Add pytest suite, unlimited daily cap, and vocal batch generator.

Tests cover curation, Lyria, queue, and API routes. Setting max_new_songs_per_day to 0 disables the limit; generate-batch runs 20 curated multilingual vocal directions.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/ozan_radio/server.py

@@ -53,11 +53,20 @@ class SettingsPatch(BaseModel):
 def _can_generate_today(cfg: Config) -> tuple[bool, dict]:
     rs = load_radio_settings(lyria_model=cfg.lyria_model)
     stats = today_stats(cfg.output_dir)
-    remaining = rs.limits.max_new_songs_per_day - stats["generated"]
+    cap = rs.limits.max_new_songs_per_day
+    if cap <= 0:
+        return True, {
+            **stats,
+            "max_per_day": 0,
+            "remaining": -1,
+            "unlimited": True,
+        }
+    remaining = cap - stats["generated"]
     return remaining > 0, {
         **stats,
-        "max_per_day": rs.limits.max_new_songs_per_day,
+        "max_per_day": cap,
         "remaining": max(0, remaining),
+        "unlimited": False,
     }