GitHub PR Title Copier (Improved)

Adds a "Copy" button next to PR title on GitHub (works on navigation)
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// ==UserScript==
// @name         GitHub PR Title Copier (Improved)
// @namespace    http://tampermonkey.net/
// @version      0.5
// @description  Adds a "Copy" button next to PR title on GitHub (works on navigation)
// @match        https://github.com/*/pull/*
// @grant        window.onurlchange
// @license MIT
// ==/UserScript==

(function () {
    'use strict';

    function addCopyButton() {
        const titleEl = document.querySelector('h1[data-component="PH_Title"]');
        if (!titleEl || document.querySelector('#pr-title-copy-btn')) return;

        const titleTextEl = titleEl.querySelector('span');
        if (!titleTextEl) return;

        const copyBtn = document.createElement('button');
        copyBtn.id = 'pr-title-copy-btn';
        copyBtn.textContent = '📋 Copy';
        copyBtn.className = 'btn btn-sm';
        copyBtn.style.marginLeft = '10px';
        copyBtn.style.verticalAlign = 'middle';

        copyBtn.addEventListener('click', async (e) => {
            e.preventDefault();
            try {
                const textToCopy = titleTextEl.textContent.trim();
                await navigator.clipboard.writeText(textToCopy);

                copyBtn.textContent = '✅';
                setTimeout(() => {
                    copyBtn.textContent = '📋 Copy';
                }, 1500);
            } catch (err) {
                console.error('Copy failed:', err);
            }
        });

        titleEl.appendChild(copyBtn);
    }

    document.addEventListener('turbo:load', addCopyButton);

    if (window.onurlchange === null) {
        window.addEventListener('urlchange', () => {
            setTimeout(addCopyButton, 500);
        });
    }

    addCopyButton();

    const observer = new MutationObserver(() => {
        if (!document.querySelector('#pr-title-copy-btn')) {
            addCopyButton();
        }
    });

    observer.observe(document.body, { childList: true, subtree: true });
})();