diff --git a/portable/config-server/server.js b/portable/config-server/server.js
index 812c488..15232e4 100644
--- a/portable/config-server/server.js
+++ b/portable/config-server/server.js
@@ -5,8 +5,10 @@ const path = require('path');
 const { deflateSync } = require('zlib');
 const crypto = require('crypto');
 
-const PORT = 18788;
+const PORT_RANGE_START = 18788;
+const PORT_RANGE_END = 18798;
 const CONFIG_PATH = path.join(__dirname, '../data/.openclaw/openclaw.json');
+const RUNTIME_PATH = path.join(__dirname, '../data/.openclaw/runtime.json');
 
 // ── WeChat Login State ──────────────────────────────────────────────────────
 const DEFAULT_WECHAT_BASE_URL = 'https://ilinkai.weixin.qq.com';
@@ -500,8 +502,31 @@ const server = http.createServer((req, res) => {
   }
 });
 
-server.listen(PORT, '127.0.0.1', () => {
-  console.log(`\n🦞 U-Claw Config Center`);
-  console.log(`   http://127.0.0.1:${PORT}`);
-  console.log(`\n   Config file: ${CONFIG_PATH}\n`);
-});
+function listenWithFallback(port) {
+  server.once('error', (err) => {
+    if (err && err.code === 'EADDRINUSE' && port < PORT_RANGE_END) {
+      console.log(`   Port ${port} busy, trying ${port + 1}…`);
+      setImmediate(() => listenWithFallback(port + 1));
+      return;
+    }
+    console.error(`Config server failed to bind: ${err && err.message ? err.message : err}`);
+    process.exit(1);
+  });
+  server.listen(port, '127.0.0.1', () => {
+    console.log(`\n🦞 U-Claw Config Center`);
+    console.log(`   http://127.0.0.1:${port}`);
+    console.log(`\n   Config file: ${CONFIG_PATH}\n`);
+    // Persist the live port so Config.html / launchers can discover it after restarts.
+    try {
+      fs.mkdirSync(path.dirname(RUNTIME_PATH), { recursive: true });
+      const existing = fs.existsSync(RUNTIME_PATH) ? JSON.parse(fs.readFileSync(RUNTIME_PATH, 'utf8')) : {};
+      existing.configServerPort = port;
+      existing.configServerUpdatedAt = new Date().toISOString();
+      fs.writeFileSync(RUNTIME_PATH, JSON.stringify(existing, null, 2));
+    } catch (err) {
+      console.warn(`   Warning: could not write ${RUNTIME_PATH}: ${err.message}`);
+    }
+  });
+}
+
+listenWithFallback(PORT_RANGE_START);
diff --git a/portable/lib/bootstrap-xiapan.mjs b/portable/lib/bootstrap-xiapan.mjs
index 942d61c..3d07edd 100644
--- a/portable/lib/bootstrap-xiapan.mjs
+++ b/portable/lib/bootstrap-xiapan.mjs
@@ -12,16 +12,23 @@ import { buildApiKey } from './xiapan-client.mjs';
 
 const PROVIDER_ID = 'uclaw-cloud';
 
+// Mirror ClawX commercial schema: keep models[] empty and steer model selection
+// via agents.defaults.model.primary + fallbacks. OpenClaw 2026.4.x accepts both
+// shapes, but the empty-models form lets the runtime auto-discover model ids
+// from /v1/models without us hard-coding a list that drifts from the backend.
 const DEFAULT_PROVIDER_TEMPLATE = {
   baseUrl: 'https://api.u-claw.org/v1',
   api: 'openai-completions',
-  models: [
-    { id: 'deepseek-chat', name: 'DeepSeek Chat' },
-    { id: 'qwen-plus', name: 'Qwen Plus' },
-    { id: 'qwen-turbo', name: 'Qwen Turbo' },
-  ],
+  models: [],
 };
 
+const DEFAULT_PRIMARY_MODEL = `${PROVIDER_ID}/deepseek-v4-flash`;
+const DEFAULT_FALLBACK_MODELS = [
+  `${PROVIDER_ID}/deepseek-chat`,
+  `${PROVIDER_ID}/qwen-plus`,
+  `${PROVIDER_ID}/qwen-turbo`,
+];
+
 function readJsonSafe(filePath) {
   if (!existsSync(filePath)) return null;
   try {
@@ -48,6 +55,32 @@ function ensureModelsContainer(config) {
   return config.models.providers;
 }
 
+// Set agents.defaults.model.primary to uclaw-cloud only when the user has not
+// configured a primary model already. If they've picked a different provider
+// (e.g. DeepSeek BYOK), leave their choice untouched.
+function ensureAgentsDefaults(config) {
+  if (!config.agents || typeof config.agents !== 'object') {
+    config.agents = {};
+  }
+  if (!config.agents.defaults || typeof config.agents.defaults !== 'object') {
+    config.agents.defaults = {};
+  }
+  const defaults = config.agents.defaults;
+  if (!defaults.model || typeof defaults.model !== 'object') {
+    defaults.model = {};
+  }
+  let changed = false;
+  if (!defaults.model.primary) {
+    defaults.model.primary = DEFAULT_PRIMARY_MODEL;
+    changed = true;
+  }
+  if (!Array.isArray(defaults.model.fallbacks) || defaults.model.fallbacks.length === 0) {
+    defaults.model.fallbacks = [...DEFAULT_FALLBACK_MODELS];
+    changed = true;
+  }
+  return changed;
+}
+
 export async function bootstrapXiapan({ configPath, appRoot, log = console } = {}) {
   if (!configPath) {
     throw new Error('bootstrapXiapan: configPath is required.');
@@ -74,6 +107,9 @@ export async function bootstrapXiapan({ configPath, appRoot, log = console } = {
         `[bootstrap-xiapan] uclaw-cloud apiKey already configured (different fingerprint). `
         + `Current source=${fingerprintInfo.source}. Use Config UI to rebind if needed.`,
       );
+      // Still ensure agents.defaults exists so the runtime knows to use uclaw-cloud
+      const changedDefaults = ensureAgentsDefaults(config);
+      if (changedDefaults) writeJson(configPath, config);
       return {
         ok: true,
         action: 'kept',
@@ -82,9 +118,14 @@ export async function bootstrapXiapan({ configPath, appRoot, log = console } = {
       };
     }
     if (existing.apiKey === apiKey) {
+      const changedDefaults = ensureAgentsDefaults(config);
+      if (changedDefaults) {
+        writeJson(configPath, config);
+        log.info?.('[bootstrap-xiapan] Added agents.defaults to existing config');
+      }
       return {
         ok: true,
-        action: 'noop',
+        action: changedDefaults ? 'agents-defaults-added' : 'noop',
         source: fingerprintInfo.source,
         apiKey,
       };
@@ -97,8 +138,9 @@ export async function bootstrapXiapan({ configPath, appRoot, log = console } = {
     baseUrl: existing?.baseUrl || DEFAULT_PROVIDER_TEMPLATE.baseUrl,
     api: existing?.api || DEFAULT_PROVIDER_TEMPLATE.api,
     apiKey,
-    models: existing?.models?.length ? existing.models : DEFAULT_PROVIDER_TEMPLATE.models,
+    models: existing?.models ?? DEFAULT_PROVIDER_TEMPLATE.models,
   };
+  ensureAgentsDefaults(config);
 
   writeJson(configPath, config);
   log.info?.(
diff --git a/u-claw-app/package.json b/u-claw-app/package.json
index bcf45b7..b90911d 100644
--- a/u-claw-app/package.json
+++ b/u-claw-app/package.json
@@ -1,6 +1,6 @@
 {
   "name": "u-claw",
-  "version": "2.0.0",
+  "version": "2.1.2",
   "description": "U-Claw - AI 助手桌面版，插上 U 盘就能用",
   "main": "src/main.js",
   "author": "U-Claw <hello@u-claw.org> (https://u-claw.org)",
diff --git a/u-claw-app/src/lib/bootstrap-xiapan.mjs b/u-claw-app/src/lib/bootstrap-xiapan.mjs
index 942d61c..3d07edd 100644
--- a/u-claw-app/src/lib/bootstrap-xiapan.mjs
+++ b/u-claw-app/src/lib/bootstrap-xiapan.mjs
@@ -12,16 +12,23 @@ import { buildApiKey } from './xiapan-client.mjs';
 
 const PROVIDER_ID = 'uclaw-cloud';
 
+// Mirror ClawX commercial schema: keep models[] empty and steer model selection
+// via agents.defaults.model.primary + fallbacks. OpenClaw 2026.4.x accepts both
+// shapes, but the empty-models form lets the runtime auto-discover model ids
+// from /v1/models without us hard-coding a list that drifts from the backend.
 const DEFAULT_PROVIDER_TEMPLATE = {
   baseUrl: 'https://api.u-claw.org/v1',
   api: 'openai-completions',
-  models: [
-    { id: 'deepseek-chat', name: 'DeepSeek Chat' },
-    { id: 'qwen-plus', name: 'Qwen Plus' },
-    { id: 'qwen-turbo', name: 'Qwen Turbo' },
-  ],
+  models: [],
 };
 
+const DEFAULT_PRIMARY_MODEL = `${PROVIDER_ID}/deepseek-v4-flash`;
+const DEFAULT_FALLBACK_MODELS = [
+  `${PROVIDER_ID}/deepseek-chat`,
+  `${PROVIDER_ID}/qwen-plus`,
+  `${PROVIDER_ID}/qwen-turbo`,
+];
+
 function readJsonSafe(filePath) {
   if (!existsSync(filePath)) return null;
   try {
@@ -48,6 +55,32 @@ function ensureModelsContainer(config) {
   return config.models.providers;
 }
 
+// Set agents.defaults.model.primary to uclaw-cloud only when the user has not
+// configured a primary model already. If they've picked a different provider
+// (e.g. DeepSeek BYOK), leave their choice untouched.
+function ensureAgentsDefaults(config) {
+  if (!config.agents || typeof config.agents !== 'object') {
+    config.agents = {};
+  }
+  if (!config.agents.defaults || typeof config.agents.defaults !== 'object') {
+    config.agents.defaults = {};
+  }
+  const defaults = config.agents.defaults;
+  if (!defaults.model || typeof defaults.model !== 'object') {
+    defaults.model = {};
+  }
+  let changed = false;
+  if (!defaults.model.primary) {
+    defaults.model.primary = DEFAULT_PRIMARY_MODEL;
+    changed = true;
+  }
+  if (!Array.isArray(defaults.model.fallbacks) || defaults.model.fallbacks.length === 0) {
+    defaults.model.fallbacks = [...DEFAULT_FALLBACK_MODELS];
+    changed = true;
+  }
+  return changed;
+}
+
 export async function bootstrapXiapan({ configPath, appRoot, log = console } = {}) {
   if (!configPath) {
     throw new Error('bootstrapXiapan: configPath is required.');
@@ -74,6 +107,9 @@ export async function bootstrapXiapan({ configPath, appRoot, log = console } = {
         `[bootstrap-xiapan] uclaw-cloud apiKey already configured (different fingerprint). `
         + `Current source=${fingerprintInfo.source}. Use Config UI to rebind if needed.`,
       );
+      // Still ensure agents.defaults exists so the runtime knows to use uclaw-cloud
+      const changedDefaults = ensureAgentsDefaults(config);
+      if (changedDefaults) writeJson(configPath, config);
       return {
         ok: true,
         action: 'kept',
@@ -82,9 +118,14 @@ export async function bootstrapXiapan({ configPath, appRoot, log = console } = {
       };
     }
     if (existing.apiKey === apiKey) {
+      const changedDefaults = ensureAgentsDefaults(config);
+      if (changedDefaults) {
+        writeJson(configPath, config);
+        log.info?.('[bootstrap-xiapan] Added agents.defaults to existing config');
+      }
       return {
         ok: true,
-        action: 'noop',
+        action: changedDefaults ? 'agents-defaults-added' : 'noop',
         source: fingerprintInfo.source,
         apiKey,
       };
@@ -97,8 +138,9 @@ export async function bootstrapXiapan({ configPath, appRoot, log = console } = {
     baseUrl: existing?.baseUrl || DEFAULT_PROVIDER_TEMPLATE.baseUrl,
     api: existing?.api || DEFAULT_PROVIDER_TEMPLATE.api,
     apiKey,
-    models: existing?.models?.length ? existing.models : DEFAULT_PROVIDER_TEMPLATE.models,
+    models: existing?.models ?? DEFAULT_PROVIDER_TEMPLATE.models,
   };
+  ensureAgentsDefaults(config);
 
   writeJson(configPath, config);
   log.info?.(