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src/components/workflow/MixCutMaterialPickerDialog.vue

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+<script setup>
+import { computed, onMounted, ref, watch } from "vue";
+import { listMixCutMaterialLibrary } from "../../services/mixCutSettings.js";
+import { localMediaToPlayableUrl } from "../../services/materialMedia.js";
+
+const visible = defineModel("visible", { type: Boolean, default: false });
+
+const emit = defineEmits(["select"]);
+
+const materials = ref([]);
+const loading = ref(false);
+
+async function refresh() {
+  loading.value = true;
+  try {
+    materials.value = await listMixCutMaterialLibrary();
+  } catch {
+    materials.value = [];
+  } finally {
+    loading.value = false;
+  }
+}
+
+watch(visible, (open) => {
+  if (open) refresh();
+});
+
+onMounted(() => {
+  if (visible.value) refresh();
+});
+
+function previewSrc(item) {
+  if (!item?.path) return "";
+  try {
+    return localMediaToPlayableUrl(item.path);
+  } catch {
+    return "";
+  }
+}
+
+function onSelect(item) {
+  emit("select", item);
+  visible.value = false;
+}
+
+const emptyText = computed(() =>
+  loading.value ? "加载中…" : "素材库为空，请先在「素材管理」页上传",
+);
+</script>
+
+<template>
+  <Dialog
+    v-model:visible="visible"
+    modal
+    header="选择素材库素材"
+    :style="{ width: '720px' }"
+    :draggable="false"
+  >
+    <div v-if="loading" class="py-10 text-center text-sm text-slate-400">
+      正在加载素材库…
+    </div>
+    <div
+      v-else-if="!materials.length"
+      class="py-10 text-center text-sm text-slate-400"
+    >
+      {{ emptyText }}
+    </div>
+    <div
+      v-else
+      class="grid max-h-[70vh] grid-cols-3 gap-3 overflow-y-auto"
+    >
+      <button
+        v-for="item in materials"
+        :key="item.id"
+        type="button"
+        class="rounded-lg border border-slate-700 bg-slate-900/50 p-2 text-left transition hover:border-blue-500/60 hover:bg-slate-800/80"
+        @click="onSelect(item)"
+      >
+        <div
+          class="mb-2 flex aspect-video items-center justify-center overflow-hidden rounded bg-slate-950"
+        >
+          <img
+            v-if="item.type === 'image'"
+            :src="previewSrc(item)"
+            :alt="item.name"
+            class="h-full w-full object-cover"
+          />
+          <video
+            v-else
+            :src="previewSrc(item)"
+            class="h-full w-full object-cover"
+            muted
+            preload="metadata"
+          />
+        </div>
+        <div class="truncate text-sm font-medium text-slate-200">
+          {{ item.name }}
+        </div>
+        <div class="truncate text-xs text-slate-500">
+          {{ item.type === "image" ? "图片" : "视频" }}
+        </div>
+      </button>
+    </div>
+  </Dialog>
+</template>

src/components/workflow/MixCutSettingDialog.vue

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+<script setup>
+import { ref, watch } from "vue";
+import { storeToRefs } from "pinia";
+import { useWorkflowStore } from "../../stores/workflow.js";
+import MixCutSettingPanel from "./MixCutSettingPanel.vue";
+import {
+  loadVideoMixCutSettings,
+  saveVideoMixCutSettings,
+} from "../../services/mixCutSettings.js";
+
+const emit = defineEmits(["feedback"]);
+
+const workflow = useWorkflowStore();
+const { mixCutModalVisible } = storeToRefs(workflow);
+
+const panelRef = ref(null);
+const saving = ref(false);
+
+async function loadPanelSettings() {
+  const settings = await loadVideoMixCutSettings();
+  if (workflow.pipInPicture && !settings.enabled) {
+    settings.enabled = true;
+  }
+  panelRef.value?.applyIncomingSettings(settings);
+  if (settings.mode === "subtitle") {
+    await panelRef.value?.loadExistingSubtitleLines();
+  }
+}
+
+watch(mixCutModalVisible, (open) => {
+  if (open) {
+    loadPanelSettings();
+  }
+});
+
+function onClose() {
+  workflow.closeMixCutDialog();
+}
+
+async function onConfirm() {
+  if (!panelRef.value) return;
+  saving.value = true;
+  try {
+    const payload = await panelRef.value.save();
+    await saveVideoMixCutSettings(payload);
+    workflow.pipInPicture = Boolean(payload.enabled);
+    emit("feedback", { ok: true, message: "混剪配置保存成功！" });
+    workflow.closeMixCutDialog();
+  } catch (err) {
+    const msg = err instanceof Error ? err.message : String(err);
+    emit("feedback", { ok: false, message: `保存配置失败：${msg}` });
+  } finally {
+    saving.value = false;
+  }
+}
+
+function onPanelFeedback(result) {
+  if (result?.message) emit("feedback", result);
+}
+</script>
+
+<template>
+  <Dialog
+    v-model:visible="mixCutModalVisible"
+    modal
+    header="画中画设置"
+    :style="{ width: '760px' }"
+    :draggable="false"
+    class="mixcut-setting-dialog"
+    @hide="onClose"
+  >
+    <div class="max-h-[70vh] space-y-4 overflow-y-auto p-4">
+      <MixCutSettingPanel
+        ref="panelRef"
+        :store="workflow"
+        @feedback="onPanelFeedback"
+      />
+    </div>
+
+    <template #footer>
+      <Button
+        label="取消"
+        severity="secondary"
+        text
+        :disabled="saving"
+        @click="onClose"
+      />
+      <Button
+        label="保存"
+        :loading="saving"
+        @click="onConfirm"
+      />
+    </template>
+  </Dialog>
+</template>

src/components/workflow/MixCutSettingPanel.vue

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+<script setup>
+import { computed, ref, watch } from "vue";
+import MixCutMaterialPickerDialog from "./MixCutMaterialPickerDialog.vue";
+import {
+  applyGlobalDisplayToAllMaterials,
+  bindMaterialToSubtitleLine,
+  bindMaterialToSubtitleLines,
+  findMappingForLine,
+  loadMixCutSubtitleRecords,
+  openSubtitleFileAndParse,
+  pickLocalMixCutMaterial,
+  pickMaterialFolder,
+  prepareMixCutSettingsForSave,
+  removeMaterialFromSubtitleLine,
+} from "../../services/mixCutSettings.js";
+import {
+  createDefaultGlobalDisplay,
+  createDefaultMixCutSettings,
+  MINIMIZED_POSITION_OPTIONS,
+  PIP_POSITION_OPTIONS,
+  SELECTION_MODE_OPTIONS,
+} from "../../utils/mixCutDefaults.js";
+import { formatRecordTimeRange } from "../../utils/srtParser.js";
+
+const props = defineProps({
+  store: { type: Object, required: true },
+});
+
+const emit = defineEmits(["saved", "feedback"]);
+
+const settings = ref(createDefaultMixCutSettings());
+const globalDisplay = ref(createDefaultGlobalDisplay());
+const records = ref([]);
+const subtitleFilePath = ref("");
+const loadingSubtitles = ref(false);
+const selectedLineIndices = ref(new Set());
+
+const materialPickerVisible = ref(false);
+/** @type {import('vue').Ref<{ type: string, lineIndex?: number, segment?: string, groupId?: string } | null>} */
+const materialPickTarget = ref(null);
+
+const modeOptions = [
+  { label: "字幕模式", value: "subtitle" },
+  { label: "固定模式", value: "fixed" },
+  { label: "关键词模式", value: "keyword" },
+];
+
+const displayModeOptions = [
+  { label: "全屏替换", value: "fullscreen" },
+  { label: "画中画", value: "pip" },
+];
+
+const scaleModeOptions = [
+  { label: "适应", value: "fit" },
+  { label: "填充", value: "fill" },
+  { label: "拉伸", value: "stretch" },
+];
+
+const shapeOptions = [
+  { label: "方形", value: "square" },
+  { label: "圆形", value: "circle" },
+];
+
+const loadedLineCount = computed(() => records.value.length);
+const hasSelectedLines = computed(() => selectedLineIndices.value.size > 0);
+
+function showFeedback(severity, message) {
+  if (!message) return;
+  emit("feedback", { ok: severity !== "error", message });
+}
+
+function fileNameFromPath(path) {
+  if (!path) return "";
+  return path.split(/[/\\]/).pop() || path;
+}
+
+function mappingForLine(lineIndex) {
+  return findMappingForLine(settings.value, lineIndex);
+}
+
+function materialLabelForLine(lineIndex) {
+  const mapping = mappingForLine(lineIndex);
+  if (!mapping?.materialPath) return "";
+  return fileNameFromPath(mapping.materialPath);
+}
+
+function isLineSelected(lineIndex) {
+  return selectedLineIndices.value.has(lineIndex);
+}
+
+function toggleLineSelection(lineIndex, checked) {
+  const next = new Set(selectedLineIndices.value);
+  if (checked) next.add(lineIndex);
+  else next.delete(lineIndex);
+  selectedLineIndices.value = next;
+}
+
+function applyIncomingSettings(raw) {
+  settings.value = { ...createDefaultMixCutSettings(), ...raw };
+  records.value = Array.isArray(raw.records) ? [...raw.records] : [];
+  subtitleFilePath.value = raw.subtitleFilePath || "";
+  globalDisplay.value = {
+    ...createDefaultGlobalDisplay(),
+    displayMode: raw.displayMode === "pip" ? "pip" : "fullscreen",
+  };
+}
+
+async function loadExistingSubtitleLines() {
+  loadingSubtitles.value = true;
+  try {
+    const result = await loadMixCutSubtitleRecords({
+      store: props.store,
+      existingSettings: settings.value,
+    });
+    if (!result.ok) {
+      showFeedback("warn", result.message || "加载字幕失败");
+      return false;
+    }
+    records.value = result.records;
+    if (result.srtPath) subtitleFilePath.value = result.srtPath;
+    settings.value.records = result.records;
+    if (result.srtPath) settings.value.subtitleFilePath = result.srtPath;
+    const msg =
+      result.message ||
+      `字幕加载成功，共 ${result.records.length} 条`;
+    showFeedback("success", msg);
+    return true;
+  } finally {
+    loadingSubtitles.value = false;
+  }
+}
+
+async function onOpenSubtitleFile() {
+  const result = await openSubtitleFileAndParse();
+  if (!result.message && !result.ok) return;
+  if (!result.ok) {
+    showFeedback("error", result.message || "打开字幕文件失败");
+    return;
+  }
+  records.value = result.records;
+  subtitleFilePath.value = result.srtPath || "";
+  settings.value.records = result.records;
+  settings.value.subtitleFilePath = result.srtPath || "";
+  showFeedback("success", `已加载 ${result.records.length} 行字幕`);
+}
+
+function onApplyGlobalDisplay() {
+  applyGlobalDisplayToAllMaterials(settings.value, globalDisplay.value);
+  settings.value.displayMode = globalDisplay.value.displayMode;
+  showFeedback("success", "全局设置已应用到所有素材");
+}
+
+function openMaterialPicker(target) {
+  materialPickTarget.value = target;
+  materialPickerVisible.value = true;
+}
+
+function onPickLibraryForLine(lineIndex) {
+  openMaterialPicker({ type: "subtitle-line", lineIndex });
+}
+
+async function onPickLocalForLine(lineIndex) {
+  const path = await pickLocalMixCutMaterial();
+  if (!path) return;
+  bindMaterialToSubtitleLine(settings.value, lineIndex, path);
+  showFeedback("success", "素材已选择");
+}
+
+function onRemoveLineMaterial(lineIndex) {
+  removeMaterialFromSubtitleLine(settings.value, lineIndex);
+  showFeedback("success", "素材已删除");
+}
+
+function onMaterialSelected(item) {
+  const target = materialPickTarget.value;
+  if (!target || !item?.path) return;
+
+  if (target.type === "subtitle-line") {
+    const indices = hasSelectedLines.value
+      ? Array.from(selectedLineIndices.value)
+      : [target.lineIndex];
+    if (indices.length > 1) {
+      bindMaterialToSubtitleLines(settings.value, indices, item.path);
+      showFeedback("success", "已为选中的多条字幕绑定同一个素材");
+      selectedLineIndices.value = new Set();
+    } else {
+      bindMaterialToSubtitleLine(settings.value, target.lineIndex, item.path);
+      showFeedback("success", "素材已选择");
+    }
+  } else if (target.type === "fixed-segment") {
+    const seg = settings.value.fixedModeConfig[target.segment];
+    if (seg) {
+      seg.specifiedMaterialPath = item.path;
+      seg.selectionMode = "specified";
+    }
+    showFeedback("success", "素材已选择");
+  } else if (target.type === "keyword-group") {
+    const group = settings.value.keywordModeConfig.groups.find(
+      (g) => g.groupId === target.groupId,
+    );
+    if (group) {
+      group.specifiedMaterialPath = item.path;
+      group.selectionMode = "specified";
+    }
+    showFeedback("success", "素材已选择");
+  }
+
+  materialPickTarget.value = null;
+}
+
+async function onPickFolderForSegment(segmentKey) {
+  const path = await pickMaterialFolder();
+  if (!path) return;
+  settings.value.fixedModeConfig[segmentKey].materialFolderPath = path;
+}
+
+async function onPickFolderForKeywordGroup(groupId) {
+  const path = await pickMaterialFolder();
+  if (!path) return;
+  const group = settings.value.keywordModeConfig.groups.find(
+    (g) => g.groupId === groupId,
+  );
+  if (group) group.materialFolderPath = path;
+}
+
+async function save() {
+  const payload = prepareMixCutSettingsForSave(settings.value, globalDisplay.value);
+  payload.records = records.value;
+  payload.subtitleFilePath = subtitleFilePath.value;
+  emit("saved", payload);
+  return payload;
+}
+
+watch(
+  () => settings.value.mode,
+  async (mode) => {
+    if (mode === "subtitle" && !records.value.length) {
+      await loadExistingSubtitleLines();
+    }
+  },
+);
+
+defineExpose({
+  applyIncomingSettings,
+  loadExistingSubtitleLines,
+  save,
+});
+</script>
+
+<template>
+  <div class="mixcut-setting-panel space-y-6">
+    <div>
+      <label class="flex items-center gap-2">
+        <Checkbox v-model="settings.enabled" binary />
+        <span class="font-medium text-slate-100">启用画中画混剪</span>
+      </label>
+      <p class="ml-6 mt-1 text-xs text-slate-500">
+        勾选后，点击自动处理时将应用混剪效果
+      </p>
+    </div>
+
+    <hr class="border-slate-700/80" />
+
+    <div>
+      <label class="mb-2 block text-sm font-medium text-slate-200">混剪模式</label>
+      <SelectButton
+        v-model="settings.mode"
+        :options="modeOptions"
+        option-label="label"
+        option-value="value"
+        size="small"
+      />
+    </div>
+
+    <hr class="border-slate-700/80" />
+
+    <div
+      class="global-display-panel rounded-lg border border-blue-500/35 p-4"
+      style="
+        background: linear-gradient(
+          180deg,
+          rgba(18, 33, 58, 0.96) 0%,
+          rgba(15, 23, 42, 0.98) 100%
+        );
+        box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
+      "
+    >
+      <div class="mb-3 flex items-center justify-between gap-2">
+        <h3 class="text-sm font-semibold text-blue-100">
+          全局显示模式（应用到所有素材）
+        </h3>
+        <Button
+          label="应用到所有素材"
+          size="small"
+          @click="onApplyGlobalDisplay"
+        />
+      </div>
+
+      <div class="space-y-3">
+        <div>
+          <label class="mb-1 block text-xs font-medium text-slate-200">显示模式</label>
+          <SelectButton
+            v-model="globalDisplay.displayMode"
+            :options="displayModeOptions"
+            option-label="label"
+            option-value="value"
+            size="small"
+          />
+        </div>
+
+        <div
+          v-if="globalDisplay.displayMode === 'fullscreen'"
+          class="ml-4 space-y-2 border-l-2 border-blue-400/35 pl-3"
+        >
+          <label class="flex items-center gap-2">
+            <Checkbox v-model="globalDisplay.originalVideoMinimized.enabled" binary />
+            <span class="text-xs text-slate-200">原视频最小化</span>
+          </label>
+          <template v-if="globalDisplay.originalVideoMinimized.enabled">
+            <div>
+              <label class="mb-1 block text-xs text-slate-400">形状</label>
+              <SelectButton
+                v-model="globalDisplay.originalVideoMinimized.shape"
+                :options="shapeOptions"
+                option-label="label"
+                option-value="value"
+                size="small"
+              />
+            </div>
+            <div>
+              <label class="mb-1 block text-xs text-slate-400">位置</label>
+              <Select
+                v-model="globalDisplay.originalVideoMinimized.position"
+                :options="MINIMIZED_POSITION_OPTIONS"
+                option-label="label"
+                option-value="value"
+                size="small"
+                class="w-full"
+              />
+            </div>
+            <div>
+              <label class="mb-1 block text-xs text-slate-400">
+                尺寸占比 {{ globalDisplay.originalVideoMinimized.sizePercent }}%
+              </label>
+              <Slider
+                v-model="globalDisplay.originalVideoMinimized.sizePercent"
+                :min="10"
+                :max="50"
+                :step="5"
+                class="w-full"
+              />
+            </div>
+          </template>
+        </div>
+
+        <div
+          v-else
+          class="ml-4 space-y-2 border-l-2 border-blue-400/35 pl-3"
+        >
+          <div>
+            <label class="mb-1 block text-xs text-slate-400">位置</label>
+            <Select
+              v-model="globalDisplay.pipPosition"
+              :options="PIP_POSITION_OPTIONS"
+              option-label="label"
+              option-value="value"
+              size="small"
+              class="w-full"
+            />
+          </div>
+          <div>
+            <label class="mb-1 block text-xs text-slate-400">
+              尺寸占比 {{ globalDisplay.pipSizePercent }}%
+            </label>
+            <Slider
+              v-model="globalDisplay.pipSizePercent"
+              :min="10"
+              :max="80"
+              :step="5"
+              class="w-full"
+            />
+          </div>
+          <div>
+            <label class="mb-1 block text-xs text-slate-400">缩放模式</label>
+            <SelectButton
+              v-model="globalDisplay.pipScaleMode"
+              :options="scaleModeOptions"
+              option-label="label"
+              option-value="value"
+              size="small"
+            />
+          </div>
+        </div>
+      </div>
+
+      <p class="mt-3 text-xs text-slate-500">
+        💡 提示：修改上述设置后，点击「应用到所有素材」按钮，将统一应用到固定模式、关键词模式和字幕模式的所有素材配置
+      </p>
+    </div>
+
+    <hr class="border-slate-700/80" />
+
+    <!-- 固定模式 -->
+    <div v-if="settings.mode === 'fixed'" class="space-y-4">
+      <div class="text-sm font-medium text-slate-200">固定模式配置</div>
+      <div
+        v-for="segment in [
+          { key: 'opening', label: '片头' },
+          { key: 'middle', label: '片中' },
+          { key: 'ending', label: '片尾' },
+        ]"
+        :key="segment.key"
+        class="space-y-3 rounded-lg border border-slate-700 p-4"
+      >
+        <label class="flex items-center gap-2">
+          <Checkbox
+            v-model="settings.fixedModeConfig[segment.key].enabled"
+            binary
+          />
+          <span class="font-medium text-slate-200">{{ segment.label }}</span>
+        </label>
+
+        <template v-if="settings.fixedModeConfig[segment.key].enabled">
+          <div class="ml-6 space-y-3">
+            <div>
+              <label class="mb-1 block text-xs text-slate-400">播放时长范围（秒）</label>
+              <div class="flex items-center gap-2">
+                <InputNumber
+                  v-model="settings.fixedModeConfig[segment.key].timeRange.durationMin"
+                  :min="0"
+                  :max="60"
+                  :step="0.5"
+                  size="small"
+                  class="w-24"
+                />
+                <span class="text-xs text-slate-500">到</span>
+                <InputNumber
+                  v-model="settings.fixedModeConfig[segment.key].timeRange.durationMax"
+                  :min="0.5"
+                  :max="60"
+                  :step="0.5"
+                  size="small"
+                  class="w-24"
+                />
+                <span class="text-xs text-slate-500">秒</span>
+              </div>
+            </div>
+
+            <div>
+              <label class="mb-1 block text-xs text-slate-400">素材文件夹</label>
+              <div class="flex gap-2">
+                <InputText
+                  :model-value="settings.fixedModeConfig[segment.key].materialFolderPath"
+                  readonly
+                  size="small"
+                  class="flex-1"
+                  placeholder="请选择素材文件夹"
+                />
+                <Button
+                  label="选择"
+                  size="small"
+                  @click="onPickFolderForSegment(segment.key)"
+                />
+              </div>
+            </div>
+
+            <div>
+              <label class="mb-1 block text-xs text-slate-400">素材选择模式</label>
+              <SelectButton
+                v-model="settings.fixedModeConfig[segment.key].selectionMode"
+                :options="SELECTION_MODE_OPTIONS"
+                option-label="label"
+                option-value="value"
+                size="small"
+              />
+            </div>
+
+            <div
+              v-if="settings.fixedModeConfig[segment.key].selectionMode === 'specified'"
+            >
+              <label class="mb-1 block text-xs text-slate-400">素材库素材</label>
+              <div class="flex gap-2">
+                <InputText
+                  :model-value="fileNameFromPath(settings.fixedModeConfig[segment.key].specifiedMaterialPath)"
+                  readonly
+                  size="small"
+                  class="flex-1"
+                  placeholder="请选择素材库素材"
+                />
+                <Button
+                  label="素材库选择"
+                  size="small"
+                  @click="openMaterialPicker({ type: 'fixed-segment', segment: segment.key })"
+                />
+              </div>
+            </div>
+          </div>
+        </template>
+      </div>
+    </div>
+
+    <!-- 关键词模式 -->
+    <div v-else-if="settings.mode === 'keyword'" class="space-y-4">
+      <div class="text-sm font-medium text-slate-200">关键词模式配置</div>
+      <p class="text-xs text-slate-500">
+        关键词分组需在步骤 05 字幕设置中配置；此处为各分组指定混剪素材文件夹。
+      </p>
+      <div
+        v-if="!settings.keywordModeConfig.groups.length"
+        class="rounded-lg border border-dashed border-slate-700 py-8 text-center text-sm text-slate-500"
+      >
+        暂无关键词分组，请先在字幕步骤启用智能字幕并识别关键词
+      </div>
+      <div
+        v-for="group in settings.keywordModeConfig.groups"
+        :key="group.groupId"
+        class="space-y-3 rounded-lg border border-slate-700 p-4"
+      >
+        <label class="flex items-center gap-2">
+          <Checkbox v-model="group.enabled" binary />
+          <span class="font-medium text-slate-200">{{ group.groupName }}</span>
+          <span v-if="!group.enabled" class="text-xs text-slate-500">（未启用）</span>
+        </label>
+        <template v-if="group.enabled">
+          <div class="ml-6 space-y-3">
+            <div>
+              <label class="mb-1 block text-xs text-slate-400">素材文件夹</label>
+              <div class="flex gap-2">
+                <InputText
+                  :model-value="group.materialFolderPath"
+                  readonly
+                  size="small"
+                  class="flex-1"
+                  placeholder="请选择素材文件夹"
+                />
+                <Button
+                  label="选择"
+                  size="small"
+                  @click="onPickFolderForKeywordGroup(group.groupId)"
+                />
+              </div>
+            </div>
+            <div>
+              <label class="mb-1 block text-xs text-slate-400">素材选择模式</label>
+              <SelectButton
+                v-model="group.selectionMode"
+                :options="SELECTION_MODE_OPTIONS"
+                option-label="label"
+                option-value="value"
+                size="small"
+              />
+            </div>
+            <div v-if="group.selectionMode === 'specified'">
+              <label class="mb-1 block text-xs text-slate-400">素材库素材</label>
+              <div class="flex gap-2">
+                <InputText
+                  :model-value="fileNameFromPath(group.specifiedMaterialPath)"
+                  readonly
+                  size="small"
+                  class="flex-1"
+                />
+                <Button
+                  label="素材库选择"
+                  size="small"
+                  @click="openMaterialPicker({ type: 'keyword-group', groupId: group.groupId })"
+                />
+              </div>
+            </div>
+          </div>
+        </template>
+      </div>
+    </div>
+
+    <!-- 字幕模式 -->
+    <div v-else class="space-y-4">
+      <div class="text-sm font-medium text-slate-200">字幕模式配置</div>
+      <p class="mb-3 text-xs text-slate-500">
+        为每一行字幕（或多行字幕）指定插入的素材文件
+      </p>
+
+      <div class="flex flex-wrap items-center gap-2">
+        <Button
+          label="加载已识别字幕"
+          size="small"
+          :loading="loadingSubtitles"
+          @click="loadExistingSubtitleLines"
+        />
+        <span v-if="loadedLineCount" class="text-xs text-slate-500">
+          已加载 {{ loadedLineCount }} 行文案
+        </span>
+        <Button
+          v-if="hasSelectedLines"
+          label="给选中字幕选素材"
+          size="small"
+          outlined
+          @click="openMaterialPicker({ type: 'subtitle-line', lineIndex: Array.from(selectedLineIndices)[0] })"
+        />
+        <Button
+          v-if="hasSelectedLines"
+          label="清除选中"
+          size="small"
+          outlined
+          severity="secondary"
+          @click="selectedLineIndices = new Set()"
+        />
+        <Button
+          label="打开字幕文件"
+          size="small"
+          outlined
+          @click="onOpenSubtitleFile"
+        />
+      </div>
+
+      <p v-if="subtitleFilePath" class="mt-1 text-xs text-slate-500">
+        字幕文件：{{ subtitleFilePath }}
+      </p>
+      <p class="text-xs text-slate-500">
+        优先复用已生成字幕记录或 SRT，找不到时才会补生成字幕列表。
+      </p>
+
+      <div
+        v-if="records.length"
+        class="max-h-96 space-y-2 overflow-y-auto rounded-lg border border-slate-700 p-3"
+      >
+        <div class="mb-2 text-xs font-medium text-slate-400">为每行文案配置素材</div>
+        <div
+          v-for="(record, index) in records"
+          :key="index"
+          class="line-material-card rounded border border-slate-700/80 p-3 transition-colors hover:bg-slate-800/40"
+        >
+          <div class="flex items-start gap-3">
+            <Checkbox
+              :model-value="isLineSelected(index)"
+              binary
+              @update:model-value="(val) => toggleLineSelection(index, val)"
+            />
+            <div class="min-w-0 flex-1">
+              <div class="mb-1 flex items-center gap-2">
+                <span class="text-xs font-medium text-slate-500">第 {{ index + 1 }} 行</span>
+                <span class="font-mono text-xs text-blue-400">
+                  {{ formatRecordTimeRange(record.start, record.end) }}
+                </span>
+              </div>
+              <div class="mb-2 text-sm text-slate-200">{{ record.text }}</div>
+              <div
+                v-if="materialLabelForLine(index)"
+                class="flex items-center gap-1 text-xs text-emerald-400"
+              >
+                <i class="pi pi-check-circle" />
+                <span class="max-w-xs truncate">{{ materialLabelForLine(index) }}</span>
+                <Button
+                  icon="pi pi-times"
+                  size="small"
+                  text
+                  severity="danger"
+                  aria-label="删除素材"
+                  @click="onRemoveLineMaterial(index)"
+                />
+              </div>
+            </div>
+            <div class="flex flex-col gap-2">
+              <Button
+                label="素材库选择"
+                size="small"
+                @click="onPickLibraryForLine(index)"
+              />
+              <Button
+                label="本地文件"
+                size="small"
+                outlined
+                @click="onPickLocalForLine(index)"
+              />
+            </div>
+          </div>
+        </div>
+      </div>
+
+      <p v-else class="text-xs text-slate-500">
+        请先点击「加载已识别字幕」或「打开字幕文件」
+      </p>
+    </div>
+
+    <MixCutMaterialPickerDialog
+      v-model:visible="materialPickerVisible"
+      @select="onMaterialSelected"
+    />
+  </div>
+</template>

src/components/workflow/Step03VideoEdit.vue

@@ -3,6 +3,7 @@ import { computed, ref } from "vue";
 import { storeToRefs } from "pinia";
 import { useWorkflowStore } from "../../stores/workflow.js";
 import { revealLocalFileInFolder } from "../../services/fileExport.js";
+import MixCutSettingDialog from "./MixCutSettingDialog.vue";
 
 const workflow = useWorkflowStore();
 const {
@@ -51,7 +52,7 @@ async function onPickGreenScreen() {
 
 async function onPickPipMaterial() {
   feedback.value = { severity: "", message: "" };
-  showFeedback(await workflow.choosePipMaterial());
+  await workflow.choosePipMaterial();
 }
 
 async function onOpenVideoInExplorer() {
@@ -88,15 +89,15 @@ async function onOpenVideoInExplorer() {
         @click="onPickPipMaterial"
       />
 
-      <label class="flex items-center gap-2 text-sm text-slate-200">
+      <!-- <label class="flex items-center gap-2 text-sm text-slate-200">
         <Checkbox v-model="autoCutBreath" binary />
         自动剪气口
-      </label>
+      </label> -->
 
-      <label class="flex items-center gap-2 text-sm text-slate-200">
+      <!-- <label class="flex items-center gap-2 text-sm text-slate-200">
         <Checkbox v-model="greenScreen" binary />
         启动绿幕切换
-      </label>
+      </label> -->
       <div v-if="greenScreen" class="flex flex-col gap-1 pl-6">
         <Button
           :label="greenScreenFileName ? '重新选择背景图' : '上传替换图片'"
@@ -161,4 +162,6 @@ async function onOpenVideoInExplorer() {
       </div>
     </div>
   </DashboardCard>
+
+  <MixCutSettingDialog @feedback="showFeedback" />
 </template>

src/services/mixCutSettings.js

@@ -0,0 +1,379 @@
+import { invoke } from "@tauri-apps/api/core";
+import { convertFileSrc } from "@tauri-apps/api/core";
+import { open } from "@tauri-apps/plugin-dialog";
+
+import { listMaterials } from "./materialDb.js";
+import {
+  createDefaultMixCutSettings,
+  normalizeMixCutSettings,
+} from "../utils/mixCutDefaults.js";
+import { parseSrtToRecords } from "../utils/srtParser.js";
+
+export const MIX_CUT_CONFIG_KEY = "videoMixCutSettings";
+
+const IMAGE_EXT = new Set(["jpg", "jpeg", "png", "webp", "bmp", "gif"]);
+
+/**
+ * @returns {Promise<object>}
+ */
+export async function loadVideoMixCutSettings() {
+  try {
+    const rows = await invoke("list_local_app_config");
+    const row = Array.isArray(rows)
+      ? rows.find((r) => r.name === MIX_CUT_CONFIG_KEY)
+      : null;
+    if (!row?.value) return createDefaultMixCutSettings();
+    return normalizeMixCutSettings(JSON.parse(row.value));
+  } catch {
+    return createDefaultMixCutSettings();
+  }
+}
+
+/**
+ * @param {object} settings
+ */
+export async function saveVideoMixCutSettings(settings) {
+  const payload = normalizeMixCutSettings(settings);
+  await invoke("set_local_app_config", {
+    name: MIX_CUT_CONFIG_KEY,
+    value: JSON.stringify(payload),
+  });
+  return payload;
+}
+
+/**
+ * @param {string} filePath
+ */
+export function isImageMaterialPath(filePath) {
+  const ext = String(filePath || "")
+    .split(".")
+    .pop()
+    ?.toLowerCase();
+  return IMAGE_EXT.has(ext || "");
+}
+
+/**
+ * @param {string} filePath
+ * @returns {Promise<string>}
+ */
+async function readTextFile(filePath) {
+  const url = convertFileSrc(filePath);
+  const res = await fetch(url);
+  if (!res.ok) {
+    throw new Error(`读取文件失败 (${res.status})`);
+  }
+  return res.text();
+}
+
+/**
+ * @param {string} script
+ * @param {number} durationSec
+ * @returns {Array<{ text: string, start: number, end: number }>}
+ */
+export function recordsFromScriptEvenly(script, durationSec) {
+  const lines = String(script || "")
+    .split(/(?<=[。！？.!?])\s*|\n+/)
+    .map((s) => s.trim())
+    .filter(Boolean);
+  if (!lines.length) return [];
+
+  const totalMs = Math.max(Math.round(durationSec * 1000), lines.length * 1500);
+  const step = totalMs / lines.length;
+  return lines.map((text, i) => ({
+    text,
+    start: Math.round(i * step),
+    end: Math.round((i + 1) * step),
+  }));
+}
+
+/**
+ * @param {object} options
+ * @param {ReturnType<typeof import('../stores/workflow.js').useWorkflowStore>} options.store
+ * @param {object} [options.existingSettings]
+ */
+export async function loadMixCutSubtitleRecords({ store, existingSettings }) {
+  const settings = existingSettings || (await loadVideoMixCutSettings());
+
+  if (Array.isArray(settings.records) && settings.records.length) {
+    return {
+      ok: true,
+      records: settings.records,
+      srtPath: settings.subtitleFilePath || store.subtitleSrtPath || "",
+      source: "config",
+    };
+  }
+
+  const srtCandidates = [
+    settings.subtitleFilePath,
+    store.subtitleSrtPath,
+  ].filter(Boolean);
+
+  for (const srtPath of srtCandidates) {
+    try {
+      const content = await readTextFile(srtPath);
+      const records = parseSrtToRecords(content);
+      if (records.length) {
+        return { ok: true, records, srtPath, source: "srt" };
+      }
+    } catch {
+      /* try next */
+    }
+  }
+
+  const videoPath = String(store.generatedVideoPath || "").trim();
+  const script = String(store.scriptContent || "").trim();
+
+  if (script && videoPath) {
+    try {
+      const durationSec = await invoke("get_media_duration_seconds", {
+        path: videoPath,
+      });
+      const records = recordsFromScriptEvenly(script, Number(durationSec) || 30);
+      if (records.length) {
+        return {
+          ok: true,
+          records,
+          srtPath: "",
+          source: "script",
+          message: "已根据文案与视频时长生成字幕行（无 ASR 时间轴）",
+        };
+      }
+    } catch {
+      /* fall through */
+    }
+  }
+
+  if (videoPath) {
+    try {
+      const result = await invoke("run_nodejs_script", {
+        scriptName: "subtitle_bgm_generate.js",
+        params: {
+          inputVideo: videoPath,
+          autoSubtitle: true,
+          smartSubtitle: Boolean(store.smartSubtitle),
+          scriptContent: script,
+          recognizeOnly: true,
+          bgmEnabled: false,
+        },
+      });
+      if (result?.success && Array.isArray(result.records) && result.records.length) {
+        return {
+          ok: true,
+          records: result.records,
+          srtPath: result.srtPath || "",
+          source: "asr",
+        };
+      }
+      return {
+        ok: false,
+        message: String(result?.error || "字幕识别失败，请检查模型配置"),
+      };
+    } catch (err) {
+      const msg = err instanceof Error ? err.message : String(err);
+      return { ok: false, message: `加载字幕失败：${msg}` };
+    }
+  }
+
+  return {
+    ok: false,
+    message: "未找到字幕数据，请先在步骤 02 生成视频或打开字幕文件",
+  };
+}
+
+/**
+ * @returns {Promise<{ ok: boolean, records?: object[], srtPath?: string, message?: string }>}
+ */
+export async function openSubtitleFileAndParse() {
+  const selected = await open({
+    multiple: false,
+    filters: [{ name: "字幕文件", extensions: ["srt", "txt"] }],
+  });
+  if (selected == null) return { ok: false, message: "" };
+  const path = Array.isArray(selected) ? selected[0] : String(selected);
+  if (!path) return { ok: false, message: "" };
+
+  try {
+    const content = await readTextFile(path);
+    const records = parseSrtToRecords(content);
+    if (!records.length) {
+      return { ok: false, message: "字幕文件中没有有效内容" };
+    }
+    return { ok: true, records, srtPath: path };
+  } catch (err) {
+    const msg = err instanceof Error ? err.message : String(err);
+    return { ok: false, message: `读取字幕文件失败：${msg}` };
+  }
+}
+
+/**
+ * @returns {Promise<string | null>}
+ */
+export async function pickLocalMixCutMaterial() {
+  const selected = await open({
+    multiple: false,
+    filters: [
+      {
+        name: "视频或图片",
+        extensions: ["mp4", "mov", "webm", "mkv", "m4v", "jpg", "jpeg", "png", "webp", "gif"],
+      },
+    ],
+  });
+  if (selected == null) return null;
+  if (Array.isArray(selected)) return selected[0] || null;
+  return String(selected);
+}
+
+/**
+ * @returns {Promise<string | null>}
+ */
+export async function pickMaterialFolder() {
+  const selected = await open({ directory: true, multiple: false });
+  if (selected == null) return null;
+  if (Array.isArray(selected)) return selected[0] || null;
+  return String(selected);
+}
+
+/**
+ * @returns {Promise<Array<{ id: number, name: string, path: string, type: string }>>}
+ */
+export async function listMixCutMaterialLibrary() {
+  return listMaterials();
+}
+
+/**
+ * @param {object} settings
+ * @param {object} globalDisplay
+ */
+export function applyGlobalDisplayToAllMaterials(settings, globalDisplay) {
+  const g = globalDisplay;
+  const patch = {
+    displayMode: g.displayMode,
+    pipPosition: g.pipPosition,
+    pipSizePercent: g.pipSizePercent,
+    pipScaleMode: g.pipScaleMode,
+    originalVideoMinimized: { ...g.originalVideoMinimized },
+  };
+
+  ["opening", "middle", "ending"].forEach((key) => {
+    Object.assign(settings.fixedModeConfig[key], patch);
+  });
+
+  settings.keywordModeConfig.groups.forEach((group) => {
+    Object.assign(group, patch);
+  });
+
+  settings.subtitleModeConfig.mappings.forEach((mapping) => {
+    Object.assign(mapping, patch);
+  });
+}
+
+/**
+ * @param {object} settings
+ * @param {number} lineIndex
+ * @returns {object | null}
+ */
+export function findMappingForLine(settings, lineIndex) {
+  return (
+    settings.subtitleModeConfig.mappings.find((m) =>
+      Array.isArray(m.subtitleIndices) && m.subtitleIndices.includes(lineIndex),
+    ) || null
+  );
+}
+
+/**
+ * @param {object} settings
+ * @param {number} lineIndex
+ * @param {string} materialPath
+ */
+export function bindMaterialToSubtitleLine(settings, lineIndex, materialPath) {
+  const mappings = settings.subtitleModeConfig.mappings;
+  const existing = findMappingForLine(settings, lineIndex);
+  const isImage = isImageMaterialPath(materialPath);
+
+  if (existing) {
+    existing.materialPath = materialPath;
+    existing.isImage = isImage;
+    existing.selectionMode = "specified";
+    return existing;
+  }
+
+  const filtered = mappings.filter(
+    (m) => !Array.isArray(m.subtitleIndices) || !m.subtitleIndices.includes(lineIndex),
+  );
+  const created = {
+    subtitleIndices: [lineIndex],
+    materialPath,
+    isImage,
+    selectionMode: "specified",
+    displayMode: settings.displayMode || "fullscreen",
+    pipPosition: "bottom-right",
+    pipSizePercent: 30,
+    pipScaleMode: "fit",
+    originalVideoMinimized: {
+      enabled: false,
+      shape: "square",
+      position: "bottom-right",
+      sizePercent: 25,
+    },
+  };
+  filtered.push(created);
+  settings.subtitleModeConfig.mappings = filtered;
+  return created;
+}
+
+/**
+ * @param {object} settings
+ * @param {number[]} lineIndices
+ * @param {string} materialPath
+ */
+export function bindMaterialToSubtitleLines(settings, lineIndices, materialPath) {
+  const indices = [...new Set(lineIndices)].sort((a, b) => a - b);
+  if (!indices.length) return;
+
+  settings.subtitleModeConfig.mappings = settings.subtitleModeConfig.mappings.filter(
+    (m) => !m.subtitleIndices?.some((idx) => indices.includes(idx)),
+  );
+
+  const isImage = isImageMaterialPath(materialPath);
+  settings.subtitleModeConfig.mappings.push({
+    subtitleIndices: indices,
+    materialPath,
+    isImage,
+    selectionMode: "specified",
+    displayMode: settings.displayMode || "fullscreen",
+    pipPosition: "bottom-right",
+    pipSizePercent: 30,
+    pipScaleMode: "fit",
+    originalVideoMinimized: {
+      enabled: false,
+      shape: "square",
+      position: "bottom-right",
+      sizePercent: 25,
+    },
+  });
+}
+
+/**
+ * @param {object} settings
+ * @param {number} lineIndex
+ */
+export function removeMaterialFromSubtitleLine(settings, lineIndex) {
+  settings.subtitleModeConfig.mappings = settings.subtitleModeConfig.mappings.filter(
+    (m) => !m.subtitleIndices?.includes(lineIndex),
+  );
+}
+
+/**
+ * @param {object} settings
+ */
+export function prepareMixCutSettingsForSave(settings, globalDisplay) {
+  const next = normalizeMixCutSettings(settings);
+  next.fixedModeConfig.enabled = next.mode === "fixed";
+  next.keywordModeConfig.enabled = next.mode === "keyword";
+  next.subtitleModeConfig.enabled = next.mode === "subtitle";
+  next.displayMode = globalDisplay.displayMode;
+  if (next.enabled && next.subtitleModeConfig.mappings.some((m) => m.materialPath)) {
+    next.simplePip = undefined;
+  }
+  return next;
+}

src/services/videoEditProcess.js

@@ -5,43 +5,16 @@ import { clearSubtitlePreview } from "./subtitleBgmGenerate.js";
 import { importGeneratedVideo } from "./videoDb.js";
 import { localVideoToPlayableUrl } from "./localVideo.js";
 
+import { loadVideoMixCutSettings as loadMixCutFromService } from "./mixCutSettings.js";
+
 const VIDEO_EDIT_SCRIPT = "video_edit_process.js";
-const MIX_CUT_CONFIG_KEY = "videoMixCutSettings";
 
 /**
  * 从本地 SQLite 配置读取混剪设置（对齐 Electron videoMixCutSettings）
  * @returns {Promise<object | null>}
  */
 export async function loadVideoMixCutSettings() {
-  try {
+  return loadMixCutFromService();
-    const rows = await invoke("list_local_app_config");
-    const row = Array.isArray(rows)
-      ? rows.find((r) => r.name === MIX_CUT_CONFIG_KEY)
-      : null;
-    if (!row?.value) return null;
-    return JSON.parse(row.value);
-  } catch {
-    return null;
-  }
-}
-
-/**
- * 保存/合并 simplePip 到本地混剪配置
- * @param {object} simplePip
- */
-export async function saveSimplePipConfig(simplePip) {
-  const existing = (await loadVideoMixCutSettings()) || {};
-  const next = {
-    ...existing,
-    enabled: true,
-    displayMode: existing.displayMode || "pip",
-    simplePip,
-  };
-  await invoke("set_local_app_config", {
-    name: MIX_CUT_CONFIG_KEY,
-    value: JSON.stringify(next),
-  });
-  return next;
 }
 
 /**
@@ -63,25 +36,6 @@ export async function pickGreenScreenBackground() {
   return String(selected);
 }
 
-/**
- * 选择画中画素材（视频或图片）
- * @returns {Promise<string | null>}
- */
-export async function pickPipMaterial() {
-  const selected = await open({
-    multiple: false,
-    filters: [
-      {
-        name: "视频或图片",
-        extensions: ["mp4", "mov", "webm", "mkv", "m4v", "jpg", "jpeg", "png", "webp"],
-      },
-    ],
-  });
-  if (selected == null) return null;
-  if (Array.isArray(selected)) return selected[0] || null;
-  return String(selected);
-}
-
 function formatHistoryTime() {
   const d = new Date();
   const p = (n) => String(n).padStart(2, "0");
@@ -109,14 +63,32 @@ export async function executeAutoProcessVideo(store) {
   let mixCutSettings = null;
   if (store.pipInPicture) {
     mixCutSettings = await loadVideoMixCutSettings();
+    mixCutSettings = { ...mixCutSettings, enabled: true };
     const hasReplacements =
       Array.isArray(mixCutSettings?.replacements) &&
       mixCutSettings.replacements.length > 0;
     const hasSimple = Boolean(mixCutSettings?.simplePip?.materialPath);
-    if (!hasReplacements && !hasSimple) {
+    const hasSubtitleMappings =
+      Array.isArray(mixCutSettings?.subtitleModeConfig?.mappings) &&
+      mixCutSettings.subtitleModeConfig.mappings.some((m) => m.materialPath);
+    const hasFixedSegments =
+      mixCutSettings?.mode === "fixed" &&
+      mixCutSettings?.fixedModeConfig?.enabled &&
+      ["opening", "middle", "ending"].some(
+        (key) =>
+          mixCutSettings.fixedModeConfig[key]?.enabled &&
+          (mixCutSettings.fixedModeConfig[key]?.materialFolderPath ||
+            mixCutSettings.fixedModeConfig[key]?.specifiedMaterialPath),
+      );
+    if (
+      !hasReplacements &&
+      !hasSimple &&
+      !hasSubtitleMappings &&
+      !hasFixedSegments
+    ) {
       return {
         ok: false,
-        message: "已启用画中画，请先点击「选择画中画素材」",
+        message: "已启用画中画，请先点击「选择画中画素材」并完成配置",
       };
     }
   }

src/stores/workflow.js

@@ -28,8 +28,6 @@ import {
 import {
   executeAutoProcessVideo,
   pickGreenScreenBackground,
-  pickPipMaterial,
-  saveSimplePipConfig,
 } from "../services/videoEditProcess.js";
 import { executeGenerateTitleTags } from "../services/titleTagsGenerate.js";
 import {
@@ -222,6 +220,9 @@ export const useWorkflowStore = defineStore("workflow", {
     /** 绿幕替换背景图本地路径 */
     greenScreenBackgroundPath: "",
 
+    /** 画中画混剪设置弹窗 */
+    mixCutModalVisible: false,
+
     /** 编辑后视频（与 generated 同步更新，便于后续步骤区分） */
     processedVideoPath: "",
 
@@ -583,6 +584,14 @@ export const useWorkflowStore = defineStore("workflow", {
 
     },
 
+    openMixCutDialog() {
+      this.mixCutModalVisible = true;
+    },
+
+    closeMixCutDialog() {
+      this.mixCutModalVisible = false;
+    },
+
     selectVoice(voiceId) {
 
       this.selectedVoiceId = voiceId;
@@ -652,18 +661,8 @@ export const useWorkflowStore = defineStore("workflow", {
     },
 
     async choosePipMaterial() {
-      const path = await pickPipMaterial();
+      this.openMixCutDialog();
-      if (!path) return { ok: false, message: "" };
+      return { ok: true, message: "" };
-      await saveSimplePipConfig({
-        materialPath: path,
-        startTime: 0,
-        displayMode: "pip",
-        pipPosition: "bottom-right",
-        pipSizePercent: 30,
-        pipScaleMode: "fit",
-      });
-      this.pipInPicture = true;
-      return { ok: true, message: "已选择画中画素材" };
     },
 
     async generateTitleTags() {

src/utils/mixCutDefaults.js

@@ -0,0 +1,213 @@
+/** @typedef {'subtitle' | 'fixed' | 'keyword'} MixCutMode */
+
+/**
+ * @returns {{ enabled: boolean, shape: string, position: string, sizePercent: number }}
+ */
+export function createDefaultOriginalVideoMinimized() {
+  return {
+    enabled: false,
+    shape: "square",
+    position: "bottom-right",
+    sizePercent: 25,
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultSegmentConfig() {
+  return {
+    enabled: false,
+    timeRange: { durationMin: 2, durationMax: 5 },
+    materialFolderPath: "",
+    specifiedMaterialPath: "",
+    selectionMode: "random",
+    displayMode: "fullscreen",
+    pipPosition: "bottom-right",
+    pipSizePercent: 30,
+    pipScaleMode: "fit",
+    originalVideoMinimized: createDefaultOriginalVideoMinimized(),
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultFixedModeConfig() {
+  return {
+    enabled: false,
+    opening: createDefaultSegmentConfig(),
+    middle: {
+      ...createDefaultSegmentConfig(),
+      pipPosition: "bottom-left",
+      pipSizePercent: 40,
+    },
+    ending: createDefaultSegmentConfig(),
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultKeywordGroup(groupId, groupName) {
+  return {
+    groupId,
+    groupName,
+    enabled: false,
+    materialFolderPath: "",
+    specifiedMaterialPath: "",
+    selectionMode: "random",
+    durationMin: 2,
+    durationMax: 5,
+    displayMode: "fullscreen",
+    pipPosition: "bottom-right",
+    pipSizePercent: 30,
+    pipScaleMode: "fit",
+    originalVideoMinimized: createDefaultOriginalVideoMinimized(),
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultKeywordModeConfig() {
+  return {
+    enabled: false,
+    groups: [],
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultSubtitleModeConfig() {
+  return {
+    enabled: false,
+    mappings: [],
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultGlobalDisplay() {
+  return {
+    displayMode: "fullscreen",
+    pipPosition: "bottom-right",
+    pipSizePercent: 30,
+    pipScaleMode: "fit",
+    originalVideoMinimized: createDefaultOriginalVideoMinimized(),
+  };
+}
+
+/**
+ * @returns {object}
+ */
+export function createDefaultMixCutSettings() {
+  return {
+    enabled: false,
+    mode: "subtitle",
+    displayMode: "pip",
+    records: [],
+    subtitleFilePath: "",
+    fixedModeConfig: createDefaultFixedModeConfig(),
+    keywordModeConfig: createDefaultKeywordModeConfig(),
+    subtitleModeConfig: createDefaultSubtitleModeConfig(),
+  };
+}
+
+/**
+ * @param {object | null | undefined} raw
+ */
+export function normalizeMixCutSettings(raw) {
+  const base = createDefaultMixCutSettings();
+  if (!raw || typeof raw !== "object") return base;
+
+  const mergeSegment = (target, source) => {
+    if (!source || typeof source !== "object") return target;
+    return {
+      ...target,
+      ...source,
+      timeRange: { ...target.timeRange, ...(source.timeRange || {}) },
+      originalVideoMinimized: {
+        ...target.originalVideoMinimized,
+        ...(source.originalVideoMinimized || {}),
+      },
+    };
+  };
+
+  const fixed = createDefaultFixedModeConfig();
+  const fixedRaw = raw.fixedModeConfig || {};
+  fixed.enabled = Boolean(fixedRaw.enabled);
+  fixed.opening = mergeSegment(fixed.opening, fixedRaw.opening);
+  fixed.middle = mergeSegment(fixed.middle, fixedRaw.middle);
+  fixed.ending = mergeSegment(fixed.ending, fixedRaw.ending);
+
+  const keyword = createDefaultKeywordModeConfig();
+  const keywordRaw = raw.keywordModeConfig || {};
+  keyword.enabled = Boolean(keywordRaw.enabled);
+  keyword.groups = Array.isArray(keywordRaw.groups)
+    ? keywordRaw.groups.map((g, i) => ({
+        ...createDefaultKeywordGroup(g.groupId || `group_${i}`, g.groupName || `分组 ${i + 1}`),
+        ...g,
+        originalVideoMinimized: {
+          ...createDefaultOriginalVideoMinimized(),
+          ...(g.originalVideoMinimized || {}),
+        },
+      }))
+    : [];
+
+  const subtitle = createDefaultSubtitleModeConfig();
+  const subtitleRaw = raw.subtitleModeConfig || {};
+  subtitle.enabled = Boolean(subtitleRaw.enabled);
+  subtitle.mappings = Array.isArray(subtitleRaw.mappings)
+    ? subtitleRaw.mappings.map((m) => ({
+        ...m,
+        subtitleIndices: Array.isArray(m.subtitleIndices) ? [...m.subtitleIndices] : [],
+        originalVideoMinimized: {
+          ...createDefaultOriginalVideoMinimized(),
+          ...(m.originalVideoMinimized || {}),
+        },
+      }))
+    : [];
+
+  return {
+    ...base,
+    ...raw,
+    enabled: Boolean(raw.enabled),
+    mode: raw.mode === "fixed" || raw.mode === "keyword" ? raw.mode : "subtitle",
+    displayMode: raw.displayMode === "fullscreen" ? "fullscreen" : "pip",
+    records: Array.isArray(raw.records) ? raw.records : [],
+    subtitleFilePath: String(raw.subtitleFilePath || ""),
+    fixedModeConfig: fixed,
+    keywordModeConfig: keyword,
+    subtitleModeConfig: subtitle,
+    simplePip: raw.simplePip,
+  };
+}
+
+export const PIP_POSITION_OPTIONS = [
+  { label: "左上角", value: "top-left" },
+  { label: "顶部居中", value: "top-center" },
+  { label: "右上角", value: "top-right" },
+  { label: "左侧居中", value: "center-left" },
+  { label: "正中间", value: "center" },
+  { label: "右侧居中", value: "center-right" },
+  { label: "左下角", value: "bottom-left" },
+  { label: "底部居中", value: "bottom-center" },
+  { label: "右下角", value: "bottom-right" },
+];
+
+export const MINIMIZED_POSITION_OPTIONS = [
+  { label: "左上角", value: "top-left" },
+  { label: "右上角", value: "top-right" },
+  { label: "左下角", value: "bottom-left" },
+  { label: "右下角", value: "bottom-right" },
+  { label: "正中间", value: "center" },
+];
+
+export const SELECTION_MODE_OPTIONS = [
+  { label: "随机", value: "random" },
+  { label: "顺序", value: "sequential" },
+  { label: "指定素材", value: "specified" },
+];

src/utils/srtParser.js

@@ -0,0 +1,72 @@
+/**
+ * 解析 SRT 字幕为混剪 records（start/end 单位：毫秒）
+ * @param {string} content
+ * @returns {Array<{ text: string, start: number, end: number }>}
+ */
+export function parseSrtToRecords(content) {
+  const text = String(content || "").replace(/\uFEFF/g, "").trim();
+  if (!text) return [];
+
+  const blocks = text.split(/\n\s*\n+/);
+  const records = [];
+
+  for (const block of blocks) {
+    const lines = block.split(/\r?\n/).map((l) => l.trim()).filter(Boolean);
+    if (lines.length < 2) continue;
+
+    let timeLineIdx = 0;
+    if (/^\d+$/.test(lines[0])) {
+      timeLineIdx = 1;
+    }
+    const timeLine = lines[timeLineIdx];
+    if (!timeLine || !timeLine.includes("-->")) continue;
+
+    const [startRaw, endRaw] = timeLine.split("-->").map((s) => s.trim());
+    const start = parseSrtTimeToMs(startRaw);
+    const end = parseSrtTimeToMs(endRaw);
+    const body = lines.slice(timeLineIdx + 1).join("\n").trim();
+    if (!body || !Number.isFinite(start) || !Number.isFinite(end)) continue;
+
+    records.push({
+      text: body.replace(/<[^>]+>/g, ""),
+      start,
+      end: Math.max(end, start + 200),
+    });
+  }
+
+  return records;
+}
+
+/**
+ * @param {string} raw
+ * @returns {number}
+ */
+function parseSrtTimeToMs(raw) {
+  const m = String(raw || "").trim().match(
+    /(?:(\d+):)?(\d{2}):(\d{2})[.,](\d{1,3})/,
+  );
+  if (!m) return NaN;
+  const h = Number(m[1] || 0);
+  const min = Number(m[2]);
+  const sec = Number(m[3]);
+  const msPart = String(m[4]).padEnd(3, "0").slice(0, 3);
+  return h * 3600000 + min * 60000 + sec * 1000 + Number(msPart);
+}
+
+/**
+ * @param {number} ms
+ * @returns {string}
+ */
+export function formatRecordTimeRange(msStart, msEnd) {
+  return `${formatShortTime(msStart)} - ${formatShortTime(msEnd)}`;
+}
+
+/**
+ * @param {number} ms
+ */
+function formatShortTime(ms) {
+  const totalSec = Math.max(0, ms) / 1000;
+  const min = Math.floor(totalSec / 60);
+  const sec = totalSec - min * 60;
+  return `${min}:${sec.toFixed(1)}`;
+}