v0.1.17: UI fixes, Linux improvements, documentation overhaul

UI/UX:
- Fix heartbeat auto-refresh and rate-limiting page
- Add navigation breadcrumbs to settings pages
- New screenshots added

Linux Agent v0.1.17:
- Fix disk detection for multiple mount points
- Improve installer idempotency
- Prevent duplicate registrations

Documentation:
- README rewrite: 538→229 lines, homelab-focused
- Split docs: API.md, CONFIGURATION.md, DEVELOPMENT.md
- Add NOTICE for Apache 2.0 attribution

aggregator-agent/internal/service/service_stub.go

@@ -0,0 +1,52 @@
+//go:build !windows
+
+package service
+
+import (
+	"fmt"
+	"runtime"
+	"github.com/Fimeg/RedFlag/aggregator-agent/internal/config"
+)
+
+// Stub implementations for non-Windows platforms
+
+// RunService executes the agent as a Windows service (stub for non-Windows)
+func RunService(cfg *config.Config) error {
+	return fmt.Errorf("Windows service mode is only available on Windows, current OS: %s", runtime.GOOS)
+}
+
+// IsService returns true if running as Windows service (stub for non-Windows)
+func IsService() bool {
+	return false
+}
+
+// InstallService installs the agent as a Windows service (stub for non-Windows)
+func InstallService() error {
+	return fmt.Errorf("Windows service installation is only available on Windows, current OS: %s", runtime.GOOS)
+}
+
+// RemoveService removes the Windows service (stub for non-Windows)
+func RemoveService() error {
+	return fmt.Errorf("Windows service removal is only available on Windows, current OS: %s", runtime.GOOS)
+}
+
+// StartService starts the Windows service (stub for non-Windows)
+func StartService() error {
+	return fmt.Errorf("Windows service management is only available on Windows, current OS: %s", runtime.GOOS)
+}
+
+// StopService stops the Windows service (stub for non-Windows)
+func StopService() error {
+	return fmt.Errorf("Windows service management is only available on Windows, current OS: %s", runtime.GOOS)
+}
+
+// ServiceStatus returns the current status of the Windows service (stub for non-Windows)
+func ServiceStatus() error {
+	return fmt.Errorf("Windows service management is only available on Windows, current OS: %s", runtime.GOOS)
+}
+
+// RunConsole runs the agent in console mode with signal handling
+func RunConsole(cfg *config.Config) error {
+	// For non-Windows, just run normally
+	return fmt.Errorf("Console mode is handled by main application logic on %s", runtime.GOOS)
+}