diff --git a/pyproject.toml b/pyproject.toml
index 13244b2f..10346bac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -61,6 +61,7 @@ dependencies = [
     "tomli-w",
     "aiofiles>=24.1.0",
     "aiohttp>=3.9.0",
+    "chardet>=5.0.0",
     "deepagents>=0.2.5",
     "json-repair>=0.54.0",
     "openpyxl>=3.1.5",
diff --git a/web/package.json b/web/package.json
index da1413fe..d14743be 100644
--- a/web/package.json
+++ b/web/package.json
@@ -33,6 +33,7 @@
     "markmap-view": "^0.18.12",
     "md-editor-v3": "^5.8.4",
     "pinia": "^3.0.3",
+    "pinia-plugin-persistedstate": "^4.7.1",
     "sigma": "^3.0.2",
     "vue": "^3.5.21",
     "vue-router": "^4.5.1"
diff --git a/web/pnpm-lock.yaml b/web/pnpm-lock.yaml
index 0d26237d..6bb64cdd 100644
--- a/web/pnpm-lock.yaml
+++ b/web/pnpm-lock.yaml
@@ -71,6 +71,9 @@ importers:
       pinia:
         specifier: ^3.0.3
         version: 3.0.3(vue@3.5.21)
+      pinia-plugin-persistedstate:
+        specifier: ^4.7.1
+        version: 4.7.1(pinia@3.0.3(vue@3.5.21))
       sigma:
         specifier: ^3.0.2
         version: 3.0.2(graphology-types@0.24.8)
@@ -1294,6 +1297,9 @@ packages:
   deep-is@0.1.4:
     resolution: {integrity: sha512-oIPzksmTg4/MriiaYGO+okXDT7ztn/w3Eptv/+gSIdMdKsJo0u4CfYNFJPy+4SKMuCqGw2wxnA+URMg3t8a/bQ==}
 
+  defu@6.1.4:
+    resolution: {integrity: sha512-mEQCMmwJu317oSz8CwdIOdwf3xMif1ttiM8LTufzc3g6kR+9Pe236twL8j3IYT1F7GfRgGcW6MWxzZjLIkuHIg==}
+
   delaunator@5.0.1:
     resolution: {integrity: sha512-8nvh+XBe96aCESrGOqMp/84b13H9cdKbG5P2ejQCh4d4sK9RL4371qou9drQjMhvnPmhWl5hnmqbEE0fXr9Xnw==}
 
@@ -1909,6 +1915,20 @@ packages:
     resolution: {integrity: sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==}
     engines: {node: '>=6'}
 
+  pinia-plugin-persistedstate@4.7.1:
+    resolution: {integrity: sha512-WHOqh2esDlR3eAaknPbqXrkkj0D24h8shrDPqysgCFR6ghqP/fpFfJmMPJp0gETHsvrh9YNNg6dQfo2OEtDnIQ==}
+    peerDependencies:
+      '@nuxt/kit': '>=3.0.0'
+      '@pinia/nuxt': '>=0.10.0'
+      pinia: '>=3.0.0'
+    peerDependenciesMeta:
+      '@nuxt/kit':
+        optional: true
+      '@pinia/nuxt':
+        optional: true
+      pinia:
+        optional: true
+
   pinia@3.0.3:
     resolution: {integrity: sha512-ttXO/InUULUXkMHpTdp9Fj4hLpD/2AoJdmAbAeW2yu1iy1k+pkFekQXw5VpC0/5p51IOR/jDaDRfRWRnMMsGOA==}
     peerDependencies:
@@ -3781,6 +3801,8 @@ snapshots:
 
   deep-is@0.1.4: {}
 
+  defu@6.1.4: {}
+
   delaunator@5.0.1:
     dependencies:
       robust-predicates: 3.0.2
@@ -4428,6 +4450,12 @@ snapshots:
   pify@4.0.1:
     optional: true
 
+  pinia-plugin-persistedstate@4.7.1(pinia@3.0.3(vue@3.5.21)):
+    dependencies:
+      defu: 6.1.4
+    optionalDependencies:
+      pinia: 3.0.3(vue@3.5.21)
+
   pinia@3.0.3(vue@3.5.21):
     dependencies:
       '@vue/devtools-api': 7.7.7
diff --git a/web/src/main.js b/web/src/main.js
index 753db609..d993c4fc 100644
--- a/web/src/main.js
+++ b/web/src/main.js
@@ -1,5 +1,6 @@
 import { createApp } from 'vue'
 import { createPinia } from 'pinia'
+import piniaPluginPersistedstate from 'pinia-plugin-persistedstate'
 
 import App from './App.vue'
 import router from './router'
@@ -10,6 +11,7 @@ import '@/assets/css/main.css'
 
 const app = createApp(App)
 const pinia = createPinia()
+pinia.use(piniaPluginPersistedstate)
 
 app.use(pinia)
 app.use(router)
diff --git a/web/src/stores/agent.js b/web/src/stores/agent.js
index 3e55469e..597cad82 100644
--- a/web/src/stores/agent.js
+++ b/web/src/stores/agent.js
@@ -87,8 +87,8 @@ export const useAgentStore = defineStore('agent', () => {
       await fetchAgents()
       await fetchDefaultAgent()
 
-      if (!selectedAgentId.value || !agents.value.find(a => a.id === selectedAgentId.value)) {
-        if (defaultAgentId.value && agents.value.find(a => a.id === defaultAgentId.value)) {
+      if (!selectedAgent.value) {
+        if (defaultAgent.value) {
           await selectAgent(defaultAgentId.value)
         } else if (agents.value.length > 0) {
           const firstAgentId = agents.value[0].id
@@ -356,6 +356,6 @@ export const useAgentStore = defineStore('agent', () => {
   persist: {
     key: 'agent-store',
     storage: localStorage,
-    paths: ['selectedAgentId', 'defaultAgentId']
+    pick: ['selectedAgentId']
   }
 })