New Workspace Flow & Tasks Integration

Features

• Restructured new workspace flow with a dedicated Tasks sidebar navigation
• GitHub PR/issue drawer added to the new workspace page
• Create new GitHub issues directly from the Tasks page
• Drag-and-drop files and folders directly onto the composer
• GitHub Copilot CLI is now a supported agent

Improvements

• Improved rich markdown table readability
• Added idempotent E2E test suite with headless Electron support

Fixes

• Contained rich editor crashes and deduped external reloads
• Debounced find-in-page query to stop per-keystroke flashing in the browser
• Refreshed WebGL canvas after resume to prevent frozen terminals
• Fixed terminal Cmd+Left/Right to properly jump to the start/end of the line