v0.7.0

Added

• Enhanced Chat UI — improved message styling with distinct background colors for user, AI, and error messages.
• Thinking Process Display — collapsible "thinking" section in chat responses to show the model's reasoning process.
• Streaming Indicator — visual feedback while the AI is generating a response.
• $fn dropdown — quick selection of common $fn values in the code editor toolbar.
• Chat History Draft — if you start cycling through previous messages and then return to the draft, your unsent text is preserved.
• Dynamic Grid — the XYZ grid now grows automatically based on the model's bounding box (with margin), minimum 50 units.
• Grid Toggle (G key) — toggling grid visibility now correctly applies to dynamically resized grids.
• Agent Timer — elapsed time is shown next to the spinner while the AI is working.

Changed

• Part Label Contrast — improved visibility of part labels against the background.
• Auto-scroll Behavior — chat now smarter about scrolling to new messages vs. preserving scroll position.
• Refactored Codebase — split large ui.rs and compilation.rs files into modular components for better maintainability.
• AI Context Improvements — added physical realism checks in AI instructions.

Fixed

• UI Overlap — Part labels are now hidden when they would overlap with the top viewport toolbar or the left side panel, preventing visual clutter.
• Markdown Rendering — Fixed bold text rendering (**text**) in chat messages and thinking blocks, ensuring inline bolding works correctly and markers are hidden.
• BMesh Transformations — Refactor BMesh transformations to include fallback to CsgMesh on panic.