feat(daemon): add PromptPal configuration variables

Add ppEndpoint and ppToken variables to daemon for future AI integration support.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: AnnatarHe

cmd/daemon/main.go

@@ -20,6 +20,9 @@ var (
 	commit     = "none"
 	date       = "unknown"
 	uptraceDsn = ""
+
+	ppEndpoint = ""
+	ppToken    = ""
 )
 
 func getConfigPath() string {