Implement full media crawler workflow with Flask backend and Vue frontend.

Add TMDB search and media detail pages, HDHive resource ingestion flow, unified error handling, Docker single-container runtime, and project docs/config updates for local deployment.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/adapters/emby_adapter.py

@@ -0,0 +1,23 @@
+from config import Config
+from http_client import request_json
+
+
+def _headers():
+    headers = {"Content-Type": "application/json"}
+    if Config.EMBY_TOKEN:
+        headers["X-Emby-Token"] = Config.EMBY_TOKEN
+    return headers
+
+
+def exists_by_tmdb_id(tmdb_id):
+    url = f"{Config.EMBY_BASE_URL}/Items?AnyProviderIdEquals=Tmdb.{tmdb_id}&Recursive=true&Limit=1"
+    result = request_json(
+        url,
+        headers=_headers(),
+        max_retry=Config.MAX_RETRY,
+        retry_delay_ms=Config.RETRY_DELAY_MS,
+        provider="emby",
+    )
+    total = ((result.get("data") or {}).get("TotalRecordCount")) or 0
+    result["exists"] = total > 0
+    return result