Add Image Blackout plugin (#693)

plugins/ImageBlackout/README.md

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+# Image Blackout (100% Work Safe)
+
+Simple toggle button in the navbar that completely hides all images, videos, hover previews, scrubber sprites, and AI tagger images.
+
+Click 🖼️ to turn black-out on/off.

plugins/ImageBlackout/image-blackout.js

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+(function() {
+  let enabled = false;
+  const cssId = 'image-blackout-style';
+
+  const blackoutCSS = `img, video, .card-image, .card-image-container, .scene-card-preview-video, .scene-card-preview-image, .scene-scrubber, .scrubber, .scrubber-sprites, .scrubber-viewport, .preview-strip, .tag-card img, .tag-image, .tag-thumbnail, .sprite, .sprites, .sprite-image, .scrubber-sprite, .scrubber-item, [class*="svelte-1d03wug"], .ai-tagger, .ai-tag, .tagger-preview, [class*="sprite"], [class*="preview"], .performer-card img, .scene-card img, .gallery-card img, .hover-card, [class*="hover"] { display: none !important; visibility: hidden !important; background-image: none !important; }`;
+
+  function createButton() {
+    const nav = document.querySelector('.navbar-nav');
+    if (!nav || document.getElementById('blackout-btn')) return;
+
+    const btn = document.createElement('button');
+    btn.id = 'blackout-btn';
+    btn.textContent = '🖼️';
+    btn.style.margin = '0 4px';
+    btn.style.padding = '2px 8px';
+    btn.style.border = 'none';
+    btn.style.borderRadius = '4px';
+    btn.style.cursor = 'pointer';
+    btn.style.backgroundColor = '#6c757d';
+    btn.style.color = 'white';
+    btn.style.fontSize = '16px';
+
+    btn.onclick = function() {
+      enabled = !enabled;
+      if (enabled) {
+        if (!document.getElementById(cssId)) {
+          const style = document.createElement('style');
+          style.id = cssId;
+          style.innerHTML = blackoutCSS;
+          document.head.appendChild(style);
+        }
+        btn.style.backgroundColor = '#28a745';
+      } else {
+        document.getElementById(cssId)?.remove();
+        btn.style.backgroundColor = '#6c757d';
+      }
+    };
+
+    nav.appendChild(btn);
+  }
+
+  createButton();
+  const observer = new MutationObserver(createButton);
+  observer.observe(document.body, { childList: true, subtree: true });
+})();

plugins/ImageBlackout/image-blackout.yml

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+name: Image Blackout (100% Work Safe)
+description: Toggle button to completely hide all images, videos, hovers, scrubber sprites, tags, and AI previews
+version: 1.0
+ui:
+  javascript:
+    - image-blackout.js