feat: site-level login recipes shared across channels

- login-tools: loadRecipe falls back to site recipe (logins/<site>.json);
  discover writes site-level recipe so nikkei-* channels share one recipe
- rename recipes to site names: nikkei.json, digitimes.json (ft.json already)

skills/news-harvester/logins/ft.json

+{
+  "checkUrl": "https://www.ft.com/news-feed",
+  "loggedOutText": "Sign In",
+  "steps": [
+    {
+      "click": {
+        "text": "Sign In"
+      }
+    },
+    {
+      "fill": {
+        "#enter-email": "$USER"
+      },
+      "submit": "button[type=submit], form input[type=submit]"
+    },
+    {
+      "fill": {
+        "input[type=password]": "$PASS"
+      },
+      "submit": "button[type=submit], form input[type=submit]",
+      "waitMs": 8000
+    }
+  ]
+}

skills/news-harvester/scripts/login-tools.js

@@ -50,10 +50,18 @@ function cdpPort() {
   return 9222;
 }
 
+function siteOf(source) {
+  // 站点 = 源名第一段:nikkei-world/markets/tech → nikkei;单段源(wsj/ft)即自身
+  return String(source).split('-')[0];
+}
+
 function loadRecipe(source) {
-  const p = path.join(ROOT, 'logins', `${source}.json`);
-  if (!fs.existsSync(p)) return null;
-  return JSON.parse(fs.readFileSync(p, 'utf8'));
+  // 先源级配方,再站点级(logins/nikkei.json 对全部 nikkei-* 频道生效)
+  for (const name of [source, siteOf(source)]) {
+    const p = path.join(ROOT, 'logins', `${name}.json`);
+    if (fs.existsSync(p)) return JSON.parse(fs.readFileSync(p, 'utf8'));
+  }
+  return null;
 }
 
 const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
@@ -264,8 +272,9 @@ async function discover(source, doLogin) {
     steps,
   };
   fs.mkdirSync(path.join(ROOT, 'logins'), { recursive: true });
-  fs.writeFileSync(path.join(ROOT, 'logins', `${source}.json`), JSON.stringify(recipe, null, 2) + '\n');
-  console.log(`⑥ 配方已写入 logins/${source}.json`);
+  // 配方写站点级(nikkei.json),同站全部频道共享;源级文件仍可手工覆盖
+  fs.writeFileSync(path.join(ROOT, 'logins', `${siteOf(source)}.json`), JSON.stringify(recipe, null, 2) + '\n');
+  console.log(`⑥ 配方已写入 logins/${siteOf(source)}.json(站点级,覆盖 ${siteOf(source)}-* 全部频道)`);
   if (!doLogin) { console.log('⑦ --no-login:跳过实登验证'); process.exit(0); }
 }