Enable scrolling in task detail view with j/k keys and mouse wheel

[bborn]

Summary

• Added j/k key scrolling (vim-style) in task detail view
• Added mouse wheel scrolling in task detail view
• Updated help text to show available scroll methods

Changes

Previously, the task detail pane viewport was only scrollable with PgUp/PgDn keys. Users naturally expected to use j/k keys and mouse wheel for scrolling, but these were not working.

Key changes:

1. Removed j/k key blocking in updateDetail() to enable vim-style scrolling
2. Added mouse event routing to detail view for mouse wheel support
3. Updated help text to show "j/k/wheel" as scroll options

The viewport component from Bubble Tea already supported these inputs, but they were being blocked at the app routing level.

How it works

• Mouse wheel scrolling: Mouse events are now passed to the detail view's viewport while preserving tmux's native pane-clicking functionality (which operates at the tmux level)
• j/k scrolling: These keys are no longer blocked and are passed to the viewport's default key bindings

Navigation remains unchanged

• Arrow keys (↑/↓) still navigate between tasks
• j/k now scroll within the current task's content
• Mouse clicks on tmux panes still switch between panes (handled by tmux)

Test plan

• Code compiles successfully
• Verify j/k keys scroll the detail view content
• Verify mouse wheel scrolls the detail view content
• Verify arrow keys still navigate between tasks
• Verify clicking on tmux panes still switches focus

🤖 Generated with Claude Code