feat: 填充初始国家节点数据与基础词库

data/keywords/kw_JP.txt

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+東京 天気 明日
+新宿 おすすめ 居酒屋
+最新のニュース 速報
+ゴールド 相場 チャート
+近くの静かなカフェ
+地震 速報
+円安 影響 生活

data/keywords/kw_US.txt

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+Los Angeles weather today
+S&P 500 stock chart
+local coffee shops near me
+latest tech news
+California traffic updates
+AI startups in Silicon Valley

data/regions/JP.json

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+{
+  "region_code": "JP",
+  "region_name": "日本 (东京)",
+  "google_module": {
+    "base_lat": 35.6895,
+    "base_lon": 139.6917,
+    "lang_params": "hl=ja&gl=jp&ceid=JP:ja",
+    "valid_url_suffix": "google.co.jp"
+  }
+}

data/regions/US.json

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+{
+  "region_code": "US",
+  "region_name": "美国 (美西洛杉矶)",
+  "google_module": {
+    "base_lat": 34.0522,
+    "base_lon": -118.2437,
+    "lang_params": "hl=en&gl=us&ceid=US:en",
+    "valid_url_suffix": "google.com"
+  }
+}

data/user_agents.txt

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+Mozilla/5.0 (Linux; Android 14; Pixel 8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Mobile Safari/537.36
+Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Mobile/15E148 Safari/604.1
+Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
+Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36