fix(opencode): fix add/remove provider flow and toast messages

- Create separate removeFromLiveConfig API for additive mode apps
  (remove only removes from live config, not database)
- Fix useSwitchProviderMutation to invalidate opencodeLiveProviderIds
  cache so button state updates correctly after add operation
- Show appropriate toast messages:
  - Add: "已添加到配置" / "Added to config"
  - Remove: "已从配置移除" / "Removed from config"
- Add i18n texts for addToConfigSuccess and removeFromConfigSuccess

src-tauri/src/commands/provider.rs

@@ -60,6 +60,16 @@ pub fn delete_provider(
         .map_err(|e| e.to_string())
 }
 
+/// Remove provider from live config only (for additive mode apps like OpenCode)
+/// Does NOT delete from database - provider remains in the list
+#[tauri::command]
+pub fn remove_provider_from_live_config(app: String, id: String) -> Result<bool, String> {
+    let app_type = AppType::from_str(&app).map_err(|e| e.to_string())?;
+    ProviderService::remove_from_live_config(app_type, &id)
+        .map(|_| true)
+        .map_err(|e| e.to_string())
+}
+
 /// 切换供应商
 fn switch_provider_internal(state: &AppState, app_type: AppType, id: &str) -> Result<(), AppError> {
     ProviderService::switch(state, app_type, id)

src-tauri/src/lib.rs

@@ -713,6 +713,7 @@ pub fn run() {
             commands::add_provider,
             commands::update_provider,
             commands::delete_provider,
+            commands::remove_provider_from_live_config,
             commands::switch_provider,
             commands::import_default_config,
             commands::get_claude_config_status,

src-tauri/src/services/provider/mod.rs

@@ -261,6 +261,27 @@ impl ProviderService {
         state.db.delete_provider(app_type.as_str(), id)
     }
 
+    /// Remove provider from live config only (for additive mode apps like OpenCode)
+    ///
+    /// Does NOT delete from database - provider remains in the list.
+    /// This is used when user wants to "remove" a provider from active config
+    /// but keep it available for future use.
+    pub fn remove_from_live_config(app_type: AppType, id: &str) -> Result<(), AppError> {
+        match app_type {
+            AppType::OpenCode => {
+                remove_opencode_provider_from_live(id)?;
+            }
+            // Future: add other additive mode apps here
+            _ => {
+                return Err(AppError::Message(format!(
+                    "App {} does not support remove from live config",
+                    app_type.as_str()
+                )));
+            }
+        }
+        Ok(())
+    }
+
     /// Switch to a provider
     ///
     /// Switch flow: