Force a consistent non-UTC timezone for tests, so we can validate out…

…puts. Minor cleanup.

client/src/utils/dates.test.ts

@@ -38,4 +38,4 @@ describe("dates.ts", () => {
             expect(formatted).toBe("Sunday Oct 1st 8:00:00 2023 GMT-4");
         });
     });
-});
+});

client/src/utils/dates.ts

@@ -20,7 +20,7 @@ export function galaxyTimeToDate(galaxyTime: string): Date {
 }
 
 /**
- * Formats a UTC Date object into a human-readable string.
+ * Formats a UTC Date object into a human-readable string, localized to the user's time zone.
  * @param {Date} utcDate - The UTC Date object.
  * @returns {string} The formatted date string.
  */
@@ -29,7 +29,7 @@ export function localizeUTCPretty(utcDate: Date): string {
 }
 
 /**
- * Converts a Galaxy time string to a human-readable formatted date string.
+ * Converts a Galaxy time string to a human-readable formatted date string, localized to the user's time zone.
  * @param {string} galaxyTime - The Galaxy time string in ISO format.
  * @returns {string} The formatted date string.
  */

client/tests/jest/jest.setup.js

@@ -12,6 +12,9 @@ Vue.config.devtools = false;
 and this makes the tag tests work correctly */
 global.setImmediate = global.setTimeout;
 
+// Consistent timezone for tests so we can compare date strings
+process.env.TZ = "America/New_York";
+
 // Always mock the following imports
 jest.mock("@/composables/hashedUserId");
 jest.mock("@/composables/userLocalStorage");