fix: apply default_launch_extras when cwd is the default workspace

[bigcat88]

When a user cd's into their configured default ComfyUI workspace and runs comfy launch, the default_launch_extras setting is silently ignored. This happens because get_workspace_path() detects the cwd as a ComfyUI repo (step 4) and returns CURRENT_DIR before ever checking whether it matches the configured default (step 5). The launch command only applies default_launch_extras when the workspace type is DEFAULT.

The fix adds a check in step 4: when cwd is detected as a ComfyUI repo, compare it against the configured default workspace before deciding the type. If they match, return DEFAULT so the launch extras are applied correctly. The comparison uses os.path.samefile to handle symlinks and case-insensitive filesystems, with a realpath fallback for nonexistent paths.

This is a simpler alternative to #338 — only workspace_manager.py is changed, no modifications to launch.py needed.

Closes #311

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@            Coverage Diff             @@
##             main     #374      +/-   ##
==========================================
+ Coverage   54.51%   54.89%   +0.38%     
==========================================
  Files          32       32              
  Lines        3603     3618      +15     
==========================================
+ Hits         1964     1986      +22     
+ Misses       1639     1632       -7     

Files with missing lines	Coverage Δ
comfy_cli/workspace_manager.py	69.41% <100.00%> (+5.83%)	⬆️

... and 1 file with indirect coverage changes

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