🎨 Update theme config

src/components/theme.svelte

@@ -1,59 +1,12 @@
 <script lang="ts">
-  import { onMount } from 'svelte';
-  let dark: boolean;
-  let hidden = true;
-
-  onMount(() => {
-    dark = document.documentElement.classList.contains('dark');
-    hidden = false;
-    const matcher = window.matchMedia('(prefers-color-scheme: dark)');
-    matcher.addEventListener('change', handleChange);
-    return () => matcher.removeEventListener('change', handleChange);
-  });
-
-  function handleChange({ matches: dark }: MediaQueryListEvent) {
-    if (!localStorage.theme) {
-      setMode(dark);
-    }
-  }
-
-  function toggle() {
-    setMode(!dark);
-  }
-
-  function setMode(value: boolean) {
-    dark = value;
-    if (dark) {
-      document.documentElement.classList.add('dark');
-    } else {
-      document.documentElement.classList.remove('dark');
-    }
-    localStorage.theme = dark ? 'dark' : 'light';
-    if (window.matchMedia(`(prefers-color-scheme: ${localStorage.theme})`).matches) {
-      localStorage.removeItem('theme');
-    }
-  }
+  import { toggleMode, mode } from 'mode-watcher';
 
   // Icons:
   import { MoonIcon, SunIcon } from 'lucide-svelte';
 </script>
 
-<svelte:head>
-  <script>
-    if (
-      localStorage.theme === 'dark' ||
-      (!localStorage.theme && window.matchMedia('(prefers-color-scheme: dark)').matches)
-    ) {
-      document.documentElement.classList.add('dark');
-    } else {
-      document.documentElement.classList.remove('dark');
-    }
-  </script>
-</svelte:head>
-
-<button on:click={toggle} aria-label="Toggle dark mode" class="opacity-80 hover:opacity-100">
-  <!-- moon icon -->
-  {#if dark}
+<button on:click={toggleMode} aria-label="Toggle dark mode" class="opacity-80 hover:opacity-100">
+  {#if $mode === 'light'}
     <SunIcon size={20} strokeWidth={1.5} />
   {:else}
     <MoonIcon size={20} strokeWidth={1.5} />