Google AI Studio - Performance & UI Optimization

Advanced performance optimizations for Google AI Studio. Features zero-latency UI, auto-expanding text areas, and reduced browser rendering overhead.

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// ==UserScript==
// @name         Google AI Studio - Performance & UI Optimization
// @namespace    https://aistudio.google.com/
// @version      1.0.2.1
// @description  Advanced performance optimizations for Google AI Studio. Features zero-latency UI, auto-expanding text areas, and reduced browser rendering overhead.
// @author       John
// @match        https://aistudio.google.com/*
// @grant        GM_addStyle
// @run-at       document-start
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    const css = `
        /* 1. RENDERING PIPELINE OPTIMIZATION */
        *, *::before, *::after {
            transition: none !important;
            animation: none !important;
            backdrop-filter: none !important;
            box-shadow: none !important;
            text-shadow: none !important;
        }

        /* 2. INTERFACE COLOR SCHEME (High-Contrast Dark) */
        body,
        mat-sidenav-container,
        mat-sidenav-content,
        .scroll-container,
        .monaco-editor,
        .monaco-editor-background {
            background-color: rgb(25, 25, 25) !important; /* This is #191919 */
            color: #e0e0e0 !important;
        }

        /* 3. GROUNDING TOOL SPACING & COLOR FIX */
        /* Forces the container background to #252525 while preserving button styles */
        .content-container:has(.enabled-tool),
        .enabled-tool {
            background-color: #252525 !important;
            border-radius: 4px !important;
            padding: 4px 8px !important;
        }

        /* 4. CONTENT LAYOUT & SPACING CONTEXT */
        ms-chat-turn,
        .turn-container,
        .history-item {
            background: rgb(25, 25, 25) !important;
            border: none !important;

            /* Spacing Logic: 5px Lateral, 25px Vertical Offset */
            padding-left: 5px !important;
            padding-right: 5px !important;
            padding-top: 25px !important;

            /* Margin Reset for Consistent Vertical Flow */
            margin: 5px !important;
            margin-top: 0px !important;

            /* Rendering Containment */
            contain: layout paint style !important;
            overflow: visible !important;
            display: block !important;
        }

        /* NESTED ELEMENT RESET */
        ms-chat-turn .message-content,
        ms-chat-turn mat-card,
        ms-chat-turn .model-message,
        ms-chat-turn .user-message,
        ms-chat-turn ms-message-content {
            padding: 0 !important;
            margin: 0 !important;
            background: transparent !important;
        }

        /* 5. DYNAMIC INPUT FIELD OPTIMIZATION */
        textarea {
            background-color: rgb(35, 35, 35) !important;
            color: #ffffff !important;
            border: 1px solid #555 !important;
            border-radius: 0px !important;
            padding: 15px !important;
            will-change: contents !important;

            /* Native Layout-based Resizing */
            field-sizing: content !important;
            max-height: 80vh !important;
            min-height: 60px !important;
            height: auto !important;
            resize: none !important;
        }

        /* 6. SYSTEM SCROLLBAR STYLING */
        ::-webkit-scrollbar {
            width: 12px !important;
            background: rgb(25, 25, 25) !important;
        }
        ::-webkit-scrollbar-thumb {
            background: #444 !important;
            border: 1px solid rgb(25, 25, 25) !important;
        }

        /* 7. UI DE-CLUTTERING */
        .sparkle-container, .magic-overlay, .thinking-shimmer {
            display: none !important;
        }

        /* 8. HARDWARE-ACCELERATED COMPOSITING */
        .overflow-y-auto, main {
            will-change: scroll-position !important;
            transform: translateZ(0) !important;
        }
    `;

    const style = document.createElement('style');
    style.textContent = css;
    document.head.append(style);

    // PERFORMANCE ENGINES (Decoupled Scroll & Input Prediction)
    const originalAddEventListener = EventTarget.prototype.addEventListener;
    EventTarget.prototype.addEventListener = function(type, listener, options) {
        if (type === 'wheel' || type === 'mousewheel' || type === 'touchstart' || type === 'touchmove') {
            if (typeof options === 'object') {
                options.passive = true;
            } else {
                options = { passive: true };
            }
        }
        return originalAddEventListener.call(this, type, listener, options);
    };

    const optimizeInput = () => {
        const inputs = document.querySelectorAll('textarea');
        inputs.forEach(el => {
            if (el.getAttribute('spellcheck') !== 'false') {
                el.setAttribute('spellcheck', 'false');
                el.setAttribute('autocomplete', 'off');
            }
        });
    };

    window.addEventListener('click', optimizeInput, { passive: true });
    window.addEventListener('focus', optimizeInput, { passive: true, capture: true });

    console.log("AI Studio Performance Suite: Initialized.");

})();