fix(auth): doctor reads token from current profile

[ahnbu]

Summary

Fixes #5

notion auth doctor always failed with ✗ Config: no token found even after a successful notion auth login, because it was checking the legacy top-level cfg.Token field — which is cleared by MigrateToProfiles() when the new profile format is used.

Root Cause

// cmd/auth.go — before fix
cfg, err := config.Load()
if err != nil || cfg.Token == "" {   // cfg.Token is "" after profile-based login

auth login stores the token in cfg.Profiles["default"].Token, not cfg.Token. After MigrateToProfiles() runs, the top-level Token field is cleared.

Fix

Resolve the token via GetCurrentProfile() (the existing accessor) when the legacy field is empty, then use that token for both the nil-check and the API client:

cfg, err := config.Load()
profile := cfg.GetCurrentProfile()
token := cfg.Token
if token == "" && profile != nil {
    token = profile.Token
}
if err != nil || token == "" {
    // ...
}
c := client.New(token)

Testing

Before: notion auth login → notion auth doctor → ✗ Config: no token found
After: notion auth login → notion auth doctor → All checks passed ✓

[4ier]

Clean fix, merged! Thanks for tracking down the profile format mismatch. 🎯