feat: Dynamically update the countdown tracker's add button tooltip and icon based on existing countdowns, and increment module version.

module.json

@@ -1,7 +1,7 @@
 {
     "id": "dh-improved-countdowns",
     "title": "Improved Countdowns",
-    "version": "1.2.0",
+    "version": "1.2.1",
     "compatibility": {
         "minimum": "13",
         "verified": "13"
@@ -40,5 +40,5 @@
     "description": "A modern, draggable countdown tracker for the Daggerheart system.",
     "url": "https://github.com/cptn-cosmo/dh-improved-countdowns",
     "manifest": "https://github.com/cptn-cosmo/dh-improved-countdowns/releases/latest/download/module.json",
-    "download": "https://github.com/cptn-cosmo/dh-improved-countdowns/releases/download/1.2.0/dh-improved-countdowns.zip"
+    "download": "https://github.com/cptn-cosmo/dh-improved-countdowns/releases/download/1.2.1/dh-improved-countdowns.zip"
 }

scripts/countdown-app.js

@@ -99,8 +99,11 @@ export class CountdownTrackerApp extends HandlebarsApplicationMixin(ApplicationV
             }
         }
 
+        const hasCountdowns = Object.keys(countdowns).length > 0;
+
         return {
             countdowns,
+            hasCountdowns,
             isGM,
             isMinimized,
             isLocked,

templates/countdown-tracker.hbs

@@ -5,8 +5,9 @@
         </div>
         <div class="header-controls">
             {{#if isGM}}
-            <a class="control-btn" data-action="addCountdown" data-tooltip="Add New Countdown">
-                <i class="fa-solid fa-plus-circle"></i>
+            <a class="control-btn" data-action="addCountdown"
+                data-tooltip="{{#if hasCountdowns}}Manage Countdowns{{else}}Add New Countdown{{/if}}">
+                <i class="fa-solid {{#if hasCountdowns}}fa-pen-to-square{{else}}fa-plus-circle{{/if}}"></i>
             </a>
             {{/if}}
             <a class="control-btn" data-action="toggleLock"