Method sendMessages

app/src/utils/ModelManager.ts:731–764

* Send messages to a model by name. Routes local models directly, remote models via fetchResponse.

(
    modelName: string,
    messages: Array<{ role: string; content: any }>,
    token?: string,
    enableStreaming: boolean = false,
    onStreamChunk?: (chunk: string) => void,
    onReasoningChunk?: (chunk: string) => void
  )

   * Send messages to a model by name. Routes local models directly, remote models via fetchResponse.
   */
  public async sendMessages(
    modelName: string,
    messages: Array<{ role: string; content: any }>,
    token?: string,
    enableStreaming: boolean = false,
    onStreamChunk?: (chunk: string) => void,
    onReasoningChunk?: (chunk: string) => void
  ): Promise<string> {
    let modelsResponse = this.listModels();
    let model = modelsResponse.models.find(m => m.name === modelName);
    if (!model) {
      modelsResponse = await this.fetchModels();
      model = modelsResponse.models.find(m => m.name === modelName);
    }
    // Ghost models (agent-creator-only) aren't returned by listModels but are valid on the
    // Observer API — route them there when a token is present.
    if (!model && !token) throw new Error(`Model '${modelName}' not found in available models`);

    const serverAddress = model ? model.server : 'https://api.observer-ai.com:443';

    if (this.isLocalModel(serverAddress)) {
      if (!this.isLocalModelReady(serverAddress)) {
        throw new Error('Local model not loaded. Please load it from the Add Model panel.');
      }
      return this.generateWithLocalModel(serverAddress, messages, onStreamChunk, onReasoningChunk);
    }

    if (serverAddress.includes('api.observer-ai.com') && token) {
      this.optimisticUpdateQuota();
    }
    const { fetchResponse } = await import('./sendApi');
    const params = { ...DEFAULT_INFERENCE_PARAMS, ...this.getModelParams(modelName) };
    return fetchResponse(serverAddress, messages, modelName, token, enableStreaming, onStreamChunk, params, onReasoningChunk);
  }

  /**
   * Tools-aware send path. Returns the full AssistantResponse (content + tool_calls +