feat(quantic): curs NLP Quantic (curs/34) - audio pentru telefon

- courses.py: curs "quantic" (shop.cursnlp.ro/curs/34, root nlp-quantic/)
- download.py: yt-dlp cu 8 fragmente paralele + fara progress bar
- rename_phone_quantic.py: copii MP3 cu ID3 (titlu, album per modul, track) + coperta
- rename_phone_practitioner.py: font fallback Linux, an pe coperta din YEAR
- nlp-quantic/: coperti M1-M5, pagina index.html pentru descarcare pe telefon, PDF-uri rezumat

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017NC1T6XwMepWVPuGZELZtT

courses.py

@@ -28,6 +28,15 @@ COURSES = {
         "env_pass": "PRACTITIONER_PASSWORD",
         "root": Path("nlp-practitioner"),
     },
+    "quantic": {
+        "name": "NLP Quantic (cursnlp.ro)",
+        "base_url": "https://shop.cursnlp.ro",
+        "course_path": "/curs/34",
+        "login_path": "/login",
+        "env_user": "PRACTITIONER_USERNAME",
+        "env_pass": "PRACTITIONER_PASSWORD",
+        "root": Path("nlp-quantic"),
+    },
 }