refactor enrichment to tmdb-only and fix review findings

src/vlm/enrichment.py

@@ -12,7 +12,7 @@ from urllib.request import urlopen, Request
 
 from vlm.cache import EnrichmentCache
 from vlm.config import Config
-from vlm.providers import ProviderResult, TMDBProvider, DoubanProvider
+from vlm.providers import ProviderResult, TMDBProvider
 from vlm.parser import normalize_title
 
 RefreshMode = str
@@ -156,6 +156,7 @@ def _emit_progress(stats: dict[str, int | list[dict[str, str]]], progress_callba
 
 def _build_providers(config: Config, *, request_timeout: int, retries: int) -> list:
     providers = []
+    unsupported: list[str] = []
     for name in config.enrichment_providers:
         key = name.lower()
         if key == "tmdb":
@@ -167,16 +168,14 @@ def _build_providers(config: Config, *, request_timeout: int, retries: int) -> l
                     min_interval_seconds=0.25,
                 )
             )
-        elif key == "douban":
-            providers.append(
-                DoubanProvider(
-                    config.douban_api_key,
-                    endpoint=config.douban_api_endpoint,
-                    timeout_seconds=request_timeout,
-                    retries=retries,
-                    min_interval_seconds=0.4,
-                )
-            )
+        else:
+            unsupported.append(name)
+
+    if unsupported:
+        raise ValueError(
+            f"Unsupported enrichment providers: {unsupported}. Supported providers: ['tmdb']"
+        )
+
     return providers
 
 
@@ -390,7 +389,7 @@ def _apply_payload(record: dict, payload: dict) -> None:
         "provider_metadata",
         "display_title",
     ):
-        if key in payload and payload[key] is not None:
+        if key in payload:
             record[key] = payload[key]
 
     if "needs_review" in payload:
@@ -422,10 +421,16 @@ def _fallback_title_from_filename(filename: Optional[str]) -> Optional[str]:
 
 
 def _build_display_title(record: dict, payload: dict, config: Config) -> str:
-    title_zh = payload.get("title_zh") or record.get("title")
-    title_en = payload.get("title_en") or record.get("title")
+    fallback_title = record.get("title")
+    title_zh = payload.get("title_zh") or fallback_title
+    title_en = payload.get("title_en") or fallback_title
+    if title_zh and title_en and title_zh == title_en:
+        title_en = ""
     try:
-        formatted = config.naming_title_format.format(title_zh=title_zh, title_en=title_en).strip()
+        formatted = config.naming_title_format.format(
+            title_zh=title_zh or "",
+            title_en=title_en or "",
+        ).strip()
     except Exception:
-        formatted = f"{title_zh} {title_en}".strip()
+        formatted = f"{title_zh or ''} {title_en or ''}".strip()
     return " ".join(formatted.split())