perf(revenue): server-render the promotion link and stop settling on reads

Opening the 推广收益 tab was slow because every read path ran settlement
and two COUNT aggregates before the browser could show the link.

- profile-revenue.php: the link input now carries a server-rendered value from
  ReferralAttribution::create_link(), so 复制链接 works on first paint instead
  of after a REST round trip
- CommissionLedger::overview() no longer calls lazy_settle_due(); the
  lazy-settlement hook and its static flag are gone. Settlement runs only on
  the existing hourly aksrt_affiliate_settle_due cron, which uses a larger
  batch (100 vs 20) and would otherwise re-run up to 20 locked
  SELECT..FOR UPDATE + write cycles inside a GET request
- ReferralAttribution::rest_me() drops the lazy_settle_due() call and the
  stats() result; stats() itself is deleted — its two COUNTs (one of them
  COUNT(DISTINCT source_user_id)) had no consumer left once the 推广人数 row
  was removed
- credits.js: reads the link from the already-rendered input and only fetches
  /revenue/me for poster config and commission ratio. A failed fetch no longer
  blocks copying — it silently skips the poster enhancement
- tests: the lazy-settlement contract is inverted to assert the read path stays
  read-only and cron stays wired; new assertions pin the server-rendered value
  and the no-COUNT REST payload

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

assets/js/credits.js

@@ -115,6 +115,8 @@
 	}
 
 	// ===== Forward-only affiliate revenue center =====
+	/* 推广链接由 PHP 直出，首屏即可见、可复制；这里只补异步才拿得到的
+	 * 海报配置与佣金比例，取失败也不影响复制。 */
 	function initAffiliateRevenue() {
 		var root = document.querySelector('[data-aksrt-revenue-page]');
 		if (!root || root.dataset.affiliateBound) return;
@@ -123,16 +125,14 @@
 		var copy = root.querySelector('[data-affiliate-copy]');
 		var feedback = root.querySelector('[data-affiliate-feedback]');
 		function setFeedback(text, error) { if (feedback) { feedback.textContent = text; feedback.classList.toggle('is-error', !!error); } }
+		var url = input ? input.value : '';
+		if (copy) copy.disabled = !url;
 		api('/revenue/me').then(function (r) {
-			if (!r.ok) { setFeedback((r.json && r.json.message) || '推广数据加载失败。', true); return; }
+			if (!r.ok) return;
 			var j = r.json || {};
-			if (input) {
-				input.value = j.url || '';
-			}
-			if (copy) copy.disabled = !j.url;
 			var ratio = root.querySelector('[data-affiliate-ratio]'); if (ratio) ratio.textContent = String(j.current_ratio || 0) + '%';
-		initAffiliatePoster(root, j.url || '', j.poster || {}, j.site_name || document.title);
-		}).catch(function () { setFeedback('推广数据加载失败。', true); });
+			initAffiliatePoster(root, url || j.url || '', j.poster || {}, j.site_name || document.title);
+		}).catch(function () { /* 海报与比例为增强项，静默失败即可。 */ });
 		if (copy) copy.addEventListener('click', function () {
 			if (!input || !input.value) return;
 			var done = function () { setFeedback('推广链接已复制。'); };