refactor(provider): replace startup auto-import with manual import button

Remove the startup loop in lib.rs that auto-imported default providers
for Claude/Codex/Gemini. Move config snippet extraction logic into the
import_default_config command so it works when triggered manually.

Add an "Import Current Config" button to ProviderEmptyState, wired via
useMutation in ProviderList (shown only for standard apps). Update i18n
keys (zh/en/ja) with new button labels and revised empty state text.

src-tauri/src/commands/provider.rs

@@ -93,7 +93,29 @@ pub fn switch_provider(
 }
 
 fn import_default_config_internal(state: &AppState, app_type: AppType) -> Result<bool, AppError> {
-    ProviderService::import_default_config(state, app_type)
+    let imported = ProviderService::import_default_config(state, app_type.clone())?;
+
+    if imported {
+        // Extract common config snippet (mirrors old startup logic in lib.rs)
+        if state
+            .db
+            .get_config_snippet(app_type.as_str())
+            .ok()
+            .flatten()
+            .is_none()
+        {
+            match ProviderService::extract_common_config_snippet(state, app_type.clone()) {
+                Ok(snippet) if !snippet.is_empty() && snippet != "{}" => {
+                    let _ = state
+                        .db
+                        .set_config_snippet(app_type.as_str(), Some(snippet));
+                }
+                _ => {}
+            }
+        }
+    }
+
+    Ok(imported)
 }
 
 #[cfg_attr(not(feature = "test-hooks"), doc(hidden))]

src-tauri/src/lib.rs

@@ -448,52 +448,7 @@ pub fn run() {
                 Err(e) => log::warn!("✗ Failed to read skills migration flag: {e}"),
             }
 
-            // 2. 导入供应商配置（已有内置检查：该应用已有供应商则跳过）
-            for app in [
-                crate::app_config::AppType::Claude,
-                crate::app_config::AppType::Codex,
-                crate::app_config::AppType::Gemini,
-            ] {
-                match crate::services::provider::ProviderService::import_default_config(
-                    &app_state,
-                    app.clone(),
-                ) {
-                    Ok(true) => {
-                        log::info!("✓ Imported default provider for {}", app.as_str());
-
-                        // 首次运行：自动提取通用配置片段（仅当通用配置为空时）
-                        if app_state
-                            .db
-                            .get_config_snippet(app.as_str())
-                            .ok()
-                            .flatten()
-                            .is_none()
-                        {
-                            match crate::services::provider::ProviderService::extract_common_config_snippet(&app_state, app.clone()) {
-                                Ok(snippet) if !snippet.is_empty() && snippet != "{}" => {
-                                    if let Err(e) = app_state.db.set_config_snippet(app.as_str(), Some(snippet)) {
-                                        log::warn!("✗ Failed to save common config snippet for {}: {e}", app.as_str());
-                                    } else {
-                                        log::info!("✓ Extracted common config snippet for {}", app.as_str());
-                                    }
-                                }
-                                Ok(_) => log::debug!("○ No common config to extract for {}", app.as_str()),
-                                Err(e) => log::debug!("○ Failed to extract common config for {}: {e}", app.as_str()),
-                            }
-                        }
-                    }
-                    Ok(false) => {} // 已有供应商，静默跳过
-                    Err(e) => {
-                        log::debug!(
-                            "○ No default provider to import for {}: {}",
-                            app.as_str(),
-                            e
-                        );
-                    }
-                }
-            }
-
-            // 2.1 OpenCode 供应商导入（累加式模式，需特殊处理）
+            // 2. OpenCode 供应商导入（累加式模式，需特殊处理）
             // OpenCode 与其他应用不同：配置文件中可同时存在多个供应商
             // 需要遍历 provider 字段下的每个供应商并导入
             match crate::services::provider::import_opencode_providers_from_live(&app_state) {