diff --git a/package-lock.json b/package-lock.json
index 6fdedbf..ba297ba 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,6 @@
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@@ -19,6 +18,7 @@
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-          "type": "github",
-          "url": "https://github.com/sponsors/feross"
-        },
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-          "type": "patreon",
-          "url": "https://www.patreon.com/feross"
-        },
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-          "url": "https://www.patreon.com/feross"
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@@ -2261,11 +2191,6 @@
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@@ -2452,14 +2355,6 @@
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-      "resolved": "https://registry.npmmirror.com/detect-libc/-/detect-libc-2.1.2.tgz",
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@@ -2531,14 +2426,6 @@
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@@ -2805,14 +2692,6 @@
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@@ -2948,11 +2827,6 @@
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@@ -3059,11 +2933,6 @@
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@@ -3143,11 +3012,6 @@
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@@ -3254,25 +3118,6 @@
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-      "resolved": "https://registry.npmmirror.com/ieee754/-/ieee754-1.2.1.tgz",
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-          "type": "github",
-          "url": "https://github.com/sponsors/feross"
-        },
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-          "type": "patreon",
-          "url": "https://www.patreon.com/feross"
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@@ -3714,17 +3554,6 @@
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@@ -3745,11 +3574,6 @@
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@@ -4196,32 +3985,6 @@
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-      "deprecated": "No longer maintained. Please contact the author of the relevant native addon; alternatives are available.",
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-      "dependencies": {
-        "inherits": "^2.0.3",
-        "string_decoder": "^1.1.1",
-        "util-deprecate": "^1.0.1"
-      },
-      "engines": {
-        "node": ">= 6"
-      }
-    },
     "node_modules/readdirp": {
       "version": "3.6.0",
       "resolved": "https://registry.npmmirror.com/readdirp/-/readdirp-3.6.0.tgz",
@@ -4814,49 +4533,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/simple-concat": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmmirror.com/simple-concat/-/simple-concat-1.0.1.tgz",
-      "integrity": "sha512-cSFtAPtRhljv69IK0hTVZQ+OfE9nePi/rtJmw5UjHeVyVroEqJXP1sFztKUy1qU+xvz3u/sfYJLa947b7nAN2Q==",
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/feross"
-        },
-        {
-          "type": "patreon",
-          "url": "https://www.patreon.com/feross"
-        },
-        {
-          "type": "consulting",
-          "url": "https://feross.org/support"
-        }
-      ]
-    },
-    "node_modules/simple-get": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmmirror.com/simple-get/-/simple-get-4.0.1.tgz",
-      "integrity": "sha512-brv7p5WgH0jmQJr1ZDDfKDOSeWWg+OVypG99A/5vYGPqJ6pxiaHLy8nxtFjBA7oMa01ebA9gfh1uMCFqOuXxvA==",
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/feross"
-        },
-        {
-          "type": "patreon",
-          "url": "https://www.patreon.com/feross"
-        },
-        {
-          "type": "consulting",
-          "url": "https://feross.org/support"
-        }
-      ],
-      "dependencies": {
-        "decompress-response": "^6.0.0",
-        "once": "^1.3.1",
-        "simple-concat": "^1.0.0"
-      }
-    },
     "node_modules/size-sensor": {
       "version": "1.0.3",
       "resolved": "https://registry.npmmirror.com/size-sensor/-/size-sensor-1.0.3.tgz",
@@ -4942,6 +4618,11 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/sql.js": {
+      "version": "1.14.0",
+      "resolved": "https://registry.npmmirror.com/sql.js/-/sql.js-1.14.0.tgz",
+      "integrity": "sha512-NXYh+kFqLiYRCNAaHD0PcbjFgXyjuolEKLMk5vRt2DgPENtF1kkNzzMlg42dUk5wIsH8MhUzsRhaUxIisoSlZQ=="
+    },
     "node_modules/statuses": {
       "version": "2.0.2",
       "resolved": "https://registry.npmmirror.com/statuses/-/statuses-2.0.2.tgz",
@@ -4950,14 +4631,6 @@
         "node": ">= 0.8"
       }
     },
-    "node_modules/string_decoder": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmmirror.com/string_decoder/-/string_decoder-1.3.0.tgz",
-      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
-      "dependencies": {
-        "safe-buffer": "~5.2.0"
-      }
-    },
     "node_modules/strip-json-comments": {
       "version": "3.1.1",
       "resolved": "https://registry.npmmirror.com/strip-json-comments/-/strip-json-comments-3.1.1.tgz",
@@ -5083,32 +4756,6 @@
         "node": ">=14.0.0"
       }
     },
-    "node_modules/tar-fs": {
-      "version": "2.1.4",
-      "resolved": "https://registry.npmmirror.com/tar-fs/-/tar-fs-2.1.4.tgz",
-      "integrity": "sha512-mDAjwmZdh7LTT6pNleZ05Yt65HC3E+NiQzl672vQG38jIrehtJk/J3mNwIg+vShQPcLF/LV7CMnDW6vjj6sfYQ==",
-      "dependencies": {
-        "chownr": "^1.1.1",
-        "mkdirp-classic": "^0.5.2",
-        "pump": "^3.0.0",
-        "tar-stream": "^2.1.4"
-      }
-    },
-    "node_modules/tar-stream": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmmirror.com/tar-stream/-/tar-stream-2.2.0.tgz",
-      "integrity": "sha512-ujeqbceABgwMZxEJnk2HDY2DlnUZ+9oEcb1KzTVfYHio0UE6dG71n60d8D2I4qNvleWrrXpmjpt7vZeF1LnMZQ==",
-      "dependencies": {
-        "bl": "^4.0.3",
-        "end-of-stream": "^1.4.1",
-        "fs-constants": "^1.0.0",
-        "inherits": "^2.0.3",
-        "readable-stream": "^3.1.1"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/thenify": {
       "version": "3.3.1",
       "resolved": "https://registry.npmmirror.com/thenify/-/thenify-3.3.1.tgz",
@@ -5223,17 +4870,6 @@
       "resolved": "https://registry.npmmirror.com/tslib/-/tslib-2.3.0.tgz",
       "integrity": "sha512-N82ooyxVNm6h1riLCoyS9e3fuJ3AMG2zIZs2Gd1ATcSFjSA23Q0fzjjZeh0jbJvWVDZ0cJT8yaNNaaXHzueNjg=="
     },
-    "node_modules/tunnel-agent": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmmirror.com/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
-      "integrity": "sha512-McnNiV1l8RYeY8tBgEpuodCC1mLUdbSN+CYBL7kJsJNInOP8UjDDEwdk6Mw60vdLLrr5NHKZhMAOSrR2NZuQ+w==",
-      "dependencies": {
-        "safe-buffer": "^5.0.1"
-      },
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmmirror.com/type-check/-/type-check-0.4.0.tgz",
@@ -5371,7 +5007,8 @@
     "node_modules/util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmmirror.com/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
+      "dev": true
     },
     "node_modules/utils-merge": {
       "version": "1.0.1",
@@ -5472,11 +5109,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/wrappy": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmmirror.com/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
-    },
     "node_modules/ws": {
       "version": "8.19.0",
       "resolved": "https://registry.npmmirror.com/ws/-/ws-8.19.0.tgz",
diff --git a/package.json b/package.json
index 07e3cc5..6e3c9d0 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,6 @@
     "verify:full": "./scripts/verify-pipeline.sh --start-crawler"
   },
   "dependencies": {
-    "better-sqlite3": "^11.6.0",
     "cors": "^2.8.5",
     "echarts": "^5.5.0",
     "echarts-for-react": "^3.0.2",
@@ -31,6 +30,7 @@
     "react-dom": "^18.3.1",
     "react-map-gl": "^7.1.7",
     "react-router-dom": "^7.13.1",
+    "sql.js": "^1.11.0",
     "swagger-ui-express": "^5.0.1",
     "ws": "^8.19.0",
     "zustand": "^5.0.0"
diff --git a/server/README.md b/server/README.md
new file mode 100644
index 0000000..9c9895c
--- /dev/null
+++ b/server/README.md
@@ -0,0 +1,170 @@
+# 后端运行逻辑
+
+后端是 **Node.js Express + SQLite + WebSocket**，与 Python 爬虫共用同一数据库文件，负责提供「态势数据」API、实时推送和简单统计。
+
+---
+
+## 一、启动方式
+
+```bash
+npm run api   # 启动 server/index.js，默认端口 3001
+```
+
+- 端口：`process.env.API_PORT || 3001`
+- 数据库：`process.env.DB_PATH` 或 `server/data.db`（与爬虫共用）
+
+---
+
+## 二、整体架构
+
+```
+                    ┌─────────────────────────────────────────┐
+                    │           server/index.js                │
+                    │  (HTTP Server + WebSocket Server)        │
+                    └─────────────────────────────────────────┘
+                                         │
+         ┌───────────────────────────────┼───────────────────────────────┐
+         │                               │                               │
+         ▼                               ▼                               ▼
+   ┌─────────────┐               ┌─────────────┐                 ┌─────────────┐
+   │ /api/*      │               │ /ws         │                 │ 静态 dist   │
+   │ routes.js   │               │ WebSocket   │                 │ (生产)      │
+   └──────┬──────┘               └──────┬──────┘                 └─────────────┘
+          │                             │
+          │ 读/写                       │ 广播 situation + stats
+          ▼                             │
+   ┌─────────────┐                      │
+   │ db.js       │◄─────────────────────┘
+   │ (SQLite)    │   getSituation() / getStats()
+   └──────┬──────┘
+          │
+          │ 同文件 data.db
+          ▼
+   ┌─────────────┐
+   │ Python 爬虫  │  抓取 → 去重 → AI 清洗 → 映射到库字段 → 写表 → POST /api/crawler/notify
+   │ situation_   │  (main.py 或 gdelt 服务；写 situation_update / news_content / combat_losses 等)
+   │ update 等    │
+   └─────────────┘
+```
+
+---
+
+## 三、核心模块
+
+| 文件 | 作用 |
+|------|------|
+| **index.js** | 创建 HTTP + WebSocket 服务，挂载路由、静态资源、定时广播、爬虫通知回调 |
+| **routes.js** | 所有 `/api/*` 接口：situation、db/dashboard、visit、feedback、share、stats、events、news 等 |
+| **situationData.js** | `getSituation()`：从多张表聚合为前端所需的「态势」JSON（军力、基地、战损、事件脉络、GDELT 等） |
+| **db.js** | SQLite 连接、建表、迁移（better-sqlite3，WAL 模式） |
+| **stats.js** | `getStats()`：在看人数、累计访问、留言数、分享数 |
+| **openapi.js** | Swagger/OpenAPI 文档定义 |
+| **seed.js** | 初始化/重置种子数据（可单独运行 `npm run api:seed`） |
+
+---
+
+## 四、数据流（读）
+
+1. **前端要「整页态势」**  
+   - 请求 `GET /api/situation` → `routes.js` 调用 `getSituation()`  
+   - `situationData.js` 从 db 读：`force_summary`、`power_index`、`force_asset`、`key_location`、`combat_losses`、`wall_street_trend`、`retaliation_*`、`situation_update`（最近 50 条）、`gdelt_events`、`conflict_stats` 等  
+   - 组装成 `{ lastUpdated, usForces, iranForces, recentUpdates, conflictEvents, conflictStats, civilianCasualtiesTotal }` 返回。
+
+2. **前端要「事件列表」**  
+   - `GET /api/events` 返回 `conflictEvents` + `conflict_stats` + `updated_at`（同样来自 getSituation 的数据）。
+
+3. **前端要「原始表数据」**  
+   - `GET /api/db/dashboard` 返回多张表的 `SELECT *` 结果（含 `situation_update`），供 `/db` 调试页使用。
+
+4. **WebSocket**  
+   - 连接 `ws://host/ws` 时立即收到一条 `{ type: 'situation', data: getSituation(), stats: getStats() }`。  
+   - 之后每 3 秒服务端主动广播同结构数据，前端可据此做实时刷新。
+
+---
+
+## 五、数据流（写）
+
+### 5.1 爬虫侧写库链路（推荐理解顺序）
+
+爬虫写入前端库的完整链路如下，**不是**「抓完直接写表」，而是经过去重、AI 清洗、字段映射后再落库：
+
+1. **爬虫抓取实时数据**  
+   - RSS 等源抓取（`scrapers/rss_scraper.fetch_all`），得到原始条目列表。
+
+2. **数据去重**  
+   - 抓取阶段：RSS 内按 (title, url) 去重。  
+   - 落库前：按 `content_hash(title, summary, url)` 在 `news_content` 表中去重，仅**未出现过**的条目进入后续流程（`news_storage.save_and_dedup`）。
+
+3. **去重后按批次推送给 AI 清洗**  
+   - 对通过去重的每条/每批数据：  
+     - **展示用清洗**：标题/摘要翻译、`clean_news_for_panel` 提炼为符合面板的纯文本与长度（如 summary ≤120 字），`ensure_category` / `ensure_severity` 规范为前端枚举（`cleaner_ai`）。  
+     - **结构化提取**（可选）：`extractor_ai` / `extractor_dashscope` / `extractor_rules` 从新闻文本中抽取战损、基地状态等，输出符合 `panel_schema` 的结构。  
+   - 得到「有效数据」：既有人读的 summary/category/severity，也有可落库的 combat_losses_delta、key_location 等。
+
+4. **有效数据映射回前端数据库字段**  
+   - 事件脉络：清洗后的条目写入 `situation_update`（`db_writer.write_updates`）。  
+   - 资讯存档：去重后的新数据写入 `news_content`（已在步骤 2 完成）。  
+   - 结构化数据：AI 提取结果通过 `db_merge.merge` 映射到前端表结构，更新 `combat_losses`、`key_location`、`retaliation_*`、`wall_street_trend` 等（与 `situationData.getSituation` 所用字段一致）。
+
+5. **更新数据库表并通知后端**  
+   - 上述表更新完成后，爬虫请求 **POST /api/crawler/notify**。  
+   - 后端（index.js）更新 `situation.updated_at` 并调用 `broadcastSituation()`，前端通过 WebSocket 拿到最新态势。
+
+实现上，**gdelt 服务**（`realtime_conflict_service`）里：先对抓取结果做翻译与清洗，再 `save_and_dedup` 去重落库 `news_content`，用去重后的新项写 `situation_update`，再按批次对这批新项做 AI 提取并 `db_merge.merge` 写战损/基地等表。
+
+### 5.2 用户行为写入
+
+- **POST /api/visit**：记 IP 到 `visits`，`visitor_count.total` +1，并触发一次广播。  
+- **POST /api/feedback**：插入 `feedback`。  
+- **POST /api/share**：`share_count.total` +1。  
+
+这些写操作在 `routes.js` 中通过 `db.prepare().run()` 完成。
+
+---
+
+## 六、API 一览
+
+| 方法 | 路径 | 说明 |
+|------|------|------|
+| GET | /api/health | 健康检查 |
+| GET | /api/situation | 完整态势（供主面板） |
+| GET | /api/events | 冲突事件 + 统计 |
+| GET | /api/db/dashboard | 各表原始数据（供 /db 页） |
+| GET | /api/news | 资讯列表（news_content 表） |
+| GET | /api/stats | 在看/累计/留言/分享数 |
+| POST | /api/visit | 记录访问并返回 stats |
+| POST | /api/feedback | 提交留言 |
+| POST | /api/share | 分享计数 +1 |
+| POST | /api/crawler/notify | 爬虫通知：更新 updated_at 并广播（内部用） |
+
+- **Swagger**：`http://localhost:3001/api-docs`
+
+---
+
+## 七、WebSocket 行为
+
+- **路径**：`/ws`（与 HTTP 同端口）。  
+- **连接时**：服务端发送一条 `{ type: 'situation', data, stats }`。  
+- **定时广播**：`setInterval(broadcastSituation, 3000)` 每 3 秒向所有已连接客户端推送最新 `getSituation()` + `getStats()`。  
+- **爬虫通知**：POST `/api/crawler/notify` 会立即执行一次 `broadcastSituation()`，不必等 3 秒。
+
+---
+
+## 八、与爬虫的协作
+
+- **共享 DB**：后端与爬虫都使用同一 `DB_PATH`（默认 `server/data.db`）。  
+- **爬虫写库链路**：爬虫抓取 → 去重 → AI 清洗出有效数据 → 映射到前端库字段 → 更新 `situation_update`、`news_content`、`combat_losses`、`key_location`、`gdelt_events` 等表 → 调用 POST `/api/crawler/notify` 通知后端。  
+- **后端角色**：只读这些表（`getSituation()` 等）并推送；不参与抓取、去重或 AI 清洗，不调度爬虫。
+
+整体上，后端是「读库 + 聚合 + 推送」的服务；写库来自**爬虫（经过去重与 AI 清洗、字段映射后）**以及**用户行为**（访问/留言/分享）。
+
+---
+
+## 九、本地验证链路
+
+1. **启动后端**：`npm run api`（默认 3001）。
+2. **检查读库**：`curl -s http://localhost:3001/api/situation` 应返回含 `lastUpdated`、`recentUpdates` 的 JSON。
+3. **检查写库与通知**：爬虫跑完流水线后会 POST `/api/crawler/notify`，后端会更新 `situation.updated_at` 并广播；可再请求 `/api/situation` 看 `lastUpdated` 是否更新。
+4. **查原始表**：浏览器打开 `http://localhost:3001/api/db/dashboard` 或前端 `/db` 页，查看 `situation_update`、`news_content` 等表。
+
+爬虫侧完整验证步骤见 **crawler/README.md** 的「本地验证链路」；项目根目录可执行 `./scripts/verify-pipeline.sh` 做一键检查。
diff --git a/server/data.db b/server/data.db
index 67ec2da..e458902 100644
Binary files a/server/data.db and b/server/data.db differ
diff --git a/server/data.db-shm b/server/data.db-shm
index 09a33a3..e1d2b9b 100644
Binary files a/server/data.db-shm and b/server/data.db-shm differ
diff --git a/server/data.db-wal b/server/data.db-wal
index 8a23795..77969ab 100644
Binary files a/server/data.db-wal and b/server/data.db-wal differ
diff --git a/server/db.js b/server/db.js
index bbe3357..92bb9d8 100644
--- a/server/db.js
+++ b/server/db.js
@@ -1,20 +1,67 @@
-const Database = require('better-sqlite3')
+/**
+ * SQLite 封装：使用 sql.js（纯 JS/WebAssembly，无需 node-gyp）
+ * 对外接口与 better-sqlite3 兼容：db.prepare().get/all/run、db.exec
+ */
 const path = require('path')
+const fs = require('fs')
 
 const dbPath = process.env.DB_PATH || path.join(__dirname, 'data.db')
-const db = new Database(dbPath)
+let _db = null
 
-// 启用外键
-db.pragma('journal_mode = WAL')
+function getDb() {
+  if (!_db) throw new Error('DB not initialized. Call initDb() first.')
+  return _db
+}
 
-// 建表
-db.exec(`
+function wrapDatabase(nativeDb, persist) {
+  return {
+    prepare(sql) {
+      return {
+        get(...args) {
+          const stmt = nativeDb.prepare(sql)
+          stmt.bind(args.length ? args : null)
+          const row = stmt.step() ? stmt.getAsObject() : undefined
+          stmt.free()
+          return row
+        },
+        all(...args) {
+          const stmt = nativeDb.prepare(sql)
+          stmt.bind(args.length ? args : null)
+          const rows = []
+          while (stmt.step()) rows.push(stmt.getAsObject())
+          stmt.free()
+          return rows
+        },
+        run(...args) {
+          const stmt = nativeDb.prepare(sql)
+          stmt.bind(args.length ? args : null)
+          while (stmt.step());
+          stmt.free()
+          persist()
+        },
+      }
+    },
+    exec(sql) {
+      const statements = sql.split(';').map((s) => s.trim()).filter(Boolean)
+      statements.forEach((s) => nativeDb.run(s))
+      persist()
+    },
+    pragma(str) {
+      nativeDb.run('PRAGMA ' + str)
+    },
+  }
+}
+
+function runMigrations(db) {
+  const exec = (sql) => db.exec(sql)
+  const prepare = (sql) => db.prepare(sql)
+
+  exec(`
   CREATE TABLE IF NOT EXISTS situation (
     id INTEGER PRIMARY KEY CHECK (id = 1),
     data TEXT NOT NULL,
     updated_at TEXT NOT NULL DEFAULT (datetime('now'))
   );
-
   CREATE TABLE IF NOT EXISTS force_summary (
     side TEXT PRIMARY KEY CHECK (side IN ('us', 'iran')),
     total_assets INTEGER NOT NULL,
@@ -26,7 +73,6 @@ db.exec(`
     missile_consumed INTEGER NOT NULL,
     missile_stock INTEGER NOT NULL
   );
-
   CREATE TABLE IF NOT EXISTS power_index (
     side TEXT PRIMARY KEY CHECK (side IN ('us', 'iran')),
     overall INTEGER NOT NULL,
@@ -34,7 +80,6 @@ db.exec(`
     economic_power INTEGER NOT NULL,
     geopolitical_influence INTEGER NOT NULL
   );
-
   CREATE TABLE IF NOT EXISTS force_asset (
     id TEXT PRIMARY KEY,
     side TEXT NOT NULL CHECK (side IN ('us', 'iran')),
@@ -45,7 +90,6 @@ db.exec(`
     lat REAL,
     lng REAL
   );
-
   CREATE TABLE IF NOT EXISTS key_location (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     side TEXT NOT NULL CHECK (side IN ('us', 'iran')),
@@ -55,7 +99,6 @@ db.exec(`
     type TEXT,
     region TEXT
   );
-
   CREATE TABLE IF NOT EXISTS combat_losses (
     side TEXT PRIMARY KEY CHECK (side IN ('us', 'iran')),
     bases_destroyed INTEGER NOT NULL,
@@ -67,24 +110,20 @@ db.exec(`
     armor INTEGER NOT NULL,
     vehicles INTEGER NOT NULL
   );
-
   CREATE TABLE IF NOT EXISTS wall_street_trend (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     time TEXT NOT NULL,
     value INTEGER NOT NULL
   );
-
   CREATE TABLE IF NOT EXISTS retaliation_current (
     id INTEGER PRIMARY KEY CHECK (id = 1),
     value INTEGER NOT NULL
   );
-
   CREATE TABLE IF NOT EXISTS retaliation_history (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     time TEXT NOT NULL,
     value INTEGER NOT NULL
   );
-
   CREATE TABLE IF NOT EXISTS situation_update (
     id TEXT PRIMARY KEY,
     timestamp TEXT NOT NULL,
@@ -92,7 +131,6 @@ db.exec(`
     summary TEXT NOT NULL,
     severity TEXT NOT NULL
   );
-
   CREATE TABLE IF NOT EXISTS gdelt_events (
     event_id TEXT PRIMARY KEY,
     event_time TEXT NOT NULL,
@@ -103,7 +141,6 @@ db.exec(`
     url TEXT,
     created_at TEXT DEFAULT (datetime('now'))
   );
-
   CREATE TABLE IF NOT EXISTS conflict_stats (
     id INTEGER PRIMARY KEY CHECK (id = 1),
     total_events INTEGER NOT NULL DEFAULT 0,
@@ -112,7 +149,6 @@ db.exec(`
     estimated_strike_count INTEGER NOT NULL DEFAULT 0,
     updated_at TEXT NOT NULL
   );
-
   CREATE TABLE IF NOT EXISTS news_content (
     id TEXT PRIMARY KEY,
     content_hash TEXT NOT NULL UNIQUE,
@@ -125,57 +161,49 @@ db.exec(`
     severity TEXT NOT NULL DEFAULT 'medium',
     created_at TEXT NOT NULL DEFAULT (datetime('now'))
   );
-  CREATE INDEX IF NOT EXISTS idx_news_content_hash ON news_content(content_hash);
-  CREATE INDEX IF NOT EXISTS idx_news_content_published ON news_content(published_at DESC);
-`)
+  `)
+  try { exec('CREATE INDEX IF NOT EXISTS idx_news_content_hash ON news_content(content_hash)') } catch (_) {}
+  try { exec('CREATE INDEX IF NOT EXISTS idx_news_content_published ON news_content(published_at DESC)') } catch (_) {}
 
-// 迁移：为已有 key_location 表添加 type、region、status、damage_level 列
-try {
-  const cols = db.prepare('PRAGMA table_info(key_location)').all()
-  const names = cols.map((c) => c.name)
-  if (!names.includes('type')) db.exec('ALTER TABLE key_location ADD COLUMN type TEXT')
-  if (!names.includes('region')) db.exec('ALTER TABLE key_location ADD COLUMN region TEXT')
-  if (!names.includes('status')) db.exec('ALTER TABLE key_location ADD COLUMN status TEXT DEFAULT "operational"')
-  if (!names.includes('damage_level')) db.exec('ALTER TABLE key_location ADD COLUMN damage_level INTEGER')
-} catch (_) {}
-// 迁移：combat_losses 添加平民伤亡、updated_at
-try {
-  const lossCols = db.prepare('PRAGMA table_info(combat_losses)').all()
-  const lossNames = lossCols.map((c) => c.name)
-  if (!lossNames.includes('civilian_killed')) db.exec('ALTER TABLE combat_losses ADD COLUMN civilian_killed INTEGER NOT NULL DEFAULT 0')
-  if (!lossNames.includes('civilian_wounded')) db.exec('ALTER TABLE combat_losses ADD COLUMN civilian_wounded INTEGER NOT NULL DEFAULT 0')
-  if (!lossNames.includes('updated_at')) db.exec('ALTER TABLE combat_losses ADD COLUMN updated_at TEXT DEFAULT (datetime("now"))')
-  if (!lossNames.includes('drones')) db.exec('ALTER TABLE combat_losses ADD COLUMN drones INTEGER NOT NULL DEFAULT 0')
-  if (!lossNames.includes('missiles')) db.exec('ALTER TABLE combat_losses ADD COLUMN missiles INTEGER NOT NULL DEFAULT 0')
-  if (!lossNames.includes('helicopters')) db.exec('ALTER TABLE combat_losses ADD COLUMN helicopters INTEGER NOT NULL DEFAULT 0')
-  if (!lossNames.includes('submarines')) db.exec('ALTER TABLE combat_losses ADD COLUMN submarines INTEGER NOT NULL DEFAULT 0')
-  if (!lossNames.includes('tanks')) db.exec('ALTER TABLE combat_losses ADD COLUMN tanks INTEGER NOT NULL DEFAULT 0')
-  if (!lossNames.includes('carriers')) {
-    db.exec('ALTER TABLE combat_losses ADD COLUMN carriers INTEGER NOT NULL DEFAULT 0')
-    db.exec('UPDATE combat_losses SET carriers = tanks')
-  }
-  if (!lossNames.includes('civilian_ships')) db.exec('ALTER TABLE combat_losses ADD COLUMN civilian_ships INTEGER NOT NULL DEFAULT 0')
-  if (!lossNames.includes('airport_port')) db.exec('ALTER TABLE combat_losses ADD COLUMN airport_port INTEGER NOT NULL DEFAULT 0')
-} catch (_) {}
-
-// 迁移：所有表添加 updated_at 用于数据回放
-const addUpdatedAt = (table) => {
   try {
-    const cols = db.prepare(`PRAGMA table_info(${table})`).all()
-    if (!cols.some((c) => c.name === 'updated_at')) {
-      db.exec(`ALTER TABLE ${table} ADD COLUMN updated_at TEXT DEFAULT (datetime("now"))`)
-    }
+    const cols = prepare('PRAGMA table_info(key_location)').all()
+    const names = cols.map((c) => c.name)
+    if (!names.includes('type')) exec('ALTER TABLE key_location ADD COLUMN type TEXT')
+    if (!names.includes('region')) exec('ALTER TABLE key_location ADD COLUMN region TEXT')
+    if (!names.includes('status')) exec('ALTER TABLE key_location ADD COLUMN status TEXT DEFAULT "operational"')
+    if (!names.includes('damage_level')) exec('ALTER TABLE key_location ADD COLUMN damage_level INTEGER')
+  } catch (_) {}
+  try {
+    const lossCols = prepare('PRAGMA table_info(combat_losses)').all()
+    const lossNames = lossCols.map((c) => c.name)
+    if (!lossNames.includes('civilian_killed')) exec('ALTER TABLE combat_losses ADD COLUMN civilian_killed INTEGER NOT NULL DEFAULT 0')
+    if (!lossNames.includes('civilian_wounded')) exec('ALTER TABLE combat_losses ADD COLUMN civilian_wounded INTEGER NOT NULL DEFAULT 0')
+    if (!lossNames.includes('updated_at')) exec('ALTER TABLE combat_losses ADD COLUMN updated_at TEXT DEFAULT (datetime("now"))')
+    if (!lossNames.includes('drones')) exec('ALTER TABLE combat_losses ADD COLUMN drones INTEGER NOT NULL DEFAULT 0')
+    if (!lossNames.includes('missiles')) exec('ALTER TABLE combat_losses ADD COLUMN missiles INTEGER NOT NULL DEFAULT 0')
+    if (!lossNames.includes('helicopters')) exec('ALTER TABLE combat_losses ADD COLUMN helicopters INTEGER NOT NULL DEFAULT 0')
+    if (!lossNames.includes('submarines')) exec('ALTER TABLE combat_losses ADD COLUMN submarines INTEGER NOT NULL DEFAULT 0')
+    if (!lossNames.includes('tanks')) exec('ALTER TABLE combat_losses ADD COLUMN tanks INTEGER NOT NULL DEFAULT 0')
+    if (!lossNames.includes('carriers')) {
+      exec('ALTER TABLE combat_losses ADD COLUMN carriers INTEGER NOT NULL DEFAULT 0')
+      exec('UPDATE combat_losses SET carriers = tanks')
+    }
+    if (!lossNames.includes('civilian_ships')) exec('ALTER TABLE combat_losses ADD COLUMN civilian_ships INTEGER NOT NULL DEFAULT 0')
+    if (!lossNames.includes('airport_port')) exec('ALTER TABLE combat_losses ADD COLUMN airport_port INTEGER NOT NULL DEFAULT 0')
   } catch (_) {}
-}
-addUpdatedAt('force_summary')
-addUpdatedAt('power_index')
-addUpdatedAt('force_asset')
-addUpdatedAt('key_location')
-addUpdatedAt('retaliation_current')
 
-// 来访统计：visits 用于在看（近期活跃 IP），visitor_count 用于累积人次（每次接入 +1）
-try {
-  db.exec(`
+  const addUpdatedAt = (table) => {
+    try {
+      const cols = prepare(`PRAGMA table_info(${table})`).all()
+      if (!cols.some((c) => c.name === 'updated_at')) {
+        exec(`ALTER TABLE ${table} ADD COLUMN updated_at TEXT DEFAULT (datetime("now"))`)
+      }
+    } catch (_) {}
+  }
+  ;['force_summary', 'power_index', 'force_asset', 'key_location', 'retaliation_current'].forEach(addUpdatedAt)
+
+  try {
+    exec(`
     CREATE TABLE IF NOT EXISTS visits (
       ip TEXT PRIMARY KEY,
       last_seen TEXT NOT NULL DEFAULT (datetime('now'))
@@ -185,30 +213,66 @@ try {
       total INTEGER NOT NULL DEFAULT 0
     );
     INSERT OR IGNORE INTO visitor_count (id, total) VALUES (1, 0);
-  `)
-} catch (_) {}
-
-// 后台留言：供开发者收集用户反馈
-try {
-  db.exec(`
+    `)
+  } catch (_) {}
+  try {
+    exec(`
     CREATE TABLE IF NOT EXISTS feedback (
       id INTEGER PRIMARY KEY AUTOINCREMENT,
       content TEXT NOT NULL,
       ip TEXT,
       created_at TEXT NOT NULL DEFAULT (datetime('now'))
     )
-  `)
-} catch (_) {}
-
-// 分享次数：累计分享次数
-try {
-  db.exec(`
+    `)
+  } catch (_) {}
+  try {
+    exec(`
     CREATE TABLE IF NOT EXISTS share_count (
       id INTEGER PRIMARY KEY CHECK (id = 1),
       total INTEGER NOT NULL DEFAULT 0
     );
     INSERT OR IGNORE INTO share_count (id, total) VALUES (1, 0);
-  `)
-} catch (_) {}
+    `)
+  } catch (_) {}
+}
 
-module.exports = db
+async function initDb() {
+  const initSqlJs = require('sql.js')
+  const SQL = await initSqlJs()
+  let data = new Uint8Array(0)
+  if (fs.existsSync(dbPath)) {
+    data = new Uint8Array(fs.readFileSync(dbPath))
+  }
+  const nativeDb = new SQL.Database(data)
+
+  function persist() {
+    try {
+      const buf = nativeDb.export()
+      fs.writeFileSync(dbPath, Buffer.from(buf))
+    } catch (e) {
+      console.error('[db] persist error:', e.message)
+    }
+  }
+
+  nativeDb.run('PRAGMA journal_mode = WAL')
+  const wrapped = wrapDatabase(nativeDb, persist)
+  runMigrations(wrapped)
+  _db = wrapped
+  return _db
+}
+
+const proxy = {
+  prepare(sql) {
+    return getDb().prepare(sql)
+  },
+  exec(sql) {
+    return getDb().exec(sql)
+  },
+  pragma(str) {
+    getDb().pragma(str)
+  },
+}
+
+module.exports = proxy
+module.exports.initDb = initDb
+module.exports.getDb = getDb
diff --git a/server/index.js b/server/index.js
index 66350fa..b1132e9 100644
--- a/server/index.js
+++ b/server/index.js
@@ -4,6 +4,7 @@ const fs = require('fs')
 const express = require('express')
 const cors = require('cors')
 const { WebSocketServer } = require('ws')
+const db = require('./db')
 const routes = require('./routes')
 const { getSituation } = require('./situationData')
 
@@ -67,7 +68,12 @@ function notifyCrawlerUpdate() {
   } catch (_) {}
 }
 
-server.listen(PORT, () => {
-  console.log(`API + WebSocket running at http://localhost:${PORT}`)
-  console.log(`Swagger docs at http://localhost:${PORT}/api-docs`)
+db.initDb().then(() => {
+  server.listen(PORT, () => {
+    console.log(`API + WebSocket running at http://localhost:${PORT}`)
+    console.log(`Swagger docs at http://localhost:${PORT}/api-docs`)
+  })
+}).catch((err) => {
+  console.error('DB init failed:', err)
+  process.exit(1)
 })
diff --git a/server/seed.js b/server/seed.js
index e3b4a1c..2c96344 100644
--- a/server/seed.js
+++ b/server/seed.js
@@ -186,4 +186,7 @@ function seed() {
   console.log('Seed completed.')
 }
 
-seed()
+require('./db').initDb().then(() => seed()).catch((err) => {
+  console.error('Seed failed:', err)
+  process.exit(1)
+})
diff --git a/server/situationData.js b/server/situationData.js
index 92b1b5f..85b5d95 100644
--- a/server/situationData.js
+++ b/server/situationData.js
@@ -155,6 +155,8 @@ function getSituation() {
     })),
     conflictStats,
     civilianCasualtiesTotal,
+    // 顶层聚合，便于 sit.combatLosses.us / sit.combatLosses.iran 与 usForces/iranForces 内保持一致
+    combatLosses: { us: usLosses, iran: irLosses },
   }
 }