Align with cameleer3-common rename: logForwardingLevel → applicationLogLevel
(root logger) and new agentLogLevel (com.cameleer3 logger). Both fields
are on ApplicationConfig, pushed via config-update. UI shows "App Log Level"
and "Agent Log Level" on AppConfig slide-in, AgentHealth config bar, and
AppConfigDetailPage.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>