Feature: Split-screen view for multiple sessions (Tiling Window Manager) #15

Description

Implement a tiling window manager interface to view and interact with multiple Claude sessions simultaneously, similar to tmux or terminal multiplexers.

Current Problem

• Can only view one session at a time
• Constant switching between sessions is inefficient
• No way to monitor multiple sessions simultaneously
• Difficult to compare outputs or work across sessions

Proposed Solution

Layout Options

• Horizontal Split: Sessions side by side
• Vertical Split: Sessions stacked
• Grid Layout: 2x2, 3x3, etc.
• Custom Layout: Drag to resize panes
• Focus Mode: Temporary maximize one pane

Features

• Dynamic Tiling: Add/remove sessions from view
• Synchronized Scrolling: Option to scroll all panes together
• Pane Management:
  • Resize panes by dragging borders
  • Swap pane positions
  • Quick maximize/restore
  • Close pane without ending session

Keyboard Controls

• Alt+Arrow: Navigate between panes
• Alt+Enter: Maximize current pane
• Alt+Number: Focus pane by number
• Alt+|: Split vertically
• Alt+-: Split horizontally
• Alt+W: Close current pane

Session Bar

• Mini toolbar showing all active sessions
• Drag sessions into view
• Quick preview on hover
• Activity indicators for background sessions

Advanced Features

• Saved Layouts: Save and restore window arrangements
• Broadcast Input: Send commands to multiple sessions
• Linked Scrolling: Synchronize scroll position
• Picture-in-Picture: Float small session over main
• Session Recording: Record all visible sessions together

Use Cases

• Monitor multiple deployments
• Compare outputs from different environments
• Run parallel tasks with visual feedback
• Teaching/demonstration with multiple examples
• DevOps monitoring multiple servers

Implementation Considerations

• Use CSS Grid or Flexbox for responsive layouts
• Lazy load inactive sessions for performance
• WebSocket multiplexing for multiple streams
• Local storage for layout preferences
• Handle session disconnect/reconnect gracefully

Benefits

• Massive productivity boost for multi-tasking
• Better monitoring capabilities
• Reduced context switching
• Professional terminal multiplexer experience
• Improved collaboration when sharing screen