Terminal Manager + Diagram Export + Speed Improvements

Terminal Manager — view all terminals across every project with color-coded headers, live status indicators, buffer previews, and full-text search

Preview pane with live terminal output — click any terminal to see recent output without leaving the manager

Send commands directly from the manager with quick action buttons for Ctrl+C, Ctrl+D, and Clear

Bulk close terminals — select multiple with checkboxes or use "close idle" to clean up inactive terminals per project

Create new Bash, Claude, Codex, or Gemini terminals in any project from the manager

Diagram Export — export Mermaid and other diagrams to PNG, JPEG, or SVG with high-resolution 2x Retina support

Smarter terminal resource management — inactive terminals release rendering resources and auto-detach background tmux sessions

Faster git status updates — refreshes only when files actually change instead of polling every 10 seconds

Faster file change detection in the editor — instant refresh from file system events instead of polling every 2 seconds

File watchers no longer leak when switching between projects