Add tests for cmd/bd CLI to improve coverage (bd-llfl)

Added tests for:
- daemon_config.go: ensureBeadsDir, getPIDFilePath, getLogFilePath,
  getSocketPathForPID
- daemon_autostart.go: determineSocketPath, isDaemonRunningQuiet
- activity.go: printEvent
- cleanup.go: showCleanupDeprecationHint
- upgrade.go: pluralize
- wisp.go: formatTimeAgo
- list.go: pinIndicator, sortIssues
- hooks.go: FormatHookWarnings, isRebaseInProgress, hasBeadsJSONL
- template.go: extractIDSuffix
- thanks.go: getContributorsSorted

Coverage improved from 22.5% to 23.1% for cmd/bd package.
Most remaining untested code requires daemon/RPC operations.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cmd/bd/autostart_test.go

@@ -245,3 +245,58 @@ func TestGetSocketPath(t *testing.T) {
 		}
 	})
 }
+
+func TestDetermineSocketPath(t *testing.T) {
+	t.Run("returns same path passed in", func(t *testing.T) {
+		testPath := "/tmp/.beads/bd.sock"
+		result := determineSocketPath(testPath)
+		if result != testPath {
+			t.Errorf("determineSocketPath(%q) = %q, want %q", testPath, result, testPath)
+		}
+	})
+
+	t.Run("preserves empty path", func(t *testing.T) {
+		result := determineSocketPath("")
+		if result != "" {
+			t.Errorf("determineSocketPath(\"\") = %q, want empty string", result)
+		}
+	})
+}
+
+func TestIsDaemonRunningQuiet(t *testing.T) {
+	tmpDir := t.TempDir()
+	pidFile := filepath.Join(tmpDir, "daemon.pid")
+
+	t.Run("returns false when PID file does not exist", func(t *testing.T) {
+		os.Remove(pidFile)
+		if isDaemonRunningQuiet(pidFile) {
+			t.Error("expected false when PID file does not exist")
+		}
+	})
+
+	t.Run("returns false when PID file is invalid", func(t *testing.T) {
+		if err := os.WriteFile(pidFile, []byte("not-a-number"), 0644); err != nil {
+			t.Fatalf("failed to create PID file: %v", err)
+		}
+		defer os.Remove(pidFile)
+
+		if isDaemonRunningQuiet(pidFile) {
+			t.Error("expected false when PID file contains invalid content")
+		}
+	})
+
+	t.Run("returns false for non-existent PID", func(t *testing.T) {
+		// Use a PID that's very unlikely to exist
+		if err := os.WriteFile(pidFile, []byte("999999999"), 0644); err != nil {
+			t.Fatalf("failed to create PID file: %v", err)
+		}
+		defer os.Remove(pidFile)
+
+		if isDaemonRunningQuiet(pidFile) {
+			t.Error("expected false for non-existent PID")
+		}
+	})
+}
+
+// Note: TestGetPIDFileForSocket, TestReadPIDFromFile, and TestIsPIDAlive
+// are already defined in daemon_basics_test.go