feat: 标题样式3个预设（经典/醒目/柔和）一键应用

- ClipPropertiesPanel 新增 TITLE_PRESETS 常量（3组预设样式）
- 预设按钮 UI：经典🅰/醒目🔠/柔和🅒，点击一键应用字体+大小+粗体+斜体+描边+阴影
- CSS 样式：ep-title-presets 横排 flex，hover 高亮与 ep-style-btn 风格统一

🟢 P2-2 完成

apps/web/src/pages/editing-planner/EditingPlanner.css

@@ -1194,6 +1194,38 @@
   color: var(--primary, #6366f1);
 }
 
+/* 标题预设样式按钮 */
+.ep-title-presets {
+  display: flex;
+  gap: 8px;
+}
+
+.ep-title-preset-btn {
+  flex: 1;
+  height: 36px;
+  background: var(--bg-primary, #ffffff);
+  border: 1px solid var(--border-color, #e2e8f0);
+  border-radius: var(--radius-xs, 8px);
+  color: var(--text-secondary, #64748b);
+  font-size: 12px;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 4px;
+  transition: all 0.2s ease;
+}
+
+.ep-title-preset-btn:hover {
+  border-color: var(--primary, #6366f1);
+  color: var(--primary, #6366f1);
+  background: var(--primary-soft, #eef2ff);
+}
+
+.ep-title-preset-icon {
+  font-size: 14px;
+}
+
 /* AI推荐按钮 */
 .ep-ai-recommend-btn {
   width: 100%;

apps/web/src/pages/editing-planner/components/ClipPropertiesPanel.tsx

@@ -81,6 +81,28 @@ const BGM_OPTIONS = [
   { value: "bgm_04", label: "🎵 科技感" },
 ];
 
+/** 标题样式预设 — 一键应用一组样式 */
+const TITLE_PRESETS = [
+  {
+    key: "classic",
+    label: "经典",
+    icon: "🅰",
+    style: { font: "思源黑体", size: 24, bold: true, italic: false, stroke: true, shadow: false },
+  },
+  {
+    key: "bold",
+    label: "醒目",
+    icon: "🔠",
+    style: { font: "思源黑体", size: 32, bold: true, italic: false, stroke: true, shadow: true },
+  },
+  {
+    key: "elegant",
+    label: "柔和",
+    icon: "🅒",
+    style: { font: "思源宋体", size: 20, bold: false, italic: false, stroke: false, shadow: true },
+  },
+];
+
 const ClipPropertiesPanel: React.FC<ClipPropertiesPanelProps> = ({
   selectedClip,
   titleSettings,
@@ -172,6 +194,23 @@ const ClipPropertiesPanel: React.FC<ClipPropertiesPanelProps> = ({
               </div>
             </div>
 
+            <div className="ep-field">
+              <label className="ep-field-label">预设样式</label>
+              <div className="ep-title-presets">
+                {TITLE_PRESETS.map((p) => (
+                  <button
+                    key={p.key}
+                    className="ep-title-preset-btn"
+                    onClick={() => onTitleSettingsChange({ ...p.style })}
+                    title={`${p.label}: ${p.style.font} ${p.style.size}px`}
+                  >
+                    <span className="ep-title-preset-icon">{p.icon}</span>
+                    <span>{p.label}</span>
+                  </button>
+                ))}
+              </div>
+            </div>
+
             <div className="ep-field">
               <label className="ep-field-label">样式</label>
               <div className="ep-style-btns">