feat(idlewatcher): implement real-time SSE-based loading page with enhanced UX

This major overhaul of the idlewatcher system introduces a modern, real-time loading experience with Server-Sent Events (SSE) streaming and improved error handling.

- **Real-time Event Streaming**: New SSE endpoint (`/$godoxy/wake-events`) provides live updates during container wake process
- **Enhanced Loading Page**: Modern console-style interface with timestamped events and color-coded status messages
- **Improved Static Asset Management**: Dedicated paths for CSS, JS, and favicon to avoid conflicting with upstream assets
- **Event History Buffer**: Stores wake events for reconnecting clients and debugging

- Refactored HTTP request handling with cleaner static asset routing
- Added `WakeEvent` system with structured event types (starting, waking_dep, dep_ready, container_woke, waiting_ready, ready, error)
- Implemented thread-safe event broadcasting using xsync.Map for concurrent SSE connections
- Enhanced error handling with detailed logging and user-friendly error messages
- Simplified loading page template system with better asset path management
- Fixed race conditions in dependency waking and state management

- Removed `common.go` functions (canceled, waitStarted) - moved inline for better context
- Updated Waker interface to accept context parameter in Wake() method
- New static asset paths use `/$godoxy/` prefix to avoid conflicts

- Console-style output with Fira Code font for better readability
- Color-coded event types (yellow for starting, blue for dependencies, green for success, red for errors)
- Automatic page refresh when container becomes ready
- Improved visual design with better glassmorphism effects and responsive layout
- Real-time progress feedback during dependency wake and container startup

This change transforms the static loading page into a dynamic, informative experience that keeps users informed during the wake process while maintaining backward compatibility with existing routing behavior.

internal/route/reverse_proxy.go

@@ -153,6 +153,7 @@ func (r *ReveseProxyRoute) Start(parent task.Parent) gperr.Error {
 }
 
 func (r *ReveseProxyRoute) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+	// req.Header.Set("Accept-Encoding", "identity")
 	r.handler.ServeHTTP(w, req)
 }
 

internal/route/route.go

@@ -123,13 +123,24 @@ func (r Routes) Contains(alias string) bool {
 }
 
 func (r *Route) Validate() gperr.Error {
+	pcs := make([]uintptr, 1)
+	runtime.Callers(2, pcs)
+	f := runtime.FuncForPC(pcs[0])
+	fname := f.Name()
 	r.onceValidate.Do(func() {
+		filename, line := f.FileLine(pcs[0])
+		if strings.HasPrefix(r.Alias, "godoxy") {
+			log.Debug().Str("route", r.Alias).Str("caller", fname).Str("file", filename).Int("line", line).Msg("validating route")
+		}
 		r.valErr.Set(r.validate())
 	})
 	return r.valErr.Get()
 }
 
 func (r *Route) validate() gperr.Error {
+	if strings.HasPrefix(r.Alias, "godoxy") {
+		log.Debug().Any("route", r).Msg("validating route")
+	}
 	if r.Agent != "" {
 		if r.Container != nil {
 			return gperr.Errorf("specifying agent is not allowed for docker container routes")