fix: create mayor/daemon.json during gt start and gt doctor --fix (#225)

* fix: create mayor/daemon.json during gt start and gt doctor --fix (#5)

- Add DaemonPatrolConfig type with heartbeat and patrol settings
- Add Load/Save/Ensure functions for daemon patrol config
- Create daemon.json in gt start (non-fatal if fails)
- Make PatrolHooksWiredCheck fixable with Fix() method
- Add comprehensive tests for both config and doctor checks

This fixes the issue where gt doctor expects mayor/daemon.json to exist
but it was never created by gt start or any other command.

* refactor: use constants.DirMayor instead of hardcoded string

internal/config/types.go

@@ -66,6 +66,63 @@ type DaemonConfig struct {
 	PollInterval      string `json:"poll_interval,omitempty"`      // e.g., "10s"
 }
 
+// DaemonPatrolConfig represents the daemon patrol configuration (mayor/daemon.json).
+// This configures how patrols are triggered and managed.
+type DaemonPatrolConfig struct {
+	Type      string                  `json:"type"`                // "daemon-patrol-config"
+	Version   int                     `json:"version"`             // schema version
+	Heartbeat *HeartbeatConfig        `json:"heartbeat,omitempty"` // heartbeat settings
+	Patrols   map[string]PatrolConfig `json:"patrols,omitempty"`   // named patrol configurations
+}
+
+// HeartbeatConfig represents heartbeat settings for daemon.
+type HeartbeatConfig struct {
+	Enabled  bool   `json:"enabled"`            // whether heartbeat is enabled
+	Interval string `json:"interval,omitempty"` // e.g., "3m"
+}
+
+// PatrolConfig represents a single patrol configuration.
+type PatrolConfig struct {
+	Enabled  bool   `json:"enabled"`            // whether this patrol is enabled
+	Interval string `json:"interval,omitempty"` // e.g., "5m"
+	Agent    string `json:"agent,omitempty"`    // agent that runs this patrol
+}
+
+// CurrentDaemonPatrolConfigVersion is the current schema version for DaemonPatrolConfig.
+const CurrentDaemonPatrolConfigVersion = 1
+
+// DaemonPatrolConfigFileName is the filename for daemon patrol configuration.
+const DaemonPatrolConfigFileName = "daemon.json"
+
+// NewDaemonPatrolConfig creates a new DaemonPatrolConfig with sensible defaults.
+func NewDaemonPatrolConfig() *DaemonPatrolConfig {
+	return &DaemonPatrolConfig{
+		Type:    "daemon-patrol-config",
+		Version: CurrentDaemonPatrolConfigVersion,
+		Heartbeat: &HeartbeatConfig{
+			Enabled:  true,
+			Interval: "3m",
+		},
+		Patrols: map[string]PatrolConfig{
+			"deacon": {
+				Enabled:  true,
+				Interval: "5m",
+				Agent:    "deacon",
+			},
+			"witness": {
+				Enabled:  true,
+				Interval: "5m",
+				Agent:    "witness",
+			},
+			"refinery": {
+				Enabled:  true,
+				Interval: "5m",
+				Agent:    "refinery",
+			},
+		},
+	}
+}
+
 // DeaconConfig represents deacon process settings.
 type DeaconConfig struct {
 	PatrolInterval string `json:"patrol_interval,omitempty"` // e.g., "5m"
@@ -113,10 +170,10 @@ const CurrentRigSettingsVersion = 1
 // RigConfig represents per-rig identity (rig/config.json).
 // This contains only identity - behavioral config is in settings/config.json.
 type RigConfig struct {
-	Type      string       `json:"type"`       // "rig"
-	Version   int          `json:"version"`    // schema version
-	Name      string       `json:"name"`       // rig name
-	GitURL    string       `json:"git_url"`    // git repository URL
+	Type      string       `json:"type"`    // "rig"
+	Version   int          `json:"version"` // schema version
+	Name      string       `json:"name"`    // rig name
+	GitURL    string       `json:"git_url"` // git repository URL
 	LocalRepo string       `json:"local_repo,omitempty"`
 	CreatedAt time.Time    `json:"created_at"` // when the rig was created
 	Beads     *BeadsConfig `json:"beads,omitempty"`
@@ -264,8 +321,8 @@ type TownThemeConfig struct {
 // These are used when no explicit configuration is provided.
 func BuiltinRoleThemes() map[string]string {
 	return map[string]string{
-		"witness":  "rust",  // Red/rust - watchful, alert
-		"refinery": "plum",  // Purple - processing, refining
+		"witness":  "rust", // Red/rust - watchful, alert
+		"refinery": "plum", // Purple - processing, refining
 		// crew and polecat use rig theme by default (no override)
 	}
 }