refactor: Add MediaRenderers, MediaUtils, MetadataPanel, and ShowcaseView components for enhanced media handling in showcase

- Implemented MediaRenderers.js to generate HTML for video and image wrappers, including NSFW handling and media controls.
- Created MediaUtils.js for utility functions to manage media loading, lazy loading, and metadata panel interactions.
- Developed MetadataPanel.js to generate metadata panels for media items, including prompts and generation parameters.
- Introduced ShowcaseView.js to render showcase content, manage media items, and handle file imports with drag-and-drop support.

static/js/components/shared/showcase/MetadataPanel.js

@@ -0,0 +1,83 @@
+/**
+ * MetadataPanel.js
+ * Generates metadata panels for showcase media items
+ */
+
+/**
+ * Generate metadata panel HTML
+ * @param {boolean} hasParams - Whether there are generation parameters
+ * @param {boolean} hasPrompts - Whether there are prompts
+ * @param {string} prompt - Prompt text
+ * @param {string} negativePrompt - Negative prompt text
+ * @param {string} size - Image size
+ * @param {string} seed - Generation seed
+ * @param {string} model - Model used
+ * @param {string} steps - Steps used
+ * @param {string} sampler - Sampler used
+ * @param {string} cfgScale - CFG scale
+ * @param {string} clipSkip - Clip skip value
+ * @returns {string} HTML content
+ */
+export function generateMetadataPanel(hasParams, hasPrompts, prompt, negativePrompt, size, seed, model, steps, sampler, cfgScale, clipSkip) {
+    // Create unique IDs for prompt copying
+    const promptIndex = Math.random().toString(36).substring(2, 15);
+    const negPromptIndex = Math.random().toString(36).substring(2, 15);
+    
+    let content = '<div class="image-metadata-panel"><div class="metadata-content">';
+    
+    if (hasParams) {
+        content += `
+            <div class="params-tags">
+                ${size ? `<div class="param-tag"><span class="param-name">Size:</span><span class="param-value">${size}</span></div>` : ''}
+                ${seed ? `<div class="param-tag"><span class="param-name">Seed:</span><span class="param-value">${seed}</span></div>` : ''}
+                ${model ? `<div class="param-tag"><span class="param-name">Model:</span><span class="param-value">${model}</span></div>` : ''}
+                ${steps ? `<div class="param-tag"><span class="param-name">Steps:</span><span class="param-value">${steps}</span></div>` : ''}
+                ${sampler ? `<div class="param-tag"><span class="param-name">Sampler:</span><span class="param-value">${sampler}</span></div>` : ''}
+                ${cfgScale ? `<div class="param-tag"><span class="param-name">CFG:</span><span class="param-value">${cfgScale}</span></div>` : ''}
+                ${clipSkip ? `<div class="param-tag"><span class="param-name">Clip Skip:</span><span class="param-value">${clipSkip}</span></div>` : ''}
+            </div>
+        `;
+    }
+    
+    if (!hasParams && !hasPrompts) {
+        content += `
+            <div class="no-metadata-message">
+                <i class="fas fa-info-circle"></i>
+                <span>No generation parameters available</span>
+            </div>
+        `;
+    }
+    
+    if (prompt) {
+        content += `
+            <div class="metadata-row prompt-row">
+                <span class="metadata-label">Prompt:</span>
+                <div class="metadata-prompt-wrapper">
+                    <div class="metadata-prompt">${prompt}</div>
+                    <button class="copy-prompt-btn" data-prompt-index="${promptIndex}">
+                        <i class="fas fa-copy"></i>
+                    </button>
+                </div>
+            </div>
+            <div class="hidden-prompt" id="prompt-${promptIndex}" style="display:none;">${prompt}</div>
+        `;
+    }
+    
+    if (negativePrompt) {
+        content += `
+            <div class="metadata-row prompt-row">
+                <span class="metadata-label">Negative Prompt:</span>
+                <div class="metadata-prompt-wrapper">
+                    <div class="metadata-prompt">${negativePrompt}</div>
+                    <button class="copy-prompt-btn" data-prompt-index="${negPromptIndex}">
+                        <i class="fas fa-copy"></i>
+                    </button>
+                </div>
+            </div>
+            <div class="hidden-prompt" id="prompt-${negPromptIndex}" style="display:none;">${negativePrompt}</div>
+        `;
+    }
+    
+    content += '</div></div>';
+    return content;
+}