Add favicon as profile picture for feed accounts

Fetches the site's favicon and uses it as the avatar when creating
or updating feed account profiles. Tries common favicon locations
(/favicon.ico, /favicon.png, /apple-touch-icon.png) then falls back
to Google's favicon service.

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

crawler.go

@@ -227,7 +227,15 @@ func (c *Crawler) StartPublishLoop() {
 						if len(description) > 256 {
 							description = description[:253] + "..."
 						}
-						if err := publisher.UpdateProfile(session, displayName, description, nil); err != nil {
+						// Fetch and upload favicon as avatar
+						var avatar *BlobRef
+						if feedInfo.SiteURL != "" {
+							faviconURL := publisher.FetchFavicon(feedInfo.SiteURL)
+							if faviconURL != "" {
+								avatar = publisher.fetchAndUploadImage(session, faviconURL)
+							}
+						}
+						if err := publisher.UpdateProfile(session, displayName, description, avatar); err != nil {
 							fmt.Printf("Publish: failed to set profile for %s: %v\n", account, err)
 						} else {
 							fmt.Printf("Publish: set profile for %s\n", account)
@@ -297,7 +305,7 @@ func (c *Crawler) getFeedInfo(feedURL string) *FeedInfo {
 // RefreshAllProfiles updates profiles for all existing accounts with feed URLs
 func (c *Crawler) RefreshAllProfiles(publisher *Publisher, feedPassword string) {
 	rows, err := c.db.Query(`
-		SELECT url, title, description, publish_account
+		SELECT url, title, description, site_url, publish_account
 		FROM feeds
 		WHERE publish_account IS NOT NULL AND publish_account <> ''
 	`)
@@ -309,8 +317,8 @@ func (c *Crawler) RefreshAllProfiles(publisher *Publisher, feedPassword string)
 
 	for rows.Next() {
 		var feedURL, account string
-		var title, description *string
-		if err := rows.Scan(&feedURL, &title, &description, &account); err != nil {
+		var title, description, siteURL *string
+		if err := rows.Scan(&feedURL, &title, &description, &siteURL, &account); err != nil {
 			continue
 		}
 
@@ -342,7 +350,16 @@ func (c *Crawler) RefreshAllProfiles(publisher *Publisher, feedPassword string)
 			desc = desc[:253] + "..."
 		}
 
-		if err := publisher.UpdateProfile(session, displayName, desc, nil); err != nil {
+		// Fetch and upload favicon as avatar
+		var avatar *BlobRef
+		if siteURL != nil && *siteURL != "" {
+			faviconURL := publisher.FetchFavicon(*siteURL)
+			if faviconURL != "" {
+				avatar = publisher.fetchAndUploadImage(session, faviconURL)
+			}
+		}
+
+		if err := publisher.UpdateProfile(session, displayName, desc, avatar); err != nil {
 			fmt.Printf("RefreshProfiles: update failed for %s: %v\n", account, err)
 		} else {
 			fmt.Printf("RefreshProfiles: updated %s\n", account)

publisher.go

@@ -473,6 +473,47 @@ func (p *Publisher) uploadImages(session *PDSSession, imageURLs []string, altTex
 }
 
 // fetchAndUploadImage downloads an image and uploads it to the PDS
+// FetchFavicon tries to get a favicon URL for a site
+// Returns the favicon URL or empty string if not found
+func (p *Publisher) FetchFavicon(siteURL string) string {
+	if siteURL == "" {
+		return ""
+	}
+
+	// Parse the site URL to get the host
+	if !strings.Contains(siteURL, "://") {
+		siteURL = "https://" + siteURL
+	}
+	u, err := url.Parse(siteURL)
+	if err != nil {
+		return ""
+	}
+
+	// Try common favicon locations
+	faviconURLs := []string{
+		fmt.Sprintf("https://%s/favicon.ico", u.Host),
+		fmt.Sprintf("https://%s/favicon.png", u.Host),
+		fmt.Sprintf("https://%s/apple-touch-icon.png", u.Host),
+	}
+
+	for _, faviconURL := range faviconURLs {
+		resp, err := p.httpClient.Head(faviconURL)
+		if err != nil {
+			continue
+		}
+		resp.Body.Close()
+		if resp.StatusCode == http.StatusOK {
+			contentType := resp.Header.Get("Content-Type")
+			if strings.HasPrefix(contentType, "image/") || strings.HasSuffix(faviconURL, ".ico") {
+				return faviconURL
+			}
+		}
+	}
+
+	// Fallback to Google's favicon service (reliable, returns PNG)
+	return fmt.Sprintf("https://www.google.com/s2/favicons?domain=%s&sz=128", u.Host)
+}
+
 func (p *Publisher) fetchAndUploadImage(session *PDSSession, imageURL string) *BlobRef {
 	// Fetch the image
 	resp, err := p.httpClient.Get(imageURL)