Mouse support (click, scroll, context menu)

[syedazeez337]

Summary

Add mouse interaction support — click to select, scroll to navigate, right-click for context menu.

Motivation

Lowers the learning curve significantly. New users expect mouse interaction. skim and ratatui both support mouse events via crossterm.

Requirements

Mouse Events

• Left click: select item under cursor
• Scroll up/down: navigate list
• Right click: show context menu with available actions
• Double click: trigger default action (describe)
• Drag: future — multi-select range

Context Menu (right-click)

Show available actions based on resource kind:

┌──────────────────────┐
│ Describe       Enter │
│ Logs          Ctrl-L │
│ Exec          Ctrl-E │
│ Delete        Ctrl-D │
│ Port-forward  Ctrl-F │
│ YAML          Ctrl-Y │
│ Scale         Ctrl-S │
│ Edit          Ctrl-W │
│ Diagnose (AI) Ctrl-A │
└──────────────────────┘

• Only show applicable actions (logs only for pods, etc.)
• Dim disabled actions in read-only mode

Config

[ui]
mouse = true                    # enable/disable mouse

Implementation

• skim already captures some mouse events — investigate integration points
• Context menu: render as ratatui overlay widget
• crossterm MouseEvent handling in the event loop

Acceptance Criteria

• Click to select works
• Scroll navigation works
• Right-click context menu shows applicable actions
• Mouse can be disabled in config
• Doesn't interfere with terminal text selection (when disabled)