feat: flat design Sunset Glitch + download manager + settings + recommendations overhaul

- Sunset Glitch color palette applied to all templates
- Font Awesome icons throughout UI
- Download manager with parallel queue and progress tracking
- Settings page with dynamic configuration
- Recommendations router enhanced with scoring
- Local vendor libs (Alpine.js, HTMX) for offline support
- Auto test suite with screenshots
- Series releases list component
- New download model

app/routers/router_settings.py

@@ -1,6 +1,8 @@
 """Application settings routes for Ohm Stream Downloader API"""
 
 import json
+import logging
+from pathlib import Path
 from typing import List, Dict, Any, Optional
 from fastapi import APIRouter, Depends, HTTPException, Request, Response
 from fastapi.templating import Jinja2Templates
@@ -13,10 +15,74 @@ from app.routers.router_auth import get_current_user_from_token, get_optional_us
 from app.providers import get_anime_providers, get_series_providers
 from app.providers_manager import providers_manager
 
+logger = logging.getLogger(__name__)
+
 router = APIRouter(prefix="/api/settings", tags=["settings"])
 templates = Jinja2Templates(directory="templates")
 
 
+def _compute_auto_weights(download_dir: str) -> Dict[str, Any]:
+    """Analyze downloaded files to compute anime vs series ratio.
+
+    Uses filename conventions:
+    - Series: contains "Saison" or "Season" keywords
+    - Anime: everything else in the downloads folder
+    Returns dict with counts and computed weights.
+    """
+    base = Path(download_dir)
+    if not base.exists():
+        return {"anime_count": 0, "series_count": 0, "anime_weight": 1, "series_weight": 1, "total": 0}
+
+    anime_count = 0
+    series_count = 0
+
+    for f in base.rglob("*"):
+        if not f.is_file():
+            continue
+        if f.suffix.lower() not in (".mp4", ".mkv", ".avi", ".wmv", ".flv", ".mov"):
+            continue
+
+        name = f.stem.lower()
+        # Heuristic: series TV files often have "Saison" or "Season" + number
+        # Anime files rarely use this format (they use "Episode" or "S01E01")
+        import re
+        if re.search(r'(?:saison|season)\s*\d+', name):
+            series_count += 1
+        else:
+            anime_count += 1
+
+    total = anime_count + series_count
+    if total == 0:
+        return {"anime_count": 0, "series_count": 0, "anime_weight": 1, "series_weight": 1, "total": 0}
+
+    # Compute weights: proportional to download count, minimum 1
+    if anime_count == 0:
+        aw, sw = 0, 1
+    elif series_count == 0:
+        aw, sw = 1, 0
+    else:
+        # Keep weights small (max 5) for reasonable interleaving
+        ratio = anime_count / series_count
+        if ratio >= 4:
+            aw, sw = 4, 1
+        elif ratio >= 2:
+            aw, sw = 2, 1
+        elif ratio >= 1:
+            aw, sw = 1, 1
+        elif ratio >= 0.5:
+            aw, sw = 1, 2
+        else:
+            aw, sw = 1, 4
+
+    return {
+        "anime_count": anime_count,
+        "series_count": series_count,
+        "anime_weight": aw,
+        "series_weight": sw,
+        "total": total,
+    }
+
+
 @router.get("", response_model=AppSettings)
 async def get_settings(
     current_user: User = Depends(get_current_user_from_token),
@@ -44,6 +110,9 @@ async def get_settings(
         anime_enabled=getattr(settings_obj, 'anime_enabled', True),
         series_enabled=getattr(settings_obj, 'series_enabled', True),
         download_dir=getattr(settings_obj, 'download_dir', 'downloads'),
+        content_weight_mode=getattr(settings_obj, 'content_weight_mode', 'auto'),
+        content_weight_anime=getattr(settings_obj, 'content_weight_anime', 2),
+        content_weight_series=getattr(settings_obj, 'content_weight_series', 1),
     )
 
 
@@ -86,6 +155,12 @@ async def update_settings(
         settings_obj.series_enabled = update_data.series_enabled
     if update_data.download_dir is not None:
         settings_obj.download_dir = update_data.download_dir
+    if update_data.content_weight_mode is not None:
+        settings_obj.content_weight_mode = update_data.content_weight_mode
+    if update_data.content_weight_anime is not None:
+        settings_obj.content_weight_anime = update_data.content_weight_anime
+    if update_data.content_weight_series is not None:
+        settings_obj.content_weight_series = update_data.content_weight_series
 
     session.add(settings_obj)
     session.commit()
@@ -98,6 +173,34 @@ async def update_settings(
     return settings_obj
 
 
+@router.get("/content-weight")
+async def get_content_weight(
+    current_user: User = Depends(get_current_user_from_token),
+    session: Session = Depends(get_session),
+):
+    """Get current effective content weights (auto-computed or manual)"""
+    statement = select(AppSettingsTable).where(
+        AppSettingsTable.user_id == current_user.id
+    )
+    settings_obj = session.exec(statement).first()
+    download_dir = getattr(settings_obj, 'download_dir', 'downloads') if settings_obj else 'downloads'
+    mode = getattr(settings_obj, 'content_weight_mode', 'auto') if settings_obj else 'auto'
+
+    if mode == "auto":
+        weights = _compute_auto_weights(download_dir)
+        weights["mode"] = "auto"
+        return weights
+    else:
+        return {
+            "mode": "manual",
+            "anime_weight": getattr(settings_obj, 'content_weight_anime', 2),
+            "series_weight": getattr(settings_obj, 'content_weight_series', 1),
+            "anime_count": None,
+            "series_count": None,
+            "total": None,
+        }
+
+
 @router.get("/providers/availability")
 async def get_providers_availability(
     current_user: User = Depends(get_current_user_from_token),