fix: normalize bilingual style names to strings so /portal dashboard renders

lib/storage.ts

@@ -86,6 +86,24 @@ function queueWrite(task: () => Promise<void> | void): Promise<void> {
 /**
  * Load all records from disk safely with automatic backup recovery
  */
+/**
+ * Style names became bilingual objects ({ en, zh }); older/newer records may store
+ * either a plain string or that object. Always expose a plain string to the portal UI.
+ */
+function toPlainStyleName(name: unknown): string {
+  if (typeof name === "string") return name;
+  if (name && typeof name === "object") {
+    const n = name as { en?: string; zh?: string };
+    if (n.en && n.zh) return `${n.en} · ${n.zh}`;
+    return n.en || n.zh || "Unknown Disguise";
+  }
+  return "Unknown Disguise";
+}
+
+function normalizeRecordStyleName(r: GenerationRecord): GenerationRecord {
+  return { ...r, styleName: toPlainStyleName(r.styleName) };
+}
+
 export function getAllRecords(): GenerationRecord[] {
   ensureDirectories();
   try {
@@ -98,7 +116,7 @@ export function getAllRecords(): GenerationRecord[] {
       console.warn("[Storage] records.json is not an array, attempting backup recovery...");
       return recoverFromBackup();
     }
-    return parsed;
+    return parsed.map(normalizeRecordStyleName);
   } catch (err) {
     console.error("[Storage] JSON parse error in records.json, attempting backup recovery:", err);
     return recoverFromBackup();
@@ -117,7 +135,7 @@ function recoverFromBackup(): GenerationRecord[] {
         console.warn("[Storage] Successfully recovered records from records.json.bak!");
         // Re-write valid records back to records.json
         fs.writeFileSync(RECORDS_FILE, backupRaw, "utf8");
-        return parsed;
+        return parsed.map(normalizeRecordStyleName);
       }
     }
   } catch (backupErr) {
@@ -302,7 +320,7 @@ export async function logGenerationEvent(data: {
     timestamp: now.toISOString(),
     dateStr,
     styleId: data.styleId,
-    styleName: data.styleName,
+    styleName: toPlainStyleName(data.styleName),
     provider: data.provider,
     model: data.model,
     durationMs: data.durationMs,