fix(import): refresh all providers immediately after SQL import

- Remove setTimeout delay that could be cancelled on component unmount
- Invalidate all providers cache (not just current app) since import affects all apps
- Call onImportSuccess before sync to ensure UI refresh even if sync fails
- Update i18n: "Data refreshed" (past tense, reflecting immediate action)

tests/hooks/useImportExport.test.tsx

@@ -110,12 +110,6 @@ describe("useImportExport Hook", () => {
     expect(result.current.status).toBe("success");
     expect(result.current.backupId).toBe("backup-123");
     expect(toastSuccessMock).toHaveBeenCalledTimes(1);
-
-    // Skip delay to execute callback
-    await act(async () => {
-      vi.runOnlyPendingTimers();
-    });
-
     expect(onImportSuccess).toHaveBeenCalledTimes(1);
   });