ChatKnot v0.3.1

Context Usage Indicator — Visual progress ring in chat composer shows how much context window is used, with color changes at 70% and 90% thresholds.

Chat UI Improvements — Better Markdown rendering, improved scrolling stability, refined thinking animations with millisecond-accurate timing, and permanent request metadata storage.

Stability & Tests — Fixed various edge cases, added comprehensive regression tests, and scoped TypeScript checks to avoid scanning SDK files.