feat: create server/config with env var settings and quality presets

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/config.py

@@ -0,0 +1,21 @@
+import os
+from pathlib import Path
+
+
+MEDIA_DIRS: list[str] = [
+    d.strip() for d in os.environ.get("MEDIA_DIRS", str(Path.home())).split(",") if d.strip()
+]
+EXPORT_DIR: str = os.environ.get("EXPORT_DIR", str(Path.home() / "8cut-exports"))
+DB_PATH: str = os.environ.get("DB_PATH", str(Path.home() / ".8cut.db"))
+CACHE_DIR: str = os.environ.get("CACHE_DIR", str(Path.home() / ".8cut-cache"))
+HOST: str = os.environ.get("HOST", "0.0.0.0")
+PORT: int = int(os.environ.get("PORT", "8000"))
+
+VIDEO_EXTENSIONS = {".mp4", ".mkv", ".avi", ".mov", ".webm", ".ts", ".flv", ".wmv"}
+
+QUALITY_PRESETS = {
+    "potato": {"height": 480, "bitrate": "500k"},
+    "low":    {"height": 720, "bitrate": "2M"},
+    "medium": {"height": 1080, "bitrate": "5M"},
+    "high":   {"height": 0, "bitrate": "10M"},  # 0 = original resolution
+}