fix: enhance 2-pass x265 encoding to copy compatible HEVC video below specified bitrate limit

tests/quick-logic-test.js

@@ -197,6 +197,9 @@ const AUDIO_INPUTS = {
   ok(transcodeCode.includes('`-b:a:${audioTrackOut}`'), 'buildAudioArgs uses indexed -b:a:N (not global -b:a)');
   ok(transcodeCode.includes('[...mapArgs, ...codecArgs]'), 'buildAudioArgs: maps first, then codec settings');
   ok(!transcodeCode.includes("'-c:a', 'libopus'"), 'no unindexed -c:a in buildAudioArgs');
+  ok(transcodeCode.includes('bitrateKbps < copyHevcBelowKbps'), 'HEVC copy requires bitrate strictly below the limit');
+  ok(transcodeCode.includes("copyHevcBelowKbps || '3000'"), 'HEVC copy limit defaults to 3000 kbps');
+  ok(transcodeCode.includes("'-c:v', 'copy'"), 'compatible HEVC video uses stream copy');
 
   // ── Summary ───────────────────────────────────────────────────────────────
   console.log(`\n${'='.repeat(55)}`);