feat: add shallow fetch and grouped skill selection

skiff/selector.py

@@ -14,6 +14,8 @@ class SkillChoice:
     description: str = ""
     installed: bool = False
     readonly_status: str = ""
+    children: tuple[str, ...] = ()
+    indent: int = 0
 
 
 def fit_to_width(text: str, width: int) -> str:
@@ -74,7 +76,19 @@ def select_skills(
     except ImportError as exc:
         raise RuntimeError("当前 Python 环境不支持 curses，无法打开交互界面") from exc
 
-    selected = {choice.name for choice in choices if choice.installed}
+    selected = {
+        choice.name
+        for choice in choices
+        if choice.installed and not choice.children
+    }
+
+    def mark_for(choice: SkillChoice) -> str:
+        if not choice.children:
+            return "x" if choice.name in selected else " "
+        selected_children = selected.intersection(choice.children)
+        if len(selected_children) == len(choice.children):
+            return "x"
+        return "-" if selected_children else " "
 
     def draw(stdscr: object) -> set[str] | None:
         curses.curs_set(0)
@@ -122,11 +136,11 @@ def select_skills(
             for offset, choice in enumerate(visible[start : start + item_capacity]):
                 index = start + offset
                 row = 3 + offset * 3
-                mark = "x" if choice.name in selected else " "
+                mark = mark_for(choice)
                 description = f"    {choice.description}" if choice.description else ""
                 focus_attr = curses.A_REVERSE if index == current else curses.A_NORMAL
                 parts = [
-                    (f"[{mark}] ", focus_attr),
+                    (f"{'  ' * choice.indent}[{mark}] ", focus_attr),
                     (choice.name, focus_attr | curses.A_BOLD),
                     (f"  {choice.kind}", focus_attr | source_attr),
                 ]
@@ -171,8 +185,15 @@ def select_skills(
             elif key == curses.KEY_DOWN and visible:
                 current = (current + 1) % len(visible)
             elif key == " " and visible:
-                name = visible[current].name
-                selected.symmetric_difference_update({name})
+                choice = visible[current]
+                if choice.children:
+                    children = set(choice.children)
+                    if children.issubset(selected):
+                        selected.difference_update(children)
+                    else:
+                        selected.update(children)
+                else:
+                    selected.symmetric_difference_update({choice.name})
             elif key == "/":
                 curses.curs_set(1)
                 query = _read_query(stdscr, curses, width, row=2)