Merge #109 into develop_web from feature/20251219_yjp

feat(dashboard): add statistics API and enhance homepage dashboard cards

* feature/20251219_yjp: (2 commits)
  feat(index): add homepage with dashboard cards and knowledge graph support
  feat(dashboard): add statistics API and enhance homepage dashboard cards

Signed-off-by: vrhs@163.com <accounts_660b6454a0eb398d3f8d2c76@mail.teambition.com>
Merged-by: vrhs@163.com <accounts_660b6454a0eb398d3f8d2c76@mail.teambition.com>

CR-link: https://codeup.aliyun.com/redbearai/python/redbear-mem-open/change/109

web/src/store/menu.json

@@ -1,5 +1,18 @@
 {
   "manage": [
+    {
+      "id": 999,
+      "parent": 0,
+      "code": "dashboard",
+      "label": "首页",
+      "i18nKey": "menu.home",
+      "path": "/index",
+      "enable": true,
+      "display": true,
+      "level": 1,
+      "sort": 0,
+      "subs": []
+    },
     {
       "id": 1,
       "parent": 0,