Add test suite for misc.lua utility functions

Overview

The misc.lua module (~94 lines) contains miscellaneous utility functions with no test coverage.

Functions Needing Tests

Slides Presentation

• slides() - Present note as slides
  • Test: checks for slides executable
  • Test: shows error when slides not found
  • Test: handles no file in buffer
  • Test: saves file if modified
  • Test: opens slides in terminal tab
  • Test: handles unsaved changes dialog
  • Test: handles user canceling save
  • Test: executes correct slides command

Update Command

• update() - Run zk update
  • Test: finds .zk directory
  • Test: shows error when .zk not found
  • Test: executes zk update command
  • Test: captures command output
  • Test: shows output in quickfix list
  • Test: shows success notification
  • Test: shows error notification on failure
  • Test: handles zk command not found

Edge Cases

• slides executable in PATH vs not available
• File with unsaved changes
• File not on disk yet (unnamed buffer)
• zk update with errors in output
• Very large zk update output
• Concurrent zk update calls

Test File Location

tests/zk-extras/misc_spec.lua

Priority

Low - Less critical functionality but still needs coverage

Notes

• Slides testing may need mocking of terminal commands
• zk update testing may need mocking of system calls