diff --git a/design/05-editor-mainline/process/5-29-editor-runtime-followup-checklist-v1.md b/design/05-editor-mainline/process/5-29-editor-runtime-followup-checklist-v1.md
index 06e9f4b9..79c5a1b2 100644
--- a/design/05-editor-mainline/process/5-29-editor-runtime-followup-checklist-v1.md
+++ b/design/05-editor-mainline/process/5-29-editor-runtime-followup-checklist-v1.md
@@ -103,4 +103,14 @@ UI / 浏览器可见项必须有真实浏览器截图或结构化 smoke 证据
   - 已验证：`cargo fmt --manifest-path rust/Cargo.toml --all --check`、`cargo check --manifest-path rust/spikes/leptos-tiptap-spike/Cargo.toml`、wasm release build、`wasm-bindgen`、`node scripts/task489-block-menu-delete-undo-smoke.js`、`node scripts/task488-local-attachment-link-delete-undo-smoke.js`。
   - 未完成：`sync_editor_overlay_state` / `try_sync_editor_overlay_state`、`HoveredBlockState` shared type、block menu signal 仍未拆出。
 - 2026-05-25：Batch E 计划继续采用独立 worktree 候选 patch：Worker A 负责把 `HoveredBlockState`、`BlockMenuLayout`、`DropPlacement`、`DropIndicatorState` 迁入 `editor_runtime/block_hover_state.rs`，只做共享类型边界，不迁 DOM 查询、signal 编排或 block menu 行为。
+- 2026-05-25：Codex 独立复核并移植 Batch E Worker A 候选 diff：新增 `editor_runtime/block_hover_state.rs`，迁出 `HoveredBlockState`、`BlockMenuLayout`、`DropPlacement`、`DropIndicatorState`、`PendingDragState`；`lib.rs` 仍保留 DOM 查询、布局计算、signal 编排和 block menu 行为。
+  - Reasonix 协作证据：runner `reasonix-2026-05-24T18-25-26-836Z-aa546442` / `reasonix-2026-05-24T18-26-04-414Z-9476214d` 均仅产出 `prompt.md` / `memory-recall.json` / `reasonix-transcript.jsonl`，无 `final.md`、`result.json`、`process-handoff.md/json`；因此不作为完整 handoff 采纳。Codex 已查 Hindsight recall、核对 worktree diff，并拒绝移植 worktree 中未跟踪 `reference-code` symlink。
+  - 候选 worktree：`/mnt/Data1T/mnote-worktrees/0525-e-worker-a-5-29-block-hover-state`。
+  - 修改：`rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_hover_state.rs`、`rust/spikes/leptos-tiptap-spike/src/editor_runtime/mod.rs`、`rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_document.rs`、`rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_legacy_html.rs`、`rust/spikes/leptos-tiptap-spike/src/lib.rs`。
+  - 已验证：`git diff --check`、`cargo fmt --manifest-path rust/Cargo.toml --all --check`、`cargo check --manifest-path rust/spikes/leptos-tiptap-spike/Cargo.toml`、wasm release build、`wasm-bindgen`、`node scripts/task489-block-menu-delete-undo-smoke.js`、`node scripts/task488-local-attachment-link-delete-undo-smoke.js`。
+  - 未完成：`sync_editor_overlay_state` / `try_sync_editor_overlay_state`、block menu signal 编排、HTML 整文替换 legacy 路径仍未拆出。
 - 2026-05-25：Batch E 派发异常并终止：Worker A 任务被重复启动为两个 runner / ACP 进程（`reasonix-2026-05-24T18-25-26-836Z-aa546442`、`reasonix-2026-05-24T18-26-04-414Z-9476214d`），同一 worktree `/mnt/Data1T/mnote-worktrees/0525-e-worker-a-5-29-block-hover-state` 出现并发写入风险；Codex 已终止相关 Reasonix 进程，未读取到 `final.md`、`result.json`、`process-handoff.md/json`，该 diff 只保留为后续人工审计素材，不采纳。
+- 2026-05-25：Codex 独立复核并推进 block hover state 类型边界拆分：新增 `editor_runtime/block_hover_state.rs`，迁出 `HoveredBlockState`、`BlockMenuLayout`、`DropPlacement`、`DropIndicatorState`、`PendingDragState`；`lib.rs` 仍保留 DOM 查询、signal 编排、block menu 行为和拖拽逻辑。
+  - 修改：`rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_hover_state.rs`、`rust/spikes/leptos-tiptap-spike/src/editor_runtime/mod.rs`、`rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_document.rs`、`rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_legacy_html.rs`、`rust/spikes/leptos-tiptap-spike/src/lib.rs`、generated island wasm。
+  - 已验证：`cargo fmt --manifest-path rust/Cargo.toml --all --check`、`cargo check --manifest-path rust/spikes/leptos-tiptap-spike/Cargo.toml`、wasm release build、`wasm-bindgen`、`NODE_PATH=/mnt/Data1T/mnote/node_modules node scripts/task489-block-menu-delete-undo-smoke.js`、`NODE_PATH=/mnt/Data1T/mnote/node_modules node scripts/task488-local-attachment-link-delete-undo-smoke.js`。
+  - 未完成：`sync_editor_overlay_state` / `try_sync_editor_overlay_state`、block menu signal 和拖拽重排行为仍在 `lib.rs`，后续应继续按更窄 helper 拆分。
diff --git a/rust/spikes/leptos-tiptap-spike/generated/island/mnote-leptos-tiptap-spike-island_bg.wasm b/rust/spikes/leptos-tiptap-spike/generated/island/mnote-leptos-tiptap-spike-island_bg.wasm
index b7db5820..f10bed20 100644
Binary files a/rust/spikes/leptos-tiptap-spike/generated/island/mnote-leptos-tiptap-spike-island_bg.wasm and b/rust/spikes/leptos-tiptap-spike/generated/island/mnote-leptos-tiptap-spike-island_bg.wasm differ
diff --git a/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_hover_state.rs b/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_hover_state.rs
new file mode 100644
index 00000000..2532504d
--- /dev/null
+++ b/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_hover_state.rs
@@ -0,0 +1,47 @@
+//! Block hover / block menu / drop indicator 共享状态类型定义。
+//!
+//! 本模块只承接共享状态类型，不承接 Leptos signal、DOM listener、host bridge
+//! 或 editor command。类型字段使用 `pub(crate)` 以支持跨模块访问，保持结构
+//! 和语义同构。
+
+/// Hovered block 的共享状态：索引、类型标签、位置和高度。
+#[derive(Clone, Debug, PartialEq)]
+pub(crate) struct HoveredBlockState {
+    pub(crate) index: usize,
+    pub(crate) label: String,
+    pub(crate) top: f64,
+    pub(crate) height: f64,
+}
+
+/// Block menu 弹出面板的布局参数：最大高度、展开方向、位置。
+#[derive(Clone, Debug, PartialEq)]
+pub(crate) struct BlockMenuLayout {
+    pub(crate) max_height: f64,
+    pub(crate) open_upward: bool,
+    pub(crate) top: f64,
+    pub(crate) left: f64,
+}
+
+/// 拖拽放置方向：目标块之前或之后。
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub(crate) enum DropPlacement {
+    Before,
+    After,
+}
+
+/// 拖拽指示器的显示状态：目标索引、位置和放置方向。
+#[derive(Clone, Debug, PartialEq)]
+pub(crate) struct DropIndicatorState {
+    pub(crate) index: usize,
+    pub(crate) top: f64,
+    pub(crate) placement: DropPlacement,
+}
+
+/// 拖拽待确认状态：记录开始拖拽时的索引、锚点和起始坐标。
+#[derive(Clone, Debug, PartialEq)]
+pub(crate) struct PendingDragState {
+    pub(crate) index: usize,
+    pub(crate) anchor: HoveredBlockState,
+    pub(crate) start_x: i32,
+    pub(crate) start_y: i32,
+}
diff --git a/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_document.rs b/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_document.rs
index 555ba051..02efd978 100644
--- a/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_document.rs
+++ b/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_document.rs
@@ -2,7 +2,7 @@
 
 use serde_json::{json, Value};
 
-use crate::DropPlacement;
+use crate::editor_runtime::block_hover_state::DropPlacement;
 
 fn document_content_mut(document: &mut Value) -> Result<&mut Vec<Value>, String> {
     document
diff --git a/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_legacy_html.rs b/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_legacy_html.rs
index 89c1f151..a8a71706 100644
--- a/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_legacy_html.rs
+++ b/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_menu_legacy_html.rs
@@ -15,7 +15,7 @@
 use wasm_bindgen::JsCast;
 use web_sys::{window, Element};
 
-use crate::DropPlacement;
+use crate::editor_runtime::block_hover_state::DropPlacement;
 
 /// 复制第 `index` 个顶层 HTML 块并插入其后。
 ///
diff --git a/rust/spikes/leptos-tiptap-spike/src/editor_runtime/mod.rs b/rust/spikes/leptos-tiptap-spike/src/editor_runtime/mod.rs
index 61a1c9f7..0819f726 100644
--- a/rust/spikes/leptos-tiptap-spike/src/editor_runtime/mod.rs
+++ b/rust/spikes/leptos-tiptap-spike/src/editor_runtime/mod.rs
@@ -1,5 +1,6 @@
 pub(crate) mod attachment_links;
 pub(crate) mod attachment_upload;
+pub(crate) mod block_hover_state;
 pub(crate) mod block_menu_document;
 pub(crate) mod block_menu_legacy_html;
 pub(crate) mod command_sync;
diff --git a/rust/spikes/leptos-tiptap-spike/src/lib.rs b/rust/spikes/leptos-tiptap-spike/src/lib.rs
index cf519d5b..52c506d1 100644
--- a/rust/spikes/leptos-tiptap-spike/src/lib.rs
+++ b/rust/spikes/leptos-tiptap-spike/src/lib.rs
@@ -24,6 +24,9 @@ use editor_runtime::attachment_upload::dispatch_editor_upload_request;
 use editor_runtime::block_menu_legacy_html::{
     duplicate_top_level_block_html, reorder_top_level_block_html,
 };
+use editor_runtime::block_hover_state::{
+    BlockMenuLayout, DropIndicatorState, DropPlacement, HoveredBlockState, PendingDragState,
+};
 use editor_runtime::command_sync::{
     read_editor_snapshot, sync_editor_outputs, sync_persisted_editor_command,
 };
@@ -4783,14 +4786,6 @@ fn build_command_listener(mount_id: u32) -> Closure<dyn FnMut(Event)> {
     }))
 }
 
-#[derive(Clone, Debug, PartialEq)]
-struct HoveredBlockState {
-    index: usize,
-    label: String,
-    top: f64,
-    height: f64,
-}
-
 #[derive(Clone, Debug, PartialEq)]
 struct ImageToolbarAnchor {
     top: f64,
@@ -4829,35 +4824,6 @@ struct TableSelectionOverlayState {
     index: usize,
 }
 
-#[derive(Clone, Debug, PartialEq)]
-struct BlockMenuLayout {
-    max_height: f64,
-    open_upward: bool,
-    top: f64,
-    left: f64,
-}
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub(crate) enum DropPlacement {
-    Before,
-    After,
-}
-
-#[derive(Clone, Debug, PartialEq)]
-struct DropIndicatorState {
-    index: usize,
-    top: f64,
-    placement: DropPlacement,
-}
-
-#[derive(Clone, Debug, PartialEq)]
-struct PendingDragState {
-    index: usize,
-    anchor: HoveredBlockState,
-    start_x: i32,
-    start_y: i32,
-}
-
 fn default_title() -> String {
     "Leptos Tiptap 主编辑器 P0".to_string()
 }