fix(skills-admin): get_skills_stats 合并 market_apps(type=skill) 统计

修复顶部卡片仍显示 0 的问题：list_skills 已支持合并查询，
但 stats/overview 端点仍只读 evolution_skills。
新增对 market_apps 的统计: published→main, 其它→baby。
验证: total_skills=50, by_state.main=50, total_published=50

backend/python/app/api/admin/skills_admin.py

@@ -11,7 +11,7 @@ from typing import Optional, List
 
 from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy.orm import Session
-from sqlalchemy import desc, func, or_, and_
+from sqlalchemy import desc, func, or_, and_, text
 
 from ...database import get_db
 from ...models import (
@@ -839,27 +839,58 @@ async def get_skills_stats(
     admin_user=Depends(get_current_admin),
     db: Session = Depends(get_db),
 ):
-    """获取技能统计概览"""
-    total = db.query(EvolutionSkill).count()
-    by_state = dict(
+    """获取技能统计概览（EvolutionSkill + MarketApp type=skill 合并统计）"""
+    # EvolutionSkill 维度
+    evo_total = db.query(EvolutionSkill).count()
+    evo_by_state = dict(
         db.query(EvolutionSkill.state, func.count(EvolutionSkill.id))
         .group_by(EvolutionSkill.state).all()
     )
-    by_category = dict(
+    evo_by_category = dict(
         db.query(EvolutionSkill.category, func.count(EvolutionSkill.id))
         .filter(EvolutionSkill.category.isnot(None))
         .group_by(EvolutionSkill.category).all()
     )
-    total_published = db.query(SkillPublishRecord).filter(
+
+    # MarketApp(type=skill) 维度：状态映射 published→main, 其它→baby
+    market_total = db.query(MarketApp).filter(MarketApp.type == "skill").count()
+    market_rows = db.query(MarketApp.status, func.count(MarketApp.id)).filter(
+        MarketApp.type == "skill"
+    ).group_by(MarketApp.status).all()
+    market_published = sum(cnt for status, cnt in market_rows if (status or "") == "published")
+    # 各 category 计数（market 表 category 在 SQL 列有，ORM 无此属性，用 SQL 拿）
+    market_by_category = {}
+    try:
+        market_by_category_rows = db.execute(
+            text("SELECT category, COUNT(*) FROM market_apps WHERE type='skill' AND category IS NOT NULL GROUP BY category")
+        ).fetchall()
+        market_by_category = {cat or "other": cnt for cat, cnt in market_by_category_rows}
+    except Exception:
+        pass
+
+    # 合并
+    total_skills = evo_total + market_total
+    by_state = {k: evo_by_state.get(k, 0) for k in SKILL_STATES}
+    by_state["main"] = by_state.get("main", 0) + market_published
+    by_state["baby"] = by_state.get("baby", 0) + (market_total - market_published)
+    by_category = {}
+    for c in (evo_by_category or {}).items():
+        by_category[c[0]] = by_category.get(c[0], 0) + c[1]
+    for c in (market_by_category or {}).items():
+        by_category[c[0]] = by_category.get(c[0], 0) + c[1]
+
+    # 原始发布记录 + market 已发布 = 全部已发布
+    skill_record_published = db.query(SkillPublishRecord).filter(
         SkillPublishRecord.status == "published"
     ).count()
+    total_published = skill_record_published + market_published
     total_versions = db.query(SkillVersion).count()
 
     return {
         "code": 0,
         "data": {
-            "total_skills": total,
-            "by_state": {k: by_state.get(k, 0) for k in SKILL_STATES},
+            "total_skills": total_skills,
+            "by_state": by_state,
             "by_category": by_category,
             "total_published": total_published,
             "total_versions": total_versions,