Claude common config updates do not refresh active live config during takeover

[mydelren]

Summary

When Claude proxy takeover is already active, updating Claude common config refreshes the DB snippet but does not refresh the active live config (~/.claude/settings.json).

In this state, cc-switch reports success / refreshed live config, but snippet-owned fields such as statusLine or simple env keys never appear in the active Claude live settings.

Scope

This report is specifically about the Claude takeover-active path.

I am not claiming that common config is generally broken:

• when proxy takeover is inactive, config common set updates Claude live config as expected
• when common config is set before proxy enable, the resulting taken-over live config also keeps the common fields
• the stale behavior appears when takeover is already active and then common config is updated

Reproduction

Minimal repro uses a simple env key instead of statusLine, so no helper script is required.

1. Start with a Claude provider whose commonConfigEnabled=true
2. Enable Claude proxy takeover
3. Run a common-config update, for example a snippet that adds:
   • env.MY_TEST_KEY = "1"
4. Inspect both:
   • the stored common config in cc-switch
   • the active Claude live config at ~/.claude/settings.json

Expected behavior

Both should reflect the new common-config fields.

Actual behavior

• cc-switch stores the updated Claude common config
• but the active Claude live config remains stale
• takeover-only fields (proxy URL / managed placeholder) stay in place, but newly added common fields do not appear

In my real-world case this showed up as statusLine existing in cc-switch common config while Claude Code never displayed it, because ~/.claude/settings.json never received the field.

Notes from local investigation

The likely problematic path seems to be the post-commit flow used when takeover is already active:

• common-config update builds a post-commit action with takeover_active=true
• this goes through the ProxyLiveBackup effect
• backup/snapshot handling runs, but the active Claude live config is not refreshed through the same effective-settings path used elsewhere

I have a local patch and regression test prepared and can open a PR referencing this issue.