async init() {
      const initPromises = [];
      for (const key in this.computed) {
        const valuePromise = this.evaluate(key);
        initPromises.push(valuePromise);
        Object.defineProperty(this.model.data, key, {
          get: () => {
            const computed = this.computed[key];
            return computed.isAsync ? this.asyncCache.get(key) : computed.value;
          },
          enumerable: true,
          configurable: true
        });
      }
      await Promise.all(initPromises);
      for (const key in this.computed) {
        const value = this.computed[key].isAsync ? this.asyncCache.get(key) : this.computed[key].value;
        this.model.dom.updateDOM(key, value);
        this.model.dom.updateInputs(key, value);
      }
      return true;
    }
Sets up computed properties in the model.
- Performs initial evaluation of all computed properties
- Defines getter proxies on model.data
- Makes computed properties enumerable and configurable
- Ensures reactive updates through getter access

@method init