fix: correct API path documentation and remove missing delete handler

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/modes/server/api/item.rs

@@ -160,16 +160,16 @@ pub async fn handle_post_item(
 }
 
 #[utoipa::path(
-    delete,
+    get,
     path = "/api/item/{item_id}",
     responses(
-        (status = 200, description = "Successfully deleted item", body = ApiResponse<()>),
+        (status = 200, description = "Successfully retrieved item content", body = ApiResponse<String>),
         (status = 401, description = "Unauthorized"),
         (status = 404, description = "Item not found"),
         (status = 500, description = "Internal server error")
     ),
     params(
-        ("item_id" = i64, Path, description = "ID of the item to delete")
+        ("item_id" = i64, Path, description = "ID of the item to retrieve")
     ),
     security(
         ("bearerAuth" = [])