feat(tui): integrate rich context builder into agent turn process

apps/interfaces/tui/src/turn.rs

@@ -129,9 +129,13 @@ fn run_turn(params: TurnParams) {
 
     if let Some(root) = params.workspace_roots.first() {
         let tree = zesdex_infrastructure::utils::build_workspace_tree(root, 800);
+        let rich_ctx = zesdex_infrastructure::utils::build_rich_context(root);
+        
         sys_prompt.push_str("\n\nWorkspace structure:\n```\n");
         sys_prompt.push_str(&tree);
-        sys_prompt.push_str("\n```\n");
+        sys_prompt.push_str("\n```\n\n");
+        
+        sys_prompt.push_str(&rich_ctx);
     }
 
     let sys_msg = ChatMessage::system(sys_prompt);