Disable CDN caching for HTML, add Quicklink prefetching

- Change Cache-Control from s-maxage=31536000 to max-age=0,must-revalidate
  for all HTML pages and sitemap (fixes stale content after settings change)
- Remove Cloudflare PurgeURLs call since we're not caching HTML at CDN
- Add Quicklink for client-side prefetching on public blog pages
- Make main branch deploy automatic (remove manual trigger)

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

.woodpecker/build.yaml

@@ -36,7 +36,6 @@ steps:
     image: alpine
     when:
       branch: main
-      event: manual
     commands:
       - apk add --no-cache openssh-client
       - mkdir -p ~/.ssh

internal/build/templates/base.html

@@ -71,6 +71,8 @@
   </div>
 
   <script src="/static/js/main.js"></script>
+  <script src="https://unpkg.com/quicklink@2.3.0/dist/quicklink.umd.js"></script>
+  <script>quicklink.listen({ignores: [/\/studio/, /\/api\//]});</script>
   {{block "scripts" .}}{{end}}
 </body>
 </html>

internal/server/blog.go

@@ -98,7 +98,7 @@ func (s *Server) blogHome(w http.ResponseWriter, r *http.Request) {
 	s.recordPageView(q, r, "/", "")
 
 	if html, etag, err := q.GetPage(r.Context(), "/"); err == nil && html != nil {
-		s.servePreRendered(w, r, html, etag, "public, s-maxage=31536000, max-age=0")
+		s.servePreRendered(w, r, html, etag, "public, max-age=0, must-revalidate")
 		return
 	}
 
@@ -156,7 +156,7 @@ func (s *Server) blogHome(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	s.servePreRendered(w, r, html, computeETag(html), "public, s-maxage=31536000, max-age=0")
+	s.servePreRendered(w, r, html, computeETag(html), "public, max-age=0, must-revalidate")
 }
 
 func (s *Server) blogList(w http.ResponseWriter, r *http.Request) {
@@ -172,7 +172,7 @@ func (s *Server) blogList(w http.ResponseWriter, r *http.Request) {
 	s.recordPageView(q, r, "/posts", "")
 
 	if html, etag, err := q.GetPage(r.Context(), "/posts"); err == nil && html != nil {
-		s.servePreRendered(w, r, html, etag, "public, s-maxage=31536000, max-age=0")
+		s.servePreRendered(w, r, html, etag, "public, max-age=0, must-revalidate")
 		return
 	}
 
@@ -223,7 +223,7 @@ func (s *Server) blogList(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	s.servePreRendered(w, r, html, computeETag(html), "public, s-maxage=31536000, max-age=0")
+	s.servePreRendered(w, r, html, computeETag(html), "public, max-age=0, must-revalidate")
 }
 
 func (s *Server) blogPost(w http.ResponseWriter, r *http.Request) {
@@ -249,7 +249,7 @@ func (s *Server) blogPost(w http.ResponseWriter, r *http.Request) {
 		s.recordPageView(q, r, path, slug)
 
 		if html, etag, err := q.GetPage(r.Context(), path); err == nil && html != nil {
-			s.servePreRendered(w, r, html, etag, "public, s-maxage=31536000, max-age=0")
+			s.servePreRendered(w, r, html, etag, "public, max-age=0, must-revalidate")
 			return
 		}
 	}
@@ -457,7 +457,7 @@ func (s *Server) blogPost(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	s.servePreRendered(w, r, html, computeETag(html), "public, s-maxage=31536000, max-age=0")
+	s.servePreRendered(w, r, html, computeETag(html), "public, max-age=0, must-revalidate")
 }
 
 func (s *Server) canPreview(r *http.Request, tenantID string) bool {
@@ -543,7 +543,7 @@ func (s *Server) sitemap(w http.ResponseWriter, r *http.Request) {
 	baseURL := getBaseURL(r.Host)
 
 	w.Header().Set("Content-Type", "application/xml; charset=utf-8")
-	w.Header().Set("Cache-Control", "public, s-maxage=31536000, max-age=0")
+	w.Header().Set("Cache-Control", "public, max-age=0, must-revalidate")
 
 	w.Write([]byte(`<?xml version="1.0" encoding="UTF-8"?>
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">

internal/server/build.go

@@ -162,15 +162,5 @@ func (s *Server) rebuildSite(ctx context.Context, tenantID string, db *sql.DB, h
 		}
 	}
 
-	if s.cloudflare.IsConfigured() {
-		urls := make([]string, len(pages))
-		for i, p := range pages {
-			urls[i] = baseURL + p.path
-		}
-		if err := s.cloudflare.PurgeURLs(ctx, urls); err != nil {
-			slog.Error("rebuildSite: purge cache", "error", err)
-		}
-	}
-
 	slog.Info("rebuildSite: complete", "tenantID", tenantID, "pages", len(pages))
 }