diff --git a/flomo-ai/app/src/main/java/com/example/flomo_ai/MainActivity.kt b/flomo-ai/app/src/main/java/com/example/flomo_ai/MainActivity.kt
index 89b797b..de16ae5 100644
--- a/flomo-ai/app/src/main/java/com/example/flomo_ai/MainActivity.kt
+++ b/flomo-ai/app/src/main/java/com/example/flomo_ai/MainActivity.kt
@@ -40,17 +40,20 @@ class MainActivity : AppCompatActivity() {
     private lateinit var promptSelector: Spinner
     private lateinit var promptNameText: TextView
     private lateinit var promptContentText: TextView
+    private lateinit var headerModelSelector: Spinner
     
     // Data classes matching SecondActivity
     data class HeaderConfig(val key: String, val value: String)
     data class PromptConfig(val id: String, val title: String, val content: String, val expanded: Boolean = false)
     data class ButtonConfig(val id: String, val label: String, val action: String, val apiUrl: String? = null, val apiMethod: String? = null, val apiBodyTemplate: String? = null, val expanded: Boolean = false)
-    data class LLMConfig(val baseUrl: String, val apiKey: String, val model: String)
+    data class LLMConfig(val name: String, val baseUrl: String, val apiKey: String, val model: String)
     data class SettingsData(
-        val llmConfig: LLMConfig?,
+        val llmConfigs: List<LLMConfig>?,
+        val selectedLlmIndex: Int?,
         val headerConfigs: List<HeaderConfig>?,
         val promptConfigs: List<PromptConfig>?,
-        val buttonConfigs: List<ButtonConfig>?
+        val buttonConfigs: List<ButtonConfig>?,
+        val llmConfig: LLMConfig? = null
     )
 
     @SuppressLint("MissingInflatedId", "CutPasteId", "SetTextI18n")
@@ -71,12 +74,11 @@ class MainActivity : AppCompatActivity() {
         outputTextView = findViewById<EditText>(R.id.outputTextView)
         val btnCopyResult = findViewById<Button>(R.id.btnCopyResult)
         val headerTitle = findViewById<TextView>(R.id.headerTitle)
-        val headerModelName = findViewById<TextView>(R.id.headerModelName)
+        headerModelSelector = findViewById<Spinner>(R.id.headerModelSelector)
         Log.d("MainActivity", "onCreate: Views initialized")
 
         headerTitle.text = "AI优化"
-        val savedModel = loadModelFromConfig()
-        headerModelName.text = if (savedModel.isNotBlank()) savedModel else "GPT-4o"
+        loadModelsFromConfig()
 
         // Initialize quick action buttons
         initQuickButtons()
@@ -129,21 +131,10 @@ class MainActivity : AppCompatActivity() {
                 
                 CoroutineScope(Dispatchers.IO).launch {
                     try {
-                        val sharedPrefs = getSharedPreferences("APIConfigs", Context.MODE_PRIVATE)
-                        val json = sharedPrefs.getString("configs", null)
-                        
-                        var baseUrl = "https://open.bigmodel.cn/api/paas/v4"
-                        var apiKey = ""
-                        var model = "glm-4.7-flash"
-                        
-                        if (json != null) {
-                            val settings = Gson().fromJson(json, SettingsData::class.java)
-                            settings.llmConfig?.let {
-                                if (it.baseUrl.isNotBlank()) baseUrl = it.baseUrl
-                                if (it.apiKey.isNotBlank()) apiKey = it.apiKey
-                                if (it.model.isNotBlank()) model = it.model
-                            }
-                        }
+                        val llmConfig = getSelectedModelConfig()
+                        val baseUrl = llmConfig.baseUrl.ifEmpty { "https://open.bigmodel.cn/api/paas/v4" }
+                        val apiKey = llmConfig.apiKey
+                        val model = llmConfig.model.ifEmpty { "glm-4.7-flash" }
                         
                         val messagesJson = JSONArray().apply {
                             put(JSONObject().apply {
@@ -261,22 +252,110 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
-    private fun loadModelFromConfig(): String {
-        return try {
+    private fun loadModelsFromConfig() {
+        try {
             val sharedPrefs = getSharedPreferences("APIConfigs", Context.MODE_PRIVATE)
             val json = sharedPrefs.getString("configs", null)
+            
+            var models = mutableListOf<LLMConfig>()
+            var selectedIndex = 0
+            
             if (json != null) {
-                val settings = Gson().fromJson(json, SettingsData::class.java)
-                settings.llmConfig?.model?.takeIf { it.isNotBlank() } ?: ""
-            } else {
-                ""
+                try {
+                    val settings = Gson().fromJson(json, SettingsData::class.java)
+                    models = settings.llmConfigs?.toMutableList() ?: mutableListOf()
+                    selectedIndex = settings.selectedLlmIndex ?: 0
+                    
+                    if (models.isEmpty()) {
+                        settings.llmConfig?.let { legacy ->
+                            models.add(LLMConfig(
+                                name = "默认配置",
+                                baseUrl = legacy.baseUrl,
+                                apiKey = legacy.apiKey,
+                                model = legacy.model
+                            ))
+                        }
+                    }
+                } catch (e: Exception) {
+                    Log.e("MainActivity", "Error parsing settings, using defaults", e)
+                }
             }
+            
+            if (models.isEmpty()) {
+                models.add(LLMConfig(
+                    name = "默认配置",
+                    baseUrl = "https://open.bigmodel.cn/api/paas/v4",
+                    apiKey = "",
+                    model = "glm-4.7-flash"
+                ))
+            }
+            
+            if (selectedIndex >= models.size) {
+                selectedIndex = 0
+            }
+            
+            val names = models.map { it.name.ifEmpty { "未命名" } }
+            val adapter = ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, names)
+            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
+            headerModelSelector.adapter = adapter
+            headerModelSelector.setSelection(selectedIndex)
+            
+            headerModelSelector.onItemSelectedListener = object : android.widget.AdapterView.OnItemSelectedListener {
+                override fun onItemSelected(parent: android.widget.AdapterView<*>, view: android.view.View?, position: Int, id: Long) {
+                    Log.d("MainActivity", "Model selected: ${models[position].name}")
+                }
+                override fun onNothingSelected(parent: android.widget.AdapterView<*>) {}
+            }
+            
+            Log.d("MainActivity", "Loaded ${models.size} model configs")
         } catch (e: Exception) {
-            Log.e("MainActivity", "Error loading model from config", e)
-            ""
+            Log.e("MainActivity", "Error loading models from config", e)
         }
     }
 
+    private fun getSelectedModelConfig(): LLMConfig {
+        val sharedPrefs = getSharedPreferences("APIConfigs", Context.MODE_PRIVATE)
+        val json = sharedPrefs.getString("configs", null)
+        
+        var models = mutableListOf<LLMConfig>()
+        var selectedIndex = headerModelSelector.selectedItemPosition
+        
+        if (json != null) {
+            try {
+                val settings = Gson().fromJson(json, SettingsData::class.java)
+                models = settings.llmConfigs?.toMutableList() ?: mutableListOf()
+                
+                if (models.isEmpty()) {
+                    settings.llmConfig?.let { legacy ->
+                        models.add(LLMConfig(
+                            name = "默认配置",
+                            baseUrl = legacy.baseUrl,
+                            apiKey = legacy.apiKey,
+                            model = legacy.model
+                        ))
+                    }
+                }
+            } catch (e: Exception) {
+                Log.e("MainActivity", "Error parsing settings", e)
+            }
+        }
+        
+        if (models.isEmpty()) {
+            return LLMConfig(
+                name = "默认配置",
+                baseUrl = "https://open.bigmodel.cn/api/paas/v4",
+                apiKey = "",
+                model = "glm-4.7-flash"
+            )
+        }
+        
+        if (selectedIndex >= models.size) {
+            selectedIndex = 0
+        }
+        
+        return models[selectedIndex]
+    }
+
     private fun loadPromptsFromConfig() {
         Log.d("MainActivity", "loadPromptsFromConfig: Starting")
         try {
diff --git a/flomo-ai/app/src/main/java/com/example/flomo_ai/SecondActivity.kt b/flomo-ai/app/src/main/java/com/example/flomo_ai/SecondActivity.kt
index f36edc6..fe776f5 100644
--- a/flomo-ai/app/src/main/java/com/example/flomo_ai/SecondActivity.kt
+++ b/flomo-ai/app/src/main/java/com/example/flomo_ai/SecondActivity.kt
@@ -46,10 +46,14 @@ data class ButtonConfig(val id: String, val label: String, val action: String, v
 class SecondActivity : AppCompatActivity() {
 
     // View references
+    private lateinit var spModelSelector: Spinner
+    private lateinit var llModelList: LinearLayout
+    private lateinit var btnAddModel: Button
     private lateinit var etBaseUrl: EditText
     private lateinit var etApiKey: EditText
     private lateinit var btnToggleApiKey: ImageButton
     private lateinit var etModel: EditText
+    private lateinit var etModelName: EditText
     private lateinit var btnTestConnection: Button
     private lateinit var tvTestStatus: TextView
     private lateinit var llHeadersList: LinearLayout
@@ -78,6 +82,8 @@ class SecondActivity : AppCompatActivity() {
     private lateinit var btnToggleNoteApiKey: ImageButton
 
     // Data storage
+    private var llmConfigs = mutableListOf<LLMConfig>()
+    private var selectedLlmIndex = 0
     private var headerConfigs = mutableListOf<HeaderConfig>()
     private var promptConfigs = mutableListOf<PromptConfig>()
     private var buttonConfigs = mutableListOf<ButtonConfig>()
@@ -119,9 +125,7 @@ class SecondActivity : AppCompatActivity() {
             // Home button functionality
             findViewById<Button>(R.id.btnHome).setOnClickListener {
                 Log.d("SecondActivity", "Home button clicked")
-                // Create intent to go back to MainActivity
                 val intent = Intent(this, MainActivity::class.java)
-                // Clear the activity stack to start fresh
                 intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
                 startActivity(intent)
                 finish()
@@ -153,6 +157,9 @@ class SecondActivity : AppCompatActivity() {
             etApiKey = findViewById(R.id.etApiKey)
             btnToggleApiKey = findViewById(R.id.btnToggleApiKey)
             etModel = findViewById(R.id.etModel)
+            etModelName = findViewById(R.id.etModelName)
+            spModelSelector = findViewById(R.id.spModelSelector)
+            btnAddModel = findViewById(R.id.btnAddModel)
             btnTestConnection = findViewById(R.id.btnTestConnection)
             tvTestStatus = findViewById(R.id.tvTestStatus)
             
@@ -189,14 +196,12 @@ class SecondActivity : AppCompatActivity() {
                 Log.d("SecondActivity", "API key toggle clicked")
                 val isPassword = etApiKey.transformationMethod is PasswordTransformationMethod
                 etApiKey.transformationMethod = if (isPassword) null else PasswordTransformationMethod()
-                // Move cursor to end
                 etApiKey.setSelection(etApiKey.text.length)
                 
-                // Update icon based on state
                 if (isPassword) {
-                    btnToggleApiKey.setImageResource(android.R.drawable.ic_menu_view) // Show eye
+                    btnToggleApiKey.setImageResource(android.R.drawable.ic_menu_view)
                 } else {
-                    btnToggleApiKey.setImageResource(android.R.drawable.ic_lock_idle_lock) // Show lock
+                    btnToggleApiKey.setImageResource(android.R.drawable.ic_lock_idle_lock)
                 }
             }
             
@@ -206,10 +211,10 @@ class SecondActivity : AppCompatActivity() {
                 val isExpanded = layoutHeaderContent.visibility == View.VISIBLE
                 if (isExpanded) {
                     layoutHeaderContent.visibility = View.GONE
-                    ivHeaderArrow.rotation = 0f // Point right
+                    ivHeaderArrow.rotation = 0f
                 } else {
                     layoutHeaderContent.visibility = View.VISIBLE
-                    ivHeaderArrow.rotation = 90f // Point down
+                    ivHeaderArrow.rotation = 90f
                 }
             }
             
@@ -219,10 +224,10 @@ class SecondActivity : AppCompatActivity() {
                 val isExpanded = layoutPromptContent.visibility == View.VISIBLE
                 if (isExpanded) {
                     layoutPromptContent.visibility = View.GONE
-                    ivPromptArrow.rotation = 0f // Point right
+                    ivPromptArrow.rotation = 0f
                 } else {
                     layoutPromptContent.visibility = View.VISIBLE
-                    ivPromptArrow.rotation = 90f // Point down
+                    ivPromptArrow.rotation = 90f
                 }
             }
             
@@ -253,14 +258,12 @@ class SecondActivity : AppCompatActivity() {
 
     private fun loadConfigurations() {
         Log.d("SecondActivity", "loadConfigurations: Starting")
-        // Load shared preferences
         val sharedPrefs = getSharedPreferences("APIConfigs", Context.MODE_PRIVATE)
         val json = sharedPrefs.getString("configs", null)
         Log.d("SecondActivity", "loadConfigurations: JSON loaded: ${json?.substring(0, minOf(json.length, 100))}")
         
         if (json != null) {
             try {
-                // Try to load as new format first
                 Log.d("SecondActivity", "loadConfigurations: Trying to parse as SettingsData")
                 val settings = Gson().fromJson(json, SettingsData::class.java)
                 Log.d("SecondActivity", "loadConfigurations: SettingsData parsed successfully")
@@ -268,12 +271,27 @@ class SecondActivity : AppCompatActivity() {
                 promptConfigs = settings.promptConfigs?.toMutableList() ?: mutableListOf()
                 buttonConfigs = settings.buttonConfigs?.toMutableList() ?: mutableListOf()
                 
-                // Load LLM config
-                etBaseUrl.setText(settings.llmConfig?.baseUrl ?: "https://api.openai.com/v1")
-                etApiKey.setText(settings.llmConfig?.apiKey ?: "")
-                etModel.setText(settings.llmConfig?.model ?: "gpt-4o")
+                llmConfigs = settings.llmConfigs?.toMutableList() ?: mutableListOf()
+                selectedLlmIndex = settings.selectedLlmIndex ?: 0
+                
+                if (llmConfigs.isEmpty()) {
+                    val legacyBaseUrl = settings.llmConfig?.baseUrl ?: "https://api.openai.com/v1"
+                    val legacyApiKey = settings.llmConfig?.apiKey ?: ""
+                    val legacyModel = settings.llmConfig?.model ?: "gpt-4o"
+                    llmConfigs.add(LLMConfig(
+                        name = "默认配置",
+                        baseUrl = legacyBaseUrl,
+                        apiKey = legacyApiKey,
+                        model = legacyModel
+                    ))
+                }
+                
+                if (selectedLlmIndex >= llmConfigs.size) {
+                    selectedLlmIndex = 0
+                }
+                
+                loadSelectedModelToFields()
                 
-                // Load Note API config
                 settings.noteApiConfig?.let { noteConfig ->
                     val apiTypes = listOf("Flomo", "Notion", "Joplin", "Custom")
                     val typeIndex = apiTypes.indexOf(noteConfig.apiType)
@@ -284,12 +302,10 @@ class SecondActivity : AppCompatActivity() {
                     etNoteApiKey.setText(noteConfig.apiKey)
                 }
                 
-                // Update API key visibility based on whether it has text
                 updateApiKeyVisibility()
                 
             } catch (e: Exception) {
                 Log.e("SecondActivity", "loadConfigurations: Error parsing SettingsData", e)
-                // If new format fails, try to load old format for migration
                 try {
                     Log.d("SecondActivity", "loadConfigurations: Trying to parse as List<APIConfig>")
                     val type = object : TypeToken<List<APIConfig>>() {}.type
@@ -303,14 +319,12 @@ class SecondActivity : AppCompatActivity() {
                     }
                 } catch (e2: Exception) {
                     Log.e("SecondActivity", "loadConfigurations: Error parsing List<APIConfig>", e2)
-                    // If both fail, use defaults
                     etBaseUrl.setText("https://api.openai.com/v1")
                     etModel.setText("gpt-4o")
                     updateApiKeyVisibility()
                 }
             }
         } else {
-            // No saved config, use defaults
             Log.d("SecondActivity", "loadConfigurations: No saved config, using defaults")
             etBaseUrl.setText("https://api.openai.com/v1")
             etModel.setText("gpt-4o")
@@ -319,18 +333,59 @@ class SecondActivity : AppCompatActivity() {
         Log.d("SecondActivity", "loadConfigurations: Completed")
     }
 
+    private fun loadSelectedModelToFields() {
+        if (llmConfigs.isNotEmpty() && selectedLlmIndex < llmConfigs.size) {
+            val config = llmConfigs[selectedLlmIndex]
+            etBaseUrl.setText(config.baseUrl)
+            etApiKey.setText(config.apiKey)
+            etModel.setText(config.model)
+            etModelName.setText(config.name)
+        }
+    }
+
     private fun updateApiKeyVisibility() {
         val isEmpty = etApiKey.text.toString().isEmpty()
         etApiKey.transformationMethod = if (isEmpty) null else PasswordTransformationMethod()
-        // Keep cursor at end
         etApiKey.setSelection(etApiKey.text.length)
     }
 
+    private fun refreshModelSelector() {
+        val names = llmConfigs.map { it.name.ifEmpty { "未命名" } }.toMutableList()
+        val adapter = ArrayAdapter(this, android.R.layout.simple_spinner_item, names)
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
+        spModelSelector.adapter = adapter
+    }
+
     private fun setupUI() {
+        refreshModelSelector()
+        
+        spModelSelector.setOnItemSelectedListener(object : android.widget.AdapterView.OnItemSelectedListener {
+            override fun onItemSelected(parent: android.widget.AdapterView<*>, view: android.view.View?, position: Int, id: Long) {
+                selectedLlmIndex = position
+                loadSelectedModelToFields()
+            }
+            override fun onNothingSelected(parent: android.widget.AdapterView<*>) {}
+        })
+        
+        btnAddModel.setOnClickListener {
+            val newName = "新配置 ${llmConfigs.size + 1}"
+            val newConfig = LLMConfig(
+                name = newName,
+                baseUrl = etBaseUrl.text.toString().ifEmpty { "https://api.openai.com/v1" },
+                apiKey = "",
+                model = "gpt-4o"
+            )
+            llmConfigs.add(newConfig)
+            selectedLlmIndex = llmConfigs.size - 1
+            loadSelectedModelToFields()
+            refreshModelSelector()
+            spModelSelector.setSelection(selectedLlmIndex)
+        }
+        
         // Setup headers
         llHeadersList.removeAllViews()
         if (headerConfigs.isEmpty()) {
-            addHeaderEntry() // Add one empty entry by default
+            addHeaderEntry()
         } else {
             for (header in headerConfigs) {
                 addHeaderEntry(header.key, header.value)
@@ -340,7 +395,7 @@ class SecondActivity : AppCompatActivity() {
         // Setup prompts
         llPromptList.removeAllViews()
         if (promptConfigs.isEmpty()) {
-            addPromptEntry() // Add one empty entry by default
+            addPromptEntry()
         } else {
             for (prompt in promptConfigs) {
                 addPromptEntry(prompt.title, prompt.content)
@@ -358,10 +413,8 @@ class SecondActivity : AppCompatActivity() {
     }
 
     private fun setupTheme() {
-        // Get saved theme mode
         val themeMode = ThemeManager.getThemeMode(this)
         
-        // Set the correct radio button
         when (themeMode) {
             ThemeManager.THEME_FOLLOW_SYSTEM -> rbThemeFollowSystem.isChecked = true
             ThemeManager.THEME_LIGHT -> rbThemeLight.isChecked = true
@@ -369,7 +422,6 @@ class SecondActivity : AppCompatActivity() {
             else -> rbThemeFollowSystem.isChecked = true
         }
         
-        // Set up radio group listener
         rgThemeMode.setOnCheckedChangeListener { _, checkedId ->
             val newMode = when (checkedId) {
                 R.id.rbThemeFollowSystem -> ThemeManager.THEME_FOLLOW_SYSTEM
@@ -378,11 +430,8 @@ class SecondActivity : AppCompatActivity() {
                 else -> ThemeManager.THEME_FOLLOW_SYSTEM
             }
             
-            // Save and apply the new theme
             ThemeManager.setThemeMode(this, newMode)
             Log.d("SecondActivity", "Theme mode changed to: ${ThemeManager.getThemeModeName(newMode)}")
-            
-            // Recreate activity to apply theme changes
             recreate()
         }
     }
@@ -418,10 +467,15 @@ class SecondActivity : AppCompatActivity() {
                 }
                 
                 val client = OkHttpClient()
-                val request = Request.Builder()
+                val requestBuilder = Request.Builder()
                     .url("$baseUrl/chat/completions")
                     .addHeader("Content-Type", "application/json")
-                    .addHeader("Authorization", "Bearer $apiKey")
+                
+                if (apiKey.isNotBlank()) {
+                    requestBuilder.addHeader("Authorization", "Bearer $apiKey")
+                }
+                
+                val request = requestBuilder
                     .post(requestBody.toString().toRequestBody("application/json".toMediaType()))
                     .build()
                 
@@ -496,7 +550,24 @@ class SecondActivity : AppCompatActivity() {
     }
 
     private fun saveConfigurations() {
-        // Update header configs from UI
+        if (llmConfigs.isNotEmpty() && selectedLlmIndex < llmConfigs.size) {
+            val currentConfig = llmConfigs[selectedLlmIndex]
+            llmConfigs[selectedLlmIndex] = currentConfig.copy(
+                name = etModelName.text.toString().ifEmpty { "未命名" },
+                baseUrl = etBaseUrl.text.toString(),
+                apiKey = etApiKey.text.toString(),
+                model = etModel.text.toString()
+            )
+        } else {
+            llmConfigs.add(LLMConfig(
+                name = etModelName.text.toString().ifEmpty { "默认配置" },
+                baseUrl = etBaseUrl.text.toString(),
+                apiKey = etApiKey.text.toString(),
+                model = etModel.text.toString()
+            ))
+            selectedLlmIndex = 0
+        }
+
         headerConfigs.clear()
         for (i in 0 until llHeadersList.childCount) {
             val view = llHeadersList.getChildAt(i)
@@ -507,7 +578,6 @@ class SecondActivity : AppCompatActivity() {
             }
         }
 
-        // Update prompt configs from UI
         promptConfigs.clear()
         for (i in 0 until llPromptList.childCount) {
             val view = llPromptList.getChildAt(i)
@@ -518,27 +588,17 @@ class SecondActivity : AppCompatActivity() {
             }
         }
         
-        // Note: Buttons are removed from this UI as per new design.
-        // We keep the list empty for data compatibility.
         buttonConfigs.clear()
 
-        // Save LLM config
-        val llmConfig = LLMConfig(
-            baseUrl = etBaseUrl.text.toString(),
-            apiKey = etApiKey.text.toString(),
-            model = etModel.text.toString()
-        )
-        
-        // Save Note API config
         val noteApiConfig = NoteApiConfig(
             apiType = spNoteApiType.selectedItem.toString(),
             apiUrl = etNoteApiUrl.text.toString(),
             apiKey = etNoteApiKey.text.toString()
         )
 
-        // Save everything
         val settingsData = SettingsData(
-            llmConfig = llmConfig,
+            llmConfigs = llmConfigs,
+            selectedLlmIndex = selectedLlmIndex,
             headerConfigs = headerConfigs,
             promptConfigs = promptConfigs,
             buttonConfigs = buttonConfigs,
@@ -549,7 +609,6 @@ class SecondActivity : AppCompatActivity() {
         val sharedPrefs = getSharedPreferences("APIConfigs", Context.MODE_PRIVATE)
         sharedPrefs.edit().putString("configs", json).apply()
         
-        // Also update the legacy APIConfig for backward compatibility
         apiConfig = APIConfig(
             System.currentTimeMillis(),
             "llm-config",
@@ -572,6 +631,7 @@ class SecondActivity : AppCompatActivity() {
 
     // New data classes for settings structure
     data class LLMConfig(
+        val name: String,
         val baseUrl: String,
         val apiKey: String,
         val model: String
@@ -584,10 +644,12 @@ class SecondActivity : AppCompatActivity() {
     )
 
     data class SettingsData(
-        val llmConfig: LLMConfig?,
+        val llmConfigs: List<LLMConfig>?,
+        val selectedLlmIndex: Int?,
         val headerConfigs: List<HeaderConfig>?,
         val promptConfigs: List<PromptConfig>?,
         val buttonConfigs: List<ButtonConfig>?,
-        val noteApiConfig: NoteApiConfig?
+        val noteApiConfig: NoteApiConfig?,
+        val llmConfig: LLMConfig? = null
     )
 }
\ No newline at end of file
diff --git a/flomo-ai/app/src/main/res/layout/activity_main.xml b/flomo-ai/app/src/main/res/layout/activity_main.xml
index 114f2b4..effed63 100644
--- a/flomo-ai/app/src/main/res/layout/activity_main.xml
+++ b/flomo-ai/app/src/main/res/layout/activity_main.xml
@@ -32,27 +32,12 @@
                 android:textStyle="bold"
                 android:textColor="@color/text_primary"/>
 
-            <LinearLayout
+            <Spinner
+                android:id="@+id/headerModelSelector"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:orientation="horizontal"
-                android:gravity="center_vertical"
-                android:layout_marginTop="2dp">
-
-                <View
-                    android:layout_width="6dp"
-                    android:layout_height="6dp"
-                    android:background="@drawable/indicator_dot"/>
-
-                <TextView
-                    android:id="@+id/headerModelName"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:text="GPT-4o"
-                    android:textSize="11sp"
-                    android:textColor="@color/primary"
-                    android:layout_marginStart="5dp"/>
-            </LinearLayout>
+                android:layout_marginTop="2dp"
+                android:spinnerMode="dropdown"/>
         </LinearLayout>
 
         <Button
diff --git a/flomo-ai/app/src/main/res/layout/activity_second.xml b/flomo-ai/app/src/main/res/layout/activity_second.xml
index 629d6c8..2586491 100644
--- a/flomo-ai/app/src/main/res/layout/activity_second.xml
+++ b/flomo-ai/app/src/main/res/layout/activity_second.xml
@@ -126,6 +126,64 @@
                     android:textColor="@color/text_hint"
                     android:textSize="14sp" />
 
+                <!-- Base URL -->
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="16dp"
+                    android:orientation="vertical">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="配置名称"
+                        android:textColor="@color/text_secondary"
+                        android:textSize="14sp" />
+
+                    <EditText
+                        android:id="@+id/etModelName"
+                        android:layout_width="match_parent"
+                        android:layout_height="48dp"
+                        android:layout_marginTop="8dp"
+                        android:background="@drawable/edittext_border"
+                        android:hint="默认配置"
+                        android:inputType="text"
+                        android:padding="12dp"
+                        android:textColor="@color/text_secondary"
+                        android:textColorHint="@color/text_hint"
+                        android:textSize="16sp" />
+                </LinearLayout>
+
+                <!-- 模型选择器 -->
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="16dp"
+                    android:orientation="horizontal"
+                    android:gravity="center_vertical">
+
+                    <Spinner
+                        android:id="@+id/spModelSelector"
+                        android:layout_width="0dp"
+                        android:layout_height="48dp"
+                        android:layout_weight="1"
+                        android:background="@drawable/edittext_border"
+                        android:spinnerMode="dropdown"
+                        android:padding="12dp"/>
+
+                    <Button
+                        android:id="@+id/btnAddModel"
+                        android:layout_width="wrap_content"
+                        android:layout_height="40dp"
+                        android:layout_marginStart="8dp"
+                        android:text="+ 添加"
+                        android:textSize="14sp"
+                        android:textColor="@color/white"
+                        android:background="@drawable/button_primary_bg"
+                        android:minWidth="0dp"
+                        android:minHeight="0dp"/>
+                </LinearLayout>
+
                 <!-- Base URL -->
                 <LinearLayout
                     android:layout_width="match_parent"