feat(identity): web metadata enrichment for titles missing on TMDB (META-1)

- metadata.enrich (propose, low, replay safe): normalized-title cache (kv_cache
  region enrich, 7 days) -> daily budget -> web.search (title + 短剧 / 电视剧 平台,
  second query limited to whitelist via site:) -> web.fetch of up to 3 relevant
  whitelisted pages (registered site domains never read, redirects out of the
  whitelist dropped) -> upstream model extraction with rule fallback -> server-side
  evidence check (rule_confirmed / multi_evidence / needs_review). Suggestion only.
- POST /identity-pool/{id}/enrich (suggest) and /enrich/apply (console session):
  provisional entity or same-title merge, season/episode units, field-level
  metadata with source web/agent + evidence, aliases, release assignment.
  Poster proxy GET /img/enrich/{id} (og:image from whitelisted pages only).
- Auto-enrich once per pool entry when subscription/rule lookups find nothing on
  TMDB (identity.autoEnrich, off by default); identity.enrichDailyBudget,
  identity.enrichDomains settings; web.fetch now returns og:image.
- Pool sheet "元数据补全" section; entity detail shows evidence links.
- Migration 0049_enrichment (metadata_enrichment, metadata_field.evidence, source
  web). Requires image rebuild / api + worker restart to take effect.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/routes/console/library.$id.tsx

@@ -13,6 +13,7 @@ import {
   CalendarClock,
   CalendarPlus,
   ChevronRight,
+  ExternalLink,
   FolderTree,
   GitMerge,
   Lock,
@@ -249,6 +250,44 @@ function IdentityRow({ i }: { i: ExternalIdentity }) {
 }
 
 // ── 元数据字段来源与锁 ──
+
+const ENRICH_ONLY_FIELDS = new Set<string>(["platform", "episodeCount", "genres", "posterUrl"]);
+
+/** META-1 补全写入的字段:证据等级 + 出处网页(来源 web = 网页原文,agent = Agent 归纳,都不是 TMDB) */
+function EvidenceLine({ field }: { field: MediaEntityDetail["metadataFields"][number] | undefined }) {
+  const ev = field?.evidence;
+  if (!ev) return null;
+  let host: string | null = null;
+  try {
+    host = ev.sourceUrl ? new URL(ev.sourceUrl).hostname.replace(/^www\./, "") : null;
+  } catch {}
+  return (
+    <p className="flex flex-wrap items-center gap-x-1.5 text-meta text-muted-foreground">
+      <span>证据 {evidenceLabel(ev.evidenceLevel)}</span>
+      {ev.sourceUrl && host ? (
+        <a
+          href={ev.sourceUrl}
+          target="_blank"
+          rel="noreferrer noopener"
+          className="inline-flex items-center gap-1 break-all underline-offset-4 hover:text-foreground hover:underline"
+        >
+          {host}
+          <ExternalLink className="h-3 w-3 shrink-0" />
+        </a>
+      ) : (
+        <span>无出处</span>
+      )}
+      {field?.field === "posterUrl" && ev.enrichmentId ? (
+        <img
+          src={`/api/v1/img/enrich/${ev.enrichmentId}`}
+          alt="海报"
+          loading="lazy"
+          className="mt-1 h-24 w-auto rounded-tight border border-border object-cover"
+        />
+      ) : null}
+    </p>
+  );
+}
 function MetadataPanel({ detail, entity }: { detail: LibraryDetail; entity: MediaEntityDetail | undefined }) {
   const id = detail.entity.id;
   const refresh = useRefreshMetadata(id);
@@ -256,10 +295,13 @@ function MetadataPanel({ detail, entity }: { detail: LibraryDetail; entity: Medi
   const [editing, setEditing] = useState<EntityMetadataField | null>(null);
   const locks = new Set(detail.metadataSources.fieldLocks);
   const fields = detail.metadataSources.fields;
-  const finals = FieldEnum.options.map((f) => {
-    const parsed = FinalFieldValue.safeParse(fields[f]);
-    return { field: f, final: parsed.success ? parsed.data : null, locked: locks.has(f) };
-  });
+  const finals = FieldEnum.options
+    .map((f) => {
+      const parsed = FinalFieldValue.safeParse(fields[f]);
+      return { field: f, final: parsed.success ? parsed.data : null, locked: locks.has(f) };
+    })
+    // 补全专有字段(平台 / 集数 / 类型 / 网页海报)只在有值时显示
+    .filter((x) => x.final || !ENRICH_ONLY_FIELDS.has(x.field));
   const candidatesOf = (f: string) => (entity?.metadataFields ?? []).filter((m) => m.field === f);
   const current = editing ? finals.find((x) => x.field === editing)?.final?.value : undefined;
 
@@ -292,7 +334,15 @@ function MetadataPanel({ detail, entity }: { detail: LibraryDetail; entity: Medi
               <div className="w-24 shrink-0 pt-0.5 text-meta text-muted-foreground">{ENTITY_FIELD_LABEL[field]}</div>
               <div className="min-w-0 flex-1 basis-48">
                 <p className="text-sm break-words text-foreground">
-                  {final ? String(final.value ?? "—") : <span className="text-muted-foreground">未提供</span>}
+                  {final ? (
+                    Array.isArray(final.value) ? (
+                      final.value.join("、")
+                    ) : (
+                      String(final.value ?? "—")
+                    )
+                  ) : (
+                    <span className="text-muted-foreground">未提供</span>
+                  )}
                 </p>
                 {final ? (
                   <p className="text-meta text-muted-foreground">
@@ -300,6 +350,7 @@ function MetadataPanel({ detail, entity }: { detail: LibraryDetail; entity: Medi
                     {final.language ? ` · ${final.language}` : ""} · {relTime(final.at)}
                   </p>
                 ) : null}
+                {final ? <EvidenceLine field={cands.find((c) => c.source === final.source)} /> : null}
                 {cands.length ? (
                   <p className="mt-0.5 text-meta break-words text-muted-foreground">
                     候选：