fix: 若干改进

src/heurams/interface/screens/nucreator.py

@@ -20,12 +20,23 @@ class NucleonCreatorScreen(Screen):
     def __init__(self) -> None:
         super().__init__(name=None, id=None, classes=None)
 
-    def search_templates():
-        from heurams.context import 
-
     def search_templates(self):
-        with open('r','/template/t.timl'):
-            pass
+        from pathlib import Path
+        from heurams.context import config_var
+        template_dir = Path(config_var.get()['paths']['template_dir'])
+        templates = list()
+        for i in template_dir.iterdir():
+            if i.name.endswith('.toml'):
+                try:
+                    import toml
+                    with open('r', i) as f:
+                        dic = toml.load(f)
+                        desc = dic['__metadata__']['attribution']['desc']
+                        templates.append(desc + ' (' + i.name + ')')
+                except:
+                    templates.append(f'无描述模板 ({i.name})')
+        print(templates)
+        return templates
 
     def compose(self) -> ComposeResult:
         yield Header(show_clock=True)