Claudian Plus 3.1.1

What's Changed

• fix: release 3.1.1 hardening pass
• docs: credit the diagnoses that shaped 3.1.0
• feat(dsh): show the DeepSeek mark in the header when the provider is active
• fix(chat): keep the tab bar hidden; protect the tab limit without a badge row
• feat(dsh): Safe/YOLO permission toggle auto-approving native tool requests
• fix(chat): tab limit UX — no silent overwrite, visible disabled state, blank tab reuse, tab bar visibility
• fix(chat): fill provider-declared context window for usage chunks without one

Full Changelog: 3.1.0...3.1.1