Followup: news-button: blue-glow; simpler localStorage (#1431)

## Description:

Changed the localStorage key from "news-button-last-seen-version" to a
simpler "version" in the NewsButton component.
And reverting a coderabbit recommendation in the css file, that
eliminated the blue glow effect.

Follow-up to #1385

<img width="808" height="845" alt="Screenshot 2025-07-14 205018"
src="https://github.com/user-attachments/assets/8c26c36c-ee2e-4a53-af61-f371eefd102a"
/>

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

## Please put your Discord username so you can be contacted if a bug or
regression is found:

[UN]nvm

src/client/components/NewsButton.ts

@@ -17,9 +17,7 @@ export class NewsButton extends LitElement {
 
   private checkForNewVersion() {
     try {
-      const lastSeenVersion = localStorage.getItem(
-        "news-button-last-seen-version",
-      );
+      const lastSeenVersion = localStorage.getItem("version");
       this.isActive = lastSeenVersion !== version;
     } catch (error) {
       // Fallback to NOT showing notification if localStorage fails
@@ -28,7 +26,7 @@ export class NewsButton extends LitElement {
   }
 
   private handleClick() {
-    localStorage.setItem("news-button-last-seen-version", version);
+    localStorage.setItem("version", version);
     this.isActive = false;
 
     const newsModal = document.querySelector("news-modal") as NewsModal;

src/client/styles.css

@@ -631,7 +631,7 @@ label.option-card:hover {
 }
 
 /* News Button Notification */
-.news-button .active button {
+news-button .active button {
   position: relative;
   border-color: #2563eb !important;
   border-width: 2px !important;