Fix e2e swap tests for new asset-row formatting

The blockaidScan swap tests asserted the asset row was visible via a loose
getByText(/USDC/) / getByText(/XLM/) locator, then clicked the row's
-balance testid. Now that the row's second line includes the asset code
("100 USDC"), the regex matches both the heading and the balance line,
tripping Playwright strict mode. Assert visibility on the -balance testid
the test already clicks, which is unambiguous and intention-revealing.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: piyalbasu

extension/e2e-tests/blockaidScan.malicious.test.ts

@@ -271,12 +271,12 @@ test.describe("BlockAid Scan - Malicious States", () => {
     await expect(page.getByTestId("AppHeaderPageTitle")).toContainText(
       "Swap from",
     );
-    await expect(page.getByText(/XLM/)).toBeVisible();
+    await expect(page.getByTestId("XLM-balance")).toBeVisible();
     await page.getByTestId("XLM-balance").click();
 
     await page.getByTestId("swap-dst-asset-tile").click({ force: true });
     await expect(page.getByText("Swap to")).toBeVisible();
-    await expect(page.getByText(/USDC/)).toBeVisible();
+    await expect(page.getByTestId("USDC-balance")).toBeVisible();
     await page.getByTestId("USDC-balance").click();
 
     await expect(page.getByTestId("AppHeaderPageTitle")).toContainText("Swap");

extension/e2e-tests/blockaidScan.safe.test.ts

@@ -275,12 +275,12 @@ test.describe("BlockAid Scan - Safe States (No Override)", () => {
     await expect(page.getByTestId("AppHeaderPageTitle")).toContainText(
       "Swap from",
     );
-    await expect(page.getByText(/XLM/)).toBeVisible();
+    await expect(page.getByTestId("XLM-balance")).toBeVisible();
     await page.getByTestId("XLM-balance").click();
 
     await page.getByTestId("swap-dst-asset-tile").click({ force: true });
     await expect(page.getByText("Swap to")).toBeVisible();
-    await expect(page.getByText(/USDC/)).toBeVisible();
+    await expect(page.getByTestId("USDC-balance")).toBeVisible();
     await page.getByTestId("USDC-balance").click();
 
     await expect(page.getByTestId("AppHeaderPageTitle")).toContainText("Swap");

extension/e2e-tests/blockaidScan.suspicious.test.ts

@@ -259,12 +259,12 @@ test.describe("BlockAid Scan - Suspicious States", () => {
     await expect(page.getByTestId("AppHeaderPageTitle")).toContainText(
       "Swap from",
     );
-    await expect(page.getByText(/XLM/)).toBeVisible();
+    await expect(page.getByTestId("XLM-balance")).toBeVisible();
     await page.getByTestId("XLM-balance").click();
 
     await page.getByTestId("swap-dst-asset-tile").click({ force: true });
     await expect(page.getByText("Swap to")).toBeVisible();
-    await expect(page.getByText(/USDC/)).toBeVisible();
+    await expect(page.getByTestId("USDC-balance")).toBeVisible();
     await page.getByTestId("USDC-balance").click();
 
     await expect(page.getByTestId("AppHeaderPageTitle")).toContainText("Swap");

extension/e2e-tests/blockaidScan.unable.test.ts

@@ -284,13 +284,13 @@ test.describe("BlockAid Scan - Unable to Scan States", () => {
     await expect(page.getByTestId("AppHeaderPageTitle")).toContainText(
       "Swap from",
     );
-    await expect(page.getByText(/XLM/)).toBeVisible();
+    await expect(page.getByTestId("XLM-balance")).toBeVisible();
     await page.getByTestId("XLM-balance").click();
 
     // Select destination token (USDC)
     await page.getByTestId("swap-dst-asset-tile").click({ force: true });
     await expect(page.getByText("Swap to")).toBeVisible();
-    await expect(page.getByText(/USDC/)).toBeVisible();
+    await expect(page.getByTestId("USDC-balance")).toBeVisible();
     await page.getByTestId("USDC-balance").click();
 
     // Wait to be back at amount step