v1.0.2

Hotfix release for the Unexpected API response banner seen in some deployed builds.

• allow extra_usage fields from /api/oauth/usage to be null
• keep the usage screen rendering when extra-usage details are unavailable
• release app version 1.0.2

SHA256 (ClaudePet-1.0.2.dmg):
1cdb5a315ca32adff8362c20b0a311a0c5fad192f85fc5caa41b87d41c71a400