change default theme to dark

frontend/index.html

@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta name="theme-color" content="#e82517" />
     <style>
-      html { background: #fefde7; }
+      html { background: #130d08; }
       html[data-theme="dark"] { background: #130d08; color-scheme: dark; }
       html[data-theme="dark"] body,
       html[data-theme="dark"] #root { background: #130d08; }
@@ -36,7 +36,7 @@
             theme = localStorage.getItem('tssbot.theme')
           } catch {}
         }
-        theme = theme === 'dark' ? 'dark' : 'light'
+        theme = theme === 'light' ? 'light' : 'dark'
         const bg = theme === 'dark' ? '#130d08' : '#fefde7'
 
         document.documentElement.dataset.theme = theme

frontend/src/App.jsx

@@ -548,7 +548,7 @@ function writeCookie(name, value) {
 }
 
 function normalizeThemePreference(value) {
-  return value === 'dark' ? 'dark' : 'light'
+  return value === 'light' ? 'light' : 'dark'
 }
 
 function storedThemePreference() {
@@ -561,7 +561,7 @@ function storedThemePreference() {
   try {
     return normalizeThemePreference(window.localStorage.getItem(themePreferenceKey))
   } catch {
-    return 'light'
+    return 'dark'
   }
 }