chore: import clean Agent Desk snapshot (2/7)

internal/pkg/config/runtime.go

@@ -0,0 +1,32 @@
+package config
+
+import "strings"
+
+var current *Config
+
+func SetCurrent(cfg *Config) {
+	current = cfg
+}
+
+func Current() Config {
+	if current == nil {
+		panic("config not initialized")
+	}
+	return *current
+}
+
+func GetCurrent() *Config {
+	return current
+}
+
+// ResolveSlack resolves the Slack app credentials for one channel without
+// requiring the caller to nil-check the loaded configuration.
+func ResolveSlack(channelBotToken, channelSigningSecret string) SlackConfig {
+	if current == nil {
+		return SlackConfig{
+			BotToken:      strings.TrimSpace(channelBotToken),
+			SigningSecret: strings.TrimSpace(channelSigningSecret),
+		}
+	}
+	return current.SlackApp(channelBotToken, channelSigningSecret)
+}