Fix Scripture Index doubled/unparseable refs, Titus passage fetch 400, Ko-fi QR 404, auto-load study comments; stop probe URLs inflating Real Hits, real 404 status for unknown URLs; v2.43.1

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

test/hit-paths.test.js

@@ -0,0 +1,15 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import { isKnownSitePath } from '../server/study-helpers.js'
+
+test('real site pages are known paths', () => {
+  for (const p of ['/', '/study', '/study/titus/titus-abc', '/episodes/123', '/salvation', '/scripture', '/privacy']) {
+    assert.equal(isKnownSitePath(p), true, p)
+  }
+})
+
+test('scanner and probe paths are not known paths', () => {
+  for (const p of ['/.env', '/.git/config', '/wp-login', '/actuator/health', '/cgi-bin/x', '/random-path-123']) {
+    assert.equal(isKnownSitePath(p), false, p)
+  }
+})