Fix broken abcde command: build output_fmt before cmd construction

cmd[-2] was overwriting the -a action value instead of the -o format
value when -P was appended last. Now output_fmt is computed upfront and
the cmd list is built cleanly without post-hoc index manipulation.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/musiksammlung/ripper.py

@@ -296,37 +296,37 @@ def _rip_with_abcde(
     """
     output_dir.mkdir(parents=True, exist_ok=True)
 
+    # Build output format string: "flac" or "flac:-8" (with quality options)
+    encoder_opts = audio_format.get_encoder_options(quality)
+    output_fmt = audio_format.get_abcde_format()
+    if encoder_opts:
+        output_fmt = f"{output_fmt}:{encoder_opts}"
+
     # abcde options:
     # -a actions: cddb+read+encode+tag  (no 'move' — we extract files ourselves)
     # -p: pad track numbers with zeros
-    # -o format: output format
+    # -o format[:options]: output format with optional encoder options
     # -d device: CD drive
     # -x: eject CD after ripping
     # -N: non-interactive (auto-select first CDDB match, no prompts)
+    actions = "cddb,read,encode,tag" if use_cddb else "read,encode"
+
     cmd = [
         "abcde",
+        "-a", actions,
         "-p",
-        "-o", audio_format.get_abcde_format(),
+        "-o", output_fmt,
         "-d", device,
         "-x",
         "-N",
     ]
 
-    if use_cddb:
-        cmd.extend(["-a", "cddb,read,encode,tag"])
-    else:
-        cmd.extend(["-a", "read,encode"])
-
     if parallel_jobs > 1:
         cmd.extend(["-j", str(parallel_jobs)])
 
     if use_pipes:
         cmd.append("-P")
 
-    encoder_opts = audio_format.get_encoder_options(quality)
-    if encoder_opts:
-        cmd[-2] = f"{audio_format.get_abcde_format()}:{encoder_opts}"
-
     print(f"\n  Command: {' '.join(cmd)}", flush=True)
     logger.info("Starting abcde: %s", " ".join(cmd))