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 8979c198..bad7dceb 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
@@ -287,3 +287,7 @@ UI / 浏览器可见项必须有真实浏览器截图或结构化 smoke 证据
   - 审计结论经 Codex 复核后采纳：`handle_lane_left(stage_rect_width)` 属于 editor layout helper，不应迁入 `editor_runtime/block_dnd.rs`；若继续推进 DnD 边界，下一刀应迁 `pointer_in_handle_corridor` 这一层 DOM 查询包装，而不是复制 `CONTENT_COLUMN_*` / `HANDLE_*` 常量。
   - Codex 主控完成后续小切片：`editor_runtime/block_dnd.rs` 新增 `pointer_in_handle_corridor(client_x, client_y, block, handle_selector, handle_left_fallback, handle_width)`，承接 block/stage/handle DOM 查询与 `HandleCorridorGeometry` 组装；`lib.rs` 删除同名 wrapper，调用点改为显式委托 `block_dnd` helper，并继续由壳层传入 `handle_lane_left(stage_rect.width())` fallback，不复制布局常量。
   - 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`、临时当前源码服务 `MNOTE_WEB_BIND=127.0.0.1:3018 MNOTE_WEB_PUBLIC_BIND=127.0.0.1:3018 cargo run --manifest-path rust/Cargo.toml -p mnote-web`、`MNOTE_WEB_SMOKE_BASE_URL=http://127.0.0.1:3018 NODE_PATH=/mnt/Data1T/mnote/node_modules node scripts/task489-block-menu-delete-undo-smoke.js`、`MNOTE_WEB_SMOKE_BASE_URL=http://127.0.0.1:3018 NODE_PATH=/mnt/Data1T/mnote/node_modules node scripts/task488-local-attachment-link-delete-undo-smoke.js`、`MNOTE_WEB_SMOKE_BASE_URL=http://127.0.0.1:3018 NODE_PATH=/mnt/Data1T/mnote/node_modules node scripts/task479-local-folder-markdown-resource-lifecycle-smoke.js`。
+- 2026-05-25：Batch AJ 未派发 Reasonix worker；主控直接收口 `hovered_block_from_target` 的共享 DnD/hover 解析层。
+  - 修改：`editor_runtime/block_dnd.rs` 新增 `hovered_block_from_target(target, root, handle_selector)`，承接 `target_element`、handle shell 过滤、direct block index 解析和 `block_state_from_index(index)` 委托；`lib.rs` 的同名函数退化为只负责获取 `editor_root_element()` 后调用 runtime helper。
+  - 边界：未迁 `hovered_block_from_selection`、`drop_indicator_from_target`、`drop_indicator_from_point`、drag/drop listener、keyboard signal 分支或 block reorder 行为；本批只外置共享 target -> `HoveredBlockState` 解析层。
+  - 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`、临时当前源码服务 `MNOTE_WEB_BIND=127.0.0.1:3020 MNOTE_WEB_PUBLIC_BIND=127.0.0.1:3020 cargo run --manifest-path rust/Cargo.toml -p mnote-web`、`MNOTE_WEB_SMOKE_BASE_URL=http://127.0.0.1:3020 NODE_PATH=/mnt/Data1T/mnote/node_modules node scripts/task489-block-menu-delete-undo-smoke.js`、`MNOTE_WEB_SMOKE_BASE_URL=http://127.0.0.1:3020 NODE_PATH=/mnt/Data1T/mnote/node_modules node scripts/task488-local-attachment-link-delete-undo-smoke.js`、`MNOTE_WEB_SMOKE_BASE_URL=http://127.0.0.1:3020 NODE_PATH=/mnt/Data1T/mnote/node_modules node scripts/task479-local-folder-markdown-resource-lifecycle-smoke.js`。
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 8e33bed7..d7861adc 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_dnd.rs b/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_dnd.rs
index 83039749..86e12894 100644
--- a/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_dnd.rs
+++ b/rust/spikes/leptos-tiptap-spike/src/editor_runtime/block_dnd.rs
@@ -129,6 +129,16 @@ pub(crate) fn drop_indicator_from_block_rects(
     )
 }
 
+pub(crate) fn hovered_block_from_target(
+    target: EventTarget,
+    root: &Element,
+    handle_selector: &str,
+) -> Option<HoveredBlockState> {
+    let element = crate::editor_runtime::dom_events::target_element(target)?;
+    let index = direct_block_index_from_element(&element, root, handle_selector)?;
+    block_state_from_index(index)
+}
+
 pub(crate) fn block_state_from_index(index: usize) -> Option<HoveredBlockState> {
     let root = editor_root_element()?;
     let stage = editor_stage_element()?;
diff --git a/rust/spikes/leptos-tiptap-spike/src/lib.rs b/rust/spikes/leptos-tiptap-spike/src/lib.rs
index 6c24c7a7..05daa813 100644
--- a/rust/spikes/leptos-tiptap-spike/src/lib.rs
+++ b/rust/spikes/leptos-tiptap-spike/src/lib.rs
@@ -23,8 +23,8 @@ use web_sys::{
 use editor_runtime::attachment_upload::dispatch_editor_upload_request;
 use editor_runtime::block_dnd::{
     block_state_from_index as block_state_from_index_runtime, direct_block_from_element,
-    direct_block_index_from_element, drop_indicator_from_block_rects, element_within_handle_shell,
-    event_target_from_point, top_level_block_index,
+    drop_indicator_from_block_rects, element_within_handle_shell, event_target_from_point,
+    hovered_block_from_target as hovered_block_from_target_runtime, top_level_block_index,
 };
 use editor_runtime::block_menu_overlay;
 use editor_runtime::block_menu_document::{
@@ -4847,9 +4847,7 @@ fn trap_scroll_inside_menu(event: &WheelEvent) {
 
 fn hovered_block_from_target(target: web_sys::EventTarget) -> Option<HoveredBlockState> {
     let root = editor_root_element()?;
-    let element = target_element(target)?;
-    let index = direct_block_index_from_element(&element, &root, HANDLE_SHELL_SELECTOR)?;
-    block_state_from_index(index)
+    hovered_block_from_target_runtime(target, &root, HANDLE_SHELL_SELECTOR)
 }
 
 fn hovered_block_from_selection() -> Option<HoveredBlockState> {