refactor: extract block hover state types

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,
+}

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

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。
 ///

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;