Add encoding repair utilities and tests:

- Introduced `repairText` and `containsSuspiciousEncoding` utilities for handling corrupted text encodings.
- Added unit tests (`encoding-repair.spec.js`) to validate encoding repair and encoding marker detection.
- Integrated encoding check into unit test workflows (`text:check-encoding` and `text:fix-encoding` scripts).
- Replaced corrupted strings across multiple components and locales with proper UTF-8 encodings.

tests/e2e/admin-pos-orders.spec.ts

@@ -1462,6 +1462,52 @@ test.describe("Admin POS wash certificate completion", () => {
     await expect(safetySealInput).toHaveValue("SEAL-5566");
   });
 
+  test("refreshes the attachments tab after regenerating a wash certificate from a safety seal edit", async ({
+    page,
+  }, testInfo) => {
+    test.skip(!testInfo.project.name.includes("desktop"), "Desktop-only wash certificate refresh coverage");
+
+    await mockApi(page, {
+      authenticated: true,
+      permissions: POS_PERMISSIONS,
+      edgeGateways: false,
+      pos: createPosFixture(),
+    });
+    await primeOperatorSession(page, "pos-safety-seal-refresh-token");
+
+    await openOrderAttachments(page);
+    await openAddAttachmentCard(page);
+
+    const attachWashCertificateButton = page.getByTestId("pos-order-attachments-attach-wash-certificate");
+    await attachWashCertificateButton.click();
+    await expect(page.locator(".swal2-popup")).toBeVisible();
+    await page.locator(".swal2-input").fill("SEAL-INITIAL");
+    await page.locator(".swal2-confirm").click();
+    await expect(page.getByTestId("pos-order-attachment-card-400")).toBeVisible();
+    await waitForSwalToClose(page);
+
+    await clickVisibleTestId(page, "pos-order-tab-cart");
+    await expect(page.getByTestId("pos-order-panel-cart")).toBeVisible();
+
+    const updateRequest = waitForOrderMutation(
+      page,
+      "PUT",
+      "/orders",
+      (body) => Number(body.id) === 54518 && body.safety_seal === "SEAL-UPDATED"
+    );
+
+    await page.getByTestId("pos-order-customer-wishes-safety-seal").click();
+    const safetySealInput = page.getByTestId("pos-order-customer-wishes-safety-seal-input");
+    await expect(safetySealInput).toBeVisible();
+    await safetySealInput.fill("SEAL-UPDATED");
+    await updateRequest;
+
+    await clickVisibleTestId(page, "pos-order-tab-attachments");
+    await expect(page.getByTestId("pos-order-panel-attachments")).toBeVisible();
+    await expect(page.getByTestId("pos-order-attachment-card-401")).toBeVisible({ timeout: 10_000 });
+    await expect(page.getByTestId("pos-order-attachment-card-400")).toHaveCount(0);
+  });
+
   test("defers material desktop completion to step 4 and auto-attaches the wash certificate on final completion", async ({
     page,
   }, testInfo) => {