feat: add enhanced SABnzbd download dashboard with remaining data calculation and visual redesign

Add parse_size_bytes() and format_bytes() helper functions to convert and format file sizes. Calculate total remaining bytes from queue and include active_count, history_count, remaining_bytes, and formatted remaining in downloads API response. Update error responses to include new fields.

Add media-mark.svg favicon with gradient background, golden lines, and green checkmark. Replace text logo with inline

app.py

@@ -4,6 +4,7 @@ import os
 import sqlite3
 import subprocess
 import threading
+import re
 from concurrent.futures import ThreadPoolExecutor
 from datetime import datetime
 from pathlib import Path
@@ -59,6 +60,23 @@ def sab_get(mode, **params):
         raise RuntimeError(data["error"])
     return data
 
+def parse_size_bytes(value):
+    if isinstance(value, (int, float)):
+        return int(value)
+    match = re.search(r"([\d.,]+)\s*(B|KB|MB|GB|TB)", str(value or ""), re.IGNORECASE)
+    if not match:
+        return 0
+    number = float(match.group(1).replace(',', '.'))
+    multiplier = {"B": 1, "KB": 1024, "MB": 1024**2, "GB": 1024**3, "TB": 1024**4}[match.group(2).upper()]
+    return int(number * multiplier)
+
+def format_bytes(size):
+    value = float(size or 0)
+    for unit in ("B", "KB", "MB", "GB", "TB"):
+        if value < 1024 or unit == "TB":
+            return f"{value:.1f} {unit}"
+        value /= 1024
+
 def release_languages(name):
     value = f" {name.lower().replace('.', ' ').replace('-', ' ')} "
     found = []
@@ -90,7 +108,11 @@ def sab_downloads():
 
     items = [make_item(item) for item in queue.get("slots", [])]
     items.extend(make_item(item, completed=True) for item in history.get("slots", [])[:15])
-    return {"items": items, "queue_status": queue.get("status", "Idle"), "speed": queue.get("speed", "0 B/s"), "paused": bool(queue.get("paused_all")), "error": None}
+    remaining_bytes = sum(parse_size_bytes(item.get("sizeleft")) for item in queue.get("slots", []))
+    return {"items": items, "queue_status": queue.get("status", "Idle"), "speed": queue.get("speed", "0 B/s"),
+            "paused": bool(queue.get("paused_all")), "active_count": len(queue.get("slots", [])),
+            "history_count": len(history.get("slots", [])[:15]), "remaining_bytes": remaining_bytes,
+            "remaining": format_bytes(remaining_bytes), "error": None}
 
 def norm_lang(code):
     code = (code or "").strip().lower()
@@ -257,12 +279,12 @@ def scan_status():
 @app.get("/api/downloads")
 def downloads():
     if not SAB_URL or not SAB_API_KEY:
-        return jsonify({"items": [], "queue_status": "Nicht konfiguriert", "speed": "—", "paused": False, "error": "SAB_URL oder SAB_API_KEY ist nicht gesetzt."})
+        return jsonify({"items": [], "queue_status": "Nicht konfiguriert", "speed": "—", "paused": False, "active_count": 0, "history_count": 0, "remaining": "—", "error": "SAB_URL oder SAB_API_KEY ist nicht gesetzt."})
     try:
         return jsonify(sab_downloads())
     except Exception as exc:
         log.exception("SABnzbd konnte nicht abgefragt werden")
-        return jsonify({"items": [], "queue_status": "Fehler", "speed": "—", "paused": False, "error": str(exc)}), 502
+        return jsonify({"items": [], "queue_status": "Fehler", "speed": "—", "paused": False, "active_count": 0, "history_count": 0, "remaining": "—", "error": str(exc)}), 502
 
 @app.get("/health")
 def health(): return jsonify({"ok":True, "radarr_url":RADARR_URL, "sonarr_enabled":bool(SONARR_URL and SONARR_API_KEY), "sab_enabled":bool(SAB_URL and SAB_API_KEY)})