- add advanced settings section with expandable UI

- implement configurable alarm settings (duration, volume, loop)
- add alarm test functionality
- fix alarm handling with proper event cleanup
- optimize CSS by removing unnecessary whitespace and semicolons
- improve timer reset to properly stop alarms
- add window unload event handler to clean up audio resources
- implement settings persistence for advanced options
- update sitemap

Author: TobiasMue91

sitemap.xml

@@ -40,6 +40,11 @@
     <lastmod>2024-06-30T22:00:00+00:00</lastmod>
     <priority>0.80</priority>
   </url>
+  <url>
+    <loc>https://www.gptgames.dev/games/blockdrop.html</loc>
+    <lastmod>2024-11-17T23:00:00+00:00</lastmod>
+    <priority>0.80</priority>
+  </url>
   <url>
     <loc>https://www.gptgames.dev/games/breakout.html</loc>
     <lastmod>2024-07-05T22:00:00+00:00</lastmod>
@@ -85,6 +90,11 @@
     <lastmod>2024-08-19T22:00:00+00:00</lastmod>
     <priority>0.80</priority>
   </url>
+  <url>
+    <loc>https://www.gptgames.dev/games/emoji_horde_survival.html</loc>
+    <lastmod>2025-04-02T22:00:00+00:00</lastmod>
+    <priority>0.80</priority>
+  </url>
   <url>
     <loc>https://www.gptgames.dev/games/emoji_puzzle_mania.html</loc>
     <lastmod>2025-01-11T23:00:00+00:00</lastmod>
@@ -200,11 +210,6 @@
     <lastmod>2024-12-27T23:00:00+00:00</lastmod>
     <priority>0.80</priority>
   </url>
-  <url>
-    <loc>https://www.gptgames.dev/games/tetris.html</loc>
-    <lastmod>2024-11-17T23:00:00+00:00</lastmod>
-    <priority>0.80</priority>
-  </url>
   <url>
     <loc>https://www.gptgames.dev/games/tic_tac_toe_mp.html</loc>
     <lastmod>2024-11-22T23:00:00+00:00</lastmod>
@@ -305,6 +310,11 @@
     <lastmod>2023-12-03T23:00:00+00:00</lastmod>
     <priority>0.80</priority>
   </url>
+  <url>
+    <loc>https://www.gptgames.dev/tools/color_blindness_simulator.html</loc>
+    <lastmod>2025-04-06T22:00:00+00:00</lastmod>
+    <priority>0.80</priority>
+  </url>
   <url>
     <loc>https://www.gptgames.dev/tools/color_picker.html</loc>
     <lastmod>2023-09-09T22:00:00+00:00</lastmod>
@@ -390,6 +400,11 @@
     <lastmod>2025-02-24T23:00:00+00:00</lastmod>
     <priority>0.80</priority>
   </url>
+  <url>
+    <loc>https://www.gptgames.dev/tools/fractal_viewer_3d.html</loc>
+    <lastmod>2025-04-07T22:00:00+00:00</lastmod>
+    <priority>0.80</priority>
+  </url>
   <url>
     <loc>https://www.gptgames.dev/tools/game_of_life.html</loc>
     <lastmod>2025-03-12T23:00:00+00:00</lastmod>