClipboard = async (text, btnElement) => {
  const showCheckmark = () => {
    if (!btnElement) return;
    const svg = btnElement.querySelector('svg');
    if (!svg) return;
    const oldHtml = svg.outerHTML;
    svg.outerHTML = '<svg viewBox="0 0 24 24" width="16" height="16" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"></polyline></svg>';
    setTimeout(() => {
      btnElement.innerHTML = oldHtml;
    }, 2000);
  };

  const formatForNotes = (raw) => {
    if (!raw) return raw;
    
    // 1. Strip inline formatting and block markers
    let text = raw
      .replace(/\*\*(.*?)\*\*/g, '$1')
      .replace(/__(.*?)__/g, '$1')
      .replace(/\*(.*?)\*/g, '$1')
      .replace(/_(.*?)_/g, '$1')
      .replace(/~~(.*?)~~/g, '$1')
      .replace(/`(.*?)`/g, '$1')
      .replace(/\[(.*?)\]\(.*?\)/g, '$1')
      .replace(/^```[a-z]*\n/gm, '')
      .replace(/^```\s*$/gm, '')
      .replace(/^>\s+/gm, '');

    const lines = text.split('\n');
    const processedLines = [];
    let previousRealLineWasList = false;
    let emptyLinesSeen = 0;

    for (let i = 0; i < lines.length; i++) {
      let line = lines[i].trim();
      
      if (line === '') {
        emptyLinesSeen++;
        continue;
      }

      const headerMatch = line.match(/^#+\s+(.*)$/);
      const listMatch = line.match(/^([\*\-]|\d+\.)\s+(.*)$/);

      if (headerMatch) {
        // Empty line before header
        if (processedLines.length > 0 && processedLines[processedLines.length - 1] !== '') {
          processedLines.push('');
        }
        processedLines.push(headerMatch[1]);
        // Empty line after header
        processedLines.push('');
        previousRealLineWasList = false;
        emptyLinesSeen = 0;
      } else if (listMatch) {
        if (!previousRealLineWasList) {
          // Empty line before first list item
          if (processedLines.length > 0 && processedLines[processedLines.length - 1] !== '') {
            processedLines.push('');
          }
        }
        const bullet = (listMatch[1] === '*' || listMatch[1] === '-') ? '• ' : `${listMatch[1]} `;
        processedLines.push(`${bullet}${listMatch[2]}`);
        previousRealLineWasList = true;
        emptyLinesSeen = 0;
      } else {
        // Normal text
        if (previousRealLineWasList) {
          // Ensure empty line after list
          if (processedLines.length > 0 && processedLines[processedLines.length - 1] !== '') {
            processedLines.push('');
          }
        } else if (emptyLinesSeen > 0 && processedLines.length > 0) {
          // Maintain paragraph breaks for text
          if (processedLines[processedLines.length - 1] !== '') {
            processedLines.push('');
          }
        }
        processedLines.push(line);
        previousRealLineWasList = false;
        emptyLinesSeen = 0;
      }
    }

    return processedLines.join('\n').trim();
  };

  const formattedText = formatForNotes(text);

  try {
    await Clipboard.write({ string: formattedText });
    showCheckmark();
  } catch (e) {
    console.log('Capacitor Clipboard fallback:', e);
    // Legacy fallback for non-secure HTTP contexts
    try {
      if (navigator.clipboard && navigator.clipboard.writeText) {
        await navigator.clipboard.writeText(formattedText);
      } else {
        const textArea = document.createElement("textarea");
        textArea.value = formattedText;
        textArea.style.position = "fixed";
        textArea.style.left = "-999999px";
        textArea.style.top = "-999999px";
        document.body.appendChild(textArea);
        textArea.focus();
        textArea.select();
        document.execCommand('copy');
        textArea.remove();
      }
      showCheckmark();
    } catch (err) {
      console.error('Copy failed:', err);
    }
  }
};

const initApp = async () => {
  // FAST PATH: Check for overlay mode IMMEDIATELY, before any heavy initialization.
  // This cuts ~1-2 seconds off overlay startup by skipping auth, sync, etc.
  const isNative = window.Capacitor && typeof window.Capacitor.isNativePlatform === 'function' && window.Capacitor.isNativePlatform();
  
  if (isNative) {
    const { QuickSettings } = window.Capacitor.Plugins;
    if (QuickSettings) {
      const intentResult = await QuickSettings.getPendingIntentAction();
      
      if (intentResult && intentResult.overlay_mode === true) {
        // Force transparent on EVERY layer via cssText (highest inline priority)
        document.documentElement.style.cssText = 'background: transparent !important; background-color: transparent !important;';
        document.body.style.cssText = 'background: transparent !important; background-color: transparent !important; margin: 0; padding: 0; visibility: visible !important;';
        
        // Hide ALL non-modal elements
        const hideSelectors = ['#app', '.aurora-background', '#ambient-light', '#live-version-badge', 'svg[style*="pointer-events: none"]'];
        hideSelectors.forEach(sel => {
          const el = document.querySelector(sel);
          if (el) el.style.display = 'none';
        });
        
        window.isOverlayMode = true;
        
        await db.initPromise;
        showVocabularyModal();
        
        // Signal native side to fade in the window (prevents black flash)
        QuickSettings.overlayReady();
        
        return; // Early return — skip ALL heavy initialization
      }
    }
  }

  // NORMAL APP PATH: Full initialization
  await db.initPromise;
  
  await authService.initialize();
  await syncManager.initialize();
  await appShortcutsService.initialize();

  // Load background style
  const bgStyle = db.getSetting('background_style') || 'standard';
  document.body.setAttribute('data-bg-style', bgStyle);
  
  // Make body visible for normal app
  document.body.style.visibility = 'visible';

  // Process any pending vocabulary from the Quick Settings native overlay
  const processOfflineVocabularyQueue = async () => {
    if (!isNative) return;
    try {
      const { QuickSettings } = window.Capacitor.Plugins;
      if (QuickSettings) {
        const { queue } = await QuickSettings.getPendingVocab();
        if (queue && queue !== '[]') {
          const words = JSON.parse(queue);
          if (words.length > 0) {
            console.log("Processing offline vocabulary queue:", words);
            
            // Start background translation process
            setTimeout(async () => {
              const { aiRouter } = await import('./ai/router.js');
              let addedCount = 0;
              
              for (const word of words) {
                try {
                  const prompt = `Übersetze das folgende Wort oder den Satz. Wenn es Deutsch ist, übersetze es ins Englische. Wenn es Englisch ist, übersetze es ins Deutsche.
Falls das Wort extrem falsch geschrieben ist (z.B. phonetisch nach Gehör geschrieben), erkenne das korrekte Wort automatisch und übersetze es.
Das korrekte Wort soll in "front" stehen und die Übersetzung in "back".
Zusätzlich generiere:
- "explanation": 1-2 kurze Sätze in der Sprache der Übersetzung ('back'), die genau dieses Wort erklären. WICHTIG: Markiere das Lernwort (und seine Abwandlungen) IMMER fett mit HTML-Tags (z.B. <b>Wort</b>).
- "example": Ein prägnanter Beispielsatz mit der Übersetzung ('back'). Das Lernwort MUSS auch hier mit <b>...</b> fett markiert sein.
- "imageQuery": Ein präziser englischer Suchbegriff für die Bing-Bildersuche. Das Bild muss EINDEUTIG zur Übersetzung passen. Füge IMMER 'single photo, clear focus, high quality' am Ende hinzu. Keine abstrakten Cartoons.

Antworte AUSSCHLIESSLICH mit einem validen JSON-Objekt. Keine Markdown-Formatierung.
Beispiel für "abanden": 
{"front": "abandon", "back": "verlassen", "explanation": "Jemanden oder etwas <b>verlassen</b> oder aufgeben.", "example": "Er musste das alte Auto <b>verlassen</b>.", "imageQuery": "abandoned old car single photo clear focus"}
Zu übersetzen: "${word}"`;
                  
                  const response = await aiRouter.sendMessage(prompt, { 
                    model: db.getSetting('model') || 'gemini-1.5-flash'
                  });

                  let jsonStr = response.trim();
                  if (jsonStr.startsWith('```json')) jsonStr = jsonStr.replace(/```json/g, '').replace(/```/g, '').trim();
                  else if (jsonStr.startsWith('```')) jsonStr = jsonStr.replace(/```/g, '').trim();
                  
                  let parsed = null;
                  try { 
                    parsed = JSON.parse(jsonStr); 
                  } catch (e) { 
                    console.warn("JSON parse failed, trying fallback...", jsonStr);
                    parsed = { front: word, back: response.replace(/\{|\}/g, '').replace(/"/g, '').replace(/back:|front:|\\n/gi, '').trim(), explanation: "", example: "", imageQuery: encodeURIComponent(word) }; 
                  }

                  if (parsed && parsed.back) {
                    let decks = db.getDecks();
                    let schnelldeck = decks.find(d => d.title === 'Schnelleingabe' || d.title === 'Inbox');
                    if (!schnelldeck) schnelldeck = db.createDeck('Schnelleingabe', 'Automatisch gespeicherte Vokabeln aus der Schnelleingabe', '#8a53e6', 'Englisch', 'Deutsch');

                    let finalBack = parsed.back;
                    if (parsed.explanation && parsed.example) {
                      finalBack = `${parsed.back}\n\n**Erklärung:** ${parsed.explanation}\n\n**Beispiel:** ${parsed.example}`;
                    }
                    const searchTerms = encodeURIComponent(parsed.imageQuery || parsed.front);
                    const imageUrl = `https://tse1.mm.bing.net/th?q=${searchTerms}&w=800&h=1000&c=7&rs=1`;

                    db.addFlashcard(schnelldeck.id, parsed.front, finalBack, imageUrl);
                    addedCount++;
                  }
                } catch (e) {
                  console.error("Failed to translate offline word:", word, e);
                }
              }
              
              await QuickSettings.clearPendingVocab();
              
              if (addedCount > 0) {
                // Dispatch event so UI can refresh if user is on flashcards page
                window.dispatchEvent(new CustomEvent('flashcards-updated'));
                
                // Show a small toast notification
                const toast = document.createElement('div');
                toast.style = "position: fixed; top: 20px; left: 50%; transform: translateX(-50%); background: rgba(52, 199, 89, 0.95); color: white; padding: 12px 24px; border-radius: 30px; font-weight: 600; font-size: 15px; z-index: 99999; box-shadow: 0 8px 24px rgba(0,0,0,0.3); animation: slide-down 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);";
                toast.innerHTML = `✨ ${addedCount} Vokabel(n) hinzugefügt!`;
                document.body.appendChild(toast);
                setTimeout(() => {
                  toast.style.opacity = '0';
                  toast.style.transition = 'opacity 0.4s';
                  setTimeout(() => toast.remove(), 400);
                }, 4000);
              }
            }, 1000); // Wait 1s instead of 2s
          }
        }
      }
    } catch (e) {
      console.warn("Error reading pending vocab queue:", e);
    }
  };

  const processEnrichmentQueue = async () => {
    // Only run if we're not in the tiny transparent overlay mode
    if (window.isOverlayMode) return;
    
    let pendingCards = db.getPendingCards();
    if (!pendingCards || pendingCards.length === 0) return;

    if (!window.isEnriching) {
      window.isEnriching = true;
      try {
        const { aiRouter } = await import('./ai/router.js');
        
        // Process sequentially
        for (const card of pendingCards) {
          const word = card.front;
          const pureTranslation = card.back.replace('<!-- PENDING_CORRECTION -->', '').replace('<!-- NEEDS_ENRICHMENT -->', '').trim();
          
          const prompt = `Erstelle eine kurze Erklärung und ein passendes Beispiel für diese Vokabelkarte, sowie einen Suchbegriff für ein Bild.
Wort: "${word}"
Übersetzung: "${pureTranslation}"

WICHTIG: Prüfe, ob das "Wort" offensichtlich falsch geschrieben ist (z.B. phonetisch nach Gehör geschrieben). 
Falls es einen Tippfehler enthält, gib das richtig geschriebene Wort im Feld "correctedWord" zurück. Wenn es korrekt geschrieben ist, lass das Feld weg oder setze es auf null.

Generiere:
- "explanation": 1-2 kurze Sätze in der Sprache der Übersetzung, die genau dieses Wort erklären. WICHTIG: Markiere das Lernwort (und seine Abwandlungen) IMMER fett mit HTML-Tags (z.B. <b>Wort</b>).
- "example": Ein prägnanter Beispielsatz mit der Übersetzung. Das Lernwort MUSS auch hier mit <b>...</b> fett markiert sein.
- "imageQuery": Ein präziser englischer Suchbegriff für die Bing-Bildersuche. Das Bild muss EINDEUTIG zur Übersetzung passen. Füge IMMER 'single photo, clear focus, high quality' am Ende hinzu. Keine abstrakten Cartoons.

Antworte AUSSCHLIESSLICH mit einem validen JSON-Objekt. Keine Markdown-Formatierung.
Beispiel für Tippfehler bei "abanden": 
{"correctedWord": "abandon", "explanation": "Jemanden oder etwas <b>verlassen</b> oder aufgeben.", "example": "Er musste das alte Auto <b>verlassen</b>.", "imageQuery": "abandoned old car single photo clear focus"}`;
            
            const response = await aiRouter.sendMessage(prompt, { 
              model: db.getSetting('model') || 'gemini-1.5-flash', // Use standard model to ensure it doesn't fail
              disableTools: true // VERY IMPORTANT: Prevent AI from calling create_flashcards and duplicating the deck
            });

            let jsonStr = response.trim();
            if (jsonStr.startsWith('```json')) jsonStr = jsonStr.replace(/```json/g, '').replace(/```/g, '').trim();
            else if (jsonStr.startsWith('```')) jsonStr = jsonStr.replace(/```/g, '').trim();
            
            try { 
              const parsed = JSON.parse(jsonStr); 
              if (parsed.explanation && parsed.example) {
                const finalBack = `${pureTranslation}\n\n**Erklärung:** ${parsed.explanation}\n\n**Beispiel:** ${parsed.example}`;
                const searchTerms = encodeURIComponent(parsed.imageQuery || word);
                const imageUrl = `https://tse1.mm.bing.net/th?q=${searchTerms}&w=800&h=1000&c=7&rs=1`;
                
                // If the AI corrected a typo, use it. Otherwise use the original front.
                const finalFront = parsed.correctedWord ? parsed.correctedWord : card.front;
                
                db.editFlashcard(card.id, finalFront, finalBack, imageUrl);
                console.log(`Enriched card: ${word}`);
              }
            } catch (e) { 
              console.warn("JSON parse failed for enrichment", jsonStr);
            }
            
            // Small pause between requests to avoid rate limits
            await new Promise(r => setTimeout(r, 500));
          }
          
          // Dispatch event ONCE after all retroactive enrichment is done, to prevent UI scrolling spam
          window.dispatchEvent(new CustomEvent('flashcards-updated'));
          
          if (document.visibilityState === 'visible') {
            const toast = document.createElement('div');
            toast.style = "position: fixed; top: 20px; left: 50%; transform: translateX(-50%); background: rgba(52, 199, 89, 0.95); color: white; padding: 12px 24px; border-radius: 30px; font-weight: 600; font-size: 15px; z-index: 99999; box-shadow: 0 8px 24px rgba(0,0,0,0.3); animation: slide-down 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);";
            toast.innerHTML = `✨ Vokabel im Hintergrund geprüft und vervollständigt!`;
            document.body.appendChild(toast);
            setTimeout(() => {
              toast.style.opacity = '0';
              toast.style.transition = 'opacity 0.4s ease';
              setTimeout(() => toast.remove(), 400);
            }, 3000);
          }
        } catch (e) {
          console.error("Enrichment queue failed", e);
        } finally {
          window.isEnriching = false;
        }
    }
  };

  // Run on startup
  processOfflineVocabularyQueue();
  processEnrichmentQueue();

  // Check if we were launched with a native Intent (non-overlay)
  if (isNative) {
    const { QuickSettings } = window.Capacitor.Plugins;
    if (QuickSettings) {
      const intentResult = await QuickSettings.getPendingIntentAction();
      
      if (intentResult && intentResult.action === 'add_vocabulary') {
        showVocabularyModal();
      }
    }
  }

  // Run whenever the app resumes (comes to foreground)
  document.addEventListener("visibilitychange", async () => {
    if (document.visibilityState === 'visible') {
      processOfflineVocabularyQueue();
      processEnrichmentQueue();
      if (isNative) {
        const { QuickSettings } = window.Capacitor.Plugins;
        if (QuickSettings) {
          const intentResult = await QuickSettings.getPendingIntentAction();
          
          if (intentResult && intentResult.overlay_mode === true) {
            document.body.style.background = 'transparent';
            document.body.style.backgroundColor = 'transparent';
            const appElement = document.getElementById('app');
            if (appElement) appElement.style.display = 'none';
            window.isOverlayMode = true;
            showVocabularyModal();
          } else if (intentResult && intentResult.action === 'add_vocabulary') {
            showVocabularyModal();
          }
        }
      }
    }
  });

  // Scale up UI on web (HuggingFace) to match Capacitor native scale
  const isMobile = /iPhone|iPad|iPod|Android/i.test(navigator.userAgent);
  if (!isNative && isMobile) {
    document.documentElement.style.zoom = '1.15';
  }
  console.log('SchoolMind AI initialized');
  
  const appContainer = document.getElementById('app');
  
  // Basic skeleton for the layout
  appContainer.innerHTML = `
    <!-- Sidebar Drawer -->
    <div id="sidebar-overlay" class="sidebar-overlay"></div>
    <div id="history-sidebar" class="sidebar-drawer">
      <div class="sidebar-inner">
        <div class="sidebar-header">
          <h2>Verlauf</h2>
          <div style="display: flex; gap: 8px;">
            <button id="fullscreen-sidebar-btn" class="icon-btn" style="font-size: 16px; width: 32px; height: 32px;">⛶</button>
            <button id="close-sidebar-btn" class="icon-btn" style="font-size: 24px; width: 32px; height: 32px;">×</button>
          </div>
        </div>
        <div style="padding: 0 16px 12px 16px;">
          <input type="text" id="history-search-input" placeholder="Chats durchsuchen..." style="width: 100%; padding: 10px 14px; border-radius: 12px; border: 1px solid rgba(255,255,255,0.1); background: rgba(0,0,0,0.3); color: white; outline: none; font-size: 14px; box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);">
        </div>
        <div id="history-list" class="history-list">
          <!-- History items will be injected here -->
        </div>
      </div>
    </div>

    <div class="view-container" id="router-view">
      <!-- Active view will be mounted here -->
    </div>
    
    <!-- TTS Floating Player (Apple Music Style) -->
    <div id="tts-player-container" class="tts-player-container collapsed">
      <div class="tts-player-inner liquid-glass-heavy" style="padding: 10px 16px;">
        <div class="tts-player-drag-handle" style="margin-bottom: 8px;"></div>
        <div class="tts-player-content" style="justify-content: space-between; width: 100%; display: flex; align-items: center;">
          <div style="flex: 1; display: flex; align-items: center;">
            <button id="tts-cc-btn" class="icon-btn tts-btn active" title="Live-Untertitel" style="margin-left: 0; color: var(--primary);">
              <svg viewBox="0 0 24 24" width="20" height="20" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="7" width="20" height="10" rx="2" ry="2"></rect><path d="M7 11h2"></path><path d="M11 11h6"></path><path d="M7 13h6"></path><path d="M15 13h2"></path></svg>
            </button>
          </div>
          <div class="tts-player-controls" style="gap: 12px; flex: 0 0 auto; display: flex; justify-content: center; align-items: center;">
            <button id="tts-prev-btn" class="icon-btn tts-btn">
              <svg viewBox="0 0 24 24" width="22" height="22" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M3 12a9 9 0 1 0 9-9 9.75 9.75 0 0 0-6.74 2.74L3 8"></path><path d="M3 3v5h5"></path><text x="12" y="16" font-size="8" text-anchor="middle" font-weight="bold" fill="currentColor" stroke="none">5</text></svg>
            </button>
            <button id="tts-play-btn" class="icon-btn tts-btn tts-play-btn" style="width: 36px; height: 36px;">
              <svg id="tts-play-icon" viewBox="0 0 24 24" width="20" height="20" fill="currentColor"><polygon points="7 3 21 12 7 21 7 3"></polygon></svg>
            </button>
            <button id="tts-next-btn" class="icon-btn tts-btn">
              <svg viewBox="0 0 24 24" width="22" height="22" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12a9 9 0 1 1-9-9 9.75 9.75 0 0 1 6.74 2.74L21 8"></path><path d="M21 3v5h-5"></path><text x="12" y="16" font-size="8" text-anchor="middle" font-weight="bold" fill="currentColor" stroke="none">5</text></svg>
            </button>
          </div>
          <div style="flex: 1; display: flex; justify-content: flex-end;">
            <button id="tts-rate-btn" class="tts-rate-btn" style="margin-left: 0;">1x</button>
          </div>
        </div>
      </div>
    </div>
    
    <!-- Input Capsule (Apple Style) -->
    <div class="input-capsule-container">
      
      <!-- Scroll to bottom button -->
      <button id="scroll-to-bottom-btn" class="liquid-glass" style="display: none; position: absolute; top: -46px; left: 50%; transform: translateX(-50%); background: rgba(30, 30, 35, 0.85); color: white; border: 1px solid rgba(255,255,255,0.15); border-radius: 50%; width: 36px; height: 36px; padding: 0; justify-content: center; align-items: center; z-index: 100; cursor: pointer; box-shadow: 0 4px 12px rgba(0,0,0,0.3); transition: opacity 0.2s, transform 0.2s, top 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);">
        <svg id="scroll-arrow-icon" viewBox="0 0 24 24" width="18" height="18" stroke="currentColor" stroke-width="2" fill="none" stroke-linecap="round" stroke-linejoin="round" style="margin-top: 2px;"><line x1="12" y1="4" x2="12" y2="20"></line><polyline points="18 14 12 20 6 14"></polyline></svg>
        <div id="scroll-typing-indicator" style="display: none; gap: 4px; align-items: center;">
          <div style="width: 5px; height: 5px; background: white; border-radius: 50%; animation: bounce 1.4s infinite ease-in-out both;"></div>
          <div style="width: 5px; height: 5px; background: white; border-radius: 50%; animation: bounce 1.4s infinite ease-in-out both; animation-delay: 0.16s;"></div>
          <div style="width: 5px; height: 5px; background: white; border-radius: 50%; animation: bounce 1.4s infinite ease-in-out both; animation-delay: 0.32s;"></div>
        </div>
      </button>

      <!-- File Permission Popup -->
      <div id="file-permission-popup" style="display: none; position: absolute; top: -100px; left: 16px; right: 16px; background: rgba(30, 30, 35, 0.95); border-radius: 16px; border: 1px solid rgba(182, 120, 242, 0.3); padding: 12px 16px; box-shadow: 0 8px 32px rgba(0,0,0,0.4); z-index: 101; backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); align-items: center; justify-content: space-between; gap: 12px; animation: slide-up 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);">
        <div style="display: flex; flex-direction: column; flex: 1; overflow: hidden;">
          <div style="font-size: 12px; font-weight: 600; color: #b678f2; margin-bottom: 2px;">KI Dateizugriff</div>
          <div id="file-permission-text" style="font-size: 13px; color: white; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;">Gemini möchte Datei X lesen.</div>
        </div>
        <div style="display: flex; flex-direction: column; gap: 6px;">
          <button id="file-permission-allow" style="background: #b678f2; color: white; border: none; padding: 6px 12px; border-radius: 8px; font-size: 13px; font-weight: 600; cursor: pointer;">Erlauben</button>
          <button id="file-permission-deny" style="background: rgba(255,255,255,0.1); color: white; border: none; padding: 6px 12px; border-radius: 8px; font-size: 13px; font-weight: 500; cursor: pointer;">Ablehnen</button>
        </div>
      </div>

      <div id="image-preview-container" style="display: none; padding: 12px 16px 16px 16px; z-index: 0; position: relative; gap: 12px; overflow-x: auto; white-space: nowrap; align-items: center;">
      </div>
      <div class="input-capsule siri-capsule" style="z-index: 1; position: relative;">
        <input type="file" id="image-upload-input" accept="image/*,application/pdf" multiple style="display: none;" />
        <button class="icon-btn" id="plus-menu-btn" title="Menü">
          <svg width="26" height="26" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" style="opacity: 0.7;"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg>
        </button>
        <textarea placeholder="Nachricht an Gemini..." rows="1" id="chat-input"></textarea>
        <button class="icon-btn primary" id="send-btn">
          <svg viewBox="0 0 24 24" width="26" height="26" stroke="currentColor" stroke-width="2" fill="none" style="margin-left: -2px; margin-top: 1px;"><line x1="22" y1="2" x2="11" y2="13"></line><polygon points="22 2 15 22 11 13 2 9 22 2"></polygon></svg>
      </div>
      
      <!-- Plus Popover Menu -->
      <div id="plus-popover-menu" class="liquid-glass-heavy" style="display: none; position: absolute; bottom: calc(100% + 16px); left: 16px; border-radius: 16px; padding: 12px; min-width: 260px; z-index: 10; box-shadow: 0 16px 40px rgba(0,0,0,0.4); border: 1px solid rgba(255,255,255,0.08); flex-direction: column; gap: 4px; transform-origin: bottom left; animation: popover-in 0.2s cubic-bezier(0.16, 1, 0.3, 1);">
        <div style="font-size: 11px; font-weight: 600; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 0.5px; padding: 4px 8px; margin-bottom: 4px;">Aktionen</div>
        <button id="menu-attach-image-btn" style="display: flex; align-items: center; gap: 12px; padding: 10px 12px; background: transparent; border: none; color: white; border-radius: 10px; cursor: pointer; text-align: left; font-size: 14px; transition: background 0.2s;" onmouseover="this.style.background='rgba(255,255,255,0.1)'" onmouseout="this.style.background='transparent'">
          <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" style="opacity: 0.7;"><rect width="18" height="18" x="3" y="3" rx="2" ry="2"/><circle cx="9" cy="9" r="2"/><path d="m21 15-3.086-3.086a2 2 0 0 0-2.828 0L6 21"/></svg>
          Bild/Dokument anhängen
        </button>
        
        <div style="height: 1px; background: rgba(255,255,255,0.1); margin: 6px 0;"></div>
        
        <div style="font-size: 11px; font-weight: 600; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 0.5px; padding: 4px 8px; margin-bottom: 4px;">Features</div>
        <div style="display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; border-radius: 10px; cursor: pointer; transition: background 0.2s;" onmouseover="this.style.background='rgba(255,255,255,0.1)'" onmouseout="this.style.background='transparent'" onclick="document.getElementById('deep-research-toggle').click()">
          <div style="display: flex; align-items: center; gap: 12px; font-size: 14px;">
            <span style="font-size: 16px;">✨</span> Vertiefte Recherche
          </div>
          <input type="checkbox" id="deep-research-toggle" class="ios-toggle" style="transform: scale(0.7); margin: 0; pointer-events: none;">
        </div>
        
        <div id="detective-board-container" style="display: none; align-items: center; justify-content: space-between; padding: 10px 12px; padding-left: 38px; border-radius: 10px; cursor: pointer; transition: background 0.2s;" onmouseover="this.style.background='rgba(255,255,255,0.1)'" onmouseout="this.style.background='transparent'" onclick="document.getElementById('detective-board-toggle').click()">
          <div style="display: flex; align-items: center; gap: 12px; font-size: 14px; color: rgba(255,255,255,0.8);">
            <span style="font-size: 16px;">🕵️</span> Detective Board
          </div>
          <input type="checkbox" id="detective-board-toggle" class="ios-toggle" style="transform: scale(0.7); margin: 0; pointer-events: none;" checked>
        </div>
        <!-- NEUER SLIDER / SELECT -->
        <div id="deep-research-time-container" style="display: none; padding: 0 12px 10px 38px; font-size: 12px; color: rgba(255,255,255,0.6);">
          <div style="display: flex; justify-content: space-between; align-items: center; gap: 8px;">
            <span>Dauer (Tiefe):</span>
            <select id="deep-research-time-select" style="background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); color: white; padding: 2px 6px; border-radius: 4px; outline: none; font-size: 12px;" onclick="event.stopPropagation()">
              <option value="1">1 Minute (Schnell)</option>
              <option value="3" selected>3 Minuten (Standard)</option>
              <option value="5">5 Minuten (Tief)</option>
              <option value="10">10 Minuten (Extrem)</option>
            </select>
          </div>
        </div>

        <div style="display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; border-radius: 10px; cursor: pointer; transition: background 0.2s;" onmouseover="this.style.background='rgba(255,255,255,0.1)'" onmouseout="this.style.background='transparent'" onclick="document.getElementById('extended-thinking-toggle').click()">
          <div style="display: flex; align-items: center; gap: 12px; font-size: 14px;">
            <span style="font-size: 16px;">🧠</span> Erweitertes Denken
          </div>
          <input type="checkbox" id="extended-thinking-toggle" class="ios-toggle" style="transform: scale(0.7); margin: 0; pointer-events: none;">
        </div>

        <div style="height: 1px; background: rgba(255,255,255,0.1); margin: 6px 0;"></div>

        <div style="font-size: 11px; font-weight: 600; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 0.5px; padding: 4px 8px; margin-bottom: 4px;">Lokales Wissen</div>
        <div style="display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; border-radius: 10px; cursor: pointer; transition: background 0.2s;" onmouseover="this.style.background='rgba(255,255,255,0.1)'" onmouseout="this.style.background='transparent'" onclick="document.getElementById('vault-search-toggle').click()">
          <div style="display: flex; align-items: center; gap: 12px; font-size: 14px;">
            <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" style="opacity: 0.7;"><path d="M4 20h16a2 2 0 0 0 2-2V8a2 2 0 0 0-2-2h-7.93a2 2 0 0 1-1.66-.9l-.82-1.2A2 2 0 0 0 7.93 3H4a2 2 0 0 0-2 2v13c0 1.1.9 2 2 2Z"/></svg>
            Vault durchsuchen
          </div>
          <input type="checkbox" id="vault-search-toggle" class="ios-toggle" style="transform: scale(0.7); margin: 0; pointer-events: none;">
        </div>
        
        <div style="height: 1px; background: rgba(255,255,255,0.1); margin: 6px 0;"></div>
        
        <div style="font-size: 11px; font-weight: 600; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 0.5px; padding: 4px 8px; margin-bottom: 4px;">Stimme & Stil</div>
        <div style="display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; border-radius: 10px; cursor: pointer; transition: background 0.2s;" onmouseover="this.style.background='rgba(255,255,255,0.1)'" onmouseout="this.style.background='transparent'" onclick="document.getElementById('plus-profile-toggle').click()">
          <div style="display: flex; align-items: center; gap: 12px; font-size: 14px;">
            <span style="font-size: 16px;">✍️</span> Persönlicher Style
          </div>
          <input type="checkbox" id="plus-profile-toggle" class="chat-profile-toggle ios-toggle" style="transform: scale(0.7); margin: 0; pointer-events: none;">
        </div>
      </div>
      </div>
    </div>

    <!-- Bottom Tab Bar -->
    <nav class="bottom-tab-bar">
      <svg width="0" height="0" style="position: absolute;">
        <defs>
          <linearGradient id="active-icon-gradient" x1="0%" y1="0%" x2="100%" y2="100%">
            <stop offset="0%" stop-color="#c183f0" />
            <stop offset="100%" stop-color="#8a53e6" />
          </linearGradient>
        </defs>
      </svg>
      <div class="tab-item active" data-tab="Chat">
        <svg viewBox="0 0 24 24"><path d="M12 2C6.477 2 2 6.03 2 11c0 2.84 1.503 5.37 3.856 7.02L4 22l4.28-1.564A10.61 10.61 0 0012 20c5.523 0 10-4.03 10-9s-4.477-9-10-9z"/></svg>
      </div>
      <div class="tab-item" data-tab="News">
        <svg viewBox="0 0 24 24"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 17.93c-3.95-.49-7-3.85-7-7.93 0-.62.08-1.21.21-1.79L9 15v1c0 1.1.9 2 2 2v1.93zm6.9-2.54c-.26-.81-1-1.39-1.9-1.39h-1v-3c0-.55-.45-1-1-1H8v-2h2c.55 0 1-.45 1-1V7h2c1.1 0 2-.9 2-2v-.41c2.93 1.19 5 4.06 5 7.41 0 2.08-.8 3.97-2.1 5.39z"/></svg>
      </div>
      <div class="tab-item" data-tab="Hub">
        <svg viewBox="0 0 24 24"><path d="M4 4h6v6H4zm0 10h6v6H4zm10 0h6v6h-6zm0-10h6v6h-6z"/></svg>
      </div>
      <div class="tab-item" data-tab="Vault">
        <!-- Changed to a solid folder icon for consistency with others -->
        <svg viewBox="0 0 24 24"><path d="M10 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V8c0-1.1-.9-2-2-2h-8l-2-2z"/></svg>
      </div>
      <div class="tab-item" data-tab="Settings">
        <svg viewBox="0 0 24 24"><path d="M19.14,12.94c0.04-0.3,0.06-0.61,0.06-0.94c0-0.32-0.02-0.64-0.06-0.94l2.03-1.58c0.18-0.14,0.23-0.41,0.12-0.61 l-1.92-3.32c-0.12-0.22-0.37-0.29-0.59-0.22l-2.39,0.96c-0.5-0.38-1.03-0.7-1.62-0.94L14.4,2.81c-0.04-0.24-0.24-0.41-0.48-0.41 h-3.84c-0.24,0-0.43,0.17-0.47,0.41L9.25,5.35C8.66,5.59,8.12,5.92,7.63,6.29L5.24,5.33c-0.22-0.08-0.47,0-0.59,0.22L2.73,8.87 C2.62,9.08,2.66,9.34,2.86,9.48l2.03,1.58C4.84,11.36,4.8,11.69,4.8,12s0.02,0.64,0.06,0.94l-2.03,1.58 c-0.18,0.14-0.23,0.41-0.12,0.61l1.92,3.32c0.12,0.22,0.37,0.29,0.59,0.22l2.39-0.96c0.5,0.38,1.03,0.7,1.62,0.94l0.36,2.54 c0.05,0.24,0.24,0.41,0.48,0.41h3.84c0.24,0,0.43-0.17,0.47-0.41l0.36-2.54c0.59-0.24,1.13-0.56,1.62-0.94l2.39,0.96 c0.22,0.08,0.47,0,0.59-0.22l1.92-3.32c0.12-0.22,0.07-0.49-0.12-0.61L19.14,12.94z M12,15.6c-1.98,0-3.6-1.62-3.6-3.6 s1.62-3.6,3.6-3.6s3.6,1.62,3.6,3.6S13.98,15.6,12,15.6z"/></svg>
      </div>
    </nav>
  `;

  // View Instances
  const chatView = new ChatView('router-view');
  try {
    await chatView.init();
  } catch (err) {
    console.error('Failed to initialize ChatView:', err);
    // Continue execution so tabs still work even if chat fails
  }
  window.chatView = chatView; // Export globally for IServ View to trigger PDF modal
  window.openPdfModal = chatView.openPdfModal ? chatView.openPdfModal.bind(chatView) : null;
  window.openArticleModal = chatView.openArticleModal ? chatView.openArticleModal.bind(chatView) : null;
  // We lazily import or instantiate SettingsView when needed, or just import it at top
  // To keep it simple, we'll instantiate it directly here but handle rendering in tab clicks.

  // --- TAB NAVIGATION LOGIC ---
  const tabItems = document.querySelectorAll('.tab-item');
  const inputCapsule = document.querySelector('.input-capsule-container');
  const routerView = document.getElementById('router-view');
  
  let activeView = null; // Track the currently active view to destroy it when switching

  tabItems.forEach(tab => {
    tab.addEventListener('click', async () => {
      const tabName = tab.getAttribute('data-tab');
      // Remove active class from all
      tabItems.forEach(t => t.classList.remove('active'));
      // Add active class to clicked
      tab.classList.add('active');
      
      await window.openView(tabName);
    });
  });

  const handleImportError = (e) => {
    if (e.message && e.message.includes('Failed to fetch dynamically imported module')) {
      // The app was updated and the old chunks are gone from the server.
      // Force a reload to fetch the new index.html and its new chunk map.
      routerView.innerHTML = `<div style="padding: 20px; color: white; display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%; text-align: center;">
        <div style="font-size: 40px; margin-bottom: 20px;">🔄</div>
        <div style="font-size: 18px; font-weight: 600; margin-bottom: 8px;">App wurde aktualisiert</div>
        <div style="font-size: 14px; opacity: 0.7;">Die neuste Version wird geladen...</div>
      </div>`;
      setTimeout(() => {
        window.location.reload(true);
      }, 1000);
    } else {
      routerView.innerHTML = `<div style="padding: 20px; color: red;">Error: ${e.message}</div>`;
    }
  };

  let currentOpenViewCounter = 0;

  window.openView = async (viewName, isSubView = false) => {
    currentOpenViewCounter++;
    const myCounter = currentOpenViewCounter;
    
    // Cleanup the previous view
    if (activeView && typeof activeView.destroy === 'function') {
      activeView.destroy();
    }
    
    // Safety fallback: always ensure chat is destroyed if we navigate away
    if (viewName !== 'Chat' && window.chatView) {
      window.chatView.destroy();
    }
    
    activeView = null;
    
    document.body.classList.toggle('in-chat-view', viewName === 'Chat');
    document.body.classList.toggle('in-hub-view', viewName === 'Hub');
    document.body.classList.toggle('in-news-view', viewName === 'News');
    document.body.classList.toggle('in-vault-view', viewName === 'Vault');
    
    routerView.classList.remove('view-enter-anim');
    routerView.classList.add('view-exit-anim');
    
    await new Promise(resolve => setTimeout(resolve, 150));
    
    // Abort if another view was opened while we were waiting
    if (currentOpenViewCounter !== myCounter) return;
    
    routerView.innerHTML = '';
    
    // Reset scroll position when switching main tabs
    if (!isSubView) {
      routerView.scrollTop = 0;
    }
    
    if (viewName === 'Chat') {
      inputCapsule.style.display = 'block';
      try {
        chatView.render();
        chatView.loadMessages();
      } catch(e) {
        handleImportError(e);
      }
      activeView = chatView;
    } 
    else if (viewName === 'Settings') {
      inputCapsule.style.display = 'none';
      try {
        const { SettingsView } = await import('./views/settings/settings-view.js');
        const settingsView = new SettingsView('router-view');
        settingsView.init();
        activeView = settingsView;
      } catch (e) {
        handleImportError(e);
      }
    }
    else if (viewName === 'Vault') {
      inputCapsule.style.display = 'none';
      try {
        const { DocumentsView } = await import('./views/documents/documents-view.js');
        const docsView = new DocumentsView('router-view');
        await docsView.init();
        activeView = docsView;
      } catch (e) {
        handleImportError(e);
      }
    }
    else if (viewName === 'Hub') {
      inputCapsule.style.display = 'none';
      try {
        const { HubView } = await import('./views/hub/hub-view.js');
        const hubView = new HubView('router-view');
        await hubView.init();
        activeView = hubView;
      } catch (e) {
        handleImportError(e);
      }
    }
    else if (viewName === 'News') {
      inputCapsule.style.display = 'none';
      try {
        const { NewsView } = await import('./views/news/news-view.js');
        const newsView = new NewsView('router-view');
        await newsView.init();
        activeView = newsView;
      } catch (e) {
        handleImportError(e);
      }
    }
    // Sub-views that can be opened from the Hub
    else if (viewName === 'Lernen') {
      inputCapsule.style.display = 'none';
      try {
        const { LearnView } = await import('./views/learn/learn-view.js');
        const learnView = new LearnView('router-view');
        await learnView.init();
        learnView.render();
        window.learnView = learnView; 
        activeView = learnView;
      } catch (e) {
        handleImportError(e);
      }
    }
    else if (viewName === 'Scan') {
      inputCapsule.style.display = 'none';
      try {
        const { ScanView } = await import('./views/scan/scan-view.js');
        const scanView = new ScanView('router-view');
        await scanView.init();
        scanView.render();
        activeView = scanView;
      } catch (e) {
        handleImportError(e);
      }
    }
    else if (viewName === 'Kalender') {
      inputCapsule.style.display = 'none';
      try {
        const { CalendarView } = await import('./views/calendar/calendar-view.js');
        const calView = new CalendarView('router-view');
        await calView.init();
        activeView = calView;
      } catch (e) {
        handleImportError(e);
      }
    }
    else if (viewName === 'IServ') {
      inputCapsule.style.display = 'none';
      try {
        const { IServView } = await import('./views/iserv/iserv-view.js');
        const iservView = new IServView('router-view');
        await iservView.init();
        activeView = iservView;
      } catch (e) {
        handleImportError(e);
      }
    }
    
    routerView.classList.remove('view-exit-anim');
    routerView.classList.add('view-enter-anim');
  };

  // Helper for Hub to open subviews without changing the active tab highlight
  window.openHubSubView = (viewName) => {
    window.openView(viewName, true);
  };

  // --- CHAT LOGIC ---
  const textarea = document.getElementById('chat-input');
  textarea.addEventListener('input', function() {
    this.style.height = 'auto';
    this.style.height = (this.scrollHeight < 120 ? this.scrollHeight : 120) + 'px';
  });

  // --- PLUS MENU & IMAGE UPLOAD LOGIC ---
  const plusMenuBtn = document.getElementById('plus-menu-btn');
  const plusPopoverMenu = document.getElementById('plus-popover-menu');
  const menuAttachBtn = document.getElementById('menu-attach-image-btn');
  const fileInput = document.getElementById('image-upload-input');
  const previewContainer = document.getElementById('image-preview-container');
  
  window.currentAttachments = []; // Max 20

  function renderAttachments() {
    previewContainer.innerHTML = '';
    if (window.currentAttachments.length === 0) {
      previewContainer.style.display = 'none';
      return;
    }
    
    previewContainer.style.display = 'flex';
    
    window.currentAttachments.forEach((att, index) => {
      const itemWrapper = document.createElement('div');
      itemWrapper.className = 'gpu-accelerated';
      itemWrapper.style = 'position: relative; display: inline-flex; align-items: center; justify-content: center; padding: 6px; background: rgba(255,255,255,0.03); border-radius: 14px; border: 1px solid rgba(255,255,255,0.08); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); box-shadow: 0 8px 32px rgba(0,0,0,0.2); width: 80px; height: 80px; flex-shrink: 0;';
      
      if (att.mimeType === 'application/pdf') {
        itemWrapper.innerHTML = `
          <div style="display: flex; flex-direction: column; align-items: center; justify-content: center; width: 100%; height: 100%; background: #eb4d4b; border-radius: 8px;">
            <svg viewBox="0 0 24 24" width="24" height="24" fill="none" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"></path><polyline points="14 2 14 8 20 8"></polyline><line x1="16" y1="13" x2="8" y2="13"></line><line x1="16" y1="17" x2="8" y2="17"></line><polyline points="10 9 9 9 8 9"></polyline></svg>
            <div style="font-size: 9px; color: white; margin-top: 4px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 90%;">${att.name}</div>
          </div>
        `;
      } else {
        itemWrapper.innerHTML = `
          <img src="${att.data}" style="width: 100%; height: 100%; object-fit: cover; border-radius: 8px; display: block;" />
        `;
      }
      
      const delBtn = document.createElement('button');
      delBtn.style = 'position: absolute; top: -6px; right: -6px; background: rgba(40,40,45,0.9); color: #fff; border: 1px solid rgba(255,255,255,0.15); border-radius: 50%; width: 22px; height: 22px; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 10px; padding: 0; box-shadow: 0 4px 12px rgba(0,0,0,0.4); z-index: 2;';
      delBtn.innerHTML = '✕';
      delBtn.onclick = () => {
        window.currentAttachments.splice(index, 1);
        renderAttachments();
      };
      
      itemWrapper.appendChild(delBtn);
      previewContainer.appendChild(itemWrapper);
    });
  }

  // Toggle plus menu
  if (plusMenuBtn && plusPopoverMenu) {
    plusMenuBtn.addEventListener('click', (e) => {
      e.stopPropagation();
      const isVisible = plusPopoverMenu.style.display === 'flex';
      plusPopoverMenu.style.display = isVisible ? 'none' : 'flex';
    });

    // Close when clicking outside
    document.addEventListener('click', (e) => {
      if (!plusPopoverMenu.contains(e.target) && !plusMenuBtn.contains(e.target)) {
        plusPopoverMenu.style.display = 'none';
      }
    });

    document.body.addEventListener('change', (e) => {
      if (e.target.id === 'deep-research-toggle') {
        const container = document.getElementById('deep-research-time-container');
        if(container) container.style.display = e.target.checked ? 'block' : 'none';
        const detectiveContainer = document.getElementById('detective-board-container');
        if(detectiveContainer) detectiveContainer.style.display = e.target.checked ? 'flex' : 'none';
      }
    });
  }

  if (menuAttachBtn) {
    menuAttachBtn.addEventListener('click', () => {
      if (plusPopoverMenu) plusPopoverMenu.style.display = 'none';
      fileInput.click();
    });
  }

  function handleImageFile(file) {
    if (!file || !file.type.startsWith('image/')) return;
    if (window.currentAttachments.length >= 20) {
      alert("Maximal 20 Anhänge erlaubt.");
      return;
    }
    
    const reader = new FileReader();
    reader.onload = (event) => {
      const img = new Image();
      img.onload = () => {
        const canvas = document.createElement('canvas');
        const MAX_DIM = 800;
        let width = img.width;
        let height = img.height;

        if (width > height && width > MAX_DIM) {
          height *= MAX_DIM / width;
          width = MAX_DIM;
        } else if (height > MAX_DIM) {
          width *= MAX_DIM / height;
          height = MAX_DIM;
        }

        canvas.width = width;
        canvas.height = height;
        const ctx = canvas.getContext('2d');
        ctx.drawImage(img, 0, 0, width, height);

        const dataUrl = canvas.toDataURL('image/jpeg', 0.7);
        window.currentAttachments.push({ mimeType: 'image/jpeg', data: dataUrl, name: file.name });
        renderAttachments();
      };
      img.src = event.target.result;
    };
    reader.readAsDataURL(file);
  }

  async function handlePdfFile(file) {
    if (window.currentAttachments.length >= 20) {
      alert("Maximal 20 Anhänge erlaubt.");
      return;
    }
    
    const reader = new FileReader();
    reader.onload = (event) => {
      window.currentAttachments.push({ mimeType: 'application/pdf', data: event.target.result, name: file.name });
      renderAttachments();
    };
    reader.readAsDataURL(file);
  }

  function clearImage() {
    window.currentAttachments = [];
    renderAttachments();
    fileInput.value = '';
    window.updateChatPlaceholder();
  }
  
  // Handle global errors gracefully
  window.addEventListener('unhandledrejection', event => {
    console.error('Unhandled promise rejection:', event.reason);
  });

  // --- File Permission UI Logic ---
  let activePermissionResolve = null;
  const permPopup = document.getElementById('file-permission-popup');
  const permText = document.getElementById('file-permission-text');
  const permAllow = document.getElementById('file-permission-allow');
  const permDeny = document.getElementById('file-permission-deny');

  window.addEventListener('request-file-permission', (e) => {
    const detail = e.detail;
    activePermissionResolve = detail.resolve;
    
    let actionText = 'lesen';
    if (detail.action === 'write') actionText = 'erstellen/überschreiben';
    if (detail.action === 'delete') actionText = 'löschen';
    
    permText.innerText = `Die KI möchte die Datei "${detail.path}" ${actionText}.`;
    permPopup.style.display = 'flex';
    
    // Haptic feedback to alert user
    if (window.navigator && window.navigator.vibrate) {
      window.navigator.vibrate(50);
    }
  });

  const closePermissionPopup = (allowed) => {
    permPopup.style.display = 'none';
    if (activePermissionResolve) {
      activePermissionResolve(allowed);
      activePermissionResolve = null;
    }
  };

  permAllow.addEventListener('click', () => closePermissionPopup(true));
  permDeny.addEventListener('click', () => closePermissionPopup(false));
  
  fileInput.addEventListener('change', (e) => {
    const files = Array.from(e.target.files);
    if (!files.length) return;
    
    files.forEach(file => {
      if (file.type === 'application/pdf') {
        handlePdfFile(file);
      } else {
        handleImageFile(file);
      }
    });
    
    // Clear the input so selecting the same files again works
    fileInput.value = '';
  });

  // Global Paste Event Listener for Images
  document.addEventListener('paste', (e) => {
    const items = (e.clipboardData || e.originalEvent.clipboardData).items;
    for (let index in items) {
      const item = items[index];
      if (item.kind === 'file') {
        const file = item.getAsFile();
        if (file) {
          if (file.type === 'application/pdf') {
             e.preventDefault();
             handlePdfFile(file);
             break;
          } else if (file.type.includes('image')) {
             e.preventDefault();
             handleImageFile(file);
             break;
          }
        }
      }
    }
  });

  // Handle Sending
  const sendBtn = document.getElementById('send-btn');
  
  const handleSend = async () => {
    if (chatView && chatView.isGenerating) {
      if (chatView.currentAbortController) {
        chatView.currentAbortController.abort();
      }
      return;
    }

    const text = textarea.value;
    const hasAttachments = window.currentAttachments && window.currentAttachments.length > 0;
    
    if (text.trim() || hasAttachments) {
      // Send button spin animation
      sendBtn.classList.add('sending');
      setTimeout(() => sendBtn.classList.remove('sending'), 600);
      
      textarea.value = '';
      textarea.style.height = 'auto';
      
      let finalMessage = text.trim();
      
      if (hasAttachments) {
        let attachStr = '';
        window.currentAttachments.forEach(att => {
          attachStr += `![${att.name}](${att.data})\n`;
        });
        finalMessage = `${attachStr}\n${finalMessage}`;
        clearImage();
      }
      
      // Check for API Key if using cloud models
      const currentModel = db.getSetting('model') || 'gemini-1.5-flash';
      
      if (currentModel.startsWith('gemini') && !db.getSetting('gemini_api_key')) {
        const key = await window.appPrompt("Bitte gib deinen Gemini API Key ein (wird lokal gespeichert):");
        if (key) db.setSetting('gemini_api_key', key.trim()); else return;
      } else if (currentModel.startsWith('groq') && !db.getSetting('groq_api_key')) {
        const key = await window.appPrompt("Bitte gib deinen Groq API Key ein (wird lokal gespeichert):");
        if (key) db.setSetting('groq_api_key', key.trim()); else return;
      } else if (currentModel.startsWith('openrouter') && !db.getSetting('openrouter_api_key')) {
        const key = await window.appPrompt("Bitte gib deinen OpenRouter API Key ein (wird lokal gespeichert):");
        if (key) db.setSetting('openrouter_api_key', key.trim()); else return;
      } else if (currentModel.startsWith('deepseek') && !db.getSetting('deepseek_api_key')) {
        const key = await window.appPrompt("Bitte gib deinen DeepSeek API Key ein (wird lokal gespeichert):");
        if (key) db.setSetting('deepseek_api_key', key.trim()); else return;
      }
      
      chatView.handleSend(finalMessage);
      
      // Auto-collapse in PDF mode after sending
      if (document.body.classList.contains('pdf-reading-mode')) {
        document.body.classList.add('pdf-input-collapsed');
      }
    }
  };

  sendBtn.addEventListener('click', handleSend);
  textarea.addEventListener('keydown', (e) => {
    if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
      e.preventDefault();
      handleSend();
    }
  });

  window.updateChatPlaceholder = function() {
    try {
      const model = db.getSetting('model') || 'gemini-1.5-flash';
      let aiName = "SchoolMind AI";
      let isLocal = false;
      
      if (model.includes('gemini') || model.includes('Gemini')) aiName = "Gemini";
      else if (model.includes('claude') || model.includes('Claude')) aiName = "Claude";
      else if (model.includes('qwen') || model.includes('Qwen')) aiName = "Qwen";
      else if (model.includes('llama') || model.includes('Llama')) aiName = "Llama";
      else if (model.includes('lyria') || model.includes('Lyria')) aiName = "Lyria";
      else if (model.includes('gemma') || model.includes('Gemma')) aiName = "Gemma";
      else if (model.includes('deepseek') || model.includes('DeepSeek')) aiName = "DeepSeek";
      else if (model.includes('mistral') || model.includes('codestral')) aiName = "Mistral";
      
      if (model.startsWith('ollama-') || model.includes('nano-')) isLocal = true;
      
      let userName = "";
      const useProfileStr = db.getSetting('use_profile');
      const useProfile = useProfileStr === null ? true : useProfileStr === 'true';
      
      if (useProfile) {
        try {
          const activeProfileRes = db.getActiveProfile();
          if (activeProfileRes && activeProfileRes.length > 0 && activeProfileRes[0].values.length > 0) {
            const row = activeProfileRes[0].values[0];
            const nameIndex = activeProfileRes[0].columns.indexOf('name');
            if (nameIndex !== -1 && row[nameIndex]) {
              userName = row[nameIndex];
            }
          }
        } catch (profileErr) {
          console.warn("Profile fetch error:", profileErr);
        }
      }
      
      let placeholder = `Nachricht an ${aiName}...`;
      if (userName) {
        placeholder = `Als ${userName} an ${aiName}...`;
      }
      if (isLocal) {
        placeholder = `(Lokal) ` + placeholder;
      }
      
      const chatInput = document.getElementById('chat-input');
      if (chatInput) {
        chatInput.placeholder = placeholder;
      }
    } catch (e) {
      const chatInput = document.getElementById('chat-input');
      if (chatInput) {
        if (e.message.includes('not ready')) {
          chatInput.placeholder = "Warte auf Datenbank...";
        } else {
          chatInput.placeholder = "ERROR: " + e.message;
        }
      }
    }
  };
  
  // Wait for DB to be ready before first update
  db.initPromise.then(() => window.updateChatPlaceholder());

  // --- Scroll to Bottom Button Logic ---
  const routerViewEl = document.getElementById('router-view');
  const scrollBtn = document.getElementById('scroll-to-bottom-btn');
  
  routerViewEl.addEventListener('scroll', (e) => {
    // Only show in chat view
    if (document.body.classList.contains('in-chat-view')) {
      const scrollContainer = document.getElementById('chat-scroll-area') || routerViewEl;
      if (e.target !== scrollContainer && e.target !== routerViewEl) return;
      
      const scrollHeight = scrollContainer.scrollHeight;
      const scrollTop = scrollContainer.scrollTop;
      const clientHeight = scrollContainer.clientHeight;
      
      // If user scrolled up by more than 80 lines (ca. 1000px)
      if (scrollHeight - scrollTop - clientHeight > 1000) {
        scrollBtn.style.display = 'flex';
        setTimeout(() => scrollBtn.style.opacity = '1', 10);
      } else {
        scrollBtn.style.opacity = '0';
        setTimeout(() => {
          if (scrollBtn.style.opacity === '0') scrollBtn.style.display = 'none';
        }, 200);
      }
    } else {
      scrollBtn.style.display = 'none';
    }
  }, true);

  scrollBtn.addEventListener('click', () => {
    const scrollContainer = document.getElementById('chat-scroll-area') || routerViewEl;
    scrollContainer.scrollTo({
      top: scrollContainer.scrollHeight,
      behavior: 'smooth'
    });
  });

  window.setGeneratingState = (isGen) => {
    const icon = document.getElementById('scroll-arrow-icon');
    const ind = document.getElementById('scroll-typing-indicator');
    if (icon && ind) {
      if (isGen) {
        icon.style.display = 'none';
        ind.style.display = 'flex';
      } else {
        icon.style.display = 'block';
        ind.style.display = 'none';
      }
    }
  };


   // Extract and Wrap Words Helper for TTS
  window.extractAndWrapText = (element) => {
    // If already wrapped, just return the text
    if (element.hasAttribute('data-words-wrapped')) {
      return element.getAttribute('data-words-wrapped-text');
    }
    
    const walker = document.createTreeWalker(element, NodeFilter.SHOW_TEXT, null, false);
    const nodes = [];
    while (walker.nextNode()) nodes.push(walker.currentNode);
    
    let wordIndex = 0;
    let fullTextParts = [];
    
    nodes.forEach(node => {
      if (node.nodeValue.trim() === '') {
        fullTextParts.push(node.nodeValue);
        return;
      }
      const parts = node.nodeValue.split(/(\s+)/);
      const fragment = document.createDocumentFragment();
      parts.forEach(part => {
        if (part.trim().length > 0) {
          const span = document.createElement('span');
          span.className = 'tts-word';
          span.dataset.ttsIndex = wordIndex++;
          span.textContent = part;
          fragment.appendChild(span);
          fullTextParts.push(part);
        } else {
          fragment.appendChild(document.createTextNode(part));
          fullTextParts.push(part);
        }
      });
      node.parentNode.replaceChild(fragment, node);
    });
    
    const finalString = fullTextParts.join('');
    element.setAttribute('data-words-wrapped', wordIndex);
    element.setAttribute('data-words-wrapped-text', finalString);
    return finalString;
  };

  // Play TTS Message from a DOM Element
  window.playTTSMessage = (btn, rawText) => {
    // The button is inside .ai-msg-actions, which is a sibling of .chat-bubble-ai
    const actionsDiv = btn.closest('.ai-msg-actions');
    const wrapper = actionsDiv ? actionsDiv.parentElement : null;
    const container = wrapper ? wrapper.querySelector('.chat-bubble-ai') : null;
    
    if (container) {
      const textToPlay = window.extractAndWrapText(container);
      window.ttsService.play(textToPlay, true);
    } else {
      window.ttsService.play(rawText, false);
    }
  };

  // --- TTS Player Logic ---
  const ttsPlayer = document.getElementById('tts-player-container');
  const ttsPlayBtn = document.getElementById('tts-play-btn');
  const ttsPlayIcon = document.getElementById('tts-play-icon');
  const ttsPrevBtn = document.getElementById('tts-prev-btn');
  const ttsNextBtn = document.getElementById('tts-next-btn');
  const ttsRateBtn = document.getElementById('tts-rate-btn');
  const ttsCcBtn = document.getElementById('tts-cc-btn');
  let ttsCcEnabled = true;

  if (ttsPlayer) {
    // CC Button logic
    ttsCcBtn.addEventListener('click', () => {
      ttsCcEnabled = !ttsCcEnabled;
      if (ttsCcEnabled) {
        ttsCcBtn.classList.add('active');
        ttsCcBtn.style.color = 'var(--primary)';
      } else {
        ttsCcBtn.classList.remove('active');
        ttsCcBtn.style.color = 'var(--text-secondary)';
        // Remove active highlights
        document.querySelectorAll('.tts-word.active').forEach(el => {
          el.classList.remove('active');
          el.style.background = 'transparent';
          el.style.color = 'inherit';
        });
      }
    });

    ttsService.onStateChange = (state) => {
      const scrollBtn = document.getElementById('scroll-to-bottom-btn');
      
      // Update word highlights based on progress
      if (ttsCcEnabled && state.currentWordIndex !== undefined) {
        document.querySelectorAll('.tts-word.active').forEach(el => el.classList.remove('active'));
        const activeWord = document.querySelector(`.tts-word[data-tts-index="${state.currentWordIndex}"]`);
        if (activeWord) {
          activeWord.classList.add('active');
          
          if (!window.ttsScrollTimeout) {
            window.ttsScrollTimeout = setTimeout(() => {
              const scrollContainer = activeWord.closest('#chat-scroll-area') || activeWord.closest('.view-container');
              if (scrollContainer) {
                const containerRect = scrollContainer.getBoundingClientRect();
                const wordRect = activeWord.getBoundingClientRect();
                
                const isOutsideMiddle = wordRect.top < containerRect.top + containerRect.height * 0.3 || 
                                        wordRect.bottom > containerRect.bottom - containerRect.height * 0.3;
                
                if (isOutsideMiddle) {
                  const scrollOffset = wordRect.top - containerRect.top + scrollContainer.scrollTop - (containerRect.height / 2);
                  scrollContainer.scrollTo({ top: scrollOffset, behavior: 'smooth' });
                }
              }
              window.ttsScrollTimeout = null;
            }, 300); // Small debounce to prevent jitter
          }
        }
      }

      if (state.hasActiveSession) {
        ttsPlayer.classList.remove('collapsed');
        if (scrollBtn) scrollBtn.style.top = '-130px';
      } else {
        ttsPlayer.classList.add('collapsed');
        if (scrollBtn) scrollBtn.style.top = '-46px';
      }
      
      if (state.isLoading) {
        ttsPlayer.classList.add('playing');
        ttsPlayIcon.innerHTML = '<circle cx="12" cy="12" r="8" stroke="currentColor" stroke-width="3" fill="none" stroke-dasharray="25 25" stroke-linecap="round"><animateTransform attributeName="transform" type="rotate" from="0 12 12" to="360 12 12" dur="1s" repeatCount="indefinite"/></circle>';
        ttsPlayBtn.style.opacity = '0.5';
      } else if (state.isPlaying) {
        ttsPlayer.classList.add('playing');
        ttsPlayIcon.innerHTML = '<rect x="6" y="4" width="4" height="16"></rect><rect x="14" y="4" width="4" height="16"></rect>';
        ttsPlayBtn.style.opacity = '1';
      } else {
        ttsPlayer.classList.remove('playing');
        ttsPlayIcon.innerHTML = '<polygon points="7 3 21 12 7 21 7 3"></polygon>';
        ttsPlayBtn.style.opacity = '1';
      }
      
      ttsRateBtn.innerText = state.rate + 'x';
    };
    
    ttsPlayBtn.addEventListener('click', () => ttsService.togglePlayPause());
    ttsPrevBtn.addEventListener('click', () => ttsService.prev());
    ttsNextBtn.addEventListener('click', () => ttsService.next());
    ttsRateBtn.addEventListener('click', () => ttsService.cycleRate());
    
    // Swipe down to close
    let touchStartY = 0;
    let touchEndY = 0;
    ttsPlayer.addEventListener('touchstart', (e) => {
      touchStartY = e.touches[0].clientY;
      touchEndY = touchStartY;
      ttsPlayer.style.transition = 'none'; // Instant drag
    });
    ttsPlayer.addEventListener('touchmove', (e) => {
      touchEndY = e.touches[0].clientY;
      const deltaY = touchEndY - touchStartY;
      if (deltaY > 0) {
        ttsPlayer.style.transform = `translateY(${deltaY}px)`;
        // Smoothly fade out as it reaches the 70px threshold
        const dragOpacity = Math.max(0, 1 - (deltaY / 70));
        ttsPlayer.style.opacity = dragOpacity;
      }
    });
    ttsPlayer.addEventListener('touchend', () => {
      ttsPlayer.style.transition = ''; // Restore CSS transition
      ttsPlayer.style.transform = '';  // Restore CSS transform
      ttsPlayer.style.opacity = '';    // Restore CSS opacity
      if (touchEndY > touchStartY + 70) {
        // Swiped down deliberately
        ttsService.stop();
      }
    });
  }
};

document.addEventListener('DOMContentLoaded', () => {
  initApp().catch(err => {
    console.error("Critical app initialization error:", err);
    if (err && err.message && err.message.includes('no such table')) {
      alert("Die lokale Datenbank ist beschädigt. Sie wird nun zurückgesetzt, um die App wiederherzustellen.");
      localStorage.removeItem('schoolmind_db');
      window.location.reload();
    }
  });

  // Also catch if it was launched directly and stored in window
  if (window.pendingAppShortcut === 'add_vocabulary') {
    showVocabularyModal();
    window.pendingAppShortcut = null;
  }
});