refactor(startup): improve first-launch import logic with per-table detection

- Replace global `is_empty_for_first_import()` with independent checks:
  - `is_mcp_table_empty()` for MCP server imports
  - `is_prompts_table_empty()` for prompt imports
  - Skills and providers already have built-in idempotency checks

- Fix misleading logs in provider import:
  - Change `import_default_config` return type from `Result<()>` to `Result<bool>`
  - Return `true` when actually imported, `false` when skipped
  - Only log success message when import actually occurred

- Add idempotency protection to `import_from_file_on_first_launch`

This allows each data type to be independently recovered if deleted,
rather than requiring all tables to be empty for any import to trigger.

src-tauri/src/commands/provider.rs

@@ -86,7 +86,7 @@ pub fn switch_provider(
         .map_err(|e| e.to_string())
 }
 
-fn import_default_config_internal(state: &AppState, app_type: AppType) -> Result<(), AppError> {
+fn import_default_config_internal(state: &AppState, app_type: AppType) -> Result<bool, AppError> {
     ProviderService::import_default_config(state, app_type)
 }
 
@@ -94,7 +94,7 @@ fn import_default_config_internal(state: &AppState, app_type: AppType) -> Result
 pub fn import_default_config_test_hook(
     state: &AppState,
     app_type: AppType,
-) -> Result<(), AppError> {
+) -> Result<bool, AppError> {
     import_default_config_internal(state, app_type)
 }
 
@@ -102,9 +102,7 @@ pub fn import_default_config_test_hook(
 #[tauri::command]
 pub fn import_default_config(state: State<'_, AppState>, app: String) -> Result<bool, String> {
     let app_type = AppType::from_str(&app).map_err(|e| e.to_string())?;
-    import_default_config_internal(&state, app_type)
-        .map(|_| true)
-        .map_err(Into::into)
+    import_default_config_internal(&state, app_type).map_err(Into::into)
 }
 
 /// 查询供应商用量

src-tauri/src/database/mod.rs

@@ -115,28 +115,21 @@ impl Database {
         Ok(db)
     }
 
-    /// 检查数据库是否为空（需要首次导入）
-    ///
-    /// 通过检查是否有任何 MCP 服务器、提示词、Skills 仓库或供应商来判断
-    pub fn is_empty_for_first_import(&self) -> Result<bool, AppError> {
+    /// 检查 MCP 服务器表是否为空
+    pub fn is_mcp_table_empty(&self) -> Result<bool, AppError> {
         let conn = lock_conn!(self.conn);
-
-        let mcp_count: i64 = conn
+        let count: i64 = conn
             .query_row("SELECT COUNT(*) FROM mcp_servers", [], |row| row.get(0))
             .map_err(|e| AppError::Database(e.to_string()))?;
+        Ok(count == 0)
+    }
 
-        let prompt_count: i64 = conn
+    /// 检查提示词表是否为空
+    pub fn is_prompts_table_empty(&self) -> Result<bool, AppError> {
+        let conn = lock_conn!(self.conn);
+        let count: i64 = conn
             .query_row("SELECT COUNT(*) FROM prompts", [], |row| row.get(0))
             .map_err(|e| AppError::Database(e.to_string()))?;
-
-        let skill_repo_count: i64 = conn
-            .query_row("SELECT COUNT(*) FROM skill_repos", [], |row| row.get(0))
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        let provider_count: i64 = conn
-            .query_row("SELECT COUNT(*) FROM providers", [], |row| row.get(0))
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        Ok(mcp_count == 0 && prompt_count == 0 && skill_repo_count == 0 && provider_count == 0)
+        Ok(count == 0)
     }
 }

src-tauri/src/lib.rs

@@ -612,54 +612,47 @@ pub fn run() {
 
             let app_state = AppState::new(db);
 
-            // 检查是否需要首次导入（数据库为空）
-            let need_first_import = app_state
-                .db
-                .is_empty_for_first_import()
-                .unwrap_or_else(|e| {
-                    log::warn!("Failed to check if database is empty: {e}");
-                    false
-                });
+            // ============================================================
+            // 按表独立判断的导入逻辑（各类数据独立检查，互不影响）
+            // ============================================================
 
-            if need_first_import {
-                // 数据库为空，尝试从用户现有的配置文件导入数据并初始化默认配置
-                log::info!(
-                    "Empty database detected, importing existing configurations and initializing defaults..."
-                );
-
-                // 1. 初始化默认 Skills 仓库（3个）
-                match app_state.db.init_default_skill_repos() {
-                    Ok(count) if count > 0 => {
-                        log::info!("✓ Initialized {count} default skill repositories");
-                    }
-                    Ok(_) => log::debug!("No default skill repositories to initialize"),
-                    Err(e) => log::warn!("✗ Failed to initialize default skill repos: {e}"),
+            // 1. 初始化默认 Skills 仓库（已有内置检查：表非空则跳过）
+            match app_state.db.init_default_skill_repos() {
+                Ok(count) if count > 0 => {
+                    log::info!("✓ Initialized {count} default skill repositories");
                 }
+                Ok(_) => {} // 表非空，静默跳过
+                Err(e) => log::warn!("✗ Failed to initialize default skill repos: {e}"),
+            }
 
-                // 2. 导入供应商配置（从 live 配置文件）
-                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(_) => {
-                            log::info!("✓ Imported default provider for {}", app.as_str());
-                        }
-                        Err(e) => {
-                            log::debug!(
-                                "○ No default provider to import for {}: {}",
-                                app.as_str(),
-                                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());
+                    }
+                    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
+                        );
                     }
                 }
+            }
+
+            // 3. 导入 MCP 服务器配置（表空时触发）
+            if app_state.db.is_mcp_table_empty().unwrap_or(false) {
+                log::info!("MCP table empty, importing from live configurations...");
 
-                // 3. 导入 MCP 服务器配置
                 match crate::services::mcp::McpService::import_from_claude(&app_state) {
                     Ok(count) if count > 0 => {
                         log::info!("✓ Imported {count} MCP server(s) from Claude");
@@ -683,42 +676,28 @@ pub fn run() {
                     Ok(_) => log::debug!("○ No Gemini MCP servers found to import"),
                     Err(e) => log::warn!("✗ Failed to import Gemini MCP: {e}"),
                 }
+            }
 
-                // 4. 导入提示词文件
-                match crate::services::prompt::PromptService::import_from_file_on_first_launch(
-                    &app_state,
+            // 4. 导入提示词文件（表空时触发）
+            if app_state.db.is_prompts_table_empty().unwrap_or(false) {
+                log::info!("Prompts table empty, importing from live configurations...");
+
+                for app in [
                     crate::app_config::AppType::Claude,
-                ) {
-                    Ok(count) if count > 0 => {
-                        log::info!("✓ Imported {count} prompt(s) from Claude");
-                    }
-                    Ok(_) => log::debug!("○ No Claude prompt file found to import"),
-                    Err(e) => log::warn!("✗ Failed to import Claude prompt: {e}"),
-                }
-
-                match crate::services::prompt::PromptService::import_from_file_on_first_launch(
-                    &app_state,
                     crate::app_config::AppType::Codex,
-                ) {
-                    Ok(count) if count > 0 => {
-                        log::info!("✓ Imported {count} prompt(s) from Codex");
-                    }
-                    Ok(_) => log::debug!("○ No Codex prompt file found to import"),
-                    Err(e) => log::warn!("✗ Failed to import Codex prompt: {e}"),
-                }
-
-                match crate::services::prompt::PromptService::import_from_file_on_first_launch(
-                    &app_state,
                     crate::app_config::AppType::Gemini,
-                ) {
-                    Ok(count) if count > 0 => {
-                        log::info!("✓ Imported {count} prompt(s) from Gemini");
+                ] {
+                    match crate::services::prompt::PromptService::import_from_file_on_first_launch(
+                        &app_state,
+                        app.clone(),
+                    ) {
+                        Ok(count) if count > 0 => {
+                            log::info!("✓ Imported {count} prompt(s) for {}", app.as_str());
+                        }
+                        Ok(_) => log::debug!("○ No prompt file found for {}", app.as_str()),
+                        Err(e) => log::warn!("✗ Failed to import prompt for {}: {e}", app.as_str()),
                     }
-                    Ok(_) => log::debug!("○ No Gemini prompt file found to import"),
-                    Err(e) => log::warn!("✗ Failed to import Gemini prompt: {e}"),
                 }
-
-                log::info!("First-time import completed");
             }
 
             // 迁移旧的 app_config_dir 配置到 Store

src-tauri/src/services/prompt.rs

@@ -176,6 +176,12 @@ impl PromptService {
         state: &AppState,
         app: AppType,
     ) -> Result<usize, AppError> {
+        // 幂等性保护：该应用已有提示词则跳过
+        let existing = state.db.get_prompts(app.as_str())?;
+        if !existing.is_empty() {
+            return Ok(0);
+        }
+
         let file_path = prompt_file_path(&app)?;
 
         // 检查文件是否存在

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

@@ -215,11 +215,14 @@ pub fn read_live_settings(app_type: AppType) -> Result<Value, AppError> {
 }
 
 /// Import default configuration from live files
-pub fn import_default_config(state: &AppState, app_type: AppType) -> Result<(), AppError> {
+///
+/// Returns `Ok(true)` if a provider was actually imported,
+/// `Ok(false)` if skipped (providers already exist for this app).
+pub fn import_default_config(state: &AppState, app_type: AppType) -> Result<bool, AppError> {
     {
         let providers = state.db.get_all_providers(app_type.as_str())?;
         if !providers.is_empty() {
-            return Ok(());
+            return Ok(false); // 已有供应商，跳过
         }
     }
 
@@ -298,7 +301,7 @@ pub fn import_default_config(state: &AppState, app_type: AppType) -> Result<(),
         .db
         .set_current_provider(app_type.as_str(), &provider.id)?;
 
-    Ok(())
+    Ok(true) // 真正导入了
 }
 
 /// Write Gemini live configuration with authentication handling

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

@@ -225,7 +225,9 @@ impl ProviderService {
     }
 
     /// Import default configuration from live files (re-export)
-    pub fn import_default_config(state: &AppState, app_type: AppType) -> Result<(), AppError> {
+    ///
+    /// Returns `Ok(true)` if imported, `Ok(false)` if skipped.
+    pub fn import_default_config(state: &AppState, app_type: AppType) -> Result<bool, AppError> {
         import_default_config(state, app_type)
     }