fix: 修复 Windows 构建编译错误和警告

- 修复 state_manager.rs 中 backup 变量需要 mut 的编译错误
- 移除 state_manager.rs 和 windows.rs 中 buffer_size 不必要的 mut
- 修复 windows.rs 中 exe_path 未使用的警告
- 移除 api_key_provider_cmd.rs 中未使用的 ProviderGroup 导入
- 为 ToolCallState 结构体添加 #[allow(dead_code)] 属性

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src-tauri/src/browser_interceptor/platform/windows.rs

@@ -106,7 +106,7 @@ impl WindowsInterceptor {
 
             if result.is_ok() {
                 let mut buffer = vec![0u16; 1024];
-                let mut buffer_size = buffer.len() * 2;
+                let buffer_size = buffer.len() * 2;
 
                 let mut buffer_size_u32 = buffer_size as u32;
                 let result = RegQueryValueExW(
@@ -139,7 +139,7 @@ impl WindowsInterceptor {
     async fn create_interceptor_executable(&mut self) -> Result<()> {
         // 创建一个简单的拦截器程序，用于接收 URL 参数
         let temp_dir = std::env::temp_dir();
-        let exe_path = temp_dir.join("proxycast_browser_interceptor.exe");
+        let _exe_path = temp_dir.join("proxycast_browser_interceptor.exe");
 
         // 创建拦截器脚本内容（批处理脚本）
         let bat_content = format!(

src-tauri/src/browser_interceptor/state_manager.rs

@@ -265,7 +265,7 @@ impl StateManager {
 
             if result.is_ok() {
                 let mut buffer = vec![0u16; 1024];
-                let mut buffer_size = buffer.len() * 2;
+                let buffer_size = buffer.len() * 2;
 
                 let mut buffer_size_u32 = buffer_size as u32;
                 let result = RegQueryValueExW(
@@ -292,7 +292,8 @@ impl StateManager {
 
     /// 备份注册表项（Windows 特定）
     async fn backup_registry_keys(&self) -> Result<std::collections::HashMap<String, String>> {
-        let backup = std::collections::HashMap::new();
+        #[allow(unused_mut)]
+        let mut backup = std::collections::HashMap::new();
 
         #[cfg(target_os = "windows")]
         {
@@ -329,7 +330,7 @@ impl StateManager {
 
             if result.is_ok() {
                 let mut buffer = vec![0u16; 1024];
-                let mut buffer_size = buffer.len() * 2;
+                let buffer_size = buffer.len() * 2;
 
                 let mut buffer_size_u32 = buffer_size as u32;
                 let result = RegQueryValueExW(

src-tauri/src/commands/api_key_provider_cmd.rs

@@ -6,7 +6,7 @@
 //! **Validates: Requirements 9.1**
 
 use crate::database::dao::api_key_provider::{
-    ApiKeyEntry, ApiKeyProvider, ApiProviderType, ProviderGroup, ProviderWithKeys,
+    ApiKeyEntry, ApiKeyProvider, ApiProviderType, ProviderWithKeys,
 };
 use crate::database::DbConnection;
 use crate::services::api_key_provider_service::{ApiKeyProviderService, ImportResult};

src-tauri/src/stream/generators/anthropic_sse.rs

@@ -31,6 +31,7 @@ use uuid::Uuid;
 
 /// 工具调用状态
 #[derive(Debug, Clone, Default)]
+#[allow(dead_code)]
 struct ToolCallState {
     /// 工具调用 ID
     id: String,

src-tauri/src/stream/generators/openai_sse.rs

@@ -32,6 +32,7 @@ pub struct OpenAiSseGenerator {
 }
 
 #[derive(Debug, Clone)]
+#[allow(dead_code)]
 struct ToolCallState {
     /// 工具调用在 tool_calls 数组中的索引
     index: usize,