fix zombie leak, add quiet-hours toggle, improve query reply, configurable router threshold, JS dashboard

internal/config/config.go

@@ -120,6 +120,13 @@ type VoiceConfig struct {
 	Tts      *TtsConfig      `json:"tts,omitempty"`
 	Embedder *EmbedderConfig `json:"embedder,omitempty"`
 
+	// RouterThreshold — the minimum confidence score for the intent classifier
+	// (stage 3 gate). Below this → clarify, don't guess. 0.0 means permissive
+	// (never clarify); 0.35 is a reasonable floor for the ONNX embedder.
+	// The HashEmbedder floor scores lexically and may need a lower value.
+	// Default 0.35 if unset.
+	RouterThreshold float64 `json:"router_threshold,omitempty"`
+
 	// Tools — the enabled act allowlist. Each is a spoken verb → argv the
 	// executor runs (args from the utterance appended). Editing this set is the
 	// human-only "enable" act (per spec); maven can't add to it from a request.
@@ -215,6 +222,7 @@ const (
 	DefaultTickInterval     = 60 * time.Second
 	DefaultRepeatInterval   = 5 * time.Minute
 	DefaultAutotuneInterval = 10 * time.Minute
+	DefaultRouterThreshold  = 0.35
 )
 
 // Load reads the JSON config at path and applies defaults. A missing file is