chore: 保存当前架构收口与 bug 修复快照

归档本轮 P0/P1 bug 修复、设计审查迁移、AI selection scope 收口与 stream contract 调整，并保留当前 05 主线迁移起点。

rust/crates/core-protocol/src/editor/model.rs

@@ -19,6 +19,7 @@ pub enum EditorBlockType {
     Toc,
     PageReference,
     BlockReference,
+    Resource,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]

rust/crates/core-protocol/src/editor/tiptap.rs

@@ -588,6 +588,18 @@ fn block_to_tiptap_node(
                 content: Vec::new(),
             })
         }
+        EditorBlockType::Resource => Ok(TiptapNode::Paragraph {
+            attrs: TiptapParagraphAttrs {
+                block_id: Some(block.block_id.clone()),
+                text_align: text_align_from_props(&block.props),
+                mnote_block_type: Some("resource".into()),
+                mindmap_id: None,
+                root_node_id: None,
+                projection_version: None,
+                extra: block.props.extra.clone(),
+            },
+            content,
+        }),
         EditorBlockType::Heading => Ok(TiptapNode::Heading {
             attrs: TiptapHeadingAttrs {
                 level: block.props.heading_level.unwrap_or(1),
@@ -698,6 +710,21 @@ fn node_to_block(
                 child_block_ids: vec![],
             })
         }
+        TiptapNode::Paragraph { attrs, content }
+            if attrs.mnote_block_type.as_deref() == Some("resource") =>
+        {
+            let mut props = props_with_text_align(attrs.text_align.clone());
+            for (key, value) in &attrs.extra {
+                props.extra.insert(key.clone(), value.clone());
+            }
+            Ok(EditorBlock {
+                block_id: attrs.block_id.clone().unwrap_or(fallback_block_id),
+                block_type: EditorBlockType::Resource,
+                props,
+                content_nodes: text_nodes_from_tiptap(content)?,
+                child_block_ids: vec![],
+            })
+        }
         TiptapNode::Paragraph { attrs, content } => Ok(EditorBlock {
             block_id: attrs.block_id.clone().unwrap_or(fallback_block_id),
             block_type: EditorBlockType::Paragraph,