fix(gemini): write security auth config only to Gemini settings file

- Remove redundant security.auth.selectedType from CC Switch settings
- Fix Generic provider type not writing security flag on switch
- All non-Google Official providers now correctly write "gemini-api-key"
- Delete unused ensure_packycode_security_flag function
- Clean up SecuritySettings and SecurityAuthSettings types from AppSettings

src-tauri/src/settings.rs

@@ -17,20 +17,6 @@ pub struct CustomEndpoint {
     pub last_used: Option<i64>,
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize, Default)]
-#[serde(rename_all = "camelCase")]
-pub struct SecurityAuthSettings {
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub selected_type: Option<String>,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize, Default)]
-#[serde(rename_all = "camelCase")]
-pub struct SecuritySettings {
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub auth: Option<SecurityAuthSettings>,
-}
-
 /// 应用设置结构，允许覆盖默认配置目录
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
@@ -53,8 +39,6 @@ pub struct AppSettings {
     /// 是否开机自启
     #[serde(default)]
     pub launch_on_startup: bool,
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub security: Option<SecuritySettings>,
     /// Claude 自定义端点列表
     #[serde(default, skip_serializing_if = "HashMap::is_empty")]
     pub custom_endpoints_claude: HashMap<String, CustomEndpoint>,
@@ -82,7 +66,6 @@ impl Default for AppSettings {
             gemini_config_dir: None,
             language: None,
             launch_on_startup: false,
-            security: None,
             custom_endpoints_claude: HashMap::new(),
             custom_endpoints_codex: HashMap::new(),
         }
@@ -269,27 +252,6 @@ pub fn reload_settings() -> Result<(), AppError> {
     Ok(())
 }
 
-pub fn ensure_security_auth_selected_type(selected_type: &str) -> Result<(), AppError> {
-    let mut settings = get_settings();
-    let current = settings
-        .security
-        .as_ref()
-        .and_then(|sec| sec.auth.as_ref())
-        .and_then(|auth| auth.selected_type.as_deref());
-
-    if current == Some(selected_type) {
-        return Ok(());
-    }
-
-    let mut security = settings.security.unwrap_or_default();
-    let mut auth = security.auth.unwrap_or_default();
-    auth.selected_type = Some(selected_type.to_string());
-    security.auth = Some(auth);
-    settings.security = Some(security);
-
-    update_settings(settings)
-}
-
 pub fn get_claude_override_dir() -> Option<PathBuf> {
     let settings = settings_store().read().ok()?;
     settings