diff --git a/front/src/App.tsx b/front/src/App.tsx
index 3033c57..96633ca 100644
--- a/front/src/App.tsx
+++ b/front/src/App.tsx
@@ -19,7 +19,6 @@ import AgentManagement from './pages/aiStudio/agents/AgentManagement'
 import AgentEdit from './pages/aiStudio/agents/AgentEdit.tsx'
 import ModelManagement from './pages/aiStudio/models/ModelManagement'
 import ChapterPrepLayout from './pages/aiStudio/chapter/prep/ChapterPrepLayout'
-import ConsistencyStep from './pages/aiStudio/chapter/prep/steps/ConsistencyStep'
 import DivideStep from './pages/aiStudio/chapter/prep/steps/DivideStep'
 import ExtractProjectStep from './pages/aiStudio/chapter/prep/steps/ExtractProjectStep'
 import { ChapterShotsPage } from './pages/aiStudio/shots/ChapterShotsPage'
@@ -36,8 +35,8 @@ const App: React.FC = () => {
           <Route path="projects/:projectId" element={<ProjectWorkbench />} />
           <Route path="projects/:projectId/roles/:characterId/edit" element={<RoleDetailPage />} />
           <Route path="projects/:projectId/chapters/:chapterId/prep" element={<ChapterPrepLayout />}>
-            <Route index element={<Navigate to="consistency" replace />} />
-            <Route path="consistency" element={<ConsistencyStep />} />
+            <Route index element={<Navigate to="divide" replace />} />
+            <Route path="consistency" element={<Navigate to="../divide" replace />} />
             <Route path="divide" element={<DivideStep />} />
             <Route path="extract" element={<ExtractProjectStep />} />
           </Route>
diff --git a/front/src/pages/aiStudio/chapter/components/ChapterRawTextEditorModal.tsx b/front/src/pages/aiStudio/chapter/components/ChapterRawTextEditorModal.tsx
index 4c667dc..24e784e 100644
--- a/front/src/pages/aiStudio/chapter/components/ChapterRawTextEditorModal.tsx
+++ b/front/src/pages/aiStudio/chapter/components/ChapterRawTextEditorModal.tsx
@@ -1,5 +1,5 @@
 import { useEffect, useMemo, useState } from 'react'
-import { Button, Collapse, Input, Modal, Space, Spin, Tag, message } from 'antd'
+import { Button, Card, Collapse, Empty, Input, List, Modal, Space, Spin, Tag, message } from 'antd'
 import {
   DiffOutlined,
   FileTextOutlined,
@@ -8,7 +8,8 @@ import {
   SaveOutlined,
   ThunderboltOutlined,
 } from '@ant-design/icons'
-import { StudioChaptersService } from '../../../../services/generated'
+import { ScriptProcessingService, StudioChaptersService } from '../../../../services/generated'
+import type { ScriptConsistencyCheckResult } from '../../../../services/generated'
 
 type EditorMode = 'raw' | 'condensed' | 'compare'
 
@@ -33,17 +34,27 @@ export function ChapterRawTextEditorModal({
   const [loading, setLoading] = useState(false)
   const [saving, setSaving] = useState(false)
   const [extracting, setExtracting] = useState(false)
+  const [checkingConsistency, setCheckingConsistency] = useState(false)
+  const [optimizingScript, setOptimizingScript] = useState(false)
   const [historyOpen, setHistoryOpen] = useState(false)
 
   const [mode, setMode] = useState<EditorMode>('raw')
   const [rawText, setRawText] = useState('')
   const [condensedText, setCondensedText] = useState('')
+  const [savedRawText, setSavedRawText] = useState('')
+  const [savedCondensedText, setSavedCondensedText] = useState('')
   const [editorText, setEditorText] = useState('')
   const [compareRaw, setCompareRaw] = useState('')
   const [compareCondensed, setCompareCondensed] = useState('')
+  const [consistencyResult, setConsistencyResult] = useState<ScriptConsistencyCheckResult | null>(null)
 
   const plainWordCount = useMemo(() => editorText.trim().length, [editorText])
   const paragraphCount = useMemo(() => editorText.split(/\n\s*\n/).filter((p) => p.trim()).length, [editorText])
+  const actionsLoading = extracting || checkingConsistency || optimizingScript
+  const consistencyIssues = useMemo(() => {
+    const list = (consistencyResult?.issues as any[] | undefined) ?? []
+    return Array.isArray(list) ? list : []
+  }, [consistencyResult])
 
   useEffect(() => {
     if (!open) return
@@ -56,10 +67,13 @@ export function ChapterRawTextEditorModal({
         const nextCondensed = data?.condensed_text ?? ''
         setRawText(nextRaw)
         setCondensedText(nextCondensed)
+        setSavedRawText(nextRaw)
+        setSavedCondensedText(nextCondensed)
         setMode('raw')
         setEditorText(nextRaw)
         setCompareRaw(nextRaw)
         setCompareCondensed(nextCondensed)
+        setConsistencyResult(null)
       })
       .catch(() => {
         message.error('加载章节失败')
@@ -74,9 +88,16 @@ export function ChapterRawTextEditorModal({
     }
     setExtracting(true)
     try {
-      // TODO: 智能精简接口未接入，后续在此替换为真实接口调用，并将返回结果写入 condensedText
-      await new Promise((r) => setTimeout(r, 500))
-      const simplified = '已精简'
+      const res = await ScriptProcessingService.simplifyScriptApiV1ScriptProcessingSimplifyScriptPost({
+        requestBody: {
+          script_text: rawText,
+        },
+      })
+      const simplified = res.data?.simplified_script_text?.trim() ?? ''
+      if (!simplified) {
+        message.error('智能精简失败：未返回有效内容')
+        return
+      }
       setCondensedText(simplified)
       if (mode === 'compare') {
         // 对比模式下不切换编辑区：只更新右侧精简内容输入框
@@ -86,11 +107,75 @@ export function ChapterRawTextEditorModal({
         setEditorText(simplified)
       }
       message.success('智能精简完成')
+    } catch {
+      message.error('智能精简失败')
     } finally {
       setExtracting(false)
     }
   }
 
+  const handleCheckConsistency = async () => {
+    const scriptText = rawText.trim()
+    if (!scriptText) {
+      message.warning('请先输入原文')
+      return
+    }
+    setCheckingConsistency(true)
+    try {
+      const res = await ScriptProcessingService.checkConsistencyApiV1ScriptProcessingCheckConsistencyPost({
+        requestBody: { script_text: scriptText },
+      })
+      const data = res.data
+      if (!data) {
+        message.error(res.message || '一致性检查失败')
+        return
+      }
+      setConsistencyResult(data)
+      if (data.has_issues) message.warning(`发现 ${data.issues?.length ?? 0} 个角色混淆问题`)
+      else message.success('未发现角色混淆问题')
+    } catch (e: any) {
+      message.error(e?.message || '一致性检查失败')
+    } finally {
+      setCheckingConsistency(false)
+    }
+  }
+
+  const handleOneClickOptimize = async () => {
+    const scriptText = rawText.trim()
+    if (!scriptText) {
+      message.warning('请先输入原文')
+      return
+    }
+    if (!consistencyResult) {
+      message.info('请先进行角色混淆检查')
+      return
+    }
+    setOptimizingScript(true)
+    try {
+      const res = await ScriptProcessingService.optimizeScriptApiV1ScriptProcessingOptimizeScriptPost({
+        requestBody: {
+          script_text: scriptText,
+          consistency: consistencyResult as any,
+        },
+      })
+      const optimized = res.data?.optimized_script_text?.trim() ?? ''
+      if (!optimized) {
+        message.error(res.message || '一键优化失败')
+        return
+      }
+      // 优化后回写到主输入区（以原文视图承载）
+      setRawText(optimized)
+      setEditorText(optimized)
+      setMode('raw')
+      setCompareRaw(optimized)
+      message.success('一键优化完成')
+    } catch (e: any) {
+      message.error(e?.message || '一键优化失败')
+    } finally {
+      setOptimizingScript(false)
+    }
+  }
+
   const handleBackToRaw = () => {
     setMode('raw')
     setEditorText(rawText)
@@ -105,8 +190,8 @@ export function ChapterRawTextEditorModal({
     setEditorText(condensedText)
   }
 
-  const handleSave = async () => {
-    if (!chapterId) return
+  const handleSave = async (): Promise<boolean> => {
+    if (!chapterId) return false
     setSaving(true)
     try {
       if (mode === 'raw') {
@@ -115,9 +200,10 @@ export function ChapterRawTextEditorModal({
           requestBody: { raw_text: editorText },
         })
         setRawText(editorText)
+        setSavedRawText(editorText)
         onSaved?.({ rawText: editorText })
         message.success('原文已保存')
-        return
+        return true
       }
 
       if (mode === 'condensed') {
@@ -126,9 +212,10 @@ export function ChapterRawTextEditorModal({
           requestBody: { condensed_text: editorText },
         })
         setCondensedText(editorText)
+        setSavedCondensedText(editorText)
         onSaved?.({ condensedText: editorText })
         message.success('精简内容已保存')
-        return
+        return true
       }
 
       await StudioChaptersService.updateChapterApiV1StudioChaptersChapterIdPatch({
@@ -137,15 +224,46 @@ export function ChapterRawTextEditorModal({
       })
       setRawText(compareRaw)
       setCondensedText(compareCondensed)
+      setSavedRawText(compareRaw)
+      setSavedCondensedText(compareCondensed)
       onSaved?.({ rawText: compareRaw, condensedText: compareCondensed })
       message.success('已保存')
+      return true
     } catch {
       message.error('保存失败')
+      return false
     } finally {
       setSaving(false)
     }
   }
 
+  const hasUnsavedChanges = useMemo(() => {
+    if (mode === 'compare') return compareRaw !== savedRawText || compareCondensed !== savedCondensedText
+    if (mode === 'raw') return editorText !== savedRawText
+    return editorText !== savedCondensedText
+  }, [compareCondensed, compareRaw, editorText, mode, savedCondensedText, savedRawText])
+
+  const handleRequestClose = () => {
+    if (actionsLoading) return
+    if (!hasUnsavedChanges) {
+      onClose()
+      return
+    }
+    Modal.confirm({
+      title: '检测到未保存变更',
+      content: '文本输入区有未保存修改，关闭前请选择操作。',
+      okText: '保存',
+      cancelText: '忽略',
+      onOk: async () => {
+        const ok = await handleSave()
+        if (ok) onClose()
+      },
+      onCancel: () => {
+        onClose()
+      },
+    })
+  }
+
   const mockHistory: HistoryItem[] = useMemo(
     () => [
       {
@@ -176,26 +294,37 @@ export function ChapterRawTextEditorModal({
               <Tag color="default">{paragraphCount} 段</Tag>
             </div>
             <Space size="small">
-              <Button size="small" type="primary" icon={<SaveOutlined />} loading={saving} onClick={() => void handleSave()}>
+              <Button size="small" type="primary" icon={<SaveOutlined />} loading={actionsLoading || saving} disabled={actionsLoading} onClick={() => void handleSave()}>
                 保存
               </Button>
+              <Button
+                size="small"
+                icon={<ReloadOutlined />}
+                loading={actionsLoading}
+                disabled={actionsLoading}
+                onClick={() => void handleCheckConsistency()}
+              >
+                角色混淆检查
+              </Button>
               <Button
                 size="small"
                 icon={<ThunderboltOutlined />}
-                loading={extracting}
+                loading={actionsLoading}
+                disabled={actionsLoading}
                 onClick={() => void handleSmartSimplify()}
               >
                 智能精简
               </Button>
               {mode === 'condensed' ? (
-                <Button size="small" icon={<ReloadOutlined />} onClick={handleBackToRaw}>
+                <Button size="small" icon={<ReloadOutlined />} loading={actionsLoading} disabled={actionsLoading} onClick={handleBackToRaw}>
                   回到原文
                 </Button>
               ) : (
                 <Button
                   size="small"
                   icon={<ReloadOutlined />}
-                  disabled={!condensedText.trim()}
+                  loading={actionsLoading}
+                  disabled={actionsLoading || !condensedText.trim()}
                   onClick={handleViewCondensed}
                 >
                   查看精简
@@ -204,6 +333,8 @@ export function ChapterRawTextEditorModal({
               <Button
                 size="small"
                 icon={<DiffOutlined />}
+                loading={actionsLoading}
+                disabled={actionsLoading}
                 type={mode === 'compare' ? 'primary' : 'default'}
                 onClick={() => {
                   if (mode === 'compare') {
@@ -218,21 +349,26 @@ export function ChapterRawTextEditorModal({
               >
                 对比模式
               </Button>
-              <Button size="small" icon={<HistoryOutlined />} onClick={() => setHistoryOpen(true)}>
+              <Button size="small" icon={<HistoryOutlined />} loading={actionsLoading} disabled={actionsLoading} onClick={() => setHistoryOpen(true)}>
                 版本历史
               </Button>
             </Space>
           </div>
         }
         open={open}
-        onCancel={onClose}
+        onCancel={() => {
+          handleRequestClose()
+        }}
         width={900}
         footer={
-          <Button type="primary" onClick={onClose}>
+          <Button type="primary" loading={actionsLoading} disabled={actionsLoading} onClick={handleRequestClose}>
             关闭
           </Button>
         }
-        styles={{ body: { maxHeight: '70vh', overflow: 'auto', paddingTop: 12 } }}
+        styles={{
+          header: { paddingRight: 48 },
+          body: { maxHeight: '70vh', overflow: 'auto', paddingTop: 12 },
+        }}
       >
         {loading ? (
           <div className="flex justify-center items-center py-10">
@@ -246,6 +382,7 @@ export function ChapterRawTextEditorModal({
                 value={compareRaw}
                 onChange={(e) => setCompareRaw(e.target.value)}
                 rows={14}
+                disabled={actionsLoading}
                 style={{ resize: 'none', fontFamily: 'ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace' }}
               />
             </div>
@@ -255,23 +392,85 @@ export function ChapterRawTextEditorModal({
                 value={compareCondensed}
                 onChange={(e) => setCompareCondensed(e.target.value)}
                 rows={14}
+                disabled={actionsLoading}
                 style={{ resize: 'none', fontFamily: 'ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace' }}
               />
             </div>
           </div>
         ) : (
-          <Input.TextArea
-            value={editorText}
-            onChange={(e) => {
-              const v = e.target.value
-              setEditorText(v)
-              if (mode === 'raw') setRawText(v)
-              if (mode === 'condensed') setCondensedText(v)
-            }}
-            placeholder={mode === 'raw' ? '编辑章节原文…' : '编辑精简内容…'}
-            rows={16}
-            style={{ resize: 'none', background: '#fdfdfd' }}
-          />
+          <div className="space-y-3">
+            <Input.TextArea
+              value={editorText}
+              onChange={(e) => {
+                const v = e.target.value
+                setEditorText(v)
+                if (mode === 'raw') setRawText(v)
+                if (mode === 'condensed') setCondensedText(v)
+              }}
+            disabled={actionsLoading}
+              placeholder={mode === 'raw' ? '编辑章节原文…' : '编辑精简内容…'}
+              rows={16}
+              style={{ resize: 'none', background: '#fdfdfd' }}
+            />
+            {consistencyResult ? (
+              <Card
+                size="small"
+                title="角色混淆检查结果"
+                extra={
+                  <Space wrap>
+                    <Tag color={consistencyResult.has_issues ? 'red' : 'green'}>
+                      {consistencyResult.has_issues ? '发现问题' : '无问题'}
+                    </Tag>
+                    <Tag>issues：{consistencyIssues.length}</Tag>
+                    <Button
+                      size="small"
+                      type="primary"
+                      icon={<ThunderboltOutlined />}
+                      loading={actionsLoading}
+                      disabled={actionsLoading}
+                      onClick={() => void handleOneClickOptimize()}
+                    >
+                      一键优化
+                    </Button>
+                  </Space>
+                }
+              >
+                {consistencyIssues.length === 0 ? (
+                  <Empty image={Empty.PRESENTED_IMAGE_SIMPLE} description="未发现角色混淆问题" />
+                ) : (
+                  <List
+                    size="small"
+                    dataSource={consistencyIssues}
+                    renderItem={(it: any, idx) => (
+                      <List.Item>
+                        <div className="min-w-0">
+                          <div className="font-medium">
+                            {it?.issue_type ? `[${it.issue_type}] ` : ''}
+                            Issue {idx + 1}
+                          </div>
+                          <div className="text-sm">{it?.description}</div>
+                          {it?.character_candidates?.length ? (
+                            <div className="text-xs text-gray-500 mt-1">候选角色：{it.character_candidates.join('、')}</div>
+                          ) : null}
+                          {it?.suggestion ? (
+                            <div className="text-xs text-gray-500 mt-1">建议：{it.suggestion}</div>
+                          ) : null}
+                          {it?.affected_lines ? (
+                            <div className="text-xs text-gray-400 mt-1">
+                              影响范围：{it.affected_lines.start_line ?? '-'}–{it.affected_lines.end_line ?? '-'}
+                            </div>
+                          ) : null}
+                        </div>
+                      </List.Item>
+                    )}
+                  />
+                )}
+                {consistencyResult.summary ? (
+                  <div className="text-xs text-gray-500 mt-2">{String(consistencyResult.summary)}</div>
+                ) : null}
+              </Card>
+            ) : null}
+          </div>
         )}
       </Modal>
 
diff --git a/front/src/pages/aiStudio/chapter/prep/ChapterPrepLayout.tsx b/front/src/pages/aiStudio/chapter/prep/ChapterPrepLayout.tsx
index 82df0de..66ceed3 100644
--- a/front/src/pages/aiStudio/chapter/prep/ChapterPrepLayout.tsx
+++ b/front/src/pages/aiStudio/chapter/prep/ChapterPrepLayout.tsx
@@ -9,7 +9,6 @@ import type { PrepFlowContext, StepKey } from './usePrepFlow'
 const { Header, Content } = Layout
 
 const STEP_ITEMS: { key: StepKey; title: string }[] = [
-  { key: 'consistency', title: '角色混淆一致性检查' },
   { key: 'divide', title: '分镜提取' },
   { key: 'extract', title: '项目级信息提取' },
 ]
@@ -62,7 +61,7 @@ export default function ChapterPrepLayout() {
       })
   }, [chapterId])
 
-  const currentStepKey = getStepKeyFromPathname(location.pathname) ?? 'consistency'
+  const currentStepKey = getStepKeyFromPathname(location.pathname) ?? 'divide'
   const currentStepIndex = Math.max(
     0,
     STEP_ITEMS.findIndex((x) => x.key === currentStepKey),
@@ -132,14 +131,12 @@ export default function ChapterPrepLayout() {
   const nextStep = currentStepIndex < STEP_ITEMS.length - 1 ? STEP_ITEMS[currentStepIndex + 1] : null
 
   const isStepAllowed = (key: StepKey) => {
-    if (key === 'consistency') return true
-    if (key === 'divide') return !!workingScriptText.trim() && consistencyDone
+    if (key === 'divide') return !!workingScriptText.trim()
     if (key === 'extract') return !!scriptDivision && editableShots.length > 0
     return false
   }
 
   const isCurrentStepCompleted = () => {
-    if (currentStepKey === 'consistency') return consistencyDone
     if (currentStepKey === 'divide') return !!scriptDivision && editableShots.length > 0
     if (currentStepKey === 'extract') return !!extractionDraft
     return false
@@ -225,7 +222,7 @@ export default function ChapterPrepLayout() {
             showIcon
             className="mb-3"
             message="当前章节没有原文内容"
-            description="请先点击右上角“编辑原文”粘贴/输入剧本，然后从“一致性检查”开始。"
+            description="请先点击右上角“编辑原文”粘贴/输入剧本，然后从“分镜提取”开始。"
           />
         )}
 
diff --git a/front/src/pages/aiStudio/chapter/prep/steps/DivideStep.tsx b/front/src/pages/aiStudio/chapter/prep/steps/DivideStep.tsx
index e229856..e6ce112 100644
--- a/front/src/pages/aiStudio/chapter/prep/steps/DivideStep.tsx
+++ b/front/src/pages/aiStudio/chapter/prep/steps/DivideStep.tsx
@@ -159,7 +159,7 @@ export default function DivideStep() {
 
   return (
     <Card
-      title="Step 2 / 3：分镜提取（可编辑）"
+      title="Step 1 / 2：分镜提取（可编辑）"
       style={{ flex: 1, minHeight: 0, overflow: 'auto' }}
       bodyStyle={{ padding: 12 }}
       extra={
@@ -167,7 +167,7 @@ export default function DivideStep() {
           <Button type="primary" icon={<ThunderboltOutlined />} loading={loading} onClick={() => void runDivide()}>
             开始分镜提取
           </Button>
-          <Button icon={<PlusOutlined />} disabled={loading} onClick={addRow}>
+          <Button icon={<PlusOutlined />} disabled={loading || shots.length === 0} onClick={addRow}>
             新增镜头
           </Button>
           <Button danger icon={<DeleteOutlined />} disabled={loading} onClick={deleteSelected}>
diff --git a/front/src/pages/aiStudio/chapter/prep/steps/ExtractProjectStep.tsx b/front/src/pages/aiStudio/chapter/prep/steps/ExtractProjectStep.tsx
index 20bb401..8b19f63 100644
--- a/front/src/pages/aiStudio/chapter/prep/steps/ExtractProjectStep.tsx
+++ b/front/src/pages/aiStudio/chapter/prep/steps/ExtractProjectStep.tsx
@@ -121,7 +121,7 @@ export default function ExtractProjectStep() {
 
   return (
     <Card
-      title="Step 3 / 3：项目级信息提取（最终输出）"
+      title="Step 2 / 2：项目级信息提取（最终输出）"
       style={{ flex: 1, minHeight: 0, overflow: 'hidden' }}
       bodyStyle={{ padding: 12, height: '100%', overflow: 'hidden', display: 'flex', flexDirection: 'column' }}
       extra={