add colored borders to player's quickchat option buttons (#2821)

Resolves #2820

## Description:

Add colored borders to the `chat-option-button` corresponding to each
players territory color.

<img width="630" height="565" alt="Image"
src="https://github.com/user-attachments/assets/91a99230-0581-4d83-a470-9a02ba43c045"
/>

## 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

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

denelduck

---------

Co-authored-by: VariableVince <24507472+VariableVince@users.noreply.github.com>

src/client/graphics/layers/ChatModal.ts

@@ -142,6 +142,9 @@ export class ChatModal extends LitElement {
                           player
                             ? "selected"
                             : ""}"
+                          style="border: 2px solid ${player
+                            .territoryColor()
+                            .toHex()};"
                           @click=${() => this.selectPlayer(player)}
                         >
                           ${player.name()}