fix: serve sw.js from /api/push/sw.js to bypass Apache static file routing

Apache fronts the Go service and only proxies /api/ paths; /sw.js hits
Apache's filesystem and 404s. Serve the service worker from
/api/push/sw.js with Service-Worker-Allowed: / so the browser allows
it to control the full origin scope. Update SW registration URL.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2 files changed, 16 insertions, 0 deletions

diff --git a/internal/api/push.go b/internal/api/push.go
index 6fd805a..dde5441 100644
--- a/internal/api/push.go
+++ b/internal/api/push.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/thepeterstone/claudomator/internal/storage"
+	webui "github.com/thepeterstone/claudomator/web"
 )
 
 // pushSubscriptionStore is the minimal interface needed by push handlers.
@@ -37,6 +38,20 @@ func (s *Server) handleGetVAPIDKey(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, map[string]string{"public_key": s.vapidPublicKey})
 }
 
+// handleServiceWorker serves sw.js with a Service-Worker-Allowed: / header so
+// the SW can control the full origin even though it is registered from /api/push/sw.js.
+func (s *Server) handleServiceWorker(w http.ResponseWriter, r *http.Request) {
+	data, err := webui.Files.ReadFile("sw.js")
+	if err != nil {
+		http.Error(w, "service worker not found", http.StatusNotFound)
+		return
+	}
+	w.Header().Set("Content-Type", "application/javascript")
+	w.Header().Set("Service-Worker-Allowed", "/")
+	w.WriteHeader(http.StatusOK)
+	w.Write(data)
+}
+
 // handlePushSubscribe saves a new push subscription.
 func (s *Server) handlePushSubscribe(w http.ResponseWriter, r *http.Request) {
 	var input struct {
diff --git a/internal/api/server.go b/internal/api/server.go
index 488c500..f640aba 100644
--- a/internal/api/server.go
+++ b/internal/api/server.go
@@ -134,6 +134,7 @@ func (s *Server) routes() {
 	s.mux.HandleFunc("GET /api/health", s.handleHealth)
 	s.mux.HandleFunc("POST /api/webhooks/github", s.handleGitHubWebhook)
 	s.mux.HandleFunc("GET /api/push/vapid-key", s.handleGetVAPIDKey)
+	s.mux.HandleFunc("GET /api/push/sw.js", s.handleServiceWorker)
 	s.mux.HandleFunc("POST /api/push/subscribe", s.handlePushSubscribe)
 	s.mux.HandleFunc("DELETE /api/push/subscribe", s.handlePushUnsubscribe)
 	s.mux.HandleFunc("GET /api/drops", s.handleListDrops)