update

frontend/src/components/TopicDetail.vue

@@ -1,6 +1,14 @@
 <script setup>
-import { computed } from 'vue'
-import { htmlUrl } from '../api.js'
+import { computed, ref, nextTick } from 'vue'
+import { marked } from 'marked'
+import DOMPurify from 'dompurify'
+import { htmlUrl, chatGuide } from '../api.js'
+
+marked.setOptions({ breaks: true, gfm: true })
+
+function renderMarkdown(text) {
+  return DOMPurify.sanitize(marked.parse(text || ''))
+}
 
 const props = defineProps({
   previewGuide: { type: Object, default: null },
@@ -9,25 +17,142 @@ const props = defineProps({
 const LANDSCAPE_FORMATS = ['OnePager', 'Cheatsheet']
 const isLandscape = computed(() => LANDSCAPE_FORMATS.includes(props.previewGuide?.format))
 
+const frameEl = ref(null)
+
 function injectPadding(e) {
   if (isLandscape.value) return
   const doc = e.target.contentDocument
   if (!doc) return
   const style = doc.createElement('style')
-  style.textContent = '@media screen { body { padding: 2.5rem 3rem; } }'
+  style.textContent = `@media screen {
+    html { background: #f0f1f4; }
+    body {
+      zoom: 1.15;
+      max-width: 1000px;
+      margin: 0 auto;
+      padding: 2.5rem 3.5rem;
+      background: #fff;
+      box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
+    }
+  }`
   doc.head?.appendChild(style)
 }
+
+// --- Chat ---
+const chatOpen = ref(false)
+const messages = ref([])
+const input = ref('')
+const loading = ref(false)
+const messagesEl = ref(null)
+const inputEl = ref(null)
+
+function openChat() {
+  chatOpen.value = true
+}
+
+function closeChat() {
+  chatOpen.value = false
+  messages.value = []
+  input.value = ''
+}
+
+function extractContext() {
+  try {
+    const doc = frameEl.value?.contentDocument
+    if (!doc) return { section: '', outline: '' }
+    const headings = Array.from(doc.querySelectorAll('h1, h2, h3'))
+    if (!headings.length) return { section: '', outline: '' }
+
+    const outline = headings.map((h) => h.innerText.trim()).filter(Boolean).join('\n')
+
+    // Aktuelle Überschrift = letzte, die oben im sichtbaren Bereich oder darüber liegt
+    let current = headings[0]
+    for (const h of headings) {
+      if (h.getBoundingClientRect().top <= 100) current = h
+      else break
+    }
+    const level = Number(current.tagName[1])
+    const idx = headings.indexOf(current)
+    let end = null
+    for (let i = idx + 1; i < headings.length; i++) {
+      if (Number(headings[i].tagName[1]) <= level) { end = headings[i]; break }
+    }
+    const range = doc.createRange()
+    range.setStartBefore(current)
+    if (end) range.setEndBefore(end)
+    else range.setEndAfter(doc.body.lastElementChild || doc.body)
+    const section = range.toString().trim().slice(0, 18000)
+    return { section, outline: outline.slice(0, 7000) }
+  } catch {
+    return { section: '', outline: '' }
+  }
+}
+
+async function scrollToBottom() {
+  await nextTick()
+  if (messagesEl.value) messagesEl.value.scrollTop = messagesEl.value.scrollHeight
+}
+
+async function send() {
+  const text = input.value.trim()
+  if (!text || loading.value || !props.previewGuide) return
+  messages.value.push({ role: 'user', content: text })
+  input.value = ''
+  loading.value = true
+  scrollToBottom()
+  try {
+    const { section, outline } = extractContext()
+    const res = await chatGuide(props.previewGuide.id, {
+      section,
+      outline,
+      messages: messages.value,
+    })
+    messages.value.push({ role: 'assistant', content: res.reply || '…' })
+  } catch {
+    messages.value.push({ role: 'assistant', content: 'Fehler bei der Anfrage.' })
+  } finally {
+    loading.value = false
+    scrollToBottom()
+    nextTick(() => inputEl.value?.focus())
+  }
+}
 </script>
 
 <template>
   <div class="detail">
-    <div class="preview" v-if="previewGuide">
-      <iframe :src="htmlUrl(previewGuide.id)" class="preview-frame" :class="{ landscape: isLandscape }" title="Guide-Vorschau" @load="injectPadding"></iframe>
+    <div class="preview" :class="{ landscape: isLandscape }" v-if="previewGuide">
+      <iframe ref="frameEl" :src="htmlUrl(previewGuide.id)" class="preview-frame" :class="{ landscape: isLandscape }" title="Guide-Vorschau" @load="injectPadding"></iframe>
     </div>
 
     <div class="empty-preview" v-else>
       <p>Guide-Format anklicken um zu generieren oder Vorschau zu öffnen.</p>
     </div>
+
+    <button v-if="previewGuide && !chatOpen" class="chat-fab" title="Fragen zum Guide" @click="openChat">💬</button>
+
+    <div v-if="previewGuide && chatOpen" class="chat-panel">
+      <header class="chat-header">
+        <span>Fragen zum Guide</span>
+        <button class="chat-close" title="Chat beenden" @click="closeChat">×</button>
+      </header>
+      <div ref="messagesEl" class="chat-messages">
+        <p v-if="!messages.length" class="chat-hint">Stell eine Frage zum aktuellen Abschnitt.</p>
+        <template v-for="(m, i) in messages" :key="i">
+          <div v-if="m.role === 'assistant'" class="chat-msg assistant markdown" v-html="renderMarkdown(m.content)"></div>
+          <div v-else class="chat-msg user">{{ m.content }}</div>
+        </template>
+        <div v-if="loading" class="chat-msg assistant chat-typing">Denkt…</div>
+      </div>
+      <div class="chat-input">
+        <textarea
+          ref="inputEl"
+          v-model="input"
+          placeholder="Frage stellen…"
+          @keydown.enter.exact.prevent="send"
+        ></textarea>
+        <button :disabled="!input.trim() || loading" @click="send">➤</button>
+      </div>
+    </div>
   </div>
 </template>
 
@@ -42,10 +167,13 @@ function injectPadding(e) {
   display: flex;
   flex-direction: column;
   align-items: center;
-  padding: 2rem;
   background: #f0f1f4;
 }
 
+.preview.landscape {
+  padding: 2rem;
+}
+
 .preview-header {
   display: flex;
   justify-content: space-between;
@@ -76,15 +204,14 @@ function injectPadding(e) {
 
 .preview-frame {
   width: 100%;
-  max-width: 900px;
   flex: 1;
   border: none;
   background: #fff;
-  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
 }
 
 .preview-frame.landscape {
   max-width: 1180px;
+  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
 }
 
 .empty-preview {
@@ -94,4 +221,209 @@ function injectPadding(e) {
   height: 100%;
   color: #5a6470;
 }
+
+.chat-fab {
+  position: fixed;
+  right: 1.5rem;
+  bottom: 1.5rem;
+  width: 52px;
+  height: 52px;
+  border: none;
+  border-radius: 50%;
+  background: #6366f1;
+  color: #fff;
+  font-size: 1.4rem;
+  cursor: pointer;
+  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
+  z-index: 20;
+}
+
+.chat-fab:hover {
+  background: #4f46e5;
+}
+
+.chat-panel {
+  position: fixed;
+  right: 1.5rem;
+  bottom: 1.5rem;
+  width: 360px;
+  height: 500px;
+  max-height: calc(100vh - 3rem);
+  display: flex;
+  flex-direction: column;
+  background: #fff;
+  border: 1px solid #e2e5e9;
+  border-radius: 12px;
+  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
+  z-index: 20;
+  overflow: hidden;
+}
+
+.chat-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0.6rem 0.9rem;
+  background: #6366f1;
+  color: #fff;
+  font-weight: 600;
+  font-size: 0.9rem;
+}
+
+.chat-close {
+  border: none;
+  background: none;
+  color: #fff;
+  font-size: 1.4rem;
+  line-height: 1;
+  cursor: pointer;
+  padding: 0 4px;
+}
+
+.chat-messages {
+  flex: 1;
+  overflow-y: auto;
+  padding: 0.9rem;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.chat-hint {
+  color: #9aa3af;
+  font-size: 0.82rem;
+  text-align: center;
+  margin-top: 1rem;
+}
+
+.chat-msg {
+  max-width: 85%;
+  padding: 7px 11px;
+  border-radius: 12px;
+  font-size: 0.85rem;
+  line-height: 1.4;
+  white-space: pre-wrap;
+  word-break: break-word;
+}
+
+.chat-msg.user {
+  align-self: flex-end;
+  background: #6366f1;
+  color: #fff;
+  border-bottom-right-radius: 3px;
+}
+
+.chat-msg.assistant {
+  align-self: flex-start;
+  background: #f1f3f7;
+  color: #1a1a1a;
+  border-bottom-left-radius: 3px;
+}
+
+.chat-typing {
+  color: #9aa3af;
+  font-style: italic;
+}
+
+.chat-msg.markdown :deep(p) {
+  margin: 0 0 0.5em;
+}
+
+.chat-msg.markdown :deep(p:last-child) {
+  margin-bottom: 0;
+}
+
+.chat-msg.markdown :deep(ul),
+.chat-msg.markdown :deep(ol) {
+  margin: 0.3em 0;
+  padding-left: 1.2em;
+}
+
+.chat-msg.markdown :deep(li) {
+  margin: 0.15em 0;
+}
+
+.chat-msg.markdown :deep(code) {
+  background: #e4e7ee;
+  padding: 1px 4px;
+  border-radius: 4px;
+  font-family: "SF Mono", Consolas, monospace;
+  font-size: 0.8em;
+}
+
+.chat-msg.markdown :deep(pre) {
+  background: #1e2330;
+  color: #e6e8ee;
+  padding: 8px 10px;
+  border-radius: 8px;
+  overflow-x: auto;
+  margin: 0.5em 0;
+}
+
+.chat-msg.markdown :deep(pre code) {
+  background: none;
+  padding: 0;
+  color: inherit;
+  font-size: 0.78em;
+}
+
+.chat-msg.markdown :deep(h1),
+.chat-msg.markdown :deep(h2),
+.chat-msg.markdown :deep(h3) {
+  font-size: 0.95em;
+  margin: 0.4em 0 0.2em;
+}
+
+.chat-msg.markdown :deep(a) {
+  color: #4f46e5;
+}
+
+.chat-msg.markdown :deep(table) {
+  border-collapse: collapse;
+  font-size: 0.95em;
+}
+
+.chat-msg.markdown :deep(th),
+.chat-msg.markdown :deep(td) {
+  border: 1px solid #d8dde3;
+  padding: 2px 6px;
+}
+
+.chat-input {
+  display: flex;
+  gap: 6px;
+  padding: 0.6rem;
+  border-top: 1px solid #e2e5e9;
+}
+
+.chat-input textarea {
+  flex: 1;
+  resize: none;
+  height: 38px;
+  padding: 8px 10px;
+  border: 1px solid #d8dde3;
+  border-radius: 8px;
+  font-size: 0.85rem;
+  font-family: inherit;
+  outline: none;
+}
+
+.chat-input textarea:focus {
+  border-color: #6366f1;
+}
+
+.chat-input button {
+  width: 38px;
+  border: none;
+  border-radius: 8px;
+  background: #6366f1;
+  color: #fff;
+  font-size: 1rem;
+  cursor: pointer;
+}
+
+.chat-input button:disabled {
+  opacity: 0.4;
+  cursor: not-allowed;
+}
 </style>