v0.117.0: Members settings page, Individual plans, billing address at checkout, and CLI stability fixes

- Individual plans - Self-serve plans are now grouped under Individual, with smoother loading states (Factory App)
- Sharper LLM error classification - Overloaded and context-length errors now surface as their own error types

Bug fixes

- Execute summary while streaming - Execute tool summary is now hidden while a response is still streaming
- Chat log polish - Minor visual fixes to the chat log
- /missions reminder in Mission Mode - The /missions system reminder no longer shows when you're already in Mission Mode
- Empty template cloud session - Submitting a cloud session with an empty template now works (Factory App)
- Thinking signature recovery - Improved recovery from interrupted thinking signatures