add contract md folder support

actix_mvc_app/src/models/contract.rs

@@ -136,6 +136,14 @@ impl ContractRevision {
     }
 }
 
+/// Table of Contents item for multi-page contracts
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TocItem {
+    pub title: String,
+    pub file: String,
+    pub children: Vec<TocItem>,
+}
+
 /// Contract model
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Contract {
@@ -153,6 +161,9 @@ pub struct Contract {
     pub revisions: Vec<ContractRevision>,
     pub current_version: u32,
     pub organization_id: Option<String>,
+    // Multi-page markdown support
+    pub content_dir: Option<String>,
+    pub toc: Option<Vec<TocItem>>,
 }
 
 impl Contract {
@@ -171,8 +182,10 @@ impl Contract {
             expiration_date: None,
             signers: Vec::new(),
             revisions: Vec::new(),
-            current_version: 0,
+            current_version: 1,
             organization_id,
+            content_dir: None,
+            toc: None,
         }
     }