diff --git a/apps/web/src/api/editPlans.ts b/apps/web/src/api/editPlans.ts
index 303facc1a..90777846d 100644
--- a/apps/web/src/api/editPlans.ts
+++ b/apps/web/src/api/editPlans.ts
@@ -68,6 +68,51 @@ export interface GenerationStatusResponse {
   clips: ClipStatusItem[];
 }
 
+/* ============================================================
+ * AI 推荐 & 封面生成（任务 3.09）
+ * ============================================================ */
+
+/** AI 推荐请求 */
+export interface AIRecommendRequest {
+  asset_ids: string[];
+  editing_mode?: string;
+  target_duration?: number;
+}
+
+/** AI 推荐单个片段 */
+export interface AIRecommendClipItem {
+  clip_type: string;
+  order: number;
+  text_content: string;
+  duration: number;
+  transition_effect: string;
+  asset_id: string;
+  start_time: number;
+  config: Record<string, unknown>;
+}
+
+/** AI 推荐响应 */
+export interface AIRecommendResponse {
+  plan_id: string;
+  clips: AIRecommendClipItem[];
+  config: Record<string, unknown>;
+  total_duration: number;
+  confidence: number;
+}
+
+/** AI 封面生成请求 */
+export interface GenerateCoverRequest {
+  asset_ids: string[];
+  cover_type?: "ai_frame" | "manual" | "upload" | "ai_regenerate";
+  frame_time?: number;
+}
+
+/** AI 封面生成响应 */
+export interface GenerateCoverResponse {
+  plan_id: string;
+  cover: Record<string, unknown>;
+}
+
 /* ============================================================
  * 前端 UI 类型（EditingPlanner 组件依赖，保留兼容）
  * ============================================================ */
@@ -177,6 +222,30 @@ export async function getGenerationStatus(
   return response.data;
 }
 
+/** AI 推荐片段方案 */
+export async function aiRecommendClips(
+  planId: string,
+  data: AIRecommendRequest,
+): Promise<AIRecommendResponse> {
+  const response = await apiClient.post(
+    `/edit-plans/${planId}/ai-recommend`,
+    data,
+  );
+  return response.data;
+}
+
+/** AI 生成封面 */
+export async function generateCover(
+  planId: string,
+  data: GenerateCoverRequest,
+): Promise<GenerateCoverResponse> {
+  const response = await apiClient.post(
+    `/edit-plans/${planId}/generate-cover`,
+    data,
+  );
+  return response.data;
+}
+
 /**
  * 获取素材库列表 — 调用 GET /api/v1/assets?library_id=xxx
  * 将后端 AssetResponse 映射为前端 MediaAsset 类型
diff --git a/apps/web/src/pages/editing-planner/EditingPlanner.tsx b/apps/web/src/pages/editing-planner/EditingPlanner.tsx
index 39e71dd14..bd33b5967 100644
--- a/apps/web/src/pages/editing-planner/EditingPlanner.tsx
+++ b/apps/web/src/pages/editing-planner/EditingPlanner.tsx
@@ -26,7 +26,13 @@ import {
   MODE_LABELS,
 } from "@/api/editingPlanner";
 import type { EditPlanClip, MediaAsset } from "@/api/editPlans";
-import { getMediaAssets, MATERIAL_TYPE_LABELS } from "@/api/editPlans";
+import {
+  getMediaAssets,
+  MATERIAL_TYPE_LABELS,
+  aiRecommendClips,
+  generateCover,
+} from "@/api/editPlans";
+import { useUndoRedo } from "./hooks/useUndoRedo";
 import type { TaskItem } from "@/api/tasks";
 import { createGenerationTask, getTask, retryTask } from "@/api/tasks";
 
@@ -80,10 +86,22 @@ const EditingPlanner: React.FC = () => {
   );
   const [currentMode, setCurrentMode] = useState<TemplateMode>("pip");
 
-  /* ── 片段 ── */
-  const [clips, setClips] = useState<ClipData[]>([]);
+  /* ── 片段（撤销/重做） ── */
+  const {
+    state: clips,
+    set: setClips,
+    undo,
+    redo,
+    canUndo,
+    canRedo,
+    reset: resetClips,
+  } = useUndoRedo<ClipData[]>([]);
   const [selectedClipId, setSelectedClipId] = useState<string | null>(null);
 
+  /* ── AI 操作状态 ── */
+  const [aiRecommendLoading, setAiRecommendLoading] = useState(false);
+  const [aiCoverLoading, setAiCoverLoading] = useState(false);
+
   /* ── 封面方案 ── */
   const [currentCoverScheme, setCurrentCoverScheme] =
     useState<string>("ai_frame");
@@ -182,7 +200,7 @@ const EditingPlanner: React.FC = () => {
           assetName: undefined,
           transition: { type: "none", duration: 0 },
         }));
-        setClips(mapped);
+        resetClips(mapped);
 
         setTitleSettings((prev) => ({
           ...prev,
@@ -290,6 +308,74 @@ const EditingPlanner: React.FC = () => {
     setClips((prev) => [...prev, newClip]);
   };
 
+  /* AI 推荐片段 */
+  const handleAiRecommend = async () => {
+    if (!loadedTemplateId) {
+      msg.warning("请先加载模板");
+      return;
+    }
+    const assetIds = clips
+      .map((c) => c.media_asset_id)
+      .filter((v): v is string => !!v);
+    if (assetIds.length === 0) {
+      msg.warning("请先添加素材到片段");
+      return;
+    }
+    setAiRecommendLoading(true);
+    try {
+      const res = await aiRecommendClips(loadedTemplateId, {
+        asset_ids: assetIds,
+        editing_mode: currentMode,
+        target_duration: totalDuration || 30,
+      });
+      const mapped: ClipData[] = res.clips.map((c, i) => ({
+        id: `clip-ai-${i}-${Date.now()}`,
+        template_segment_id: "",
+        name: `片段${i + 1} · ${c.clip_type}`,
+        material_type: (c.clip_type as ClipData["material_type"]) || "video",
+        script_text: c.text_content || "",
+        duration: c.duration || 5,
+        order: c.order ?? i,
+        media_asset_id: c.asset_id || undefined,
+        assetName: undefined,
+        transition: { type: "none", duration: 0 },
+      }));
+      setClips(mapped);
+      msg.success(`AI 推荐了 ${mapped.length} 个片段`);
+    } catch {
+      msg.error("AI 推荐失败");
+    } finally {
+      setAiRecommendLoading(false);
+    }
+  };
+
+  /* AI 封面生成 */
+  const handleAiGenerateCover = async (
+    coverType: "ai_frame" | "ai_regenerate",
+  ) => {
+    if (!loadedTemplateId) return;
+    const assetIds = clips
+      .map((c) => c.media_asset_id)
+      .filter((v): v is string => !!v);
+    if (assetIds.length === 0) {
+      msg.warning("请先添加素材");
+      return;
+    }
+    setAiCoverLoading(true);
+    try {
+      await generateCover(loadedTemplateId, {
+        asset_ids: assetIds,
+        cover_type: coverType,
+      });
+      setCurrentCoverScheme(coverType === "ai_frame" ? "ai_frame" : "ai_reselect");
+      msg.success("AI 封面生成成功");
+    } catch {
+      msg.error("AI 封面生成失败");
+    } finally {
+      setAiCoverLoading(false);
+    }
+  };
+
   /* 保存 */
   const handleOpenSaveModal = () => {
     if (!loadedTemplateId) {
@@ -447,6 +533,22 @@ const EditingPlanner: React.FC = () => {
           </span>
         </div>
         <div className="ep-top-bar-right">
+          <button
+            className="ep-btn ep-btn-secondary"
+            onClick={undo}
+            disabled={!canUndo}
+            title="撤销 (Ctrl+Z)"
+          >
+            ⬅️ 撤销
+          </button>
+          <button
+            className="ep-btn ep-btn-secondary"
+            onClick={redo}
+            disabled={!canRedo}
+            title="重做 (Ctrl+Shift+Z)"
+          >
+            ➡️ 重做
+          </button>
           <button
             className="ep-btn ep-btn-secondary"
             onClick={handleOpenSaveModal}
@@ -500,9 +602,11 @@ const EditingPlanner: React.FC = () => {
             isPlaying={isPlaying}
             currentCoverScheme={currentCoverScheme}
             coverSchemes={COVER_SCHEMES}
+            aiCoverLoading={aiCoverLoading}
             onClipSelect={handleClipSelect}
             onCoverSchemeChange={setCurrentCoverScheme}
             onPlayPause={() => setIsPlaying(!isPlaying)}
+            onAiGenerateCover={handleAiGenerateCover}
           />
 
           {/* 下半部：水平时间线 */}
@@ -528,6 +632,7 @@ const EditingPlanner: React.FC = () => {
           clipsCount={clips.length}
           totalDuration={totalDuration}
           currentMode={currentMode}
+          aiRecommendLoading={aiRecommendLoading}
           onTitleSettingsChange={(partial) =>
             setTitleSettings((prev) => ({ ...prev, ...partial }))
           }
@@ -538,6 +643,7 @@ const EditingPlanner: React.FC = () => {
             setBgmSettings((prev) => ({ ...prev, ...partial }))
           }
           onClipUpdate={handleClipUpdate}
+          onAiRecommend={handleAiRecommend}
         />
       </div>
 
diff --git a/apps/web/src/pages/editing-planner/components/ClipPropertiesPanel.tsx b/apps/web/src/pages/editing-planner/components/ClipPropertiesPanel.tsx
index 71f41595f..cc23169e2 100644
--- a/apps/web/src/pages/editing-planner/components/ClipPropertiesPanel.tsx
+++ b/apps/web/src/pages/editing-planner/components/ClipPropertiesPanel.tsx
@@ -50,10 +50,12 @@ interface ClipPropertiesPanelProps {
   clipsCount: number;
   totalDuration: number;
   currentMode: TemplateMode;
+  aiRecommendLoading: boolean;
   onTitleSettingsChange: (partial: Partial<TitleSettings>) => void;
   onSubtitleSettingsChange: (partial: Partial<SubtitleSettings>) => void;
   onBgmSettingsChange: (partial: Partial<BgmSettings>) => void;
   onClipUpdate: (clipId: string, data: Partial<ClipData>) => void;
+  onAiRecommend: () => void;
 }
 
 const POSITION_OPTIONS = [
@@ -87,10 +89,12 @@ const ClipPropertiesPanel: React.FC<ClipPropertiesPanelProps> = ({
   clipsCount,
   totalDuration,
   currentMode,
+  aiRecommendLoading,
   onTitleSettingsChange,
   onSubtitleSettingsChange,
   onBgmSettingsChange,
   onClipUpdate,
+  onAiRecommend,
 }) => {
   return (
     <div className="ep-right-panel">
@@ -383,8 +387,12 @@ const ClipPropertiesPanel: React.FC<ClipPropertiesPanelProps> = ({
               </div>
             </div>
 
-            <button className="ep-ai-recommend-btn">
-              ✨ AI 推荐素材
+            <button
+              className="ep-ai-recommend-btn"
+              onClick={onAiRecommend}
+              disabled={aiRecommendLoading}
+            >
+              {aiRecommendLoading ? "⏳ AI 分析中..." : "✨ AI 推荐素材"}
             </button>
           </div>
         </div>
diff --git a/apps/web/src/pages/editing-planner/components/PreviewPlayer.tsx b/apps/web/src/pages/editing-planner/components/PreviewPlayer.tsx
index 824dfba7f..d2f8067d6 100644
--- a/apps/web/src/pages/editing-planner/components/PreviewPlayer.tsx
+++ b/apps/web/src/pages/editing-planner/components/PreviewPlayer.tsx
@@ -25,9 +25,11 @@ interface PreviewPlayerProps {
   isPlaying: boolean;
   currentCoverScheme: string;
   coverSchemes: CoverScheme[];
+  aiCoverLoading: boolean;
   onClipSelect: (clipId: string) => void;
   onCoverSchemeChange: (scheme: string) => void;
   onPlayPause: () => void;
+  onAiGenerateCover: (coverType: "ai_frame" | "ai_regenerate") => void;
 }
 
 const MATERIAL_ICONS: Record<string, string> = {
@@ -43,8 +45,10 @@ const PreviewPlayer: React.FC<PreviewPlayerProps> = ({
   isPlaying,
   currentCoverScheme,
   coverSchemes,
+  aiCoverLoading,
   onCoverSchemeChange,
   onPlayPause,
+  onAiGenerateCover,
 }) => {
   const selectedClip = clips.find((c) => c.id === selectedClipId);
   const displayClip = selectedClip || clips[0];
@@ -94,6 +98,25 @@ const PreviewPlayer: React.FC<PreviewPlayerProps> = ({
           {coverSchemes.find((s) => s.key === currentCoverScheme)?.label ||
             "封面预览"}
         </div>
+        {/* AI 封面操作按钮 */}
+        <div className="ep-cover-ai-btns">
+          <button
+            className="ep-cover-ai-btn"
+            onClick={() => onAiGenerateCover("ai_frame")}
+            disabled={aiCoverLoading}
+            title="AI 智能选帧"
+          >
+            {aiCoverLoading ? "⏳" : "🤖"} AI 选帧
+          </button>
+          <button
+            className="ep-cover-ai-btn"
+            onClick={() => onAiGenerateCover("ai_regenerate")}
+            disabled={aiCoverLoading}
+            title="AI 重新生成封面"
+          >
+            {aiCoverLoading ? "⏳" : "🔄"} AI 重选
+          </button>
+        </div>
       </div>
 
       {/* 封面方案按钮（竖排4个） */}
diff --git a/apps/web/src/pages/editing-planner/hooks/useUndoRedo.ts b/apps/web/src/pages/editing-planner/hooks/useUndoRedo.ts
new file mode 100644
index 000000000..4e96e25ab
--- /dev/null
+++ b/apps/web/src/pages/editing-planner/hooks/useUndoRedo.ts
@@ -0,0 +1,65 @@
+/**
+ * 撤销/重做 Hook — 通用历史栈管理
+ * 支持任意状态的快照式 undo/redo
+ */
+import { useState, useCallback, useRef } from "react";
+
+const MAX_HISTORY = 50;
+
+export function useUndoRedo<T>(initialState: T) {
+  const [present, setPresent] = useState<T>(initialState);
+  const pastRef = useRef<T[]>([]);
+  const futureRef = useRef<T[]>([]);
+  const [canUndo, setCanUndo] = useState(false);
+  const [canRedo, setCanRedo] = useState(false);
+
+  const set = useCallback(
+    (next: T | ((prev: T) => T)) => {
+      setPresent((curr) => {
+        const resolved = typeof next === "function" ? (next as (p: T) => T)(curr) : next;
+        pastRef.current = [...pastRef.current.slice(-(MAX_HISTORY - 1)), curr];
+        futureRef.current = [];
+        setCanUndo(true);
+        setCanRedo(false);
+        return resolved;
+      });
+    },
+    [],
+  );
+
+  const undo = useCallback(() => {
+    setPresent((curr) => {
+      const past = pastRef.current;
+      if (past.length === 0) return curr;
+      const prev = past[past.length - 1];
+      pastRef.current = past.slice(0, -1);
+      futureRef.current = [curr, ...futureRef.current];
+      setCanUndo(pastRef.current.length > 0);
+      setCanRedo(true);
+      return prev;
+    });
+  }, []);
+
+  const redo = useCallback(() => {
+    setPresent((curr) => {
+      const future = futureRef.current;
+      if (future.length === 0) return curr;
+      const next = future[0];
+      futureRef.current = future.slice(1);
+      pastRef.current = [...pastRef.current, curr];
+      setCanUndo(true);
+      setCanRedo(futureRef.current.length > 0);
+      return next;
+    });
+  }, []);
+
+  const reset = useCallback((state: T) => {
+    pastRef.current = [];
+    futureRef.current = [];
+    setPresent(state);
+    setCanUndo(false);
+    setCanRedo(false);
+  }, []);
+
+  return { state: present, set, undo, redo, canUndo, canRedo, reset };
+}