fix: 修复 QQ Bot 配置后 Gateway 无法启动的问题

1. 清除旧版 "agent" 废弃键 — 保存 channel 配置时自动删除旧的 agent 键，
   防止 OpenClaw 报 "agent.* was moved" 错误（前端 + 服务端双重防御）
2. Dashboard URL 动态端口探测 — 将硬编码 18789 改为扫描 18789-18799，
   解决端口被占用时打不开 Dashboard 的问题
3. 安装脚本配置格式升级 — install.sh / install.ps1 / install-silent.ps1
   生成的 openclaw.json 从旧的 "agent" 格式迁移到 "agents.defaults.model.primary"
4. 文档示例同步更新 — CLAUDE.md / cloud.html / guide.html 中的配置示例

影响文件: 14 个（portable/, install/, website/, u-claw-app/, usb-release/）

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

portable/config-server/public/index.html

@@ -642,6 +642,8 @@ async function saveChannelsAndOpen() {
         try {
             var res = await fetch('/api/config');
             var existing = res.ok ? await res.json() : {};
+            // 清除旧版废弃键，防止 OpenClaw 报 "agent.* was moved" 错误
+            delete existing.agent;
             existing.channels = Object.assign(existing.channels || {}, channels);
             await fetch('/api/config', {
                 method: 'POST',
@@ -652,7 +654,7 @@ async function saveChannelsAndOpen() {
         } catch(e) {}
     }
 
-    window.open('http://127.0.0.1:18789/#token=uclaw', '_blank');
+    window.open(gatewayUrl(), '_blank');
 }
 
 // --- View config ---
@@ -677,15 +679,35 @@ function showToast(msg, isError) {
     setTimeout(function() { t.className = 'toast'; }, 3000);
 }
 
+// --- Find active gateway port (18789-18799) ---
+var _gatewayPort = null;
+async function findGatewayPort() {
+    for (var p = 18789; p <= 18799; p++) {
+        try {
+            await fetch('http://127.0.0.1:' + p + '/', { mode: 'no-cors' });
+            _gatewayPort = p;
+            return p;
+        } catch(e) {}
+    }
+    _gatewayPort = null;
+    return null;
+}
+
+function gatewayUrl() {
+    var p = _gatewayPort || 18789;
+    return 'http://127.0.0.1:' + p + '/#token=uclaw';
+}
+
 // --- Check gateway status ---
 async function checkGateway() {
     var dot = document.getElementById('statusDot');
     var text = document.getElementById('statusText');
-    try {
-        await fetch('http://127.0.0.1:18789/', { mode: 'no-cors' });
+    var port = await findGatewayPort();
+    if (port) {
         dot.className = 'dot on';
-        text.innerHTML = 'Gateway 运行中 · <a href="http://127.0.0.1:18789/#token=uclaw" target="_blank">打开 Dashboard →</a>';
-    } catch(e) {
+        text.innerHTML = 'Gateway 运行中 (端口 ' + port + ') · <a href="' + gatewayUrl() + '" target="_blank">打开 Dashboard →</a>';
+        document.getElementById('gatewayUrl').textContent = 'http://127.0.0.1:' + port;
+    } else {
         dot.className = 'dot off';
         text.innerHTML = 'Gateway 未启动 · 请先运行 Windows-Start.bat 或 Mac-Start.command';
     }

portable/config-server/server.js

@@ -398,6 +398,8 @@ const server = http.createServer((req, res) => {
     req.on('end', () => {
       try {
         const config = JSON.parse(body);
+        // 清除旧版废弃键，防止 OpenClaw 报 "agent.* was moved" 错误
+        delete config.agent;
         const dir = path.dirname(CONFIG_PATH);
         if (!fs.existsSync(dir)) fs.mkdirSync(dir, { recursive: true });
         fs.writeFileSync(CONFIG_PATH, JSON.stringify(config, null, 2));