pi-synthetic v0.30.0

d38c88e: Support the plan-based weekly quota window. New Synthetic plans report planWeeklyLimit (percent-based weekly credits) instead of weeklyTokenLimit/rollingFiveHourLimit; the usage bar, quota warnings, history, and refill projections now render and track it. The subscription quota field is no longer read or stored.

228b246: Replay DeepSeek-V4.1-Flash and DeepSeek-V4.1-Flash-1017 OpenAI thinking under reasoning_content when it was streamed under reasoning, without changing saved session history. This preserves reasoning on tool-enabled requests; server-side preservation without tool declarations remains model-dependent. Other models and Anthropic requests are unchanged.