Add seasonal themes for Birthday, Olympia, Space, Sports, and Underwater: implement CSS and JavaScript for visual effects and configurations

Jellyfin.Plugin.Seasonals/Web/space.js

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+const config = window.SeasonalsPluginConfig?.Space || {};
+
+const space = config.EnableSpace !== undefined ? config.EnableSpace : true;
+const symbolCount = config.SymbolCount || 25;
+const useRandomSymbols = config.EnableRandomSymbols !== undefined ? config.EnableRandomSymbols : true;
+const enableRandomMobile = config.EnableRandomSymbolsMobile !== undefined ? config.EnableRandomSymbolsMobile : false;
+const enableDifferentDuration = config.EnableDifferentDuration !== undefined ? config.EnableDifferentDuration : true;
+
+let msgPrinted = false;
+
+function toggleSpace() {
+  const container = document.querySelector('.space-container');
+  if (!container) return;
+
+  const videoPlayer = document.querySelector('.videoPlayerContainer');
+  const trailerPlayer = document.querySelector('.youtubePlayerContainer');
+  const isDashboard = document.body.classList.contains('dashboardDocument');
+  const hasUserMenu = document.querySelector('#app-user-menu');
+
+  if (videoPlayer || trailerPlayer || isDashboard || hasUserMenu) {
+    container.style.display = 'none';
+    if (!msgPrinted) {
+      console.log('Space hidden');
+      msgPrinted = true;
+    }
+  } else {
+    container.style.display = 'block';
+    if (msgPrinted) {
+      console.log('Space visible');
+      msgPrinted = false;
+    }
+  }
+}
+
+const observer = new MutationObserver(toggleSpace);
+observer.observe(document.body, {
+  childList: true,
+  subtree: true,
+  attributes: true
+});
+
+function createSpace() {
+    const container = document.querySelector('.space-container') || document.createElement('div');
+
+    if (!document.querySelector('.space-container')) {
+        container.className = 'space-container';
+        container.setAttribute("aria-hidden", "true");
+        document.body.appendChild(container);
+    }
+
+    const standardCount = 15;
+    const totalSymbols = symbolCount + standardCount;
+    
+    let isMobile = window.matchMedia("only screen and (max-width: 768px)").matches;
+    let finalCount = totalSymbols;
+
+    if (isMobile) {
+        finalCount = enableRandomMobile ? totalSymbols : standardCount;
+    }
+
+    const useRandomDuration = enableDifferentDuration !== false;
+
+    const activeItems = ['planet1', 'planet2', 'star', 'astronaut', 'rocket'];
+
+    for (let i = 0; i < finalCount; i++) {
+        let symbol = document.createElement('div');
+        
+        const randomItem = activeItems[Math.floor(Math.random() * activeItems.length)];
+        symbol.className = `space-symbol space-${randomItem}`;
+
+        let img = document.createElement('img');
+        img.src = `../Seasonals/Resources/space_images/${randomItem}.png`;
+        img.onerror = function() {
+            this.style.display = 'none';
+            this.parentElement.innerHTML = getSpaceEmojiFallback(randomItem);
+        };
+        symbol.appendChild(img);
+
+        const topPos = Math.random() * 90; // 0 to 90vh
+        const delaySeconds = Math.random() * 10;
+        
+        let durationSeconds = 15;
+        if (useRandomDuration) {
+            durationSeconds = Math.random() * 15 + 15; // 15 to 30 seconds for slow drift
+        }
+
+        // Randomly pick direction: left-to-right OR right-to-left
+        const goRight = Math.random() > 0.5;
+        if (goRight) {
+            symbol.style.animationName = 'space-drift-right';
+            symbol.style.left = '-10vw';
+            symbol.style.transform = 'scaleX(-1)'; // flip some items horizontally if moving right
+        } else {
+            symbol.style.animationName = 'space-drift-left';
+            symbol.style.right = '-10vw';
+        }
+
+        symbol.style.top = `${topPos}vh`;
+        symbol.style.animationDuration = `${durationSeconds}s`;
+        symbol.style.animationDelay = `${delaySeconds}s`;
+
+        // Add a slow rotation
+        symbol.style.setProperty('--rot-dur', `${durationSeconds}s`);
+
+        container.appendChild(symbol);
+    }
+}
+
+function getSpaceEmojiFallback(type) {
+    if (type === 'planet1') return '🪐';
+    if (type === 'planet2') return '🌍';
+    if (type === 'star') return '⭐';
+    if (type === 'astronaut') return '👨‍🚀';
+    if (type === 'rocket') return '🚀';
+    return '✨';
+}
+
+function initializeSpace() {
+  if (!space) return;
+  createSpace();
+  toggleSpace();
+}
+
+initializeSpace();