feat(providers): auto-import OpenCode/OpenClaw live providers on startup

Drops the friction of clicking the manual "Import current config" button
for OpenCode and OpenClaw — they now match the auto-import behavior the
previous commit added for Claude/Codex/Gemini.

- New "1.6." startup block in lib.rs runs both
  import_opencode_providers_from_live and import_openclaw_providers_from_live
  on every launch. The functions are id-keyed and idempotent, so re-running
  just picks up new providers added externally to the live JSON files.
- Both functions now use a new Database::get_provider_ids() helper
  (HashSet<String> from a single SELECT id-only query) instead of
  get_all_providers(), avoiding the N+1 endpoint sub-queries that would
  otherwise hit the startup hot path on every launch.

src-tauri/src/lib.rs

@@ -502,6 +502,30 @@ pub fn run() {
                 Err(e) => log::warn!("✗ Failed to seed official providers: {e}"),
             }
 
+            // 1.6. 自动同步 OpenCode / OpenClaw 的 live providers 到数据库
+            //
+            // additive 模式（OpenCode / OpenClaw）的 import 函数本身按 id 幂等，
+            // 已有的 provider 会被跳过，所以每次启动都跑是安全的——既保证新装
+            // 用户开箱可见 live 中的供应商，也让外部修改的 live 文件能在重启
+            // 后同步到数据库（与之前依赖前端"导入当前配置"按钮手动触发不同）。
+            //
+            // 底层 read_*_config 在文件不存在时返回默认空配置，因此新装且无
+            // live 文件的用户走 Ok(0) 路径，不会产生错误日志噪音。
+            match crate::services::provider::import_opencode_providers_from_live(&app_state) {
+                Ok(count) if count > 0 => {
+                    log::info!("✓ Imported {count} OpenCode provider(s) from live config");
+                }
+                Ok(_) => log::debug!("○ No new OpenCode providers to import"),
+                Err(e) => log::warn!("✗ Failed to import OpenCode providers: {e}"),
+            }
+            match crate::services::provider::import_openclaw_providers_from_live(&app_state) {
+                Ok(count) if count > 0 => {
+                    log::info!("✓ Imported {count} OpenClaw provider(s) from live config");
+                }
+                Ok(_) => log::debug!("○ No new OpenClaw providers to import"),
+                Err(e) => log::warn!("✗ Failed to import OpenClaw providers: {e}"),
+            }
+
             // 2. OMO 配置导入（当数据库中无 OMO provider 时，从本地文件导入）
             {
                 let has_omo = app_state