diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoCreateTaskDialog.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoCreateTaskDialog.vue
new file mode 100644
index 00000000..d88eafb0
--- /dev/null
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoCreateTaskDialog.vue
@@ -0,0 +1,54 @@
+<!-- SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite. -->
+<!-- Responsibility: new root/subtask/continue task dialog — never a resident create box on the main layout. -->
+
+<script setup lang="ts">
+defineProps<{
+  show: boolean;
+  newTitle: string;
+  newBody: string;
+  loading: boolean;
+  error: string | null;
+  hasSelectedTask: boolean;
+}>();
+
+const emit = defineEmits<{
+  close: [];
+  "update:newTitle": [value: string];
+  "update:newBody": [value: string];
+  create: [kind: "root" | "subtask" | "continue"];
+}>();
+</script>
+
+<template>
+  <div v-if="show" class="modal-backdrop" data-testid="mdtodo-task-create-dialog" role="dialog" aria-modal="true" aria-label="新建 MDTODO 任务" @click.self="emit('close')">
+    <section class="mdtodo-dialog task-create-dialog">
+      <header><h2>新建任务</h2><button class="icon-button" type="button" aria-label="关闭新建任务" @click="emit('close')">×</button></header>
+      <div class="task-create-box">
+        <label><span>New task</span><input :value="newTitle" data-testid="mdtodo-new-title" :disabled="loading" placeholder="新任务标题" @input="emit('update:newTitle', ($event.target as HTMLInputElement).value)" /></label>
+        <textarea :value="newBody" data-testid="mdtodo-new-body" :disabled="loading" rows="5" placeholder="新任务正文，可留空。" @input="emit('update:newBody', ($event.target as HTMLTextAreaElement).value)" />
+        <div class="editor-actions">
+          <button class="btn btn-secondary" type="button" data-testid="mdtodo-add-root" :disabled="loading" @click="emit('create', 'root')">新增根任务</button>
+          <button class="btn btn-secondary" type="button" data-testid="mdtodo-add-subtask" :disabled="loading || !hasSelectedTask" @click="emit('create', 'subtask')">新增子任务</button>
+          <button class="btn btn-secondary" type="button" data-testid="mdtodo-continue-task" :disabled="loading || !hasSelectedTask" @click="emit('create', 'continue')">延续同级</button>
+        </div>
+        <p v-if="error" class="source-error" data-testid="mdtodo-task-mutation-error">{{ error }}</p>
+      </div>
+    </section>
+  </div>
+</template>
+
+<style scoped>
+.modal-backdrop { position: fixed; z-index: 60; inset: 0; display: grid; place-items: start center; overflow: auto; background: rgba(15, 23, 42, 0.38); padding: 8dvh 16px 32px; }
+.mdtodo-dialog { display: grid; width: min(720px, calc(100vw - 32px)); gap: 14px; border: 1px solid #cbd8d2; border-radius: 8px; background: #fff; color: #14211d; padding: 16px; box-shadow: 0 24px 60px rgba(15, 23, 42, 0.22); }
+.mdtodo-dialog header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
+.mdtodo-dialog h2 { margin: 0; font-size: 18px; }
+.icon-button { display: inline-grid; width: 36px; height: 36px; place-items: center; border: 1px solid #cbd8d2; border-radius: 6px; background: #fff; color: #14211d; font-weight: 850; }
+.task-create-dialog { width: min(620px, calc(100vw - 32px)); }
+.task-create-box { display: grid; gap: 8px; border-top: 1px solid #e2ece8; padding-top: 10px; }
+.task-create-box label { display: grid; min-width: 0; gap: 5px; color: #52615c; font-size: 12px; font-weight: 800; }
+.task-create-box input, .task-create-box textarea { width: 100%; min-width: 0; border: 1px solid #cbd8d4; border-radius: 6px; background: #fff; color: #14211d; font: inherit; line-height: 1.4; padding: 8px 9px; }
+.task-create-box textarea { resize: vertical; }
+.editor-actions { display: flex; flex-wrap: wrap; gap: 8px; }
+.source-error { margin: 0; border: 1px solid #fecaca; background: #fef2f2; color: #991b1b; border-radius: 6px; padding: 8px 10px; font-size: 13px; }
+</style>
+
diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoInfoDialog.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoInfoDialog.vue
new file mode 100644
index 00000000..2a93d881
--- /dev/null
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoInfoDialog.vue
@@ -0,0 +1,80 @@
+<!-- SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite. -->
+<!-- Responsibility: collapse Source/TaskRef/File/Updated/counts/diagnostics/link metadata into an info dialog. -->
+
+<script setup lang="ts">
+import type { MdtodoFileRecord, MdtodoTaskRecord, MdtodoTaskPage, ProjectSource, ProjectWorkbenchLinkRecord, ProjectNavigationResponse } from "@/api";
+import { displayDate, shortRef } from "@/composables/mdtodo/useMdtodoDisplay";
+
+defineProps<{
+  show: boolean;
+  sources: ProjectSource[];
+  selectedSource: ProjectSource | null;
+  selectedSourceId: string | null;
+  selectedFile: MdtodoFileRecord | null;
+  selectedFileRef: string | null;
+  selectedFileName: string;
+  selectedTask: MdtodoTaskRecord | null;
+  links: ProjectWorkbenchLinkRecord[];
+  taskPage: MdtodoTaskPage | null;
+  fileScopedTaskCount: number;
+  taskStatusCounts: Record<string, number>;
+  navigation: ProjectNavigationResponse | null;
+}>();
+
+const emit = defineEmits<{ close: [] }>();
+
+function workbenchLaunchEnabledLabel(navigation: ProjectNavigationResponse | null): string {
+  return navigation?.navigation?.capabilities?.workbenchLaunch === true ? "launch enabled" : "launch unavailable";
+}
+</script>
+
+<template>
+  <div v-if="show" class="modal-backdrop" data-testid="mdtodo-info-popover" role="dialog" aria-modal="true" aria-label="MDTODO 摘要" @click.self="emit('close')">
+    <section class="mdtodo-dialog mdtodo-info-dialog">
+      <header><h2>MDTODO 摘要</h2><button class="icon-button" type="button" aria-label="关闭摘要" @click="emit('close')">×</button></header>
+      <dl class="summary-list">
+        <div><dt>Source</dt><dd>{{ sources.length }} / {{ selectedSource?.displayName || selectedSourceId || '-' }}</dd></div>
+        <div><dt>Source ID</dt><dd><code>{{ selectedSourceId || '-' }}</code></dd></div>
+        <div><dt>Source Status</dt><dd>{{ selectedSource?.status || '-' }}</dd></div>
+        <div><dt>File</dt><dd>{{ selectedFile?.relativePath || selectedFileName }}</dd></div>
+        <div><dt>File Ref</dt><dd><code>{{ selectedFileRef || '-' }}</code></dd></div>
+        <div><dt>File Fingerprint</dt><dd><code>{{ shortRef(selectedFile?.fingerprint) }}</code></dd></div>
+        <div><dt>Task</dt><dd>{{ selectedTask?.taskId || '-' }} {{ selectedTask?.title || '' }}</dd></div>
+        <div><dt>TaskRef</dt><dd><code>{{ shortRef(selectedTask?.taskRef) }}</code></dd></div>
+        <div><dt>Status</dt><dd>{{ selectedTask?.status || '-' }}</dd></div>
+        <div><dt>Updated</dt><dd>{{ displayDate(selectedTask?.updatedAt) }}</dd></div>
+        <div><dt>Tasks</dt><dd>待办 {{ taskStatusCounts.open || 0 }} / 进行中 {{ taskStatusCounts.in_progress || 0 }} / 完成 {{ taskStatusCounts.done || 0 }} / 阻塞 {{ taskStatusCounts.blocked || 0 }}<span v-if="taskPage?.hasMore"> · window {{ taskPage.limit }}</span></dd></div>
+        <div><dt>File Tasks</dt><dd>{{ fileScopedTaskCount }}<span v-if="taskPage?.total != null"> / {{ taskPage.total }} total</span></dd></div>
+        <div><dt>Workbench Links</dt><dd>{{ links.length }} / {{ workbenchLaunchEnabledLabel(navigation) }}</dd></div>
+        <div v-if="links.length" class="info-links">
+          <dt>Link Sessions</dt>
+          <dd>
+            <ul class="info-link-list">
+              <li v-for="link in links.slice(0, 8)" :key="link.linkId">
+                <strong>{{ link.sessionId || link.linkId }}</strong>
+                <small>{{ shortRef(link.traceId || link.taskRef || link.projectId) }}</small>
+              </li>
+            </ul>
+          </dd>
+        </div>
+      </dl>
+    </section>
+  </div>
+</template>
+
+<style scoped>
+.modal-backdrop { position: fixed; z-index: 60; inset: 0; display: grid; place-items: start center; overflow: auto; background: rgba(15, 23, 42, 0.38); padding: 8dvh 16px 32px; }
+.mdtodo-dialog { display: grid; width: min(720px, calc(100vw - 32px)); gap: 14px; border: 1px solid #cbd8d2; border-radius: 8px; background: #fff; color: #14211d; padding: 16px; box-shadow: 0 24px 60px rgba(15, 23, 42, 0.22); }
+.mdtodo-dialog header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
+.mdtodo-dialog h2 { margin: 0; font-size: 18px; }
+.icon-button { display: inline-grid; width: 36px; height: 36px; place-items: center; border: 1px solid #cbd8d2; border-radius: 6px; background: #fff; color: #14211d; font-weight: 850; }
+.summary-list { display: grid; gap: 8px; margin: 0; }
+.summary-list > div { display: grid; gap: 4px; border-bottom: 1px solid #e2e8f0; padding-bottom: 8px; }
+.summary-list dt { color: #64706b; font-size: 11px; font-weight: 800; text-transform: uppercase; }
+.summary-list dd { min-width: 0; margin: 0; overflow-wrap: anywhere; color: #14211d; font-size: 13px; }
+.summary-list code { color: #0f766e; font-size: 12px; }
+.info-link-list { display: grid; gap: 6px; margin: 0; padding: 0; list-style: none; }
+.info-link-list li { display: grid; gap: 3px; border: 1px solid #d8e2df; border-radius: 6px; padding: 8px; }
+.info-link-list small { color: #64706b; overflow-wrap: anywhere; }
+</style>
+
diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoPageShell.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoPageShell.vue
new file mode 100644
index 00000000..58667bec
--- /dev/null
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoPageShell.vue
@@ -0,0 +1,555 @@
+<!-- SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite. -->
+<!-- Responsibility: MDTODO page shell — route restore, loading/error boundary, bounded three-pane workspace assembly. -->
+
+<script setup lang="ts">
+import { computed, onMounted, ref, watch } from "vue";
+import { useRoute, useRouter } from "vue-router";
+import { projectManagementAPI, type MdtodoTaskMutationInput, type MdtodoTaskRecord, type ProjectNavigationResponse, type ProjectSource } from "@/api";
+import type { ApiError, ErrorDiagnostic } from "@/types";
+import EmptyState from "@/components/common/EmptyState.vue";
+import LoadingState from "@/components/common/LoadingState.vue";
+import SplitWorkspaceLayout from "@/components/layout/SplitWorkspaceLayout.vue";
+import MdtodoToolbar from "@/components/mdtodo/MdtodoToolbar.vue";
+import MdtodoTaskTree from "@/components/mdtodo/MdtodoTaskTree.vue";
+import MdtodoTaskPanel from "@/components/mdtodo/MdtodoTaskPanel.vue";
+import MdtodoReportPanel from "@/components/mdtodo/MdtodoReportPanel.vue";
+import MdtodoSourceDialog from "@/components/mdtodo/MdtodoSourceDialog.vue";
+import MdtodoCreateTaskDialog from "@/components/mdtodo/MdtodoCreateTaskDialog.vue";
+import MdtodoInfoDialog from "@/components/mdtodo/MdtodoInfoDialog.vue";
+import { useMdtodoRouteSelection } from "@/composables/mdtodo/useMdtodoRouteSelection";
+import { useMdtodoSource } from "@/composables/mdtodo/useMdtodoSource";
+import { useMdtodoTaskData } from "@/composables/mdtodo/useMdtodoTaskData";
+import { useMdtodoTaskMutation } from "@/composables/mdtodo/useMdtodoTaskMutation";
+import { useMdtodoReportPreview } from "@/composables/mdtodo/useMdtodoReportPreview";
+import { useMdtodoWorkbenchLaunch } from "@/composables/mdtodo/useMdtodoWorkbenchLaunch";
+import { fileDisplayName } from "@/composables/mdtodo/useMdtodoDisplay";
+
+const router = useRouter();
+const route = useRoute();
+
+// Page-level loading / error boundary
+const loading = ref(false);
+const error = ref<string | null>(null);
+const apiError = ref<ApiError | null>(null);
+const diagnostic = ref<ErrorDiagnostic | null>(null);
+
+// Composables
+const selection = useMdtodoRouteSelection({ router, route });
+const source = useMdtodoSource();
+const taskData = useMdtodoTaskData();
+const mutation = useMdtodoTaskMutation();
+const report = useMdtodoReportPreview();
+const launch = useMdtodoWorkbenchLaunch(router);
+
+// Selection state (URL is authority; these mirror the URL)
+const selectedSourceId = ref<string | null>(null);
+const selectedFileRef = ref<string | null>(null);
+const selectedTaskRef = ref<string | null>(null);
+
+// Tree / pane view state (local, not URL-authoritative)
+const taskSearch = ref("");
+const taskStatusFilter = ref("all");
+const collapsedTaskRefs = ref<Set<string>>(new Set());
+const taskPaneCollapsed = ref(false);
+const taskPaneWidth = ref(30);
+const reportPaneCollapsed = ref(false);
+const reportPaneWidth = ref(50);
+
+// Dialog visibility
+const showInfo = ref(false);
+const showSourceConfig = ref(false);
+const showTaskCreateDialog = ref(false);
+
+// Inline edit state
+const editingTitle = ref(false);
+const editingBody = ref(false);
+const editTitle = ref("");
+const editStatus = ref("open");
+const editBody = ref("");
+const newTaskTitle = ref("");
+const newTaskBody = ref("");
+const deleteConfirm = ref(false);
+
+// Derived selections
+const selectedSource = computed(() => source.sources.value.find((s) => s.sourceId === selectedSourceId.value) ?? null);
+const selectedFile = computed(() => taskData.files.value.find((f) => f.fileRef === selectedFileRef.value) ?? null);
+const selectedTask = computed(() => taskData.tasks.value.find((t) => t.taskRef === selectedTaskRef.value) ?? null);
+const fileScopedTasks = computed(() => selectedFileRef.value ? taskData.tasks.value.filter((t) => t.fileRef === selectedFileRef.value) : taskData.tasks.value);
+
+const filteredTasks = computed(() => {
+  const query = taskSearch.value.trim().toLowerCase();
+  return fileScopedTasks.value.filter((task) => {
+    const statusOk = taskStatusFilter.value === "all" || (task.status || "unknown") === taskStatusFilter.value;
+    if (!statusOk) return false;
+    if (!query) return true;
+    return [task.taskId, task.title, task.taskRef].some((value) => String(value ?? "").toLowerCase().includes(query));
+  });
+});
+
+const taskStatusCounts = computed(() => fileScopedTasks.value.reduce((acc, task) => {
+  const key = task.status || "unknown";
+  acc[key] = (acc[key] ?? 0) + 1;
+  return acc;
+}, {} as Record<string, number>));
+
+const selectedTaskBody = computed(() => taskData.taskDetail.value?.body ?? selectedTask.value?.bodyPreview ?? "");
+const selectedTaskLinks = computed(() => taskData.taskDetail.value?.links ?? []);
+const selectedTaskBodyHtml = computed(() => report.markdownToHtml(selectedTaskBody.value));
+const reportPreviewHtml = computed(() => report.markdownToHtml(report.reportPreview.value?.content ?? ""));
+const selectedFileName = computed(() => selectedFile.value ? fileDisplayName(selectedFile.value) : selectedTask.value?.fileRef || "-");
+const reportPaneOpen = computed(() => Boolean(report.reportPreview.value));
+const workbenchLaunchEnabled = computed(() => launch.isLaunchEnabled(source.navigation.value));
+const launchButtonDisabled = computed(() => !selectedTask.value || !workbenchLaunchEnabled.value || launch.launchLoading.value);
+const selectedSourceCanReindex = computed(() => Boolean(selectedSourceId.value && !taskData.taskLoading.value && !source.sourceReindexLoading.value));
+const selectedTaskLabel = computed(() => selectedTask.value ? `${selectedTask.value.taskId || ''} ${selectedTask.value.title || ''}`.trim() : "");
+
+onMounted(() => void loadPage());
+
+watch(selectedSourceId, async (sourceId) => {
+  if (!sourceId || loading.value || selection.applyingRouteSelection.value) return;
+  await loadFilesAndTasks(sourceId, { updateRoute: true });
+});
+
+watch(selectedTaskRef, async (taskRef) => {
+  await Promise.all([taskData.loadLinks(taskRef), taskData.loadTaskDetail(taskRef)]);
+});
+
+watch(() => route.fullPath, async () => {
+  if (loading.value || !source.sources.value.length) return;
+  await applyRouteSelection();
+});
+
+watch(selectedTask, (task) => resetTaskEditor(task), { immediate: true });
+
+watch(taskData.taskDetail, (detail) => {
+  if (detail?.taskRef === selectedTaskRef.value && !editingBody.value) editBody.value = detail.body || "";
+});
+
+async function loadPage(): Promise<void> {
+  loading.value = true;
+  error.value = null;
+  apiError.value = null;
+  diagnostic.value = null;
+  try {
+    const { sources } = await source.loadNavigationAndSources();
+    const sourceFromRoute = selection.readSelection().sourceId;
+    selectedSourceId.value = sourceFromRoute && sources.some((s) => s.sourceId === sourceFromRoute)
+      ? sourceFromRoute
+      : selectedSourceId.value && sources.some((s) => s.sourceId === selectedSourceId.value)
+        ? selectedSourceId.value
+        : sources[0]?.sourceId ?? null;
+    if (selectedSourceId.value) await loadFilesAndTasks(selectedSourceId.value, selection.routeSelectionOptions(true));
+    else await taskData.loadLinks(null);
+  } catch (err) {
+    setError(err);
+  } finally {
+    loading.value = false;
+  }
+}
+
+async function loadFilesAndTasks(sourceId: string, options: { fileRef?: string | null; taskId?: string | null; reportLinkId?: string | null; updateRoute?: boolean } = {}): Promise<void> {
+  taskData.taskLoading.value = true;
+  try {
+    await taskData.loadFiles(sourceId);
+    selectedFileRef.value = options.fileRef && taskData.files.value.some((f) => f.fileRef === options.fileRef)
+      ? options.fileRef
+      : selectedFileRef.value && taskData.files.value.some((f) => f.fileRef === selectedFileRef.value)
+        ? selectedFileRef.value
+        : taskData.files.value[0]?.fileRef ?? null;
+    await taskData.loadTaskWindow(sourceId, selectedFileRef.value, options.taskId ?? selectedTaskRef.value);
+    const preferred = taskData.resolvePreferredTask(options.taskId ?? selectedTaskRef.value);
+    selectedTaskRef.value = preferred?.taskRef ?? taskData.tasks.value[0]?.taskRef ?? null;
+    collapsedTaskRefs.value = new Set();
+    if (!selectedTaskRef.value) await Promise.all([taskData.loadLinks(null), taskData.loadTaskDetail(null)]);
+    if (options.reportLinkId && selectedTaskRef.value) {
+      await Promise.all([taskData.loadLinks(selectedTaskRef.value), taskData.loadTaskDetail(selectedTaskRef.value)]);
+      await report.openReportPreviewById(selectedTaskRef.value, selectedTaskLinks.value, options.reportLinkId);
+    } else if (options.updateRoute !== false) {
+      void syncRoute({ replace: true });
+    }
+  } catch (err) {
+    setError(err);
+  } finally {
+    taskData.taskLoading.value = false;
+  }
+}
+
+async function selectFile(fileRef: string): Promise<void> {
+  selectedFileRef.value = fileRef || null;
+  report.closeReportPreview();
+  if (!selectedSourceId.value) return;
+  taskData.taskLoading.value = true;
+  try {
+    await taskData.loadTaskWindow(selectedSourceId.value, selectedFileRef.value, null);
+    selectedTaskRef.value = taskData.tasks.value[0]?.taskRef ?? null;
+    collapsedTaskRefs.value = new Set();
+    if (!selectedTaskRef.value) await Promise.all([taskData.loadLinks(null), taskData.loadTaskDetail(null)]);
+    void syncRoute({ replace: false });
+  } catch (err) {
+    setError(err);
+  } finally {
+    taskData.taskLoading.value = false;
+  }
+}
+
+function selectTask(taskRef: string): void {
+  selectedTaskRef.value = taskRef;
+  report.closeReportPreview();
+  void syncRoute({ replace: false });
+}
+
+async function syncRoute(options: { replace?: boolean; reportLinkId?: string | null } = {}): Promise<void> {
+  await selection.syncSelectionRoute({
+    sourceId: selectedSourceId.value,
+    fileRef: selectedFileRef.value,
+    taskId: selectedTask.value?.taskId ?? null,
+    reportLinkId: options.reportLinkId ?? report.activeReportLink.value?.linkId ?? null,
+    replace: options.replace
+  });
+}
+
+async function applyRouteSelection(): Promise<void> {
+  const sel = selection.readSelection();
+  const nextSourceId = sel.sourceId && source.sources.value.some((s) => s.sourceId === sel.sourceId) ? sel.sourceId : selectedSourceId.value;
+  if (!nextSourceId) return;
+  selection.applyingRouteSelection.value = true;
+  try {
+    selectedSourceId.value = nextSourceId;
+    await loadFilesAndTasks(nextSourceId, selection.routeSelectionOptions(false));
+  } finally {
+    selection.applyingRouteSelection.value = false;
+  }
+}
+
+function resetTaskEditor(task: MdtodoTaskRecord | null): void {
+  editingTitle.value = false;
+  editingBody.value = false;
+  editTitle.value = task?.title || "";
+  editStatus.value = task?.status || "open";
+  editBody.value = taskData.taskDetail.value?.taskRef === task?.taskRef ? taskData.taskDetail.value?.body || "" : "";
+  deleteConfirm.value = false;
+}
+
+function taskFingerprint(): string | undefined {
+  return selectedTask.value?.sourceFingerprint || selectedFile.value?.fingerprint || undefined;
+}
+
+async function reloadAfterMutation(): Promise<void> {
+  const sourceId = selectedSourceId.value;
+  if (!sourceId) return;
+  await taskData.loadFiles(sourceId);
+  await taskData.loadTaskWindow(sourceId, selectedFileRef.value, selectedTaskRef.value);
+}
+
+async function saveTaskBasics(): Promise<void> {
+  const task = selectedTask.value;
+  if (!task) return;
+  const input: MdtodoTaskMutationInput = { expectedFingerprint: taskFingerprint() };
+  if (editTitle.value.trim() && editTitle.value.trim() !== (task.title || "")) input.title = editTitle.value.trim();
+  if (editStatus.value && editStatus.value !== (task.status || "open")) input.status = editStatus.value;
+  if (!input.title && !input.status) {
+    mutation.taskMutationMessage.value = "任务标题和状态没有变化";
+    mutation.taskMutationError.value = null;
+    return;
+  }
+  const nextRef = await mutation.updateTask(task.taskRef, input, "任务已保存", reloadAfterMutation);
+  if (nextRef && !mutation.taskMutationError.value) {
+    if (taskData.tasks.value.some((t) => t.taskRef === nextRef)) selectedTaskRef.value = nextRef;
+    editingTitle.value = false;
+  }
+}
+
+async function saveTaskBody(): Promise<void> {
+  const task = selectedTask.value;
+  if (!task) return;
+  const nextRef = await mutation.updateTask(task.taskRef, { expectedFingerprint: taskFingerprint(), body: editBody.value }, "正文已保存", reloadAfterMutation);
+  if (nextRef && !mutation.taskMutationError.value) {
+    if (taskData.tasks.value.some((t) => t.taskRef === nextRef)) selectedTaskRef.value = nextRef;
+    editingBody.value = false;
+  }
+}
+
+async function createTask(kind: "root" | "subtask" | "continue"): Promise<void> {
+  const title = newTaskTitle.value.trim();
+  if (!title) {
+    mutation.taskMutationError.value = "新任务标题不能为空";
+    mutation.taskMutationMessage.value = null;
+    return;
+  }
+  const task = selectedTask.value;
+  const input: MdtodoTaskMutationInput = {
+    sourceId: selectedSourceId.value || undefined,
+    fileRef: selectedFileRef.value || undefined,
+    expectedFingerprint: taskFingerprint(),
+    title,
+    body: newTaskBody.value
+  };
+  if (kind === "subtask" && task) input.parentTaskRef = task.taskRef;
+  if (kind === "continue" && task) input.afterTaskRef = task.taskRef;
+  const nextRef = await mutation.createTask(input, "任务已创建", reloadAfterMutation);
+  if (nextRef && !mutation.taskMutationError.value) {
+    newTaskTitle.value = "";
+    newTaskBody.value = "";
+    showTaskCreateDialog.value = false;
+    if (taskData.tasks.value.some((t) => t.taskRef === nextRef)) selectedTaskRef.value = nextRef;
+  }
+}
+
+async function deleteSelectedTask(): Promise<void> {
+  const task = selectedTask.value;
+  if (!task) return;
+  if (!deleteConfirm.value) {
+    deleteConfirm.value = true;
+    mutation.taskMutationMessage.value = "再次点击确认删除当前任务及子任务";
+    mutation.taskMutationError.value = null;
+    return;
+  }
+  await mutation.deleteTask(task.taskRef, { expectedFingerprint: taskFingerprint() }, reloadAfterMutation);
+  deleteConfirm.value = false;
+  if (!mutation.taskMutationError.value) selectedTaskRef.value = taskData.tasks.value[0]?.taskRef ?? null;
+}
+
+function openReport(link: typeof selectedTaskLinks.value[number]): void {
+  const taskRef = selectedTaskRef.value;
+  if (!taskRef) return;
+  void report.openReportPreview(taskRef, link).then((r) => {
+    if (r) { reportPaneCollapsed.value = false; void syncRoute({ replace: false }); }
+  });
+}
+
+function closeReport(): void {
+  report.closeReportPreview();
+  void syncRoute({ replace: false });
+}
+
+async function launchWorkbench(): Promise<void> {
+  const task = selectedTask.value;
+  if (!task || launchButtonDisabled.value) return;
+  const result = await launch.launchTask(task, selectedTaskBody.value, selectedTaskLinks.value, selectedFileName.value, source.navigation.value);
+  if (result) {
+    await taskData.loadLinks(task.taskRef);
+    await launch.navigateToWorkbench(result);
+  }
+}
+
+function openSourceConfig(): void {
+  source.openSourceForm(selectedSource.value);
+  showSourceConfig.value = true;
+}
+
+async function saveSourceConfig(): Promise<void> {
+  const savedId = await source.saveSourceConfig();
+  if (savedId) {
+    showSourceConfig.value = false;
+    if (savedId !== selectedSourceId.value) selectedSourceId.value = savedId;
+  }
+}
+
+async function reindexSource(): Promise<void> {
+  const sourceId = selectedSourceId.value;
+  if (!sourceId) return;
+  const result = await source.reindexSource(sourceId);
+  if (result) await loadFilesAndTasks(sourceId);
+}
+
+function setError(err: unknown): void {
+  if (err && typeof err === "object" && "error" in err) {
+    const result = err as { error?: string | null; apiError?: ApiError | null; diagnostic?: ErrorDiagnostic | null; status?: number };
+    error.value = result.error || `HTTP ${result.status ?? "unknown"}`;
+    apiError.value = result.apiError ?? null;
+    diagnostic.value = result.diagnostic ?? null;
+  } else {
+    error.value = err instanceof Error ? err.message : String(err || "MDTODO 加载失败");
+    apiError.value = null;
+    diagnostic.value = null;
+  }
+}
+</script>
+
+<template>
+  <section class="route-stack mdtodo-page" data-testid="project-management-mdtodo">
+    <header class="mdtodo-compact-header">
+      <div>
+        <span>Project Management</span>
+        <h1>MDTODO</h1>
+      </div>
+      <p>{{ selectedFileName }}<small v-if="selectedTask"> / {{ selectedTask.taskId }}</small></p>
+    </header>
+
+    <LoadingState v-if="loading && !source.sources.value.length" label="加载 MDTODO source" />
+    <section v-else-if="error" class="data-panel mdtodo-error" data-testid="project-management-error">
+      <EmptyState title="MDTODO 加载失败" :description="error" :api-error="apiError" :diagnostic="diagnostic" action-label="重试" @action="loadPage" />
+    </section>
+
+    <template v-else>
+      <MdtodoToolbar
+        :sources="source.sources.value"
+        :selected-source-id="selectedSourceId"
+        :files="taskData.files.value"
+        :selected-file-ref="selectedFileRef"
+        :file-loading="taskData.taskLoading.value"
+        :reindex-loading="source.sourceReindexLoading.value"
+        :selected-file-name="selectedFileName"
+        :selected-task-label="selectedTaskLabel"
+        @update:selected-source-id="selectedSourceId = $event"
+        @update:selected-file-ref="selectFile($event)"
+        @open-source-config="openSourceConfig"
+        @reindex="reindexSource"
+        @open-info="showInfo = true"
+        @open-create-task="showTaskCreateDialog = true"
+      />
+
+      <p v-if="source.sourceMessage.value" class="source-message" data-testid="mdtodo-source-message">{{ source.sourceMessage.value }}</p>
+      <p v-if="source.sourceError.value" class="source-error" data-testid="mdtodo-source-error">{{ source.sourceError.value }}</p>
+
+      <SplitWorkspaceLayout
+        v-model:left-width="taskPaneWidth"
+        v-model:right-width="reportPaneWidth"
+        class="mdtodo-workspace"
+        :left-collapsed="taskPaneCollapsed"
+        :right-open="reportPaneOpen"
+        :right-collapsed="reportPaneCollapsed"
+        left-resizer-test-id="mdtodo-task-pane-resizer"
+        right-resizer-test-id="mdtodo-report-pane-resizer"
+        aria-label="MDTODO 工作区"
+      >
+        <template #left>
+          <MdtodoTaskTree
+            :tasks="filteredTasks"
+            :file-scoped-task-count="fileScopedTasks.length"
+            :task-page="taskData.taskPage.value"
+            :selected-task-ref="selectedTaskRef"
+            :collapsed-task-refs="collapsedTaskRefs"
+            :collapsed="taskPaneCollapsed"
+            :loading="taskData.taskLoading.value"
+            :search="taskSearch"
+            :status-filter="taskStatusFilter"
+            @update:search="taskSearch = $event"
+            @update:status-filter="taskStatusFilter = $event"
+            @update:collapsed="taskPaneCollapsed = $event"
+            @update:collapsed-task-refs="collapsedTaskRefs = $event"
+            @select-task="selectTask"
+            @open-create-task="showTaskCreateDialog = true"
+          />
+        </template>
+
+        <MdtodoTaskPanel
+          :task="selectedTask"
+          :detail="taskData.taskDetail.value"
+          :detail-loading="taskData.taskDetailLoading.value"
+          :detail-error="taskData.taskDetailError.value"
+          :body-text="selectedTaskBody"
+          :body-html="selectedTaskBodyHtml"
+          :links="selectedTaskLinks"
+          :editing-title="editingTitle"
+          :editing-body="editingBody"
+          :edit-title="editTitle"
+          :edit-status="editStatus"
+          :edit-body="editBody"
+          :delete-confirm="deleteConfirm"
+          :mutation-loading="mutation.taskMutationLoading.value"
+          :mutation-message="mutation.taskMutationMessage.value"
+          :mutation-error="mutation.taskMutationError.value"
+          :launch-loading="launch.launchLoading.value"
+          :launch-error="launch.launchError.value"
+          :launch-enabled="workbenchLaunchEnabled"
+          :navigation="source.navigation.value"
+          @update:edit-title="editTitle = $event"
+          @update:edit-status="editStatus = $event"
+          @update:edit-body="editBody = $event"
+          @begin-title-edit="editingTitle = true"
+          @cancel-title-edit="editTitle = selectedTask?.title || ''; editingTitle = false"
+          @save-task-basics="saveTaskBasics"
+          @begin-body-edit="editingBody = true"
+          @cancel-body-edit="editBody = selectedTaskBody; editingBody = false"
+          @save-task-body="saveTaskBody"
+          @delete-task="deleteSelectedTask"
+          @cancel-delete="deleteConfirm = false"
+          @open-report="openReport"
+          @launch-workbench="launchWorkbench"
+        />
+
+        <template #right>
+          <MdtodoReportPanel
+            :report="report.reportPreview.value"
+            :active-link="report.activeReportLink.value"
+            :report-html="reportPreviewHtml"
+            :fullscreen-html="reportPreviewHtml"
+            :loading="report.reportLoading.value"
+            :error="report.reportError.value"
+            :collapsed="reportPaneCollapsed"
+            :show-fullscreen="report.showReportFullscreen.value"
+            :links="selectedTaskLinks"
+            @update:collapsed="reportPaneCollapsed = $event"
+            @open-preview="openReport"
+            @close="closeReport"
+            @open-fullscreen="report.openFullscreen()"
+            @close-fullscreen="report.closeFullscreen()"
+          />
+        </template>
+      </SplitWorkspaceLayout>
+    </template>
+
+    <MdtodoInfoDialog
+      :show="showInfo"
+      :sources="source.sources.value"
+      :selected-source="selectedSource"
+      :selected-source-id="selectedSourceId"
+      :selected-file="selectedFile"
+      :selected-file-ref="selectedFileRef"
+      :selected-file-name="selectedFileName"
+      :selected-task="selectedTask"
+      :links="taskData.links.value"
+      :task-page="taskData.taskPage.value"
+      :file-scoped-task-count="fileScopedTasks.length"
+      :task-status-counts="taskStatusCounts"
+      :navigation="source.navigation.value"
+      @close="showInfo = false"
+    />
+
+    <MdtodoCreateTaskDialog
+      :show="showTaskCreateDialog"
+      :new-title="newTaskTitle"
+      :new-body="newTaskBody"
+      :loading="mutation.taskMutationLoading.value"
+      :error="mutation.taskMutationError.value"
+      :has-selected-task="Boolean(selectedTask)"
+      @close="showTaskCreateDialog = false"
+      @update:new-title="newTaskTitle = $event"
+      @update:new-body="newTaskBody = $event"
+      @create="createTask"
+    />
+
+    <MdtodoSourceDialog
+      :show="showSourceConfig"
+      :form="source.sourceForm"
+      :saving="source.sourceSaving.value"
+      :probe-loading="source.sourceProbeLoading.value"
+      :reindex-loading="source.sourceReindexLoading.value"
+      :message="source.sourceMessage.value"
+      :error="source.sourceError.value"
+      @close="showSourceConfig = false"
+      @save="saveSourceConfig"
+      @probe="source.probeSource(selectedSourceId)"
+      @reindex="reindexSource"
+    />
+  </section>
+</template>
+
+<style scoped>
+.mdtodo-page { display: grid; height: calc(100dvh - 68px); max-height: calc(100dvh - 68px); min-width: 0; min-height: 0; grid-template-rows: auto auto auto minmax(0, 1fr); gap: 10px; overflow: hidden; }
+.mdtodo-compact-header { display: flex; min-width: 0; min-height: 40px; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid #d8e2df; padding: 0 2px 6px; }
+.mdtodo-compact-header span { color: #64706b; font-size: 11px; font-weight: 800; text-transform: uppercase; }
+.mdtodo-compact-header h1 { margin: 1px 0 0; color: #14211d; font-size: 18px; line-height: 1.1; }
+.mdtodo-compact-header p { min-width: 0; margin: 0; overflow: hidden; color: #52615c; font-size: 12px; font-weight: 750; text-overflow: ellipsis; white-space: nowrap; }
+.mdtodo-compact-header small { color: #0f766e; font: inherit; }
+.source-message, .source-error { margin: 0; border-radius: 6px; padding: 6px 10px; font-size: 13px; }
+.source-message { border: 1px solid #bbf7d0; background: #f0fdf4; color: #166534; }
+.source-error { border: 1px solid #fecaca; background: #fef2f2; color: #991b1b; }
+.mdtodo-workspace { min-height: 0; height: 100%; }
+.mdtodo-error { display: grid; min-width: 0; min-height: 0; height: 100%; align-content: start; gap: 12px; padding: 12px; overflow: auto; }
+@media (max-width: 720px) {
+  .mdtodo-page { height: calc(100dvh - 68px); max-height: calc(100dvh - 68px); overflow: hidden; }
+}
+</style>
+
diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoReportPanel.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoReportPanel.vue
new file mode 100644
index 00000000..e64d03a2
--- /dev/null
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoReportPanel.vue
@@ -0,0 +1,76 @@
+<!-- SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite. -->
+<!-- Responsibility: right-pane report preview — open/close/fold/fullscreen, light code blocks, internal scroll. -->
+
+<script setup lang="ts">
+import type { MdtodoReportPreviewRecord, MdtodoTaskLinkRecord } from "@/api";
+
+defineProps<{
+  report: MdtodoReportPreviewRecord | null;
+  activeLink: MdtodoTaskLinkRecord | null;
+  reportHtml: string;
+  fullscreenHtml: string;
+  loading: boolean;
+  error: string | null;
+  collapsed: boolean;
+  showFullscreen: boolean;
+  links: MdtodoTaskLinkRecord[];
+}>();
+
+const emit = defineEmits<{
+  "update:collapsed": [value: boolean];
+  openPreview: [link: MdtodoTaskLinkRecord];
+  close: [];
+  openFullscreen: [];
+  closeFullscreen: [];
+}>();
+</script>
+
+<template>
+  <aside class="data-panel report-sidebar" data-testid="mdtodo-report-sidebar" :data-collapsed="collapsed">
+    <header class="report-sidebar-header">
+      <button class="icon-button" type="button" data-testid="mdtodo-report-sidebar-toggle" :aria-label="collapsed ? '展开报告侧栏' : '收起报告侧栏'" @click="emit('update:collapsed', !collapsed)">{{ collapsed ? '‹' : '›' }}</button>
+      <strong v-if="!collapsed" class="report-title">{{ activeLink?.label || report?.relativePath || 'Report' }}</strong>
+      <div v-if="!collapsed" class="report-sidebar-actions">
+        <button class="btn btn-secondary" type="button" data-testid="mdtodo-report-fullscreen" :disabled="!report" @click="emit('openFullscreen')">全屏</button>
+        <button class="icon-button" type="button" aria-label="关闭报告预览" data-testid="mdtodo-report-close" @click="emit('close')">×</button>
+      </div>
+    </header>
+    <article v-if="!collapsed" class="report-preview" data-testid="mdtodo-report-preview">
+      <div v-if="loading" class="report-loading">加载报告中…</div>
+      <div v-else class="markdown-body" v-html="reportHtml" />
+      <p v-if="error" class="source-error" data-testid="mdtodo-report-error">{{ error }}</p>
+    </article>
+  </aside>
+
+  <div v-if="showFullscreen && report" class="modal-backdrop" data-testid="mdtodo-report-fullscreen-dialog" role="dialog" aria-modal="true" aria-label="报告预览" @click.self="emit('closeFullscreen')">
+    <section class="mdtodo-dialog report-fullscreen-dialog">
+      <header><h2>{{ activeLink?.label || report.relativePath || 'Report' }}</h2><button class="icon-button" type="button" aria-label="关闭报告" @click="emit('closeFullscreen')">×</button></header>
+      <article class="markdown-body report-fullscreen-body" v-html="fullscreenHtml" />
+    </section>
+  </div>
+</template>
+
+<style scoped>
+.data-panel { display: grid; min-width: 0; min-height: 0; height: 100%; grid-template-rows: auto minmax(0, 1fr); border: 1px solid #d8e2df; border-radius: 8px; background: #fff; padding: 10px; overflow: hidden; }
+.report-sidebar[data-collapsed="true"] { justify-items: center; padding: 8px 4px; grid-template-rows: auto; }
+.report-sidebar-header { display: flex; min-width: 0; align-items: center; justify-content: space-between; gap: 8px; color: #14211d; font-size: 13px; }
+.report-title { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.report-sidebar-actions { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 6px; }
+.report-preview { display: grid; min-height: 0; gap: 8px; border-top: 1px solid #e2ece8; padding-top: 8px; overflow: hidden; }
+.report-preview > .markdown-body { min-height: 0; overflow: auto; }
+.report-loading { color: #64706b; font-size: 13px; padding: 12px; }
+.markdown-body { min-width: 0; color: #14211d; font-size: 13px; line-height: 1.55; overflow-wrap: anywhere; }
+.markdown-body :deep(p), .markdown-body :deep(ul), .markdown-body :deep(ol), .markdown-body :deep(pre), .markdown-body :deep(blockquote) { margin: 0 0 8px; }
+.markdown-body :deep(pre) { max-width: 100%; overflow: auto; border: 1px solid #d8e2df; border-radius: 6px; background: #f8faf9; color: #14211d; padding: 10px; white-space: pre; }
+.markdown-body :deep(code) { border-radius: 4px; background: #eef6f2; padding: 1px 4px; color: #0f766e; }
+.markdown-body :deep(pre code) { background: transparent; color: inherit; padding: 0; white-space: inherit; }
+.markdown-body :deep(a) { color: #0f766e; font-weight: 750; }
+.source-error { margin: 0; border: 1px solid #fecaca; background: #fef2f2; color: #991b1b; border-radius: 6px; padding: 8px 10px; font-size: 13px; }
+.icon-button { display: inline-grid; width: 36px; height: 36px; place-items: center; border: 1px solid #cbd8d2; border-radius: 6px; background: #fff; color: #14211d; font-weight: 850; }
+.modal-backdrop { position: fixed; z-index: 60; inset: 0; display: grid; place-items: start center; overflow: auto; background: rgba(15, 23, 42, 0.38); padding: 8dvh 16px 32px; }
+.mdtodo-dialog { display: grid; width: min(1180px, calc(100vw - 48px)); height: min(820px, calc(100dvh - 64px)); max-height: calc(100dvh - 64px); grid-template-rows: auto minmax(0, 1fr); align-content: stretch; gap: 14px; border: 1px solid #cbd8d2; border-radius: 8px; background: #fff; color: #14211d; padding: 16px; box-shadow: 0 24px 60px rgba(15, 23, 42, 0.22); overflow: hidden; }
+.mdtodo-dialog header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
+.mdtodo-dialog h2 { margin: 0; font-size: 18px; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.report-fullscreen-body { min-height: 0; height: 100%; overflow: auto; border: 1px solid #e2e8f0; border-radius: 6px; padding: 14px; }
+</style>
+
diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoSourceDialog.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoSourceDialog.vue
new file mode 100644
index 00000000..4de9fdb6
--- /dev/null
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoSourceDialog.vue
@@ -0,0 +1,64 @@
+<!-- SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite. -->
+<!-- Responsibility: HWPOD-bound MDTODO source configuration dialog (create/update/probe/reindex). -->
+
+<script setup lang="ts">
+import type { ProjectSourceInput } from "@/api";
+
+defineProps<{
+  show: boolean;
+  form: ProjectSourceInput;
+  saving: boolean;
+  probeLoading: boolean;
+  reindexLoading: boolean;
+  message: string | null;
+  error: string | null;
+}>();
+
+const emit = defineEmits<{
+  close: [];
+  save: [];
+  probe: [];
+  reindex: [];
+}>();
+</script>
+
+<template>
+  <div v-if="show" class="modal-backdrop" data-testid="mdtodo-source-config-dialog" role="dialog" aria-modal="true" aria-label="配置 MDTODO Source" @click.self="emit('close')">
+    <section class="mdtodo-dialog source-config-dialog">
+      <header><h2>Source 配置</h2><button class="icon-button" type="button" data-testid="mdtodo-source-config-close" aria-label="关闭配置" @click="emit('close')">×</button></header>
+      <form class="source-form" @submit.prevent="emit('save')">
+        <label><span>Source ID</span><input v-model="form.sourceId" data-testid="mdtodo-source-form-id" required /></label>
+        <label><span>Display Name</span><input v-model="form.displayName" data-testid="mdtodo-source-form-name" required /></label>
+        <label><span>HWPOD ID</span><input v-model="form.hwpodId" data-testid="mdtodo-source-form-hwpod" required /></label>
+        <label><span>Node ID</span><input v-model="form.nodeId" data-testid="mdtodo-source-form-node" required /></label>
+        <label><span>Workspace Root</span><input v-model="form.workspaceRootRef" data-testid="mdtodo-source-form-workspace" /></label>
+        <label><span>MDTODO Root</span><input v-model="form.mdtodoRootRef" data-testid="mdtodo-source-form-root" required /></label>
+        <label><span>Max Files</span><input v-model.number="form.maxFiles" data-testid="mdtodo-source-form-max-files" type="number" min="1" max="500" /></label>
+        <footer>
+          <button class="btn btn-primary" data-testid="mdtodo-source-save" type="submit" :disabled="saving">{{ saving ? '保存中' : '保存' }}</button>
+          <button class="btn btn-secondary" data-testid="mdtodo-source-probe" type="button" :disabled="probeLoading" @click="emit('probe')">{{ probeLoading ? 'Probe...' : 'Probe' }}</button>
+          <button class="btn btn-secondary" data-testid="mdtodo-source-reindex-dialog" type="button" :disabled="reindexLoading" @click="emit('reindex')">{{ reindexLoading ? 'Reindex...' : 'Reindex' }}</button>
+        </footer>
+        <p v-if="message" class="source-message">{{ message }}</p>
+        <p v-if="error" class="source-error">{{ error }}</p>
+      </form>
+    </section>
+  </div>
+</template>
+
+<style scoped>
+.modal-backdrop { position: fixed; z-index: 60; inset: 0; display: grid; place-items: start center; overflow: auto; background: rgba(15, 23, 42, 0.38); padding: 8dvh 16px 32px; }
+.mdtodo-dialog { display: grid; width: min(720px, calc(100vw - 32px)); gap: 14px; border: 1px solid #cbd8d2; border-radius: 8px; background: #fff; color: #14211d; padding: 16px; box-shadow: 0 24px 60px rgba(15, 23, 42, 0.22); }
+.mdtodo-dialog header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
+.mdtodo-dialog h2 { margin: 0; font-size: 18px; }
+.icon-button { display: inline-grid; width: 36px; height: 36px; place-items: center; border: 1px solid #cbd8d2; border-radius: 6px; background: #fff; color: #14211d; font-weight: 850; }
+.source-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
+.source-form label { display: grid; min-width: 0; gap: 5px; color: #52615c; font-size: 12px; font-weight: 800; }
+.source-form input { width: 100%; min-width: 0; height: 36px; border: 1px solid #cbd8d2; border-radius: 6px; background: #fff; color: #14211d; padding: 0 10px; font: inherit; }
+.source-form footer { display: flex; grid-column: 1 / -1; flex-wrap: wrap; gap: 8px; }
+.source-form .source-message, .source-form .source-error { grid-column: 1 / -1; margin: 0; border-radius: 6px; padding: 8px 10px; font-size: 13px; }
+.source-message { border: 1px solid #bbf7d0; background: #f0fdf4; color: #166534; }
+.source-error { border: 1px solid #fecaca; background: #fef2f2; color: #991b1b; }
+@media (max-width: 640px) { .source-form { grid-template-columns: 1fr; } }
+</style>
+
diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskPanel.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskPanel.vue
new file mode 100644
index 00000000..fd1f9f80
--- /dev/null
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskPanel.vue
@@ -0,0 +1,167 @@
+<!-- SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite. -->
+<!-- Responsibility: main workspace — task title, status, body (the primary content), inline edit, report links, Workbench launch. -->
+
+<script setup lang="ts">
+import type { MdtodoTaskDetailRecord, MdtodoTaskLinkRecord, MdtodoTaskRecord, ProjectNavigationResponse } from "@/api";
+import LoadingState from "@/components/common/LoadingState.vue";
+import EmptyState from "@/components/common/EmptyState.vue";
+
+defineProps<{
+  task: MdtodoTaskRecord | null;
+  detail: MdtodoTaskDetailRecord | null;
+  detailLoading: boolean;
+  detailError: string | null;
+  bodyText: string;
+  bodyHtml: string;
+  links: MdtodoTaskLinkRecord[];
+  editingTitle: boolean;
+  editingBody: boolean;
+  editTitle: string;
+  editStatus: string;
+  editBody: string;
+  deleteConfirm: boolean;
+  mutationLoading: boolean;
+  mutationMessage: string | null;
+  mutationError: string | null;
+  launchLoading: boolean;
+  launchError: string | null;
+  launchEnabled: boolean;
+  navigation: ProjectNavigationResponse | null;
+}>();
+
+const emit = defineEmits<{
+  "update:editTitle": [value: string];
+  "update:editStatus": [value: string];
+  "update:editBody": [value: string];
+  beginTitleEdit: [];
+  cancelTitleEdit: [];
+  saveTaskBasics: [];
+  beginBodyEdit: [];
+  cancelBodyEdit: [];
+  saveTaskBody: [];
+  deleteTask: [];
+  cancelDelete: [];
+  openReport: [link: MdtodoTaskLinkRecord];
+  launchWorkbench: [];
+}>();
+</script>
+
+<template>
+  <section class="data-panel mdtodo-detail-panel" data-testid="mdtodo-task-detail">
+    <header class="mdtodo-detail-header">
+      <div class="task-title-block">
+        <span class="task-id-large">{{ task?.taskId || 'R?' }}</span>
+        <div v-if="task && editingTitle" class="inline-editor">
+          <input :value="editTitle" data-testid="mdtodo-edit-title" :disabled="mutationLoading" @input="emit('update:editTitle', ($event.target as HTMLInputElement).value)" @keyup.enter="emit('saveTaskBasics')" @keyup.esc="emit('cancelTitleEdit')" />
+          <button class="btn btn-secondary" type="button" data-testid="mdtodo-edit-save" :disabled="mutationLoading" @click="emit('saveTaskBasics')">保存</button>
+          <button class="btn btn-secondary" type="button" :disabled="mutationLoading" @click="emit('cancelTitleEdit')">取消</button>
+        </div>
+        <button v-else-if="task" class="task-title-read" type="button" data-testid="mdtodo-title-read" @dblclick="emit('beginTitleEdit')">{{ task.title || task.taskId }}</button>
+        <strong v-else>未选择任务</strong>
+      </div>
+      <div v-if="task" class="detail-toolbar">
+        <select :value="editStatus" data-testid="mdtodo-edit-status" :disabled="mutationLoading" aria-label="任务状态" @change="emit('update:editStatus', ($event.target as HTMLSelectElement).value)">
+          <option value="open">待办</option>
+          <option value="in_progress">进行中</option>
+          <option value="done">完成</option>
+          <option value="blocked">阻塞</option>
+        </select>
+        <button class="btn btn-secondary" type="button" data-testid="mdtodo-status-save" :disabled="mutationLoading" @click="emit('saveTaskBasics')">保存状态</button>
+        <button class="btn btn-primary" type="button" data-testid="mdtodo-workbench-launch" :disabled="!task || !launchEnabled || launchLoading" :aria-disabled="!task || !launchEnabled || launchLoading" @click="emit('launchWorkbench')">{{ launchLoading ? '启动中' : '在 Workbench 执行' }}</button>
+      </div>
+    </header>
+
+    <EmptyState v-if="!task" title="未选择任务" description="从左侧任务树选择一个任务，正文将在此处显示。" />
+
+    <template v-else>
+      <section class="task-detail-content" data-testid="mdtodo-task-editor">
+        <LoadingState v-if="detailLoading" compact label="同步任务详情" />
+        <p v-if="detailError" class="source-error" data-testid="mdtodo-task-detail-error">{{ detailError }}</p>
+
+        <section class="task-body-section" data-testid="mdtodo-task-body">
+          <header><strong>正文</strong><small>双击编辑</small></header>
+          <div v-if="editingBody" class="inline-body-editor">
+            <textarea :value="editBody" data-testid="mdtodo-edit-body" :disabled="mutationLoading" rows="14" @input="emit('update:editBody', ($event.target as HTMLTextAreaElement).value)" />
+            <div class="editor-actions">
+              <button class="btn btn-secondary" type="button" data-testid="mdtodo-edit-body-save" :disabled="mutationLoading" @click="emit('saveTaskBody')">保存正文</button>
+              <button class="btn btn-secondary" type="button" :disabled="mutationLoading" @click="emit('cancelBodyEdit')">取消</button>
+            </div>
+          </div>
+          <article v-else class="markdown-body task-body-rendered" data-testid="mdtodo-body-rendered" @dblclick="emit('beginBodyEdit')">
+            <div v-if="bodyHtml" v-html="bodyHtml" />
+            <p v-else class="empty-inline">暂无正文</p>
+          </article>
+        </section>
+
+        <section class="report-link-section" data-testid="mdtodo-report-section">
+          <header><strong>报告</strong><span v-if="links.length">{{ links.length }}</span></header>
+          <div v-if="links.length" class="report-link-list">
+            <button v-for="link in links" :key="link.linkId" class="report-link-button" type="button" data-testid="mdtodo-report-link" :disabled="link.kind !== 'markdown-report'" @click="emit('openReport', link)">
+              <span>{{ link.label || link.href }}</span>
+              <small>{{ link.relativePath || link.kind }}</small>
+            </button>
+          </div>
+          <p v-else class="empty-inline">暂无报告链接</p>
+        </section>
+
+        <div class="editor-actions danger-actions">
+          <button class="btn btn-secondary" type="button" data-testid="mdtodo-delete-task" :disabled="mutationLoading" @click="emit('deleteTask')">{{ deleteConfirm ? '确认删除' : '删除任务' }}</button>
+          <button v-if="deleteConfirm" class="btn btn-secondary" type="button" data-testid="mdtodo-delete-cancel" :disabled="mutationLoading" @click="emit('cancelDelete')">取消</button>
+        </div>
+
+        <p v-if="mutationMessage" class="source-message" data-testid="mdtodo-task-mutation-message">{{ mutationMessage }}</p>
+        <p v-if="mutationError" class="source-error" data-testid="mdtodo-task-mutation-error">{{ mutationError }}</p>
+        <p class="launch-blocker" data-testid="mdtodo-workbench-launch-blocker">{{ launchEnabled ? 'Workbench Launch API ready' : 'Workbench Launch capability unavailable' }}</p>
+        <p v-if="launchError" class="launch-blocker" data-testid="mdtodo-workbench-launch-error">{{ launchError }}</p>
+      </section>
+    </template>
+  </section>
+</template>
+
+<style scoped>
+.data-panel { display: grid; min-width: 0; min-height: 0; height: 100%; align-content: stretch; grid-template-rows: auto minmax(0, 1fr); gap: 12px; padding: 12px; overflow: hidden; }
+.mdtodo-detail-header { display: flex; min-width: 0; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid #e2ece8; padding-bottom: 8px; }
+.task-title-block { display: grid; min-width: 0; grid-template-columns: auto minmax(0, 1fr); gap: 8px; align-items: center; }
+.task-id-large { display: inline-flex; min-width: 46px; justify-content: center; border: 1px solid #99f6e4; border-radius: 6px; background: #ecfdf5; color: #0f766e; padding: 5px 8px; font-size: 12px; font-weight: 850; }
+.task-title-read { min-width: 0; overflow: hidden; border: 0; border-radius: 6px; background: transparent; color: #14211d; padding: 5px 6px; font: inherit; font-size: 17px; font-weight: 850; text-align: left; text-overflow: ellipsis; white-space: nowrap; }
+.task-title-read:hover { background: #f4fbf8; }
+.inline-editor { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 8px; align-items: center; }
+.inline-editor input { width: 100%; min-width: 0; border: 1px solid #cbd8d4; border-radius: 6px; color: #14211d; font: inherit; padding: 8px 9px; }
+.detail-toolbar { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
+.detail-toolbar select { min-width: 112px; height: 34px; border: 1px solid #cbd8d2; border-radius: 6px; background: #fff; color: #14211d; padding: 0 8px; font: inherit; }
+.task-detail-content { display: grid; min-width: 0; min-height: 0; align-content: start; grid-template-rows: auto auto minmax(0, 1fr) auto auto auto auto auto; gap: 10px; overflow: auto; }
+.task-body-section { display: grid; min-width: 0; min-height: 0; gap: 8px; flex: 1 1 auto; }
+.task-body-section header { display: flex; min-width: 0; align-items: center; justify-content: space-between; gap: 10px; color: #14211d; font-size: 13px; }
+.task-body-section header small { color: #64706b; font-size: 12px; }
+.task-body-rendered { min-height: 120px; overflow: auto; border: 1px solid #d8e2df; border-radius: 6px; background: #fff; padding: 14px; flex: 1 1 auto; }
+.markdown-body { min-width: 0; color: #14211d; font-size: 13px; line-height: 1.6; overflow-wrap: anywhere; }
+.markdown-body :deep(p), .markdown-body :deep(ul), .markdown-body :deep(ol), .markdown-body :deep(pre), .markdown-body :deep(blockquote) { margin: 0 0 10px; }
+.markdown-body :deep(pre) { max-width: 100%; overflow: auto; border: 1px solid #d8e2df; border-radius: 6px; background: #f8faf9; color: #14211d; padding: 10px; white-space: pre; }
+.markdown-body :deep(code) { border-radius: 4px; background: #eef6f2; padding: 1px 4px; color: #0f766e; }
+.markdown-body :deep(pre code) { background: transparent; color: inherit; padding: 0; white-space: inherit; }
+.markdown-body :deep(a) { color: #0f766e; font-weight: 750; }
+.empty-inline { margin: 0; color: #64706b; }
+.inline-body-editor { display: grid; gap: 8px; }
+.inline-body-editor textarea { width: 100%; min-width: 0; min-height: 240px; border: 1px solid #cbd8d4; border-radius: 6px; background: #fff; color: #14211d; font: inherit; line-height: 1.5; padding: 10px; resize: vertical; }
+.report-link-section { display: grid; min-height: 0; gap: 8px; border: 1px solid #d8e2df; border-radius: 8px; background: #fff; padding: 10px; }
+.report-link-section header { display: flex; min-width: 0; align-items: center; justify-content: space-between; gap: 10px; color: #14211d; font-size: 13px; }
+.report-link-section header span { color: #64706b; font-size: 12px; }
+.report-link-list { display: grid; gap: 6px; }
+.report-link-button { display: grid; width: 100%; min-width: 0; gap: 3px; border: 1px solid #d8e2df; border-radius: 6px; background: #fff; color: #14211d; padding: 8px 10px; text-align: left; }
+.report-link-button:disabled { opacity: 0.55; }
+.report-link-button span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 800; }
+.report-link-button small { color: #64706b; overflow-wrap: anywhere; }
+.editor-actions { display: flex; flex-wrap: wrap; gap: 8px; }
+.danger-actions { border-top: 1px solid #e2ece8; padding-top: 10px; }
+.danger-actions .btn { border-color: #fecaca; color: #991b1b; }
+.source-message { margin: 0; border: 1px solid #bbf7d0; background: #f0fdf4; color: #166534; border-radius: 6px; padding: 8px 10px; font-size: 13px; }
+.source-error { margin: 0; border: 1px solid #fecaca; background: #fef2f2; color: #991b1b; border-radius: 6px; padding: 8px 10px; font-size: 13px; }
+.launch-blocker { margin: 0; color: #64706b; font-size: 12px; }
+@media (max-width: 640px) {
+  .mdtodo-detail-header { flex-direction: column; align-items: stretch; }
+  .detail-toolbar { justify-content: flex-start; }
+  .task-title-block { grid-template-columns: 1fr; }
+  .inline-editor { grid-template-columns: 1fr; }
+}
+</style>
+
diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskTree.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskTree.vue
new file mode 100644
index 00000000..578339ef
--- /dev/null
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoTaskTree.vue
@@ -0,0 +1,104 @@
+<!-- SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite. -->
+<!-- Responsibility: Rxx outline tree — fold, search, status filter, current highlight, deep-link auto-expand. -->
+
+<script setup lang="ts">
+import type { MdtodoTaskPage, MdtodoTaskRecord } from "@/api";
+import LoadingState from "@/components/common/LoadingState.vue";
+import EmptyState from "@/components/common/EmptyState.vue";
+import { statusLabel, taskIndent as indentStyle, useRxxTaskTree } from "@/composables/mdtodo/useMdtodoDisplay";
+
+const props = defineProps<{
+  tasks: MdtodoTaskRecord[];
+  fileScopedTaskCount: number;
+  taskPage: MdtodoTaskPage | null;
+  selectedTaskRef: string | null;
+  collapsedTaskRefs: Set<string>;
+  collapsed: boolean;
+  loading: boolean;
+  search: string;
+  statusFilter: string;
+}>();
+
+const emit = defineEmits<{
+  "update:search": [value: string];
+  "update:statusFilter": [value: string];
+  "update:collapsed": [value: boolean];
+  "update:collapsedTaskRefs": [value: Set<string>];
+  selectTask: [taskRef: string];
+  openCreateTask: [];
+}>();
+
+const tree = useRxxTaskTree(
+  () => props.tasks,
+  () => props.collapsedTaskRefs
+);
+
+function toggleTask(task: MdtodoTaskRecord): void {
+  const next = new Set(props.collapsedTaskRefs);
+  if (next.has(task.taskRef)) next.delete(task.taskRef);
+  else next.add(task.taskRef);
+  emit("update:collapsedTaskRefs", next);
+}
+</script>
+
+<template>
+  <section class="data-panel mdtodo-task-panel" data-testid="mdtodo-task-tree" :data-collapsed="collapsed">
+    <header class="mdtodo-panel-header">
+      <div><h2>{{ collapsed ? '纲' : '任务树' }}</h2><p v-if="!collapsed">{{ tree.visibleTaskRows.value.length }} / {{ taskPage?.total ?? fileScopedTaskCount }} tasks<span v-if="taskPage?.hasMore"> · window {{ taskPage.limit }}</span></p></div>
+      <div class="task-pane-actions">
+        <button class="icon-button" type="button" data-testid="mdtodo-new-task-open" aria-label="新建任务" @click="emit('openCreateTask')">+</button>
+        <button class="icon-button" type="button" data-testid="mdtodo-task-pane-toggle" :aria-label="collapsed ? '展开任务树' : '收起任务树'" @click="emit('update:collapsed', !collapsed)">{{ collapsed ? '›' : '‹' }}</button>
+      </div>
+      <div v-if="!collapsed" class="task-tools">
+        <input :value="search" data-testid="mdtodo-task-search" type="search" placeholder="R1 / title" aria-label="搜索任务" @input="emit('update:search', ($event.target as HTMLInputElement).value)" />
+        <select :value="statusFilter" data-testid="mdtodo-task-status-filter" aria-label="筛选状态" @change="emit('update:statusFilter', ($event.target as HTMLSelectElement).value)">
+          <option value="all">全部</option>
+          <option value="open">待办</option>
+          <option value="in_progress">进行中</option>
+          <option value="done">完成</option>
+          <option value="blocked">阻塞</option>
+        </select>
+      </div>
+    </header>
+    <template v-if="!collapsed">
+      <LoadingState v-if="loading" compact label="同步文件和任务" />
+      <EmptyState v-else-if="!tree.visibleTaskRows.value.length" title="暂无任务" description="当前文件没有任务投影。" />
+      <div v-else class="task-tree" role="tree" aria-label="MDTODO task tree">
+        <div v-for="task in tree.visibleTaskRows.value" :key="task.taskRef" class="task-row-shell" :style="indentStyle(task)">
+          <button class="task-toggle" type="button" :data-testid="tree.hasChildren(task) ? 'mdtodo-task-toggle' : undefined" :aria-label="props.collapsedTaskRefs.has(task.taskRef) ? '展开任务' : '折叠任务'" :disabled="!tree.hasChildren(task)" @click.stop="toggleTask(task)">{{ tree.hasChildren(task) ? (props.collapsedTaskRefs.has(task.taskRef) ? '+' : '-') : '' }}</button>
+          <button class="task-row" role="treeitem" type="button" :data-selected="task.taskRef === selectedTaskRef" :data-task-ref="task.taskRef" :data-task-id="task.taskId" :data-task-status="task.status || 'unknown'" @click="emit('selectTask', task.taskRef)">
+            <span class="task-id">{{ task.taskId || 'R?' }}</span>
+            <strong>{{ task.title || task.taskId || 'Untitled task' }}</strong>
+            <span class="task-status" :data-status="task.status || 'unknown'">{{ statusLabel(task.status) }}</span>
+          </button>
+        </div>
+      </div>
+    </template>
+  </section>
+</template>
+
+<style scoped>
+.data-panel { display: grid; min-width: 0; min-height: 0; height: 100%; align-content: start; gap: 12px; padding: 12px; overflow: hidden; grid-template-rows: auto auto minmax(0, 1fr); }
+.mdtodo-task-panel[data-collapsed="true"] { justify-items: center; padding: 8px 4px; overflow: hidden; grid-template-rows: auto auto; }
+.mdtodo-panel-header { display: flex; min-width: 0; align-items: center; justify-content: space-between; gap: 12px; }
+.mdtodo-panel-header h2 { margin: 0; color: #14211d; font-size: 16px; line-height: 1.2; }
+.mdtodo-panel-header p { margin: 3px 0 0; color: #64706b; font-size: 12px; }
+.task-pane-actions { display: flex; gap: 6px; margin-left: auto; }
+.task-tools { display: grid; width: min(360px, 100%); grid-template-columns: minmax(130px, 1fr) minmax(110px, 0.7fr); gap: 8px; }
+.task-tools input, .task-tools select { width: 100%; min-width: 0; height: 36px; border: 1px solid #cbd8d2; border-radius: 6px; background: #fff; color: #14211d; padding: 0 10px; font: inherit; }
+.task-tree { display: grid; min-height: 0; gap: 5px; overflow: auto; }
+.task-row-shell { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 4px; align-items: center; }
+.task-toggle { width: 24px; height: 24px; border: 1px solid #d8e2df; border-radius: 4px; background: #fff; color: #31423c; font-weight: 850; line-height: 1; }
+.task-toggle:disabled { border-color: transparent; background: transparent; }
+.task-row { display: grid; width: 100%; min-width: 0; grid-template-columns: minmax(52px, 0.22fr) minmax(0, 1fr) auto; gap: 8px; align-items: center; border: 1px solid #d8e2df; border-radius: 6px; background: #fff; color: #14211d; padding: 8px 10px; text-align: left; }
+.task-row[data-selected="true"] { border-color: #0f766e; background: #ecfdf5; box-shadow: inset 3px 0 0 #0f766e; }
+.task-id { color: #0f766e; font-size: 12px; font-weight: 850; }
+.task-row strong { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.task-status { display: inline-flex; width: fit-content; max-width: 100%; align-items: center; border-radius: 999px; border: 1px solid #bae6fd; background: #f0f9ff; color: #075985; padding: 4px 8px; font-size: 11px; font-weight: 750; line-height: 1; }
+.task-status[data-status="done"] { border-color: #86efac; background: #dcfce7; color: #166534; }
+.task-status[data-status="in_progress"] { border-color: #fde68a; background: #fffbeb; color: #92400e; }
+.task-status[data-status="blocked"] { border-color: #fed7aa; background: #fff7ed; color: #9a3412; }
+.icon-button { display: inline-grid; width: 36px; height: 36px; place-items: center; border: 1px solid #cbd8d2; border-radius: 6px; background: #fff; color: #14211d; font-weight: 850; }
+.icon-button:disabled { opacity: 0.5; }
+</style>
+
diff --git a/web/hwlab-cloud-web/src/components/mdtodo/MdtodoToolbar.vue b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoToolbar.vue
new file mode 100644
index 00000000..83a5cebc
--- /dev/null
+++ b/web/hwlab-cloud-web/src/components/mdtodo/MdtodoToolbar.vue
@@ -0,0 +1,82 @@
+<!-- SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite. -->
+<!-- Responsibility: narrow status toolbar — Source/File dropdowns, search, status filter, info/settings/create/reindex actions. -->
+
+<script setup lang="ts">
+import type { MdtodoFileRecord, ProjectSource } from "@/api";
+import { fileDisplayName } from "@/composables/mdtodo/useMdtodoDisplay";
+
+defineProps<{
+  sources: ProjectSource[];
+  selectedSourceId: string | null;
+  files: MdtodoFileRecord[];
+  selectedFileRef: string | null;
+  fileLoading: boolean;
+  reindexLoading: boolean;
+  selectedFileName: string;
+  selectedTaskLabel: string;
+}>();
+
+const emit = defineEmits<{
+  "update:selectedSourceId": [value: string | null];
+  "update:selectedFileRef": [value: string];
+  openSourceConfig: [];
+  reindex: [];
+  openInfo: [];
+  openCreateTask: [];
+}>();
+
+function onSourceSelect(event: Event): void {
+  emit("update:selectedSourceId", (event.target as HTMLSelectElement).value || null);
+}
+function onFileSelect(event: Event): void {
+  emit("update:selectedFileRef", (event.target as HTMLSelectElement).value);
+}
+</script>
+
+<template>
+  <section class="mdtodo-toolbar" data-testid="mdtodo-toolbar" aria-label="MDTODO controls">
+    <label class="toolbar-field" data-testid="mdtodo-source-list">
+      <span>Source</span>
+      <select data-testid="mdtodo-source-select" :value="selectedSourceId || ''" @change="onSourceSelect">
+        <option v-for="source in sources" :key="source.sourceId" :value="source.sourceId">{{ source.displayName || source.sourceId }}</option>
+      </select>
+    </label>
+    <label class="toolbar-field" data-testid="mdtodo-file-control">
+      <span>File</span>
+      <select data-testid="mdtodo-file-select" :value="selectedFileRef || ''" :disabled="fileLoading || !files.length" @change="onFileSelect">
+        <option v-for="file in files" :key="file.fileRef" :value="file.fileRef">{{ fileDisplayName(file) }}</option>
+      </select>
+    </label>
+    <div class="toolbar-context">
+      <span class="toolbar-file-name" :title="selectedFileName">{{ selectedFileName }}</span>
+      <small v-if="selectedTaskLabel" class="toolbar-task-label">{{ selectedTaskLabel }}</small>
+    </div>
+    <div class="toolbar-actions">
+      <button class="btn btn-secondary" type="button" data-testid="mdtodo-new-task-open" @click="emit('openCreateTask')">+ 任务</button>
+      <button class="icon-button" type="button" data-testid="mdtodo-source-config-open" aria-label="配置 Source" @click="emit('openSourceConfig')">⚙</button>
+      <button class="icon-button" type="button" data-testid="mdtodo-source-reindex" aria-label="重建索引" :disabled="!selectedSourceId || reindexLoading" @click="emit('reindex')">↻</button>
+      <button class="icon-button" type="button" data-testid="mdtodo-info-open" aria-label="查看摘要" @click="emit('openInfo')">ⓘ</button>
+    </div>
+  </section>
+</template>
+
+<style scoped>
+.mdtodo-toolbar { display: grid; grid-template-columns: minmax(180px, 0.8fr) minmax(220px, 1fr) minmax(0, 1fr) auto; gap: 10px; align-items: end; border: 1px solid #d8e2df; border-radius: 8px; background: #fbfdfb; padding: 8px; }
+.toolbar-field { display: grid; min-width: 0; gap: 5px; }
+.toolbar-field span { color: #52615c; font-size: 11px; font-weight: 800; text-transform: uppercase; }
+.toolbar-field select { width: 100%; min-width: 0; height: 36px; border: 1px solid #cbd8d2; border-radius: 6px; background: #fff; color: #14211d; padding: 0 10px; font: inherit; }
+.toolbar-context { display: grid; min-width: 0; gap: 2px; align-content: center; padding: 0 4px; }
+.toolbar-file-name { min-width: 0; overflow: hidden; color: #14211d; font-size: 12px; font-weight: 750; text-overflow: ellipsis; white-space: nowrap; }
+.toolbar-task-label { color: #0f766e; font-size: 11px; font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.toolbar-actions { display: flex; gap: 8px; justify-content: flex-end; align-items: center; }
+.icon-button { display: inline-grid; width: 36px; height: 36px; place-items: center; border: 1px solid #cbd8d2; border-radius: 6px; background: #fff; color: #14211d; font-weight: 850; }
+.icon-button:disabled { opacity: 0.5; }
+@media (max-width: 980px) {
+  .mdtodo-toolbar { grid-template-columns: 1fr 1fr auto; }
+  .toolbar-context { display: none; }
+}
+@media (max-width: 640px) {
+  .mdtodo-toolbar { grid-template-columns: 1fr; }
+}
+</style>
+
diff --git a/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoDisplay.ts b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoDisplay.ts
new file mode 100644
index 00000000..c72e7601
--- /dev/null
+++ b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoDisplay.ts
@@ -0,0 +1,86 @@
+// SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite.
+// Responsibility: shared display helpers and Rxx tree derivation (no business authority).
+
+import { computed } from "vue";
+import type { ComputedRef } from "vue";
+import type { MdtodoFileRecord, MdtodoTaskRecord } from "@/api";
+
+/** File dropdown shows the direct docs/MDTODO/ file name, not internal titles. */
+export function fileDisplayName(file: MdtodoFileRecord): string {
+  const path = file.relativePath || file.fileRef || "-";
+  return path.split("/").filter(Boolean).at(-1) || path;
+}
+
+export function statusLabel(value?: string | null): string {
+  if (value === "done") return "完成";
+  if (value === "blocked") return "阻塞";
+  if (value === "in_progress") return "进行中";
+  if (value === "open") return "待办";
+  return value || "未知";
+}
+
+export function sourceStatusTone(value?: string | null): string {
+  if (value === "active" || value === "ok" || value === "ready") return "ok";
+  if (value === "blocked" || value === "error" || value === "failed") return "error";
+  return "pending";
+}
+
+export function displayDate(value?: string | null): string {
+  if (!value) return "-";
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) return value;
+  return date.toLocaleString("zh-CN", { month: "2-digit", day: "2-digit", hour: "2-digit", minute: "2-digit" });
+}
+
+export function shortRef(value?: string | null): string {
+  if (!value) return "-";
+  return value.length > 42 ? `${value.slice(0, 24)}...${value.slice(-10)}` : value;
+}
+
+/** Indent style for a task row based on its Rxx depth. */
+export function taskIndent(task: MdtodoTaskRecord): Record<string, string> {
+  return { paddingInlineStart: `${12 + Math.max(0, task.depth ?? 0) * 22}px` };
+}
+
+/**
+ * Rxx task tree: R1 is a root, R1.1 is a child of R1, R1.1.1 is a child of R1.1.
+ * Hierarchy is derived from taskRef/rxxId prefixes, NOT from Markdown heading
+ * counts or checkbox indentation. Returns children-by-parent map and visible rows.
+ */
+export function useRxxTaskTree(
+  tasks: ComputedRef<MdtodoTaskRecord[]> | (() => MdtodoTaskRecord[]),
+  collapsedTaskRefs: () => Set<string>
+) {
+  const taskList = computed(() => (typeof tasks === "function" ? (tasks as () => MdtodoTaskRecord[])() : tasks.value));
+
+  const childrenByParent = computed(() => {
+    const byRef = new Map(taskList.value.map((task) => [task.taskRef, task]));
+    const map = new Map<string, MdtodoTaskRecord[]>();
+    for (const task of taskList.value) {
+      const parent = task.parentTaskRef && byRef.has(task.parentTaskRef) ? task.parentTaskRef : "root";
+      const list = map.get(parent) ?? [];
+      list.push(task);
+      map.set(parent, list);
+    }
+    for (const list of map.values()) list.sort((a, b) => (a.ordinal ?? 0) - (b.ordinal ?? 0) || String(a.taskId ?? "").localeCompare(String(b.taskId ?? "")));
+    return map;
+  });
+
+  const visibleTaskRows = computed(() => {
+    const rows: MdtodoTaskRecord[] = [];
+    const visit = (task: MdtodoTaskRecord) => {
+      rows.push(task);
+      if (collapsedTaskRefs().has(task.taskRef)) return;
+      for (const child of childrenByParent.value.get(task.taskRef) ?? []) visit(child);
+    };
+    for (const task of childrenByParent.value.get("root") ?? []) visit(task);
+    return rows;
+  });
+
+  function hasChildren(task: MdtodoTaskRecord): boolean {
+    return (childrenByParent.value.get(task.taskRef) ?? []).length > 0;
+  }
+
+  return { childrenByParent, visibleTaskRows, hasChildren, taskIndent };
+}
+
diff --git a/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoReportPreview.ts b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoReportPreview.ts
new file mode 100644
index 00000000..7c94f94e
--- /dev/null
+++ b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoReportPreview.ts
@@ -0,0 +1,86 @@
+// SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite.
+// Responsibility: report link preview, fullscreen and close/restore via public API.
+
+import { ref } from "vue";
+import DOMPurify from "dompurify";
+import { marked } from "marked";
+import { projectManagementAPI, type MdtodoReportPreviewRecord, type MdtodoTaskLinkRecord } from "@/api";
+
+/**
+ * Parses task-body Markdown links into report links, opens the right-pane
+ * preview, supports fullscreen and close-restore. Reports use a mature Markdown
+ * renderer with sanitization and light Workbench-style code blocks; long
+ * JSON/RPC scrolls inside the pane. Report files never enter the File dropdown.
+ */
+export function useMdtodoReportPreview() {
+  const reportPreview = ref<MdtodoReportPreviewRecord | null>(null);
+  const activeReportLink = ref<MdtodoTaskLinkRecord | null>(null);
+  const reportLoading = ref(false);
+  const reportError = ref<string | null>(null);
+  const showReportFullscreen = ref(false);
+
+  function markdownToHtml(value?: string | null): string {
+    const text = String(value ?? "").trim();
+    if (!text) return "";
+    return DOMPurify.sanitize(marked.parse(text, { async: false }) as string);
+  }
+
+  async function openReportPreview(taskRef: string, link: MdtodoTaskLinkRecord): Promise<MdtodoReportPreviewRecord | null> {
+    if (!link.linkId || link.kind !== "markdown-report") return null;
+    reportLoading.value = true;
+    reportError.value = null;
+    try {
+      const response = await projectManagementAPI.reportPreview(taskRef, link.linkId);
+      if (!response.ok) throw response;
+      const report = response.data?.report ?? null;
+      if (!report?.content) throw new Error("报告内容未返回");
+      reportPreview.value = report;
+      activeReportLink.value = response.data?.link ?? link;
+      return report;
+    } catch (err) {
+      reportError.value = err && typeof err === "object" && "error" in err ? String((err as { error?: string }).error || "报告加载失败") : "报告加载失败";
+      return null;
+    } finally {
+      reportLoading.value = false;
+    }
+  }
+
+  async function openReportPreviewById(taskRef: string, links: MdtodoTaskLinkRecord[], linkId: string): Promise<MdtodoReportPreviewRecord | null> {
+    const target = links.find((link) => link.linkId === linkId || link.label === linkId || link.relativePath?.includes(linkId) || link.href?.includes(linkId));
+    if (!target) {
+      reportError.value = `报告链接未找到: ${linkId}`;
+      return null;
+    }
+    return openReportPreview(taskRef, target);
+  }
+
+  function closeReportPreview(): void {
+    reportPreview.value = null;
+    activeReportLink.value = null;
+    showReportFullscreen.value = false;
+    reportError.value = null;
+  }
+
+  function openFullscreen(): void {
+    if (reportPreview.value) showReportFullscreen.value = true;
+  }
+
+  function closeFullscreen(): void {
+    showReportFullscreen.value = false;
+  }
+
+  return {
+    reportPreview,
+    activeReportLink,
+    reportLoading,
+    reportError,
+    showReportFullscreen,
+    markdownToHtml,
+    openReportPreview,
+    openReportPreviewById,
+    closeReportPreview,
+    openFullscreen,
+    closeFullscreen
+  };
+}
+
diff --git a/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoRouteSelection.ts b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoRouteSelection.ts
new file mode 100644
index 00000000..ac374003
--- /dev/null
+++ b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoRouteSelection.ts
@@ -0,0 +1,80 @@
+// SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite.
+// Responsibility: URL is the authority for source/file/task/report selection; RESTful deep-link restore.
+
+import { ref } from "vue";
+import type { Router, RouteLocationNormalized } from "vue-router";
+
+export type RouteName = "ProjectMdtodo" | "ProjectMdtodoFile" | "ProjectMdtodoTask" | "ProjectMdtodoReport";
+
+export interface MdtodoRouteSelection {
+  sourceId: string | null;
+  fileRef: string | null;
+  taskId: string | null;
+  linkId: string | null;
+}
+
+export interface UseMdtodoRouteSelectionOptions {
+  router: Router;
+  route: RouteLocationNormalized;
+}
+
+/**
+ * URL is the authority for selection state. Components may cache fold widths and
+ * edit drafts locally, but source/file/task/report business selection must be
+ * restorable from the URL after refresh, back/forward or web-probe deep links.
+ */
+export function useMdtodoRouteSelection({ router, route }: UseMdtodoRouteSelectionOptions) {
+  const applyingRouteSelection = ref(false);
+
+  function routeParam(key: string): string | null {
+    const value = (route.params as Record<string, unknown>)[key];
+    const text = Array.isArray(value) ? value[0] : value;
+    return typeof text === "string" && text.trim() ? text.trim() : null;
+  }
+
+  function readSelection(): MdtodoRouteSelection {
+    return {
+      sourceId: routeParam("sourceId"),
+      fileRef: routeParam("fileRef"),
+      taskId: routeParam("taskId"),
+      linkId: routeParam("linkId")
+    };
+  }
+
+  function routeSelectionOptions(updateRoute: boolean): { fileRef?: string | null; taskId?: string | null; reportLinkId?: string | null; updateRoute: boolean } {
+    return {
+      fileRef: routeParam("fileRef"),
+      taskId: routeParam("taskId"),
+      reportLinkId: routeParam("linkId"),
+      updateRoute
+    };
+  }
+
+  async function syncSelectionRoute(options: {
+    sourceId: string | null;
+    fileRef: string | null;
+    taskId?: string | null;
+    reportLinkId?: string | null;
+    replace?: boolean;
+  }): Promise<void> {
+    const { sourceId, fileRef, taskId, reportLinkId, replace } = options;
+    if (!sourceId || !fileRef) return;
+    const name: RouteName = reportLinkId && taskId ? "ProjectMdtodoReport" : taskId ? "ProjectMdtodoTask" : "ProjectMdtodoFile";
+    const params: Record<string, string> = { sourceId, fileRef };
+    if (taskId) params.taskId = taskId;
+    if (reportLinkId) params.linkId = reportLinkId;
+    const navigation = { name, params };
+    const resolved = router.resolve(navigation);
+    if (resolved.fullPath === route.fullPath) return;
+    if (replace) await router.replace(navigation);
+    else await router.push(navigation);
+  }
+
+  return {
+    applyingRouteSelection,
+    readSelection,
+    routeSelectionOptions,
+    syncSelectionRoute
+  };
+}
+
diff --git a/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoSource.ts b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoSource.ts
new file mode 100644
index 00000000..d1dfd85a
--- /dev/null
+++ b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoSource.ts
@@ -0,0 +1,157 @@
+// SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite.
+// Responsibility: MDTODO source list, HWPOD-bound source config, probe and reindex via public API.
+
+import { reactive, ref } from "vue";
+import { projectManagementAPI, type ProjectSource, type ProjectSourceInput, type ProjectNavigationResponse } from "@/api";
+import type { ApiError, ErrorDiagnostic } from "@/types";
+
+export interface UseMdtodoSourceReturn {
+  sources: ReturnType<typeof ref<ProjectSource[]>>;
+  navigation: ReturnType<typeof ref<ProjectNavigationResponse | null>>;
+  sourceForm: ReturnType<typeof reactive<ProjectSourceInput>>;
+  sourceMessage: ReturnType<typeof ref<string | null>>;
+  sourceError: ReturnType<typeof ref<string | null>>;
+  sourceSaving: ReturnType<typeof ref<boolean>>;
+  sourceProbeLoading: ReturnType<typeof ref<boolean>>;
+  sourceReindexLoading: ReturnType<typeof ref<boolean>>;
+  loadNavigationAndSources: () => Promise<{ navigation: ProjectNavigationResponse | null; sources: ProjectSource[] }>;
+  openSourceForm: (source: ProjectSource | null) => void;
+  saveSourceConfig: () => Promise<string | null>;
+  probeSource: (sourceId?: string | null) => Promise<void>;
+  reindexSource: (sourceId: string) => Promise<{ documentCount: number; taskCount: number } | null>;
+  clearSourceMessages: () => void;
+}
+
+function apiErrorOf(err: unknown): { error: string; apiError: ApiError | null; diagnostic: ErrorDiagnostic | null } {
+  if (err && typeof err === "object" && "error" in err) {
+    const result = err as { error?: string | null; apiError?: ApiError | null; diagnostic?: ErrorDiagnostic | null; status?: number };
+    return { error: result.error || `HTTP ${result.status ?? "unknown"}`, apiError: result.apiError ?? null, diagnostic: result.diagnostic ?? null };
+  }
+  return { error: err instanceof Error ? err.message : String(err || "MDTODO source 操作失败"), apiError: null, diagnostic: null };
+}
+
+export function useMdtodoSource() {
+  const sources = ref<ProjectSource[]>([]);
+  const navigation = ref<ProjectNavigationResponse | null>(null);
+  const sourceForm = reactive<ProjectSourceInput>({
+    sourceId: "d601-f103-v2-mdtodo",
+    sourceKind: "hwpod-workspace",
+    displayName: "D601 F103 MDTODO",
+    projectId: "project_hwlab_v03",
+    hwpodId: "d601-f103-v2",
+    nodeId: "node-d601-f103-v2",
+    workspaceRootRef: "",
+    mdtodoRootRef: "docs/MDTODO/",
+    maxFiles: 120
+  });
+  const sourceMessage = ref<string | null>(null);
+  const sourceError = ref<string | null>(null);
+  const sourceSaving = ref(false);
+  const sourceProbeLoading = ref(false);
+  const sourceReindexLoading = ref(false);
+
+  async function loadNavigationAndSources(): Promise<{ navigation: ProjectNavigationResponse | null; sources: ProjectSource[] }> {
+    const [navigationResponse, sourceResponse] = await Promise.all([projectManagementAPI.navigation(), projectManagementAPI.sources()]);
+    if (!navigationResponse.ok) throw navigationResponse;
+    if (!sourceResponse.ok) throw sourceResponse;
+    navigation.value = navigationResponse.data ?? null;
+    sources.value = sourceResponse.data?.sources ?? [];
+    return { navigation: navigation.value, sources: sources.value };
+  }
+
+  function openSourceForm(source: ProjectSource | null): void {
+    sourceMessage.value = null;
+    sourceError.value = null;
+    Object.assign(sourceForm, {
+      sourceId: source?.sourceKind === "hwpod-workspace" ? source.sourceId : "d601-f103-v2-mdtodo",
+      sourceKind: "hwpod-workspace",
+      displayName: source?.sourceKind === "hwpod-workspace" ? source.displayName : "D601 F103 MDTODO",
+      projectId: source?.projectId || "project_hwlab_v03",
+      hwpodId: source?.hwpodId || "d601-f103-v2",
+      nodeId: source?.nodeId || "node-d601-f103-v2",
+      workspaceRootRef: source?.workspaceRootRef || "",
+      mdtodoRootRef: source?.mdtodoRootRef || "docs/MDTODO/",
+      maxFiles: source?.maxFiles || 120
+    });
+  }
+
+  async function saveSourceConfig(): Promise<string | null> {
+    sourceSaving.value = true;
+    sourceMessage.value = null;
+    sourceError.value = null;
+    try {
+      const sourceId = String(sourceForm.sourceId || "").trim();
+      const exists = Boolean(sourceId && sources.value.some((source) => source.sourceId === sourceId));
+      const response = exists ? await projectManagementAPI.updateSource(sourceId, sourceForm) : await projectManagementAPI.createSource(sourceForm);
+      if (!response.ok) throw response;
+      const savedId = response.data?.source?.sourceId ?? sourceId;
+      sourceMessage.value = "Source 已保存";
+      await loadNavigationAndSources();
+      return savedId;
+    } catch (err) {
+      sourceError.value = apiErrorOf(err).error;
+      return null;
+    } finally {
+      sourceSaving.value = false;
+    }
+  }
+
+  async function probeSource(sourceId?: string | null): Promise<void> {
+    const id = sourceId || sourceForm.sourceId;
+    if (!id) return;
+    sourceProbeLoading.value = true;
+    sourceMessage.value = null;
+    sourceError.value = null;
+    try {
+      const response = await projectManagementAPI.probeSource(id);
+      if (!response.ok) throw response;
+      sourceMessage.value = `Probe ${response.data?.probe?.status || "ok"}`;
+    } catch (err) {
+      sourceError.value = apiErrorOf(err).error;
+    } finally {
+      sourceProbeLoading.value = false;
+    }
+  }
+
+  async function reindexSource(sourceId: string): Promise<{ documentCount: number; taskCount: number } | null> {
+    sourceReindexLoading.value = true;
+    sourceMessage.value = null;
+    sourceError.value = null;
+    try {
+      const response = await projectManagementAPI.reindexSource(sourceId);
+      if (!response.ok) throw response;
+      const documentCount = response.data?.projection?.documentCount ?? 0;
+      const taskCount = response.data?.projection?.taskCount ?? 0;
+      sourceMessage.value = `Reindex ${documentCount} files / ${taskCount} tasks`;
+      return { documentCount, taskCount };
+    } catch (err) {
+      sourceError.value = apiErrorOf(err).error;
+      return null;
+    } finally {
+      sourceReindexLoading.value = false;
+    }
+  }
+
+  function clearSourceMessages(): void {
+    sourceMessage.value = null;
+    sourceError.value = null;
+  }
+
+  return {
+    sources,
+    navigation,
+    sourceForm,
+    sourceMessage,
+    sourceError,
+    sourceSaving,
+    sourceProbeLoading,
+    sourceReindexLoading,
+    loadNavigationAndSources,
+    openSourceForm,
+    saveSourceConfig,
+    probeSource,
+    reindexSource,
+    clearSourceMessages
+  };
+}
+
diff --git a/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoTaskData.ts b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoTaskData.ts
new file mode 100644
index 00000000..31eba068
--- /dev/null
+++ b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoTaskData.ts
@@ -0,0 +1,104 @@
+// SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite.
+// Responsibility: file list, Rxx task window, task detail and workbench links loading via public API.
+
+import { computed, ref } from "vue";
+import { projectManagementAPI, type MdtodoFileRecord, type MdtodoTaskRecord, type MdtodoTaskDetailRecord, type MdtodoTaskPage, type ProjectWorkbenchLinkRecord } from "@/api";
+
+const TASK_WINDOW_LIMIT = 200;
+
+/**
+ * Loads MDTODO files, the Rxx task window for a selected file, task detail body
+ * and workbench links through the public Project Management API. The Rxx tree
+ * hierarchy (R1/R1.1/R1.1.1) is derived from taskRef prefixes, not from Markdown
+ * heading counts or checkbox indentation.
+ */
+export function useMdtodoTaskData() {
+  const files = ref<MdtodoFileRecord[]>([]);
+  const tasks = ref<MdtodoTaskRecord[]>([]);
+  const taskPage = ref<MdtodoTaskPage | null>(null);
+  const taskDetail = ref<MdtodoTaskDetailRecord | null>(null);
+  const links = ref<ProjectWorkbenchLinkRecord[]>([]);
+  const taskLoading = ref(false);
+  const taskDetailLoading = ref(false);
+  const linkLoading = ref(false);
+  const taskDetailError = ref<string | null>(null);
+
+  const taskByRef = computed(() => new Map(tasks.value.map((task) => [task.taskRef, task])));
+
+  async function loadFiles(sourceId: string): Promise<MdtodoFileRecord[]> {
+    const fileResponse = await projectManagementAPI.files(sourceId);
+    if (!fileResponse.ok) throw fileResponse;
+    files.value = fileResponse.data?.files ?? [];
+    return files.value;
+  }
+
+  async function loadTaskWindow(sourceId: string, fileRef: string | null, preferredTaskRef?: string | null): Promise<MdtodoTaskRecord[]> {
+    const taskResponse = await projectManagementAPI.tasks({ sourceId, fileRef, limit: TASK_WINDOW_LIMIT });
+    if (!taskResponse.ok) throw taskResponse;
+    tasks.value = taskResponse.data?.tasks ?? [];
+    taskPage.value = taskResponse.data?.page ?? null;
+    return tasks.value;
+  }
+
+  function resolvePreferredTask(preferredTaskRef?: string | null): MdtodoTaskRecord | null {
+    if (!preferredTaskRef) return null;
+    return tasks.value.find((task) => task.taskRef === preferredTaskRef || task.taskId === preferredTaskRef || task.rxxId === preferredTaskRef) ?? null;
+  }
+
+  async function loadTaskDetail(taskRef: string | null): Promise<void> {
+    taskDetailError.value = null;
+    if (!taskRef) {
+      taskDetail.value = null;
+      return;
+    }
+    taskDetailLoading.value = true;
+    try {
+      const response = await projectManagementAPI.taskDetail(taskRef);
+      if (!response.ok) throw response;
+      taskDetail.value = response.data?.detail ?? null;
+    } catch (err) {
+      taskDetail.value = null;
+      taskDetailError.value = err && typeof err === "object" && "error" in err ? String((err as { error?: string }).error || "任务详情加载失败") : "任务详情加载失败";
+    } finally {
+      taskDetailLoading.value = false;
+    }
+  }
+
+  async function loadLinks(taskRef: string | null): Promise<void> {
+    linkLoading.value = true;
+    try {
+      const response = await projectManagementAPI.workbenchLinks(taskRef ? { taskRef } : {});
+      if (!response.ok) throw response;
+      links.value = response.data?.links ?? [];
+    } catch {
+      links.value = [];
+    } finally {
+      linkLoading.value = false;
+    }
+  }
+
+  function clearTaskDetailAndReport(): void {
+    taskDetail.value = null;
+    taskDetailError.value = null;
+  }
+
+  return {
+    files,
+    tasks,
+    taskPage,
+    taskDetail,
+    links,
+    taskLoading,
+    taskDetailLoading,
+    linkLoading,
+    taskDetailError,
+    taskByRef,
+    loadFiles,
+    loadTaskWindow,
+    resolvePreferredTask,
+    loadTaskDetail,
+    loadLinks,
+    clearTaskDetailAndReport
+  };
+}
+
diff --git a/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoTaskMutation.ts b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoTaskMutation.ts
new file mode 100644
index 00000000..d806a2fb
--- /dev/null
+++ b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoTaskMutation.ts
@@ -0,0 +1,99 @@
+// SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite.
+// Responsibility: task create/update/delete via public API with revision/fingerprint concurrency protection.
+
+import { ref } from "vue";
+import { projectManagementAPI, type MdtodoTaskMutationInput, type MdtodoTaskRecord } from "@/api";
+import type { ApiError, ErrorDiagnostic } from "@/types";
+
+function mutationErrorOf(err: unknown): { error: string; apiError: ApiError | null; diagnostic: ErrorDiagnostic | null } {
+  if (err && typeof err === "object" && "error" in err) {
+    const result = err as { error?: string | null; apiError?: ApiError | null; diagnostic?: ErrorDiagnostic | null; status?: number };
+    return { error: result.error || `HTTP ${result.status ?? "unknown"}`, apiError: result.apiError ?? null, diagnostic: result.diagnostic ?? null };
+  }
+  return { error: err instanceof Error ? err.message : String(err || "任务操作失败"), apiError: null, diagnostic: null };
+}
+
+/**
+ * All task mutations go through the public Project Management API and carry an
+ * expectedFingerprint/revision for optimistic-concurrency protection. The frontend
+ * may optimistic-update, but on API failure, version conflict, parse error or
+ * HWPOD offline it must roll back or surface a recoverable error. The frontend
+ * never edits Markdown files directly or persists to localStorage.
+ */
+export function useMdtodoTaskMutation() {
+  const taskMutationLoading = ref(false);
+  const taskMutationError = ref<string | null>(null);
+  const taskMutationMessage = ref<string | null>(null);
+
+  function clearMessages(): void {
+    taskMutationError.value = null;
+    taskMutationMessage.value = null;
+  }
+
+  /**
+   * Run a mutation action, then refresh the caller-provided reload function and
+   * return the resulting taskRef so the caller can reselect. On conflict/failure
+   * the error is surfaced and the caller decides whether to roll back the local
+   * edit draft.
+   */
+  async function runTaskMutation(
+    action: () => ReturnType<typeof projectManagementAPI.updateTask>,
+    preferredTaskRef: string | undefined,
+    message: string,
+    onAfterMutate: () => Promise<void>
+  ): Promise<string | null> {
+    taskMutationLoading.value = true;
+    taskMutationError.value = null;
+    taskMutationMessage.value = null;
+    try {
+      const response = await action();
+      if (!response.ok) throw response;
+      const nextTaskRef = response.data?.task?.taskRef || preferredTaskRef || null;
+      await onAfterMutate();
+      taskMutationMessage.value = message;
+      return nextTaskRef;
+    } catch (err) {
+      taskMutationError.value = mutationErrorOf(err).error;
+      return null;
+    } finally {
+      taskMutationLoading.value = false;
+    }
+  }
+
+  async function updateTask(
+    taskRef: string,
+    input: MdtodoTaskMutationInput,
+    message: string,
+    onAfterMutate: () => Promise<void>
+  ): Promise<string | null> {
+    return runTaskMutation(() => projectManagementAPI.updateTask(taskRef, input), taskRef, message, onAfterMutate);
+  }
+
+  async function createTask(
+    input: MdtodoTaskMutationInput,
+    message: string,
+    onAfterMutate: () => Promise<void>
+  ): Promise<string | null> {
+    return runTaskMutation(() => projectManagementAPI.createTask(input), undefined, message, onAfterMutate);
+  }
+
+  async function deleteTask(
+    taskRef: string,
+    input: MdtodoTaskMutationInput,
+    onAfterMutate: () => Promise<void>
+  ): Promise<string | null> {
+    return runTaskMutation(() => projectManagementAPI.deleteTask(taskRef, input), undefined, "任务已删除", onAfterMutate);
+  }
+
+  return {
+    taskMutationLoading,
+    taskMutationError,
+    taskMutationMessage,
+    clearMessages,
+    runTaskMutation,
+    updateTask,
+    createTask,
+    deleteTask
+  };
+}
+
diff --git a/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoWorkbenchLaunch.ts b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoWorkbenchLaunch.ts
new file mode 100644
index 00000000..470bdb62
--- /dev/null
+++ b/web/hwlab-cloud-web/src/composables/mdtodo/useMdtodoWorkbenchLaunch.ts
@@ -0,0 +1,156 @@
+// SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite.
+// Responsibility: Workbench launch with first-round task context via public Launch API.
+
+import { ref } from "vue";
+import { agentAPI, workbenchAPI, type MdtodoTaskLinkRecord, type MdtodoTaskRecord, type ProjectNavigationResponse } from "@/api";
+import type { Router } from "vue-router";
+
+export interface WorkbenchLaunchContext {
+  source: string;
+  projectId: string;
+  taskRef: string;
+  sourceId?: string;
+  fileRef?: string;
+  fileName?: string;
+  taskId?: string;
+  title?: string;
+  status?: string;
+  bodyPreview: string;
+  reportLinks: { linkId?: string; label?: string; href?: string; relativePath?: string | null }[];
+}
+
+/**
+ * Launches a Workbench session through the public Workbench Launch API and seeds
+ * it with a first-round user message built from the MDTODO task context. An empty
+ * session is never treated as success: the launch must return a sessionId and the
+ * session must project a first user message before navigation. MDTODO and
+ * Workbench relate only via public API and IDs.
+ */
+export function useMdtodoWorkbenchLaunch(router: Router) {
+  const launchLoading = ref(false);
+  const launchError = ref<string | null>(null);
+  const launchResult = ref<{ sessionId: string; workbenchUrl: string } | null>(null);
+
+  function buildPrompt(task: MdtodoTaskRecord, body: string, links: MdtodoTaskLinkRecord[], fileName: string): string {
+    const reportLines = links
+      .filter((link) => link.kind === "markdown-report")
+      .map((link) => `- ${link.label || link.href}: ${link.relativePath || link.href}`)
+      .join("\n");
+    return [
+      "请基于以下 MDTODO 任务开始工作，先读取相关文件和报告，再给出下一步执行结果。",
+      "",
+      `Task: ${task.taskId || task.taskRef} ${task.title || ""}`.trim(),
+      `TaskRef: ${task.taskRef}`,
+      `File: ${fileName || task.fileRef || "-"}`,
+      `Status: ${task.status || "open"}`,
+      "",
+      "任务正文:",
+      body.trim() || "(无正文)",
+      "",
+      "相关报告链接:",
+      reportLines || "(无)"
+    ].join("\n");
+  }
+
+  function buildContext(task: MdtodoTaskRecord, body: string, links: MdtodoTaskLinkRecord[], fileName: string): WorkbenchLaunchContext {
+    return {
+      source: "mdtodo-page",
+      projectId: task.projectId || "",
+      taskRef: task.taskRef,
+      sourceId: task.sourceId,
+      fileRef: task.fileRef,
+      fileName,
+      taskId: task.taskId,
+      title: task.title,
+      status: task.status,
+      bodyPreview: body.slice(0, 800),
+      reportLinks: links.filter((link) => link.kind === "markdown-report").map((link) => ({ linkId: link.linkId, label: link.label, href: link.href, relativePath: link.relativePath }))
+    };
+  }
+
+  async function waitSessionHasPrompt(sessionId: string): Promise<void> {
+    for (let attempt = 0; attempt < 5; attempt += 1) {
+      const response = await workbenchAPI.session(sessionId, 8000);
+      if (response.ok) {
+        const session = response.data?.session as { messageCount?: number; messages?: unknown[]; firstUserMessagePreview?: string | null } | undefined;
+        const count = Number(session?.messageCount ?? (Array.isArray(session?.messages) ? session.messages.length : 0));
+        if (count > 0 || String(session?.firstUserMessagePreview ?? "").trim()) return;
+      }
+      await sleep(800);
+    }
+    throw new Error("Workbench session 已创建但未投影 MDTODO prompt");
+  }
+
+  function sleep(ms: number): Promise<void> {
+    return new Promise((resolve) => window.setTimeout(resolve, ms));
+  }
+
+  async function launchTask(
+    task: MdtodoTaskRecord,
+    body: string,
+    links: MdtodoTaskLinkRecord[],
+    fileName: string,
+    navigation: ProjectNavigationResponse | null
+  ): Promise<{ sessionId: string; workbenchUrl: string } | null> {
+    if (!task.taskRef || !task.projectId) return null;
+    const enabled = navigation?.navigation?.capabilities?.workbenchLaunch === true;
+    if (!enabled) {
+      launchError.value = "Workbench Launch capability unavailable";
+      return null;
+    }
+    launchLoading.value = true;
+    launchError.value = null;
+    try {
+      const prompt = buildPrompt(task, body, links, fileName);
+      const launchContext = buildContext(task, body, links, fileName);
+      const response = await workbenchAPI.launch({
+        projectId: task.projectId,
+        taskRef: task.taskRef,
+        providerProfile: "codex",
+        launchContext
+      });
+      if (!response.ok) throw response;
+      const sessionId = response.data?.sessionId;
+      if (!sessionId) throw new Error("Workbench launch 未返回 sessionId");
+      const chat = await agentAPI.sendAgentMessage({
+        message: prompt,
+        prompt,
+        sessionId,
+        providerProfile: "codex",
+        projectId: task.projectId,
+        taskRef: task.taskRef,
+        launchContext
+      }, 120000);
+      if (!chat.ok) throw chat;
+      await waitSessionHasPrompt(sessionId);
+      const result = { sessionId, workbenchUrl: response.data?.workbenchUrl || `/workbench/sessions/${encodeURIComponent(sessionId)}` };
+      launchResult.value = result;
+      return result;
+    } catch (err) {
+      launchError.value = err && typeof err === "object" && "error" in err ? String((err as { error?: string }).error || "Workbench launch 失败") : "Workbench launch 失败";
+      return null;
+    } finally {
+      launchLoading.value = false;
+    }
+  }
+
+  async function navigateToWorkbench(result: { sessionId: string; workbenchUrl: string }): Promise<void> {
+    await router.push(result.workbenchUrl);
+  }
+
+  function isLaunchEnabled(navigation: ProjectNavigationResponse | null): boolean {
+    return navigation?.navigation?.capabilities?.workbenchLaunch === true;
+  }
+
+  return {
+    launchLoading,
+    launchError,
+    launchResult,
+    buildPrompt,
+    buildContext,
+    launchTask,
+    navigateToWorkbench,
+    isLaunchEnabled
+  };
+}
+
diff --git a/web/hwlab-cloud-web/src/views/projects/MdtodoView.vue b/web/hwlab-cloud-web/src/views/projects/MdtodoView.vue
index 07eec974..84fdaefe 100644
--- a/web/hwlab-cloud-web/src/views/projects/MdtodoView.vue
+++ b/web/hwlab-cloud-web/src/views/projects/MdtodoView.vue
@@ -1,1125 +1,10 @@
-<!-- SPEC: PJ2026-010404 项目管理 draft-2026-06-25-p0-project-management-mdtodo; draft-2026-06-26-p1-mdtodo-web-operable. -->
-<!-- Responsibility: MDTODO project page consuming public ProjectTask DTOs and Workbench launch DTOs without Workbench or Markdown internals. -->
-
+<!-- SPEC: PJ2026-01040409 MDTODO前端重写; draft-2026-06-26-p0-mdtodo-web-rewrite. -->
+<!-- Responsibility: thin route entry that mounts the decomposed MdtodoPageShell. The previous 1125-line
+     monolithic implementation has been replaced by SPEC §5.1 components and composables. -->
 <script setup lang="ts">
-import DOMPurify from "dompurify";
-import { marked } from "marked";
-import { computed, onMounted, reactive, ref, watch } from "vue";
-import { useRoute, useRouter } from "vue-router";
-import { agentAPI, projectManagementAPI, workbenchAPI, type MdtodoFileRecord, type MdtodoReportPreviewRecord, type MdtodoTaskDetailRecord, type MdtodoTaskLinkRecord, type MdtodoTaskMutationInput, type MdtodoTaskPage, type MdtodoTaskRecord, type ProjectNavigationResponse, type ProjectSource, type ProjectSourceInput, type ProjectWorkbenchLinkRecord } from "@/api";
-import EmptyState from "@/components/common/EmptyState.vue";
-import LoadingState from "@/components/common/LoadingState.vue";
-import SplitWorkspaceLayout from "@/components/layout/SplitWorkspaceLayout.vue";
-import type { ApiError, ErrorDiagnostic } from "@/types";
-
-const router = useRouter();
-const route = useRoute();
-const loading = ref(false);
-const taskLoading = ref(false);
-const taskDetailLoading = ref(false);
-const linkLoading = ref(false);
-const reportLoading = ref(false);
-const launchLoading = ref(false);
-const taskMutationLoading = ref(false);
-const sourceSaving = ref(false);
-const sourceProbeLoading = ref(false);
-const sourceReindexLoading = ref(false);
-const showInfo = ref(false);
-const showSourceConfig = ref(false);
-const showReportFullscreen = ref(false);
-const showTaskCreateDialog = ref(false);
-const launchError = ref<string | null>(null);
-const taskMutationError = ref<string | null>(null);
-const taskMutationMessage = ref<string | null>(null);
-const taskDetailError = ref<string | null>(null);
-const reportError = ref<string | null>(null);
-const sourceMessage = ref<string | null>(null);
-const sourceError = ref<string | null>(null);
-const error = ref<string | null>(null);
-const apiError = ref<ApiError | null>(null);
-const diagnostic = ref<ErrorDiagnostic | null>(null);
-const navigation = ref<ProjectNavigationResponse | null>(null);
-const sources = ref<ProjectSource[]>([]);
-const files = ref<MdtodoFileRecord[]>([]);
-const tasks = ref<MdtodoTaskRecord[]>([]);
-const taskPage = ref<MdtodoTaskPage | null>(null);
-const links = ref<ProjectWorkbenchLinkRecord[]>([]);
-const taskDetail = ref<MdtodoTaskDetailRecord | null>(null);
-const reportPreview = ref<MdtodoReportPreviewRecord | null>(null);
-const activeReportLink = ref<MdtodoTaskLinkRecord | null>(null);
-const selectedSourceId = ref<string | null>(null);
-const selectedFileRef = ref<string | null>(null);
-const selectedTaskRef = ref<string | null>(null);
-const applyingRouteSelection = ref(false);
-const taskSearch = ref("");
-const taskStatusFilter = ref("all");
-const collapsedTaskRefs = ref<Set<string>>(new Set());
-const taskPaneCollapsed = ref(false);
-const taskPaneWidth = ref(30);
-const reportPaneCollapsed = ref(false);
-const reportPaneWidth = ref(50);
-const editingTitle = ref(false);
-const editingBody = ref(false);
-const editTitle = ref("");
-const editStatus = ref("open");
-const editBody = ref("");
-const newTaskTitle = ref("");
-const newTaskBody = ref("");
-const deleteConfirm = ref(false);
-
-const sourceForm = reactive<ProjectSourceInput>({
-  sourceId: "d601-f103-v2-mdtodo",
-  sourceKind: "hwpod-workspace",
-  displayName: "D601 F103 MDTODO",
-  projectId: "project_hwlab_v03",
-  hwpodId: "d601-f103-v2",
-  nodeId: "node-d601-f103-v2",
-  workspaceRootRef: "",
-  mdtodoRootRef: "docs/MDTODO/",
-  maxFiles: 120
-});
-
-const taskWindowLimit = 200;
-
-const selectedSource = computed(() => sources.value.find((source) => source.sourceId === selectedSourceId.value) ?? null);
-const selectedFile = computed(() => files.value.find((file) => file.fileRef === selectedFileRef.value) ?? null);
-const selectedTask = computed(() => tasks.value.find((task) => task.taskRef === selectedTaskRef.value) ?? null);
-const fileScopedTasks = computed(() => selectedFileRef.value ? tasks.value.filter((task) => task.fileRef === selectedFileRef.value) : tasks.value);
-const filteredTasks = computed(() => {
-  const query = taskSearch.value.trim().toLowerCase();
-  return fileScopedTasks.value.filter((task) => {
-    const statusOk = taskStatusFilter.value === "all" || (task.status || "unknown") === taskStatusFilter.value;
-    if (!statusOk) return false;
-    if (!query) return true;
-    return [task.taskId, task.title, task.taskRef].some((value) => String(value ?? "").toLowerCase().includes(query));
-  });
-});
-const taskStatusCounts = computed(() => fileScopedTasks.value.reduce((acc, task) => {
-  const key = task.status || "unknown";
-  acc[key] = (acc[key] ?? 0) + 1;
-  return acc;
-}, {} as Record<string, number>));
-const taskByRef = computed(() => new Map(filteredTasks.value.map((task) => [task.taskRef, task])));
-const childrenByParent = computed(() => {
-  const map = new Map<string, MdtodoTaskRecord[]>();
-  for (const task of filteredTasks.value) {
-    const parent = task.parentTaskRef && taskByRef.value.has(task.parentTaskRef) ? task.parentTaskRef : "root";
-    const list = map.get(parent) ?? [];
-    list.push(task);
-    map.set(parent, list);
-  }
-  for (const list of map.values()) list.sort((a, b) => (a.ordinal ?? 0) - (b.ordinal ?? 0) || String(a.taskId ?? "").localeCompare(String(b.taskId ?? "")));
-  return map;
-});
-const visibleTaskRows = computed(() => {
-  const rows: MdtodoTaskRecord[] = [];
-  const visit = (task: MdtodoTaskRecord) => {
-    rows.push(task);
-    if (collapsedTaskRefs.value.has(task.taskRef)) return;
-    for (const child of childrenByParent.value.get(task.taskRef) ?? []) visit(child);
-  };
-  for (const task of childrenByParent.value.get("root") ?? []) visit(task);
-  return rows;
-});
-const workbenchLaunchEnabled = computed(() => navigation.value?.navigation?.capabilities?.workbenchLaunch === true);
-const launchButtonDisabled = computed(() => !selectedTask.value || !workbenchLaunchEnabled.value || launchLoading.value);
-const selectedSourceCanReindex = computed(() => Boolean(selectedSourceId.value && !taskLoading.value && !sourceReindexLoading.value));
-const selectedTaskBody = computed(() => taskDetail.value?.body ?? selectedTask.value?.bodyPreview ?? "");
-const selectedTaskLinks = computed(() => taskDetail.value?.links ?? []);
-const selectedTaskBodyHtml = computed(() => markdownToHtml(selectedTaskBody.value));
-const reportPreviewHtml = computed(() => markdownToHtml(reportPreview.value?.content ?? ""));
-const selectedFileName = computed(() => selectedFile.value ? fileDisplayName(selectedFile.value) : selectedTask.value?.fileRef || "-");
-const reportPaneOpen = computed(() => Boolean(reportPreview.value));
-
-onMounted(() => void loadPage());
-
-watch(selectedSourceId, async (sourceId) => {
-  if (!sourceId || loading.value || applyingRouteSelection.value) return;
-  await loadFilesAndTasks(sourceId, { updateRoute: true });
-});
-
-watch(selectedTaskRef, async (taskRef) => {
-  await Promise.all([loadLinks(taskRef), loadTaskDetail(taskRef)]);
-});
-
-watch(() => route.fullPath, async () => {
-  if (loading.value || !sources.value.length) return;
-  await applyRouteSelection();
-});
-
-watch(selectedTask, (task) => resetTaskEditor(task), { immediate: true });
-
-watch(taskDetail, (detail) => {
-  if (detail?.taskRef === selectedTaskRef.value && !editingBody.value) editBody.value = detail.body || "";
-});
-
-async function loadPage(): Promise<void> {
-  loading.value = true;
-  error.value = null;
-  apiError.value = null;
-  diagnostic.value = null;
-  try {
-    const [navigationResponse, sourceResponse] = await Promise.all([projectManagementAPI.navigation(), projectManagementAPI.sources()]);
-    if (!navigationResponse.ok) throw navigationResponse;
-    if (!sourceResponse.ok) throw sourceResponse;
-    navigation.value = navigationResponse.data;
-    sources.value = sourceResponse.data?.sources ?? [];
-    const sourceFromRoute = routeParam("sourceId");
-    selectedSourceId.value = sourceFromRoute && sources.value.some((source) => source.sourceId === sourceFromRoute)
-      ? sourceFromRoute
-      : selectedSourceId.value && sources.value.some((source) => source.sourceId === selectedSourceId.value)
-        ? selectedSourceId.value
-        : sources.value[0]?.sourceId ?? null;
-    if (selectedSourceId.value) await loadFilesAndTasks(selectedSourceId.value, routeSelectionOptions(true));
-    else await loadLinks(null);
-  } catch (err) {
-    setError(err);
-  } finally {
-    loading.value = false;
-  }
-}
-
-async function loadFilesAndTasks(sourceId: string, options: { fileRef?: string | null; taskId?: string | null; reportLinkId?: string | null; updateRoute?: boolean } = {}): Promise<void> {
-  taskLoading.value = true;
-  try {
-    const fileResponse = await projectManagementAPI.files(sourceId);
-    if (!fileResponse.ok) throw fileResponse;
-    files.value = fileResponse.data?.files ?? [];
-    selectedFileRef.value = options.fileRef && files.value.some((file) => file.fileRef === options.fileRef)
-      ? options.fileRef
-      : selectedFileRef.value && files.value.some((file) => file.fileRef === selectedFileRef.value)
-        ? selectedFileRef.value
-        : files.value[0]?.fileRef ?? null;
-    await loadTaskWindow(sourceId, selectedFileRef.value, options.taskId ?? selectedTaskRef.value);
-    if (options.reportLinkId && selectedTaskRef.value) {
-      await Promise.all([loadLinks(selectedTaskRef.value), loadTaskDetail(selectedTaskRef.value)]);
-      await openReportPreviewById(options.reportLinkId, false);
-    } else if (options.updateRoute !== false) {
-      void syncSelectionRoute({ replace: true });
-    }
-  } catch (err) {
-    setError(err);
-  } finally {
-    taskLoading.value = false;
-  }
-}
-
-async function loadLinks(taskRef: string | null): Promise<void> {
-  linkLoading.value = true;
-  try {
-    const response = await projectManagementAPI.workbenchLinks(taskRef ? { taskRef } : {});
-    if (!response.ok) throw response;
-    links.value = response.data?.links ?? [];
-  } catch (err) {
-    setError(err);
-  } finally {
-    linkLoading.value = false;
-  }
-}
-
-async function loadTaskDetail(taskRef: string | null): Promise<void> {
-  taskDetailError.value = null;
-  reportError.value = null;
-  reportPreview.value = null;
-  activeReportLink.value = null;
-  if (!taskRef) {
-    taskDetail.value = null;
-    return;
-  }
-  taskDetailLoading.value = true;
-  try {
-    const response = await projectManagementAPI.taskDetail(taskRef);
-    if (!response.ok) throw response;
-    taskDetail.value = response.data?.detail ?? null;
-  } catch (err) {
-    taskDetail.value = null;
-    taskDetailError.value = projectApiError(err).error;
-  } finally {
-    taskDetailLoading.value = false;
-  }
-}
-
-function onSourceSelect(event: Event): void {
-  selectedSourceId.value = (event.target as HTMLSelectElement).value || null;
-}
-
-function onFileSelect(event: Event): void {
-  void selectFile((event.target as HTMLSelectElement).value);
-}
-
-async function selectFile(fileRef: string): Promise<void> {
-  selectedFileRef.value = fileRef || null;
-  reportPreview.value = null;
-  activeReportLink.value = null;
-  if (!selectedSourceId.value) return;
-  taskLoading.value = true;
-  try {
-    await loadTaskWindow(selectedSourceId.value, selectedFileRef.value, null);
-    void syncSelectionRoute({ replace: false });
-  } catch (err) {
-    setError(err);
-  } finally {
-    taskLoading.value = false;
-  }
-}
-
-function selectTask(taskRef: string): void {
-  selectedTaskRef.value = taskRef;
-  reportPreview.value = null;
-  activeReportLink.value = null;
-  void syncSelectionRoute({ replace: false });
-}
-
-function toggleTask(task: MdtodoTaskRecord): void {
-  const next = new Set(collapsedTaskRefs.value);
-  if (next.has(task.taskRef)) next.delete(task.taskRef);
-  else next.add(task.taskRef);
-  collapsedTaskRefs.value = next;
-}
-
-function hasChildren(task: MdtodoTaskRecord): boolean {
-  return (childrenByParent.value.get(task.taskRef) ?? []).length > 0;
-}
-
-function openTaskCreateDialog(): void {
-  taskMutationError.value = null;
-  taskMutationMessage.value = null;
-  showTaskCreateDialog.value = true;
-}
-
-function openSourceConfig(): void {
-  const source = selectedSource.value;
-  sourceMessage.value = null;
-  sourceError.value = null;
-  Object.assign(sourceForm, {
-    sourceId: source?.sourceKind === "hwpod-workspace" ? source.sourceId : "d601-f103-v2-mdtodo",
-    sourceKind: "hwpod-workspace",
-    displayName: source?.sourceKind === "hwpod-workspace" ? source.displayName : "D601 F103 MDTODO",
-    projectId: source?.projectId || "project_hwlab_v03",
-    hwpodId: source?.hwpodId || "d601-f103-v2",
-    nodeId: source?.nodeId || "node-d601-f103-v2",
-    workspaceRootRef: source?.workspaceRootRef || "",
-    mdtodoRootRef: source?.mdtodoRootRef || "docs/MDTODO/",
-    maxFiles: source?.maxFiles || 120
-  });
-  showSourceConfig.value = true;
-}
-
-async function saveSourceConfig(): Promise<void> {
-  sourceSaving.value = true;
-  sourceMessage.value = null;
-  sourceError.value = null;
-  try {
-    const sourceId = String(sourceForm.sourceId || "").trim();
-    const exists = Boolean(sourceId && sources.value.some((source) => source.sourceId === sourceId));
-    const response = exists ? await projectManagementAPI.updateSource(sourceId, sourceForm) : await projectManagementAPI.createSource(sourceForm);
-    if (!response.ok) throw response;
-    selectedSourceId.value = response.data?.source?.sourceId ?? sourceId;
-    sourceMessage.value = "Source 已保存";
-    await loadPage();
-  } catch (err) {
-    sourceError.value = projectApiError(err).error;
-  } finally {
-    sourceSaving.value = false;
-  }
-}
-
-async function probeSelectedSource(): Promise<void> {
-  const sourceId = selectedSourceId.value || sourceForm.sourceId;
-  if (!sourceId) return;
-  sourceProbeLoading.value = true;
-  sourceMessage.value = null;
-  sourceError.value = null;
-  try {
-    const response = await projectManagementAPI.probeSource(sourceId);
-    if (!response.ok) throw response;
-    sourceMessage.value = `Probe ${response.data?.probe?.status || "ok"}`;
-  } catch (err) {
-    sourceError.value = projectApiError(err).error;
-  } finally {
-    sourceProbeLoading.value = false;
-  }
-}
-
-async function reindexSelectedSource(): Promise<void> {
-  const sourceId = selectedSourceId.value;
-  if (!sourceId) return;
-  sourceReindexLoading.value = true;
-  sourceMessage.value = null;
-  sourceError.value = null;
-  try {
-    const response = await projectManagementAPI.reindexSource(sourceId);
-    if (!response.ok) throw response;
-    sourceMessage.value = `Reindex ${response.data?.projection?.documentCount ?? 0} files / ${response.data?.projection?.taskCount ?? 0} tasks`;
-    await loadFilesAndTasks(sourceId);
-  } catch (err) {
-    sourceError.value = projectApiError(err).error;
-  } finally {
-    sourceReindexLoading.value = false;
-  }
-}
-
-async function saveTaskBasics(): Promise<void> {
-  const task = selectedTask.value;
-  if (!task) return;
-  const input: MdtodoTaskMutationInput = { expectedFingerprint: taskFingerprint() };
-  if (editTitle.value.trim() && editTitle.value.trim() !== (task.title || "")) input.title = editTitle.value.trim();
-  if (editStatus.value && editStatus.value !== (task.status || "open")) input.status = editStatus.value;
-  if (!input.title && !input.status) {
-    taskMutationMessage.value = "任务标题和状态没有变化";
-    taskMutationError.value = null;
-    return;
-  }
-  await runTaskMutation(() => projectManagementAPI.updateTask(task.taskRef, input), task.taskRef, "任务已保存");
-  if (!taskMutationError.value) editingTitle.value = false;
-}
-
-async function saveTaskBody(): Promise<void> {
-  const task = selectedTask.value;
-  if (!task) return;
-  await runTaskMutation(() => projectManagementAPI.updateTask(task.taskRef, { expectedFingerprint: taskFingerprint(), body: editBody.value }), task.taskRef, "正文已保存");
-  if (!taskMutationError.value) editingBody.value = false;
-}
-
-async function createTask(kind: "root" | "subtask" | "continue"): Promise<void> {
-  const title = newTaskTitle.value.trim();
-  if (!title) {
-    taskMutationError.value = "新任务标题不能为空";
-    taskMutationMessage.value = null;
-    return;
-  }
-  const task = selectedTask.value;
-  const input: MdtodoTaskMutationInput = {
-    sourceId: selectedSourceId.value || undefined,
-    fileRef: selectedFileRef.value || undefined,
-    expectedFingerprint: taskFingerprint(),
-    title,
-    body: newTaskBody.value
-  };
-  if (kind === "subtask" && task) input.parentTaskRef = task.taskRef;
-  if (kind === "continue" && task) input.afterTaskRef = task.taskRef;
-  await runTaskMutation(() => projectManagementAPI.createTask(input), undefined, "任务已创建");
-  if (!taskMutationError.value) {
-    newTaskTitle.value = "";
-    newTaskBody.value = "";
-    showTaskCreateDialog.value = false;
-  }
-}
-
-async function deleteSelectedTask(): Promise<void> {
-  const task = selectedTask.value;
-  if (!task) return;
-  if (!deleteConfirm.value) {
-    deleteConfirm.value = true;
-    taskMutationMessage.value = "再次点击确认删除当前任务及子任务";
-    taskMutationError.value = null;
-    return;
-  }
-  await runTaskMutation(() => projectManagementAPI.deleteTask(task.taskRef, { expectedFingerprint: taskFingerprint() }), undefined, "任务已删除");
-  deleteConfirm.value = false;
-}
-
-function beginTitleEdit(): void {
-  if (!selectedTask.value || taskMutationLoading.value) return;
-  editTitle.value = selectedTask.value.title || "";
-  editingTitle.value = true;
-}
-
-function cancelTitleEdit(): void {
-  editTitle.value = selectedTask.value?.title || "";
-  editingTitle.value = false;
-}
-
-function beginBodyEdit(): void {
-  if (!selectedTask.value || taskMutationLoading.value) return;
-  editBody.value = selectedTaskBody.value;
-  editingBody.value = true;
-}
-
-function cancelBodyEdit(): void {
-  editBody.value = selectedTaskBody.value;
-  editingBody.value = false;
-}
-
-async function openReportPreview(link: MdtodoTaskLinkRecord): Promise<void> {
-  const taskRef = selectedTaskRef.value;
-  if (!taskRef || !link.linkId || link.kind !== "markdown-report") return;
-  reportLoading.value = true;
-  reportError.value = null;
-  try {
-    const response = await projectManagementAPI.reportPreview(taskRef, link.linkId);
-    if (!response.ok) throw response;
-    const report = response.data?.report ?? null;
-    if (!report?.content) throw new Error("报告内容未返回");
-    reportPreview.value = report;
-    reportPaneCollapsed.value = false;
-    activeReportLink.value = response.data?.link ?? link;
-    void syncSelectionRoute({ replace: false, reportLinkId: activeReportLink.value?.linkId ?? link.linkId });
-  } catch (err) {
-    reportError.value = projectApiError(err).error;
-  } finally {
-    reportLoading.value = false;
-  }
-}
-
-function closeReportPreview(updateRoute = true): void {
-  reportPreview.value = null;
-  activeReportLink.value = null;
-  showReportFullscreen.value = false;
-  reportPaneCollapsed.value = false;
-  if (updateRoute) void syncSelectionRoute({ replace: false });
-}
-
-async function openReportPreviewById(linkId: string, updateRoute = true): Promise<void> {
-  const target = selectedTaskLinks.value.find((link) => link.linkId === linkId || link.label === linkId || link.relativePath?.includes(linkId) || link.href?.includes(linkId));
-  if (!target) {
-    reportError.value = `报告链接未找到: ${linkId}`;
-    return;
-  }
-  await openReportPreview(target);
-  if (!updateRoute) return;
-  void syncSelectionRoute({ replace: true, reportLinkId: target.linkId });
-}
-
-async function runTaskMutation(action: () => ReturnType<typeof projectManagementAPI.updateTask>, preferredTaskRef: string | undefined, message: string): Promise<void> {
-  const sourceId = selectedSourceId.value;
-  if (!sourceId) return;
-  const expectedFingerprint = taskFingerprint();
-  if (!expectedFingerprint) {
-    taskMutationError.value = "当前文件缺少 revision/fingerprint，不能写入";
-    taskMutationMessage.value = null;
-    return;
-  }
-  taskMutationLoading.value = true;
-  taskMutationError.value = null;
-  taskMutationMessage.value = null;
-  try {
-    const response = await action();
-    if (!response.ok) throw response;
-    const nextTaskRef = response.data?.task?.taskRef || preferredTaskRef;
-    await loadFilesAndTasks(sourceId);
-    if (nextTaskRef && tasks.value.some((task) => task.taskRef === nextTaskRef)) selectedTaskRef.value = nextTaskRef;
-    if (selectedTaskRef.value) await Promise.all([loadLinks(selectedTaskRef.value), loadTaskDetail(selectedTaskRef.value)]);
-    taskMutationMessage.value = message;
-  } catch (err) {
-    taskMutationError.value = projectApiError(err).error;
-  } finally {
-    taskMutationLoading.value = false;
-  }
-}
-
-async function loadTaskWindow(sourceId: string, fileRef: string | null, preferredTaskRef?: string | null): Promise<void> {
-  const taskResponse = await projectManagementAPI.tasks({ sourceId, fileRef, limit: taskWindowLimit });
-  if (!taskResponse.ok) throw taskResponse;
-  tasks.value = taskResponse.data?.tasks ?? [];
-  taskPage.value = taskResponse.data?.page ?? null;
-  const preferredTask = preferredTaskRef ? tasks.value.find((task) => task.taskRef === preferredTaskRef || task.taskId === preferredTaskRef || task.rxxId === preferredTaskRef) : null;
-  selectedTaskRef.value = preferredTask?.taskRef ?? tasks.value[0]?.taskRef ?? null;
-  collapsedTaskRefs.value = new Set();
-  if (!selectedTaskRef.value) await Promise.all([loadLinks(null), loadTaskDetail(null)]);
-}
-
-async function applyRouteSelection(): Promise<void> {
-  const sourceId = routeParam("sourceId");
-  const nextSourceId = sourceId && sources.value.some((source) => source.sourceId === sourceId) ? sourceId : selectedSourceId.value;
-  if (!nextSourceId) return;
-  applyingRouteSelection.value = true;
-  try {
-    selectedSourceId.value = nextSourceId;
-    await loadFilesAndTasks(nextSourceId, routeSelectionOptions(false));
-  } finally {
-    applyingRouteSelection.value = false;
-  }
-}
-
-function routeSelectionOptions(updateRoute: boolean): { fileRef?: string | null; taskId?: string | null; reportLinkId?: string | null; updateRoute: boolean } {
-  return {
-    fileRef: routeParam("fileRef"),
-    taskId: routeParam("taskId"),
-    reportLinkId: routeParam("linkId"),
-    updateRoute
-  };
-}
-
-async function syncSelectionRoute(options: { replace?: boolean; reportLinkId?: string | null } = {}): Promise<void> {
-  const sourceId = selectedSourceId.value;
-  const fileRef = selectedFileRef.value;
-  const task = selectedTask.value;
-  if (!sourceId || !fileRef) return;
-  const name = options.reportLinkId && task ? "ProjectMdtodoReport" : task ? "ProjectMdtodoTask" : "ProjectMdtodoFile";
-  const params: Record<string, string> = { sourceId, fileRef };
-  if (task?.taskId) params.taskId = task.taskId;
-  if (options.reportLinkId) params.linkId = options.reportLinkId;
-  const navigation = { name, params };
-  const resolved = router.resolve(navigation);
-  if (resolved.fullPath === route.fullPath) return;
-  if (options.replace) await router.replace(navigation);
-  else await router.push(navigation);
-}
-
-function routeParam(key: string): string | null {
-  const value = route.params[key];
-  const text = Array.isArray(value) ? value[0] : value;
-  return typeof text === "string" && text.trim() ? text.trim() : null;
-}
-
-function taskFingerprint(): string | undefined {
-  return selectedTask.value?.sourceFingerprint || selectedFile.value?.fingerprint || undefined;
-}
-
-function resetTaskEditor(task: MdtodoTaskRecord | null): void {
-  editingTitle.value = false;
-  editingBody.value = false;
-  editTitle.value = task?.title || "";
-  editStatus.value = task?.status || "open";
-  editBody.value = taskDetail.value?.taskRef === task?.taskRef ? taskDetail.value?.body || "" : "";
-  deleteConfirm.value = false;
-}
-
-async function launchSelectedTask(): Promise<void> {
-  const task = selectedTask.value;
-  if (!task || !task.taskRef || !task.projectId || launchButtonDisabled.value) return;
-  launchLoading.value = true;
-  launchError.value = null;
-  try {
-    const prompt = buildWorkbenchPrompt(task);
-    const launchContext = {
-      source: "mdtodo-page",
-      projectId: task.projectId,
-      taskRef: task.taskRef,
-      sourceId: task.sourceId,
-      fileRef: task.fileRef,
-      fileName: selectedFileName.value,
-      taskId: task.taskId,
-      title: task.title,
-      status: task.status,
-      bodyPreview: selectedTaskBody.value.slice(0, 800),
-      reportLinks: selectedTaskLinks.value.filter((link) => link.kind === "markdown-report").map((link) => ({ linkId: link.linkId, label: link.label, href: link.href, relativePath: link.relativePath }))
-    };
-    const response = await workbenchAPI.launch({
-      projectId: task.projectId,
-      taskRef: task.taskRef,
-      providerProfile: "codex",
-      launchContext
-    });
-    if (!response.ok) throw response;
-    const sessionId = response.data?.sessionId;
-    if (!sessionId) throw new Error("Workbench launch 未返回 sessionId");
-    if (sessionId) {
-      const chat = await agentAPI.sendAgentMessage({
-        message: prompt,
-        prompt,
-        sessionId,
-        providerProfile: "codex",
-        projectId: task.projectId,
-        taskRef: task.taskRef,
-        launchContext
-      }, 120000);
-      if (!chat.ok) throw chat;
-      await waitWorkbenchSessionHasPrompt(sessionId);
-    }
-    await loadLinks(task.taskRef);
-    const target = response.data?.workbenchUrl || `/workbench/sessions/${encodeURIComponent(sessionId)}`;
-    if (target) await router.push(target);
-  } catch (err) {
-    launchError.value = projectApiError(err).error;
-  } finally {
-    launchLoading.value = false;
-  }
-}
-
-async function waitWorkbenchSessionHasPrompt(sessionId: string): Promise<void> {
-  for (let attempt = 0; attempt < 5; attempt += 1) {
-    const response = await workbenchAPI.session(sessionId, 8000);
-    if (response.ok) {
-      const session = response.data?.session as { messageCount?: number; messages?: unknown[]; firstUserMessagePreview?: string | null } | undefined;
-      const count = Number(session?.messageCount ?? (Array.isArray(session?.messages) ? session.messages.length : 0));
-      if (count > 0 || String(session?.firstUserMessagePreview ?? "").trim()) return;
-    }
-    await sleep(800);
-  }
-  throw new Error("Workbench session 已创建但未投影 MDTODO prompt");
-}
-
-function sleep(ms: number): Promise<void> {
-  return new Promise((resolve) => window.setTimeout(resolve, ms));
-}
-
-function setError(err: unknown): void {
-  const context = projectApiError(err);
-  error.value = context.error;
-  apiError.value = context.apiError;
-  diagnostic.value = context.diagnostic;
-}
-
-function projectApiError(err: unknown): { error: string; apiError: ApiError | null; diagnostic: ErrorDiagnostic | null } {
-  if (err && typeof err === "object" && "error" in err) {
-    const result = err as { error?: string | null; apiError?: ApiError | null; diagnostic?: ErrorDiagnostic | null; status?: number };
-    return { error: result.error || `HTTP ${result.status ?? "unknown"}`, apiError: result.apiError ?? null, diagnostic: result.diagnostic ?? null };
-  }
-  return { error: err instanceof Error ? err.message : String(err || "MDTODO 加载失败"), apiError: null, diagnostic: null };
-}
-
-function buildWorkbenchPrompt(task: MdtodoTaskRecord): string {
-  const reportLines = selectedTaskLinks.value
-    .filter((link) => link.kind === "markdown-report")
-    .map((link) => `- ${link.label || link.href}: ${link.relativePath || link.href}`)
-    .join("\n");
-  return [
-    "请基于以下 MDTODO 任务开始工作，先读取相关文件和报告，再给出下一步执行结果。",
-    "",
-    `Task: ${task.taskId || task.taskRef} ${task.title || ""}`.trim(),
-    `TaskRef: ${task.taskRef}`,
-    `File: ${selectedFile.value?.relativePath || task.fileRef || "-"}`,
-    `Status: ${task.status || "open"}`,
-    "",
-    "任务正文:",
-    selectedTaskBody.value.trim() || "(无正文)",
-    "",
-    "相关报告链接:",
-    reportLines || "(无)"
-  ].join("\n");
-}
-
-function markdownToHtml(value?: string | null): string {
-  const text = String(value ?? "").trim();
-  if (!text) return "";
-  return DOMPurify.sanitize(marked.parse(text, { async: false }) as string);
-}
-
-function fileDisplayName(file: MdtodoFileRecord): string {
-  const path = file.relativePath || file.fileRef || "-";
-  return path.split("/").filter(Boolean).at(-1) || path;
-}
-
-function statusLabel(value?: string | null): string {
-  if (value === "done") return "完成";
-  if (value === "blocked") return "阻塞";
-  if (value === "in_progress") return "进行中";
-  if (value === "open") return "待办";
-  return value || "未知";
-}
-
-function sourceStatusTone(value?: string | null): string {
-  if (value === "active" || value === "ok" || value === "ready") return "ok";
-  if (value === "blocked" || value === "error" || value === "failed") return "error";
-  return "pending";
-}
-
-function taskIndent(task: MdtodoTaskRecord): Record<string, string> {
-  return { paddingInlineStart: `${12 + Math.max(0, task.depth ?? 0) * 22}px` };
-}
-
-function shortRef(value?: string | null): string {
-  if (!value) return "-";
-  return value.length > 42 ? `${value.slice(0, 24)}...${value.slice(-10)}` : value;
-}
-
-function displayDate(value?: string | null): string {
-  if (!value) return "-";
-  const date = new Date(value);
-  if (Number.isNaN(date.getTime())) return value;
-  return date.toLocaleString("zh-CN", { month: "2-digit", day: "2-digit", hour: "2-digit", minute: "2-digit" });
-}
+import MdtodoPageShell from "@/components/mdtodo/MdtodoPageShell.vue";
 </script>
 
 <template>
-  <section class="route-stack mdtodo-page" data-testid="project-management-mdtodo">
-    <header class="mdtodo-compact-header">
-      <div>
-        <span>Project Management</span>
-        <h1>MDTODO</h1>
-      </div>
-      <p>{{ selectedFileName }}<small v-if="selectedTask"> / {{ selectedTask.taskId }}</small></p>
-    </header>
-    <LoadingState v-if="loading && !sources.length" label="加载 MDTODO source" />
-    <section v-else-if="error" class="data-panel mdtodo-error" data-testid="project-management-error">
-      <EmptyState title="MDTODO 加载失败" :description="error" :api-error="apiError" :diagnostic="diagnostic" action-label="重试" @action="loadPage" />
-    </section>
-    <template v-else>
-      <section class="mdtodo-toolbar" data-testid="mdtodo-toolbar" aria-label="MDTODO controls">
-        <label class="toolbar-field" data-testid="mdtodo-source-list">
-          <span>Source</span>
-          <select data-testid="mdtodo-source-select" :value="selectedSourceId || ''" @change="onSourceSelect">
-            <option v-for="source in sources" :key="source.sourceId" :value="source.sourceId">{{ source.displayName || source.sourceId }}</option>
-          </select>
-        </label>
-        <label class="toolbar-field" data-testid="mdtodo-file-control">
-          <span>File</span>
-          <select data-testid="mdtodo-file-select" :value="selectedFileRef || ''" :disabled="taskLoading || !files.length" @change="onFileSelect">
-            <option v-for="file in files" :key="file.fileRef" :value="file.fileRef">{{ fileDisplayName(file) }}</option>
-          </select>
-        </label>
-        <div class="toolbar-actions">
-          <button class="icon-button" type="button" data-testid="mdtodo-source-config-open" aria-label="配置 Source" @click="openSourceConfig">⚙</button>
-          <button class="icon-button" type="button" data-testid="mdtodo-source-reindex" aria-label="重建索引" :disabled="!selectedSourceCanReindex" @click="reindexSelectedSource">↻</button>
-          <button class="icon-button" type="button" data-testid="mdtodo-info-open" aria-label="查看摘要" @click="showInfo = true">?</button>
-        </div>
-      </section>
-
-      <p v-if="sourceMessage" class="source-message" data-testid="mdtodo-source-message">{{ sourceMessage }}</p>
-      <p v-if="sourceError" class="source-error" data-testid="mdtodo-source-error">{{ sourceError }}</p>
-
-      <SplitWorkspaceLayout
-        v-model:left-width="taskPaneWidth"
-        v-model:right-width="reportPaneWidth"
-        class="mdtodo-workspace"
-        :left-collapsed="taskPaneCollapsed"
-        :right-open="reportPaneOpen"
-        :right-collapsed="reportPaneCollapsed"
-        left-resizer-test-id="mdtodo-task-pane-resizer"
-        right-resizer-test-id="mdtodo-report-pane-resizer"
-        aria-label="MDTODO 工作区"
-      >
-        <template #left>
-        <section class="data-panel mdtodo-task-panel" data-testid="mdtodo-task-tree" :data-collapsed="taskPaneCollapsed">
-          <header class="mdtodo-panel-header">
-            <div><h2>{{ taskPaneCollapsed ? '纲' : '任务树' }}</h2><p v-if="!taskPaneCollapsed">{{ filteredTasks.length }} / {{ taskPage?.total ?? fileScopedTasks.length }} tasks<span v-if="taskPage?.hasMore"> · window {{ taskPage.limit }}</span></p></div>
-            <div class="task-pane-actions">
-              <button class="icon-button" type="button" data-testid="mdtodo-new-task-open" aria-label="新建任务" :disabled="!selectedFileRef || taskMutationLoading" @click="openTaskCreateDialog">+</button>
-              <button class="icon-button" type="button" data-testid="mdtodo-task-pane-toggle" :aria-label="taskPaneCollapsed ? '展开任务树' : '收起任务树'" @click="taskPaneCollapsed = !taskPaneCollapsed">{{ taskPaneCollapsed ? '›' : '‹' }}</button>
-            </div>
-            <div v-if="!taskPaneCollapsed" class="task-tools">
-              <input v-model="taskSearch" data-testid="mdtodo-task-search" type="search" placeholder="R1 / title" aria-label="搜索任务" />
-              <select v-model="taskStatusFilter" data-testid="mdtodo-task-status-filter" aria-label="筛选状态">
-                <option value="all">全部</option>
-                <option value="open">待办</option>
-                <option value="in_progress">进行中</option>
-                <option value="done">完成</option>
-                <option value="blocked">阻塞</option>
-              </select>
-            </div>
-          </header>
-          <template v-if="!taskPaneCollapsed">
-          <LoadingState v-if="taskLoading" compact label="同步文件和任务" />
-          <EmptyState v-else-if="!visibleTaskRows.length" title="暂无任务" description="当前文件没有任务投影。" />
-          <div v-else class="task-tree" role="tree" aria-label="MDTODO task tree">
-            <div v-for="task in visibleTaskRows" :key="task.taskRef" class="task-row-shell" :style="taskIndent(task)">
-              <button class="task-toggle" type="button" :aria-label="collapsedTaskRefs.has(task.taskRef) ? '展开任务' : '折叠任务'" :disabled="!hasChildren(task)" @click.stop="toggleTask(task)">{{ hasChildren(task) ? (collapsedTaskRefs.has(task.taskRef) ? '+' : '-') : '' }}</button>
-              <button class="task-row" role="treeitem" type="button" :data-selected="task.taskRef === selectedTaskRef" :data-task-ref="task.taskRef" :data-task-id="task.taskId" :data-task-status="task.status || 'unknown'" @click="selectTask(task.taskRef)">
-                <span class="task-id">{{ task.taskId || 'R?' }}</span>
-                <strong>{{ task.title || task.taskId || 'Untitled task' }}</strong>
-                <span class="task-status" :data-status="task.status || 'unknown'">{{ statusLabel(task.status) }}</span>
-              </button>
-            </div>
-          </div>
-          </template>
-        </section>
-        </template>
-
-        <section class="data-panel mdtodo-detail-panel" data-testid="mdtodo-task-detail">
-          <header class="mdtodo-detail-header">
-            <div class="task-title-block">
-              <span class="task-id-large">{{ selectedTask?.taskId || 'R?' }}</span>
-              <div v-if="selectedTask && editingTitle" class="inline-editor">
-                <input v-model="editTitle" data-testid="mdtodo-edit-title" :disabled="taskMutationLoading" @keyup.enter="saveTaskBasics" @keyup.esc="cancelTitleEdit" />
-                <button class="btn btn-secondary" type="button" data-testid="mdtodo-edit-save" :disabled="taskMutationLoading" @click="saveTaskBasics">保存</button>
-                <button class="btn btn-secondary" type="button" :disabled="taskMutationLoading" @click="cancelTitleEdit">取消</button>
-              </div>
-              <button v-else-if="selectedTask" class="task-title-read" type="button" data-testid="mdtodo-title-read" @dblclick="beginTitleEdit">{{ selectedTask.title || selectedTask.taskId }}</button>
-              <strong v-else>未选择任务</strong>
-            </div>
-            <div v-if="selectedTask" class="detail-toolbar">
-              <select v-model="editStatus" data-testid="mdtodo-edit-status" :disabled="taskMutationLoading" aria-label="任务状态">
-                <option value="open">待办</option>
-                <option value="in_progress">进行中</option>
-                <option value="done">完成</option>
-                <option value="blocked">阻塞</option>
-              </select>
-              <button class="btn btn-secondary" type="button" data-testid="mdtodo-status-save" :disabled="taskMutationLoading" @click="saveTaskBasics">保存状态</button>
-              <button class="btn btn-primary" type="button" data-testid="mdtodo-workbench-launch" :disabled="launchButtonDisabled" :aria-disabled="launchButtonDisabled" @click="launchSelectedTask">
-                {{ launchLoading ? '启动中' : '在 Workbench 执行' }}
-              </button>
-            </div>
-          </header>
-          <EmptyState v-if="!selectedTask" title="未选择任务" description="选择任务后显示 taskRef、状态、文件和 Workbench link 摘要。" />
-          <template v-else>
-            <section class="task-detail-content">
-              <section class="task-editor" data-testid="mdtodo-task-editor">
-                <LoadingState v-if="taskDetailLoading" compact label="同步任务详情" />
-                <p v-if="taskDetailError" class="source-error" data-testid="mdtodo-task-detail-error">{{ taskDetailError }}</p>
-                <section class="task-body-section" data-testid="mdtodo-task-body">
-                  <header><strong>正文</strong><small>双击编辑</small></header>
-                  <div v-if="editingBody" class="inline-body-editor">
-                    <textarea v-model="editBody" data-testid="mdtodo-edit-body" :disabled="taskMutationLoading" rows="14" />
-                    <div class="editor-actions">
-                      <button class="btn btn-secondary" type="button" data-testid="mdtodo-edit-body-save" :disabled="taskMutationLoading" @click="saveTaskBody">保存正文</button>
-                      <button class="btn btn-secondary" type="button" :disabled="taskMutationLoading" @click="cancelBodyEdit">取消</button>
-                    </div>
-                  </div>
-                  <article v-else class="markdown-body task-body-rendered" data-testid="mdtodo-body-rendered" @dblclick="beginBodyEdit">
-                    <div v-if="selectedTaskBodyHtml" v-html="selectedTaskBodyHtml" />
-                    <p v-else class="empty-inline">暂无正文</p>
-                  </article>
-                </section>
-                <div class="editor-actions danger-actions">
-                  <button class="btn btn-secondary" type="button" data-testid="mdtodo-delete-task" :disabled="taskMutationLoading" @click="deleteSelectedTask">{{ deleteConfirm ? '确认删除' : '删除任务' }}</button>
-                  <button v-if="deleteConfirm" class="btn btn-secondary" type="button" data-testid="mdtodo-delete-cancel" :disabled="taskMutationLoading" @click="deleteConfirm = false">取消</button>
-                </div>
-                <p v-if="taskMutationMessage" class="source-message" data-testid="mdtodo-task-mutation-message">{{ taskMutationMessage }}</p>
-                <p v-if="taskMutationError" class="source-error" data-testid="mdtodo-task-mutation-error">{{ taskMutationError }}</p>
-              </section>
-
-              <section class="report-link-section" data-testid="mdtodo-report-section">
-                <header><strong>报告</strong><span v-if="reportLoading">加载中</span></header>
-                <div v-if="selectedTaskLinks.length" class="report-link-list">
-                  <button v-for="link in selectedTaskLinks" :key="link.linkId" class="report-link-button" type="button" data-testid="mdtodo-report-link" :disabled="link.kind !== 'markdown-report' || reportLoading" @click="openReportPreview(link)">
-                    <span>{{ link.label || link.href }}</span>
-                    <small>{{ link.relativePath || link.kind }}</small>
-                  </button>
-                </div>
-                <p v-else class="empty-inline">暂无报告链接</p>
-                <p v-if="reportError" class="source-error" data-testid="mdtodo-report-error">{{ reportError }}</p>
-              </section>
-            </section>
-            <p class="launch-blocker" data-testid="mdtodo-workbench-launch-blocker">{{ workbenchLaunchEnabled ? 'Workbench Launch API ready' : 'Workbench Launch capability unavailable' }}</p>
-            <p v-if="launchError" class="launch-blocker" data-testid="mdtodo-workbench-launch-error">{{ launchError }}</p>
-            <section class="task-links" data-testid="mdtodo-workbench-link-summary">
-              <header><strong>Workbench Links</strong><span v-if="linkLoading">同步中</span></header>
-              <ul v-if="links.length">
-                <li v-for="link in links" :key="link.linkId"><strong>{{ link.sessionId || link.linkId }}</strong><small>{{ shortRef(link.traceId || link.taskRef || link.projectId) }}</small></li>
-              </ul>
-              <p v-else>暂无关联 session。</p>
-            </section>
-          </template>
-        </section>
-
-        <template #right>
-          <aside v-if="reportPreview" class="data-panel report-sidebar" data-testid="mdtodo-report-sidebar" :data-collapsed="reportPaneCollapsed">
-            <header class="report-sidebar-header">
-              <button class="icon-button" type="button" data-testid="mdtodo-report-sidebar-toggle" :aria-label="reportPaneCollapsed ? '展开报告侧栏' : '收起报告侧栏'" @click="reportPaneCollapsed = !reportPaneCollapsed">{{ reportPaneCollapsed ? '‹' : '›' }}</button>
-              <strong v-if="!reportPaneCollapsed">{{ activeReportLink?.label || reportPreview.relativePath || 'Report' }}</strong>
-              <div v-if="!reportPaneCollapsed" class="report-sidebar-actions">
-                <button class="btn btn-secondary" type="button" data-testid="mdtodo-report-fullscreen" @click="showReportFullscreen = true">全屏</button>
-                <button class="icon-button" type="button" aria-label="关闭报告预览" data-testid="mdtodo-report-close" @click="closeReportPreview()">×</button>
-              </div>
-            </header>
-            <article v-if="!reportPaneCollapsed" class="report-preview" data-testid="mdtodo-report-preview">
-              <div class="markdown-body" v-html="reportPreviewHtml" />
-            </article>
-          </aside>
-        </template>
-      </SplitWorkspaceLayout>
-    </template>
-
-    <div v-if="showInfo" class="modal-backdrop" data-testid="mdtodo-info-popover" role="dialog" aria-modal="true" aria-label="MDTODO 摘要" @click.self="showInfo = false">
-      <section class="mdtodo-dialog mdtodo-info-dialog">
-        <header><h2>MDTODO 摘要</h2><button class="icon-button" type="button" aria-label="关闭摘要" @click="showInfo = false">×</button></header>
-        <dl class="summary-list">
-          <div><dt>Source</dt><dd>{{ sources.length }} / {{ selectedSource?.displayName || selectedSourceId || '-' }}</dd></div>
-          <div><dt>Source ID</dt><dd><code>{{ selectedSourceId || '-' }}</code></dd></div>
-          <div><dt>File</dt><dd>{{ selectedFile?.relativePath || selectedFileName }}</dd></div>
-          <div><dt>File Ref</dt><dd><code>{{ selectedFileRef || '-' }}</code></dd></div>
-          <div><dt>Title</dt><dd>{{ selectedTask?.title || '-' }}</dd></div>
-          <div><dt>TaskRef</dt><dd><code>{{ selectedTask?.taskRef || '-' }}</code></dd></div>
-          <div><dt>Updated</dt><dd>{{ displayDate(selectedTask?.updatedAt) }}</dd></div>
-          <div><dt>Tasks</dt><dd>open {{ taskStatusCounts.open || 0 }} / progress {{ taskStatusCounts.in_progress || 0 }} / done {{ taskStatusCounts.done || 0 }}</dd></div>
-          <div><dt>Links</dt><dd>{{ links.length }} / {{ workbenchLaunchEnabled ? 'launch enabled' : 'launch unavailable' }}</dd></div>
-        </dl>
-      </section>
-    </div>
-
-    <div v-if="showTaskCreateDialog" class="modal-backdrop" data-testid="mdtodo-task-create-dialog" role="dialog" aria-modal="true" aria-label="新建 MDTODO 任务" @click.self="showTaskCreateDialog = false">
-      <section class="mdtodo-dialog task-create-dialog">
-        <header><h2>新建任务</h2><button class="icon-button" type="button" aria-label="关闭新建任务" @click="showTaskCreateDialog = false">×</button></header>
-        <div class="task-create-box">
-          <label><span>New task</span><input v-model="newTaskTitle" data-testid="mdtodo-new-title" :disabled="taskMutationLoading" placeholder="新任务标题" /></label>
-          <textarea v-model="newTaskBody" data-testid="mdtodo-new-body" :disabled="taskMutationLoading" rows="5" placeholder="新任务正文，可留空。" />
-          <div class="editor-actions">
-            <button class="btn btn-secondary" type="button" data-testid="mdtodo-add-root" :disabled="taskMutationLoading" @click="createTask('root')">新增根任务</button>
-            <button class="btn btn-secondary" type="button" data-testid="mdtodo-add-subtask" :disabled="taskMutationLoading || !selectedTask" @click="createTask('subtask')">新增子任务</button>
-            <button class="btn btn-secondary" type="button" data-testid="mdtodo-continue-task" :disabled="taskMutationLoading || !selectedTask" @click="createTask('continue')">延续同级</button>
-          </div>
-          <p v-if="taskMutationError" class="source-error" data-testid="mdtodo-task-mutation-error">{{ taskMutationError }}</p>
-        </div>
-      </section>
-    </div>
-
-    <div v-if="showReportFullscreen && reportPreview" class="modal-backdrop" data-testid="mdtodo-report-fullscreen-dialog" role="dialog" aria-modal="true" aria-label="报告预览" @click.self="showReportFullscreen = false">
-      <section class="mdtodo-dialog report-fullscreen-dialog">
-        <header><h2>{{ activeReportLink?.label || reportPreview.relativePath || 'Report' }}</h2><button class="icon-button" type="button" aria-label="关闭报告" @click="showReportFullscreen = false">×</button></header>
-        <article class="markdown-body report-fullscreen-body" v-html="reportPreviewHtml" />
-      </section>
-    </div>
-
-    <div v-if="showSourceConfig" class="modal-backdrop" data-testid="mdtodo-source-config-dialog" role="dialog" aria-modal="true" aria-label="配置 MDTODO Source" @click.self="showSourceConfig = false">
-      <section class="mdtodo-dialog source-config-dialog">
-        <header><h2>Source 配置</h2><button class="icon-button" type="button" aria-label="关闭配置" @click="showSourceConfig = false">×</button></header>
-        <form class="source-form" @submit.prevent="saveSourceConfig">
-          <label><span>Source ID</span><input v-model="sourceForm.sourceId" data-testid="mdtodo-source-form-id" required /></label>
-          <label><span>Display Name</span><input v-model="sourceForm.displayName" data-testid="mdtodo-source-form-name" required /></label>
-          <label><span>HWPOD ID</span><input v-model="sourceForm.hwpodId" data-testid="mdtodo-source-form-hwpod" required /></label>
-          <label><span>Node ID</span><input v-model="sourceForm.nodeId" data-testid="mdtodo-source-form-node" required /></label>
-          <label><span>Workspace Root</span><input v-model="sourceForm.workspaceRootRef" data-testid="mdtodo-source-form-workspace" /></label>
-          <label><span>MDTODO Root</span><input v-model="sourceForm.mdtodoRootRef" data-testid="mdtodo-source-form-root" required /></label>
-          <label><span>Max Files</span><input v-model.number="sourceForm.maxFiles" data-testid="mdtodo-source-form-max-files" type="number" min="1" max="500" /></label>
-          <footer>
-            <button class="btn btn-primary" data-testid="mdtodo-source-save" type="submit" :disabled="sourceSaving">{{ sourceSaving ? '保存中' : '保存' }}</button>
-            <button class="btn btn-secondary" data-testid="mdtodo-source-probe" type="button" :disabled="sourceProbeLoading" @click="probeSelectedSource">{{ sourceProbeLoading ? 'Probe...' : 'Probe' }}</button>
-            <button class="btn btn-secondary" data-testid="mdtodo-source-reindex-dialog" type="button" :disabled="sourceReindexLoading" @click="reindexSelectedSource">{{ sourceReindexLoading ? 'Reindex...' : 'Reindex' }}</button>
-          </footer>
-          <p v-if="sourceMessage" class="source-message">{{ sourceMessage }}</p>
-          <p v-if="sourceError" class="source-error">{{ sourceError }}</p>
-        </form>
-      </section>
-    </div>
-  </section>
+  <MdtodoPageShell />
 </template>
-
-<style scoped>
-.mdtodo-page { display: grid; height: calc(100dvh - 68px); max-height: calc(100dvh - 68px); min-width: 0; min-height: 0; grid-template-rows: auto auto auto minmax(0, 1fr); gap: 10px; overflow: hidden; }
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-.report-link-button span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 800; }
-.report-link-button small { color: #64706b; overflow-wrap: anywhere; }
-.report-sidebar { height: 100%; grid-template-rows: auto minmax(0, 1fr); border: 1px solid #d8e2df; border-radius: 8px; background: #fff; padding: 10px; overflow: hidden; }
-.report-sidebar[data-collapsed="true"] { justify-items: center; padding: 8px 4px; }
-.report-sidebar-header { display: flex; min-width: 0; align-items: center; justify-content: space-between; gap: 8px; color: #14211d; font-size: 13px; }
-.report-sidebar-header strong { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
-.report-sidebar-actions { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 6px; }
-.report-preview { display: grid; min-height: 0; gap: 8px; border-top: 1px solid #e2ece8; padding-top: 8px; overflow: hidden; }
-.report-preview > .markdown-body { min-height: 0; overflow: auto; }
-.task-create-box { display: grid; gap: 8px; border-top: 1px solid #e2ece8; padding-top: 10px; }
-.editor-actions { display: flex; flex-wrap: wrap; gap: 8px; }
-.danger-actions { border-top: 1px solid #e2ece8; padding-top: 10px; }
-.danger-actions .btn { border-color: #fecaca; color: #991b1b; }
-.launch-blocker { margin: 0; color: #64706b; font-size: 12px; }
-.task-links { display: grid; gap: 8px; border-top: 1px solid #e2e8f0; padding-top: 10px; }
-.task-links header { display: flex; justify-content: space-between; gap: 10px; color: #14211d; font-size: 13px; }
-.task-links ul { display: grid; gap: 6px; margin: 0; padding: 0; list-style: none; }
-.task-links li { display: grid; gap: 3px; border: 1px solid #d8e2df; border-radius: 6px; padding: 8px; }
-.task-links small { color: #64706b; overflow-wrap: anywhere; }
-.modal-backdrop { position: fixed; z-index: 60; inset: 0; display: grid; place-items: start center; overflow: auto; background: rgba(15, 23, 42, 0.38); padding: 8dvh 16px 32px; }
-.mdtodo-dialog { display: grid; width: min(720px, calc(100vw - 32px)); gap: 14px; border: 1px solid #cbd8d2; border-radius: 8px; background: #fff; color: #14211d; padding: 16px; box-shadow: 0 24px 60px rgba(15, 23, 42, 0.22); }
-.mdtodo-dialog header { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
-.mdtodo-dialog h2 { margin: 0; font-size: 18px; }
-.task-create-dialog { width: min(620px, calc(100vw - 32px)); }
-.task-create-dialog textarea { width: 100%; min-width: 0; border: 1px solid #cbd8d4; border-radius: 6px; background: #fff; color: #14211d; font: inherit; line-height: 1.4; padding: 8px 9px; resize: vertical; }
-.report-fullscreen-dialog { width: min(1180px, calc(100vw - 48px)); height: min(820px, calc(100dvh - 64px)); max-height: calc(100dvh - 64px); grid-template-rows: auto minmax(0, 1fr); align-content: stretch; overflow: hidden; }
-.report-fullscreen-body { min-height: 0; height: 100%; overflow: auto; border: 1px solid #e2e8f0; border-radius: 6px; padding: 14px; }
-.source-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
-.source-form label { display: grid; min-width: 0; gap: 5px; color: #52615c; font-size: 12px; font-weight: 800; }
-.source-form footer { display: flex; grid-column: 1 / -1; flex-wrap: wrap; gap: 8px; }
-.source-form .source-message,
-.source-form .source-error { grid-column: 1 / -1; }
-@media (max-width: 980px) {
-  .mdtodo-toolbar,
-  .mdtodo-workspace { min-width: 0; }
-  .toolbar-actions { justify-content: flex-start; }
-  .task-tools { width: 100%; grid-template-columns: 1fr; }
-  .mdtodo-page { height: calc(100dvh - 68px); max-height: calc(100dvh - 68px); overflow: hidden; }
-  .mdtodo-workspace { min-height: 0; height: 100%; }
-  .mdtodo-task-panel[data-collapsed="true"] { justify-items: stretch; }
-  .task-detail-content { grid-template-columns: 1fr; }
-  .report-sidebar { min-height: 0; }
-}
-@media (max-width: 640px) {
-  .source-form { grid-template-columns: 1fr; }
-  .editor-grid { grid-template-columns: 1fr; }
-  .inline-editor,
-  .status-inline { grid-template-columns: 1fr; }
-  .mdtodo-compact-header,
-  .mdtodo-detail-header { align-items: stretch; flex-direction: column; }
-  .detail-toolbar { justify-content: flex-start; }
-  .task-title-block { grid-template-columns: 1fr; }
-  .task-row { grid-template-columns: minmax(48px, auto) minmax(0, 1fr); }
-  .task-status { grid-column: 1 / -1; }
-}
-</style>