fix: separate -map_metadata and -map_chapters options from their values in x265 transcoding

tests/quick-logic-test.js

@@ -200,6 +200,8 @@ const AUDIO_INPUTS = {
   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');
+  ok(!transcodeCode.includes("'-map_metadata -1'"), 'pass 1 separates -map_metadata from its value');
+  ok(!transcodeCode.includes("'-map_chapters -1'"), 'pass 1 separates -map_chapters from its value');
 
   // ── Summary ───────────────────────────────────────────────────────────────
   console.log(`\n${'='.repeat(55)}`);