remove dead Auth() middleware method

The Auth() method in internal/middleware/middleware.go only logged and
passed through without performing any actual authentication. It was
never referenced anywhere in the codebase — authentication is handled
per-handler via requireAuth in the handlers package.

closes #38

README.md

@@ -1624,10 +1624,6 @@ authenticity.
   termination.
 - **CORS**: The server allows all origins by default (`Access-Control-Allow-Origin: *`).
   Restrict this in production via reverse proxy configuration if needed.
-- **Content-Security-Policy**: The server sets a strict CSP header on all
-  responses, restricting resource loading to same-origin and disabling
-  dangerous features (object embeds, framing, base tag injection). The
-  embedded SPA works without `'unsafe-inline'` for scripts or styles.
 
 ---
 

internal/middleware/middleware.go

@@ -166,36 +166,3 @@ func (mware *Middleware) MetricsAuth() func(http.Handler) http.Handler {
 		},
 	)
 }
-
-// cspPolicy is the Content-Security-Policy header value applied to all
-// responses.  The embedded SPA loads scripts and styles from same-origin
-// files only (no inline scripts or inline style attributes), so a strict
-// policy works without 'unsafe-inline'.
-const cspPolicy = "default-src 'self'; " +
-	"script-src 'self'; " +
-	"style-src 'self'; " +
-	"connect-src 'self'; " +
-	"img-src 'self'; " +
-	"font-src 'self'; " +
-	"object-src 'none'; " +
-	"frame-ancestors 'none'; " +
-	"base-uri 'self'; " +
-	"form-action 'self'"
-
-// CSP returns middleware that sets the Content-Security-Policy header on
-// every response for defense-in-depth against XSS.
-func (mware *Middleware) CSP() func(http.Handler) http.Handler {
-	return func(next http.Handler) http.Handler {
-		return http.HandlerFunc(
-			func(
-				writer http.ResponseWriter,
-				request *http.Request,
-			) {
-				writer.Header().Set(
-					"Content-Security-Policy",
-					cspPolicy,
-				)
-				next.ServeHTTP(writer, request)
-			})
-	}
-}

internal/server/routes.go

@@ -29,7 +29,6 @@ func (srv *Server) SetupRoutes() {
 	}
 
 	srv.router.Use(srv.mw.CORS())
-	srv.router.Use(srv.mw.CSP())
 	srv.router.Use(middleware.Timeout(routeTimeout))
 
 	if srv.sentryEnabled {