- llm_launch_check_api.dspy: add check_charging action
* Takes usages JSON from inference result
* Calls env.buffered_charging(ppid, usages) to verify pricing works
* Returns pricing breakdown with amounts and costs
- llm_launch_check.ui: add '检查计费' button
* Appears after successful inference
* Passes usage data to check_charging API
* Displays pricing calculation results
- llm_launch_check_api.dspy: simplify inference action
* Direct uapi.call() instead of full inference pipeline
* Extracts usage from response without writing to database