refactor: cleanup comments

go/internal/handler/metadata.go

@@ -14,10 +14,9 @@ import (
 	"time"
 )
 
-// LinkMetadata mirrors the TS shape in
-// `js/desktop/src/lib/link-metadata.ts`. The Electron client does this fetch
-// in its main process; the web client can't (browser CORS), so it calls this
-// endpoint instead.
+// LinkMetadata mirrors the TS shape in `js/desktop/src/lib/link-metadata.ts`.
+// All clients (web and Electron) call this endpoint — the Electron main-process
+// fetcher was retired so both clients share one parser and the server-side cache.
 type LinkMetadata struct {
 	URL         string  `json:"url"`
 	Title       *string `json:"title"`
@@ -33,8 +32,8 @@ const (
 	metadataUserAgent    = "Mozilla/5.0 (compatible; llink/1.0)"
 )
 
-// In-process cache, unbounded but only successful results are stored. Mirrors
-// the Electron-main implementation; URL space is bounded in practice.
+// In-process cache, unbounded but only successful results are stored.
+// URL space is bounded in practice.
 var metadataCache sync.Map // map[string]LinkMetadata
 
 func (h *Handler) GetLinkMetadata(w http.ResponseWriter, r *http.Request) {
@@ -139,9 +138,6 @@ func fetchLinkMetadata(ctx context.Context, target *url.URL) (*LinkMetadata, err
 	}, nil
 }
 
-// Regex patterns mirror the JS impl in `js/desktop/src/main.ts` so both clients
-// derive the same metadata until the JS path is retired.
-
 var titleRe = regexp.MustCompile(`(?i)<title[^>]*>([^<]*)</title>`)
 
 func parseTitle(html string) *string {