Add test coverage for daemon lifecycle and config modules

- Add config_test.go: tests for daemon configuration (local/global, sync behavior)
- Add daemon_test.go: tests for daemon lifecycle (creation, shutdown, database path resolution)
- Add process_test.go: tests for daemon lock acquisition and release
- Closes bd-2b34.6, bd-2b34.7

Amp-Thread-ID: https://ampcode.com/threads/T-4419d1ab-4105-4e75-bea8-1837ee80e2c2
Co-authored-by: Amp <amp@ampcode.com>

internal/daemonrunner/config_test.go

@@ -0,0 +1,98 @@
+package daemonrunner
+
+import (
+	"testing"
+	"time"
+)
+
+func TestConfigDefaults(t *testing.T) {
+	cfg := Config{
+		Interval:   5 * time.Second,
+		AutoCommit: true,
+		AutoPush:   false,
+		Global:     false,
+	}
+
+	if cfg.Interval != 5*time.Second {
+		t.Errorf("Expected Interval 5s, got %v", cfg.Interval)
+	}
+	if !cfg.AutoCommit {
+		t.Error("Expected AutoCommit to be true")
+	}
+	if cfg.AutoPush {
+		t.Error("Expected AutoPush to be false")
+	}
+	if cfg.Global {
+		t.Error("Expected Global to be false")
+	}
+}
+
+func TestConfigLocalDaemon(t *testing.T) {
+	cfg := Config{
+		Global:        false,
+		WorkspacePath: "/tmp/test-workspace",
+		BeadsDir:      "/tmp/test-workspace/.beads",
+		DBPath:        "/tmp/test-workspace/.beads/beads.db",
+		SocketPath:    "/tmp/test-workspace/.beads/bd.sock",
+		LogFile:       "/tmp/test-workspace/.beads/daemon.log",
+		PIDFile:       "/tmp/test-workspace/.beads/daemon.pid",
+	}
+
+	if cfg.Global {
+		t.Error("Expected local daemon (Global=false)")
+	}
+	if cfg.WorkspacePath == "" {
+		t.Error("Expected WorkspacePath to be set for local daemon")
+	}
+	if cfg.DBPath == "" {
+		t.Error("Expected DBPath to be set for local daemon")
+	}
+}
+
+func TestConfigGlobalDaemon(t *testing.T) {
+	cfg := Config{
+		Global:     true,
+		BeadsDir:   "/home/user/.beads",
+		SocketPath: "/home/user/.beads/global.sock",
+		LogFile:    "/home/user/.beads/global-daemon.log",
+		PIDFile:    "/home/user/.beads/global-daemon.pid",
+	}
+
+	if !cfg.Global {
+		t.Error("Expected global daemon (Global=true)")
+	}
+	if cfg.WorkspacePath != "" {
+		t.Error("Expected WorkspacePath to be empty for global daemon")
+	}
+	if cfg.DBPath != "" {
+		t.Error("Expected DBPath to be empty for global daemon")
+	}
+}
+
+func TestConfigSyncBehavior(t *testing.T) {
+	tests := []struct {
+		name       string
+		autoCommit bool
+		autoPush   bool
+	}{
+		{"no sync", false, false},
+		{"commit only", true, false},
+		{"commit and push", true, true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cfg := Config{
+				AutoCommit: tt.autoCommit,
+				AutoPush:   tt.autoPush,
+			}
+
+			if cfg.AutoCommit != tt.autoCommit {
+				t.Errorf("Expected AutoCommit=%v, got %v", tt.autoCommit, cfg.AutoCommit)
+			}
+			if cfg.AutoPush != tt.autoPush {
+				t.Errorf("Expected AutoPush=%v, got %v", tt.autoPush, cfg.AutoPush)
+			}
+		})
+	}
+}