feat&fix: implement task status caching for improved performance and add cache handling in brief status retrieval

monitor/main.py

@@ -12,6 +12,9 @@ from dotenv import load_dotenv
 # Load environment variables from .env file
 load_dotenv()
 
+# {task_type}_{task_id}: status_dict
+TASK_STATUS_CACHE = {}
+
 app = Flask(__name__)
 
 # Load configuration from environment variables
@@ -157,6 +160,13 @@ def get_task_status_brief(task_type, task_id):
     """
     Get brief status info for a task, without detailed step data, for fast homepage loading.
     """
+    # Generate cache key based on task type and ID
+    cache_key = f"{task_type}_{task_id}"
+    
+    #  Check if the status is already cached
+    if cache_key in TASK_STATUS_CACHE:
+        return TASK_STATUS_CACHE[cache_key]
+    
     result_dir = os.path.join(RESULTS_BASE_PATH, task_type, task_id)
     
     if not os.path.exists(result_dir):
@@ -259,13 +269,19 @@ def get_task_status_brief(task_type, task_id):
         except:
             result_content = "Result file not found"
     
-    return {
+    status_dict = {
         "status": status,
         "progress": step_count,
         "max_steps": MAX_STEPS,
         "last_update": last_update,
         "result": result_content
     }
+    
+    # Cache the status if it is done or error
+    if status.startswith("Done") or status == "Error":
+        TASK_STATUS_CACHE[cache_key] = status_dict
+    
+    return status_dict
 
 def get_all_tasks_status():
     task_list = load_task_list()