fix(dashboard,server): restore code change ledger UI and enrich model schema parity and pagination

server/src/handlers/tasks.rs

@@ -266,8 +266,9 @@ impl McpTool for TasksHandler {
             }
             TaskAction::List => {
                 let level = req.summary_level.as_deref().unwrap_or("detailed");
+                let offset = req.offset.unwrap_or(0);
                 let data = state.project.tasks.read_with(|tasks| {
-                    let mut filtered: Vec<_> = tasks
+                    let matching: Vec<_> = tasks
                         .iter()
                         .filter(|t| {
                             let status_match = match req.status.as_deref() {
@@ -281,6 +282,11 @@ impl McpTool for TasksHandler {
                             };
                             status_match && branch_match
                         })
+                        .collect();
+
+                    let mut filtered: Vec<_> = matching
+                        .into_iter()
+                        .skip(offset)
                         .map(|t| match level {
                             "compact" => serde_json::json!({ "id": t.id, "title": t.title, "status": t.status }),
                             "full" => serde_json::to_value(t).unwrap_or_default(),