Recreate missing ComfyUI directories during validation

[benceruleanlu]

Summary

• during validation, recreate the expected ComfyUI directory structure under the configured basePath using ComfyConfigManager
• mark basePath as error if the structure cannot be recreated, preventing launch with invalid paths
• add unit tests covering the directory self-heal behavior

Context

User deleted the entire base path folder (~/Documents), leaving no user/input/output/custom_nodes/models dirs. The app still validated as installed and tried to launch with --user-directory /Users/ben/Documents/user, which failed with:

main.py: error: argument --user-directory: The path '/Users/ben/Documents/user' does not exist.

This change makes validation rebuild the directory structure and fail fast if it cannot, avoiding the runtime crash.

Testing

• Unit tests added for directory self-heal in ComfyInstallation (lint/tsc via lint-staged)

[christian-byrne]

How about tests?

[benceruleanlu]

@codex review

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Reset mock implementation between tests

The second test replaces createComfyDirectories with a throwing implementation (lines 77‑80), but the beforeEach only calls vi.clearAllMocks (lines 62‑64), which clears call history without restoring implementations. As a result, the third test still uses the throwing mock and will fail before reaching isComfyDirectory, so the new suite is red as soon as the failing mock is set. Reset the mock implementation (e.g., mockReset/resetAllMocks) or reassign it per test so the later cases run with the intended behavior.

Useful? React with 👍 / 👎.

[benceruleanlu]

This one isn't blocking for next release, so I'll draft until it's ready