here's an idea. one solid block of 150 containers containing all range of images should appear in a fixed and auto-fitted manner that will auto-fit on whole window. this code scanning some range in url for specific present images in range available. sometimes urls for images is empty, and this containers will be empty as well. need also to make sure that asynch updating function normally implemented for each cell of images in whole entire grid, to be accurate and not overhead that backend and cause an attention.: 
<!DOCTYPE html>
<html>
<head>
    <title>Auto-Updating Image Gallery</title>
    <style>
        body {
            margin: 0;
            padding: 0;
        }
        
        #gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            grid-gap: 10px;
            align-items: start;
            justify-items: center;
            padding: 20px;
        }
        
        .gallery-image {
            width: 100%;
            height: auto;
        }
        
        #updateButton {
            margin-top: 10px;
        }
    </style>
</head>
<body>
    <div>
        <h1>Auto-Updating Image Gallery</h1>
        <div id='gallery'></div>
        <button id='updateButton' onclick='manualUpdate()'>Manual Update</button>
        <label for='autoUpdate'>Auto-Update:</label>
        <input type='checkbox' id='autoUpdate' onchange='toggleAutoUpdate()' />
    </div>

    <script>
        const gallery = document.getElementById('gallery');
        const autoUpdateCheckbox = document.getElementById('autoUpdate');
        const updateButton = document.getElementById('updateButton');
        const imageUrl = 'https://camenduru-com-webui-docker.hf.space/file=outputs/extras-images/';
        let intervalId;
        
        // Function to fetch and update the gallery
        function updateGallery() {
            gallery.innerHTML = ''; // Clear existing gallery images

            for (let i = 1; i <= 200; i++) {
                const image = new Image();
                const imageSrc = imageUrl + padNumberWithZero(i, 5) + '.png';
                image.src = imageSrc;
                image.classList.add('gallery-image');
                
                image.onerror = () => {
                    // Replace missing image with a backup image if available
                    const missingImageBackupSrc = imageUrl + 'backup.png';
                    image.src = missingImageBackupSrc;
                };

                gallery.appendChild(image);
            }
        }
        
        // Function to pad numbers with leading zeros
        function padNumberWithZero(number, length) {
            let numString = String(number);
            while (numString.length < length) {
                numString = '0' + numString;
            }
            return numString;
        }
        
        // Function to manually update the gallery
        function manualUpdate() {
            clearInterval(intervalId); // Stop auto-update if in progress
            updateGallery();
        }
        
        // Function to toggle auto-update
        function toggleAutoUpdate() {
            if (autoUpdateCheckbox.checked) {
                intervalId = setInterval(updateGallery, 5000); // Auto-update every 5 seconds
                updateButton.disabled = true;
            } else {
                clearInterval(intervalId);
                updateButton.disabled = false;
            }
        }
    </script>
</body>
</html>