diff --git a/src/components/sidebar.js b/src/components/sidebar.js
index dce259e..d3cf25c 100644
--- a/src/components/sidebar.js
+++ b/src/components/sidebar.js
@@ -43,6 +43,8 @@ const ICONS = {
   deploy: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M22 11.08V12a10 10 0 11-5.93-9.14"/><polyline points="22 4 12 14.01 9 11.01"/></svg>',
 }
 
+let _delegated = false
+
 export function renderSidebar(el) {
   const current = getCurrentRoute()
 
@@ -86,14 +88,22 @@ export function renderSidebar(el) {
 
   el.innerHTML = html
 
-  // 绑定导航点击事件
-  el.querySelectorAll('.nav-item[data-route]').forEach(item => {
-    item.onclick = () => navigate(item.dataset.route)
-  })
-
-  // 主题切换
-  el.querySelector('#btn-theme-toggle')?.addEventListener('click', () => {
-    toggleTheme()
-    renderSidebar(el)
-  })
+  // 事件委托：只绑定一次，避免重复绑定
+  if (!_delegated) {
+    _delegated = true
+    el.addEventListener('click', (e) => {
+      // 导航点击
+      const navItem = e.target.closest('.nav-item[data-route]')
+      if (navItem) {
+        navigate(navItem.dataset.route)
+        return
+      }
+      // 主题切换
+      const themeBtn = e.target.closest('#btn-theme-toggle')
+      if (themeBtn) {
+        toggleTheme()
+        renderSidebar(el)
+      }
+    })
+  }
 }
diff --git a/src/pages/agents.js b/src/pages/agents.js
index b3dd8ed..2397dcd 100644
--- a/src/pages/agents.js
+++ b/src/pages/agents.js
@@ -22,7 +22,17 @@ export async function render() {
   const state = { config: null }
   await loadConfig(page, state)
 
-  page.querySelector('#btn-save-agent').onclick = () => saveConfig(page, state)
+  page.querySelector('#btn-save-agent').onclick = async () => {
+    const btn = page.querySelector('#btn-save-agent')
+    btn.disabled = true
+    btn.textContent = '保存中...'
+    try {
+      await saveConfig(page, state)
+    } finally {
+      btn.disabled = false
+      btn.textContent = '保存配置'
+    }
+  }
   return page
 }
 
diff --git a/src/pages/gateway.js b/src/pages/gateway.js
index b477abe..33fae78 100644
--- a/src/pages/gateway.js
+++ b/src/pages/gateway.js
@@ -21,7 +21,17 @@ export async function render() {
 
   const state = { config: null }
   await loadConfig(page, state)
-  page.querySelector('#btn-save-gw').onclick = () => saveConfig(page, state)
+  page.querySelector('#btn-save-gw').onclick = async () => {
+    const btn = page.querySelector('#btn-save-gw')
+    btn.disabled = true
+    btn.textContent = '保存中...'
+    try {
+      await saveConfig(page, state)
+    } finally {
+      btn.disabled = false
+      btn.textContent = '保存配置'
+    }
+  }
   return page
 }
 
diff --git a/src/pages/logs.js b/src/pages/logs.js
index 5105ee4..a77af40 100644
--- a/src/pages/logs.js
+++ b/src/pages/logs.js
@@ -12,6 +12,8 @@ const LOG_TABS = [
   { key: 'config-audit', label: '审计日志' },
 ]
 
+let _searchTimer = null
+
 export async function render() {
   const page = document.createElement('div')
   page.className = 'page'
@@ -48,10 +50,9 @@ export async function render() {
   })
 
   // 搜索
-  let searchTimer = null
   page.querySelector('#log-search').addEventListener('input', (e) => {
-    clearTimeout(searchTimer)
-    searchTimer = setTimeout(() => {
+    clearTimeout(_searchTimer)
+    _searchTimer = setTimeout(() => {
       if (e.target.value.trim()) {
         searchLog(page, currentTab, e.target.value.trim())
       } else {
@@ -67,6 +68,11 @@ export async function render() {
   return page
 }
 
+export function cleanup() {
+  clearTimeout(_searchTimer)
+  _searchTimer = null
+}
+
 async function loadLog(page, logName) {
   const el = page.querySelector('#log-content')
   el.innerHTML = '<div style="color:var(--text-tertiary)">加载中...</div>'
diff --git a/src/pages/mcp.js b/src/pages/mcp.js
index ba5cfb9..6aeb5b6 100644
--- a/src/pages/mcp.js
+++ b/src/pages/mcp.js
@@ -24,7 +24,17 @@ export async function render() {
   const state = { config: null }
   await loadConfig(page, state)
 
-  page.querySelector('#btn-save-mcp').onclick = () => saveConfig(state)
+  page.querySelector('#btn-save-mcp').onclick = async () => {
+    const btn = page.querySelector('#btn-save-mcp')
+    btn.disabled = true
+    btn.textContent = '保存中...'
+    try {
+      await saveConfig(state)
+    } finally {
+      btn.disabled = false
+      btn.textContent = '保存配置'
+    }
+  }
   page.querySelector('#btn-add-mcp').onclick = () => addServer(page, state)
   return page
 }
diff --git a/src/pages/models.js b/src/pages/models.js
index 93fa1aa..5dc06c5 100644
--- a/src/pages/models.js
+++ b/src/pages/models.js
@@ -24,7 +24,17 @@ export async function render() {
   const state = { config: null }
   await loadConfig(page, state)
 
-  page.querySelector('#btn-save-models').onclick = () => saveConfig(state)
+  page.querySelector('#btn-save-models').onclick = async () => {
+    const btn = page.querySelector('#btn-save-models')
+    btn.disabled = true
+    btn.textContent = '保存中...'
+    try {
+      await saveConfig(state)
+    } finally {
+      btn.disabled = false
+      btn.textContent = '保存配置'
+    }
+  }
   page.querySelector('#btn-add-provider').onclick = () => addProvider(page, state)
 
   return page
diff --git a/src/router.js b/src/router.js
index af34f2d..81fa514 100644
--- a/src/router.js
+++ b/src/router.js
@@ -5,6 +5,7 @@ const routes = {}
 let _contentEl = null
 let _loadId = 0
 let _currentCleanup = null
+let _initialized = false
 
 export function registerRoute(path, loader) {
   routes[path] = loader
@@ -16,7 +17,10 @@ export function navigate(path) {
 
 export function initRouter(contentEl) {
   _contentEl = contentEl
-  window.addEventListener('hashchange', () => loadRoute())
+  if (!_initialized) {
+    window.addEventListener('hashchange', () => loadRoute())
+    _initialized = true
+  }
   loadRoute()
 }