Function upsertDatabases

frontend/src/react/stores/app/database.ts:68–80

(
    databases: Database[]
  )

  // Compose then immutably merge into the by-name cache; returns the composed
  // list so callers can hand it straight back to their consumers.
  const upsertDatabases = async (
    databases: Database[]
  ): Promise<Database[]> => {
    const composed = await composeDatabases(databases);
    set((state) => {
      const next = { ...state.databasesByName };
      for (const db of composed) {
        next[db.name] = db;
      }
      return { databasesByName: next };
    });
    return composed;
  };

  const fetchByName = async (
    name: string,