Add integration test suite for end-to-end workflows

Overview

While unit tests cover individual modules, we need integration tests for complete user workflows.

Workflows to Test

1. Note Creation from Visual Selection

Workflow: Select text → :ZkNewFromTitle → Pick template → Note created

• Test: Complete workflow with telescope picker
• Test: Complete workflow with fzf picker
• Test: Complete workflow with vim.ui.select
• Test: Handles template variable expansion
• Test: Creates note in correct location
• Test: Opens new note in buffer

Workflow: Select text → :ZkNewFromContent → Pick template → Enter title → Note created

• Test: Complete workflow
• Test: Selected text becomes note content
• Test: Template variables expanded
• Test: Note created with proper frontmatter

2. Snippet Insertion

Workflow: :ZkSnippet → Pick snippet → Snippet inserted with expansion

• Test: Variables expanded correctly
• Test: Inserted at cursor position
• Test: Multiple snippets in same buffer
• Test: Undo works correctly

3. Note Deletion

Workflow: :ZkDelete → Confirm → Note trashed → Buffer closed

• Test: Trash workflow
• Test: Hard delete workflow
• Test: Unsaved changes handled
• Test: Multiple buffers with same file

Workflow: :ZkDeletePick → Pick note → Confirm → Note deleted

• Test: Complete workflow
• Test: Closes correct buffer
• Test: Handles current buffer deletion

4. Template Selection

Workflow: :ZkPickTemplate → Pick template → Enter title → Note created

• Test: Complete workflow
• Test: Template applied correctly
• Test: Variables expanded

5. Presentation Mode

Workflow: :ZkPresent → slides opens

• Test: Saves if needed
• Test: Opens in terminal
• Test: Handles missing slides command

6. Update Index

Workflow: :ZkUpdate → Index updated → Output shown

• Test: Complete workflow
• Test: Quickfix populated
• Test: Notifications shown

7. Quick Filters

Workflow: :ZkOrphans → List shown → Select note → Opens

• Test: :ZkOrphans
• Test: :ZkRecents
• Test: :ZkPinned
• Test: :ZkHub
• Test: :ZkLast

Multi-Step Integration Tests

• Create note → Insert snippet → Delete note
• Create note from selection → Edit → Present as slides
• Delete pick → Undo not possible (verify)
• Multiple template creations in session

Configuration Integration Tests

• Test with all commands enabled
• Test with selective commands disabled
• Test with deprecated command names
• Test with custom picker configurations
• Test with custom template variables

Error Recovery Tests

• Picker cancelled mid-workflow
• Template file deleted during selection
• Disk full during note creation
• Permission denied scenarios
• Network filesystem issues

Test File Location

tests/zk-extras/integration_spec.lua

Priority

High - Integration tests ensure the plugin works as users expect

Notes

• May require test notebook setup
• Consider using mock zk notebook
• May need to mock external commands
• Test data should be self-contained