feat: Phase 3 AI Radio (DJ Host & interleaved playlist) and Like/Dislike/Delete actions

- Add Like button: promotes wave track to permanent library and refills buffer
- Add Dislike button: blacklists track in SQLite disliked_tracks, removes audio, refills buffer
- Add Delete button in history table for library file removal
- Add AI Radio module: wttr.in weather, Qwen 2.5 host monologues, speech synthesis, ID3 tags
- Generate interleaved 'AI Радио.m3u8' alongside clean 'Моя Волна.m3u8'
- Update Web UI with Radio DJ card, voice selection, and track actions

app/sync_queue.py

@@ -0,0 +1,131 @@
+import asyncio
+import uuid
+from typing import Dict, List, Optional
+from datetime import datetime
+from pydantic import BaseModel
+
+from app.config import settings
+from app.db import is_track_downloaded, record_downloaded_track
+from app.core.tagger import get_track_dest_path
+from app.core.lyrics import fetch_and_save_lyrics
+from app.core.navidrome import trigger_navidrome_scan
+from app.providers.base import BaseProvider, TrackMetadata
+from app.providers.yandex import YandexMusicProvider
+from app.providers.universal import UniversalProvider
+
+class TaskInfo(BaseModel):
+    id: str
+    target: str
+    status: str  # pending, resolving, downloading, completed, failed
+    progress: int = 0
+    total: int = 0
+    current_item: str = ""
+    error: Optional[str] = None
+    created_at: str
+    updated_at: str
+
+class SyncManager:
+    def __init__(self):
+        self.tasks: Dict[str, TaskInfo] = {}
+        self.yandex_provider = YandexMusicProvider()
+        self.universal_provider = UniversalProvider()
+        self._lock = asyncio.Lock()
+
+    def get_provider(self, url: str) -> BaseProvider:
+        if self.yandex_provider.can_handle(url):
+            return self.yandex_provider
+        return self.universal_provider
+
+    async def start_sync_task(self, target: str) -> TaskInfo:
+        task_id = str(uuid.uuid4())[:8]
+        now = datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S")
+        info = TaskInfo(
+            id=task_id,
+            target=target,
+            status="pending",
+            created_at=now,
+            updated_at=now
+        )
+        self.tasks[task_id] = info
+        asyncio.create_task(self._process_task(task_id, target))
+        return info
+
+    async def _process_task(self, task_id: str, target: str):
+        task = self.tasks[task_id]
+        provider = self.get_provider(target)
+
+        try:
+            task.status = "resolving"
+            task.current_item = "Fetching metadata..."
+            task.updated_at = datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S")
+
+            tracks: List[TrackMetadata] = await provider.resolve(target)
+            task.total = len(tracks)
+
+            if not tracks:
+                task.status = "completed"
+                task.current_item = "No tracks found or URL empty."
+                return
+
+            task.status = "downloading"
+            downloaded_any = False
+
+            for idx, track in enumerate(tracks, start=1):
+                task.progress = idx
+                task.current_item = f"{track.artist} - {track.title}"
+                task.updated_at = datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S")
+
+                # Check if already downloaded
+                if is_track_downloaded(track.service, track.service_id):
+                    continue
+
+                # Destination path
+                dest_path = get_track_dest_path(
+                    settings.MUSIC_DIR,
+                    artist=track.artist,
+                    album=track.album or "Singles",
+                    track_num=track.track_number,
+                    title=track.title,
+                    ext="mp3"
+                )
+
+                # Attempt download
+                success = await provider.download_track(track, dest_path)
+                
+                # If Yandex failed (e.g. censored or region blocked), fallback to universal search
+                if not success and track.service == "yandex":
+                    print(f"Fallback to universal search for: {track.artist} - {track.title}")
+                    success = await self.universal_provider.download_track(track, dest_path)
+
+                if success:
+                    downloaded_any = True
+                    # Fetch synchronized lyrics if enabled
+                    if settings.DOWNLOAD_LYRICS:
+                        query = f"{track.artist} {track.title}"
+                        fetch_and_save_lyrics(dest_path, query)
+
+                    # Save to DB
+                    record_downloaded_track(
+                        service=track.service,
+                        service_id=track.service_id,
+                        artist=track.artist,
+                        title=track.title,
+                        album=track.album or "Singles",
+                        file_path=dest_path
+                    )
+
+            task.status = "completed"
+            task.current_item = f"Finished processing {task.total} tracks."
+            task.updated_at = datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S")
+
+            # Trigger Navidrome scan
+            if downloaded_any:
+                await trigger_navidrome_scan()
+
+        except Exception as e:
+            task.status = "failed"
+            task.error = str(e)
+            task.current_item = f"Error: {e}"
+            task.updated_at = datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S")
+
+sync_manager = SyncManager()