fix(prefs): persist favicon choice and apply to HTML results

- Save favicon cookie on POST /preferences; reflect selection in template
- Add getFaviconService helper; pass favicon service into FromResponse
- Compute ResultView.FaviconIconURL (none/google/duckduckgo/self proxy)
- Update result_item and video_item templates; add httpapi/views tests

Made-with: Cursor

internal/httpapi/handlers.go

@@ -65,6 +65,17 @@ func (h *Handler) getTheme(r *http.Request) string {
 	return "light"
 }
 
+// getFaviconService returns the favicon provider from cookie (default "none").
+func (h *Handler) getFaviconService(r *http.Request) string {
+	if cookie, err := r.Cookie("favicon"); err == nil {
+		switch cookie.Value {
+		case "none", "google", "duckduckgo", "self":
+			return cookie.Value
+		}
+	}
+	return "none"
+}
+
 // Index renders the homepage with the search box.
 func (h *Handler) Index(w http.ResponseWriter, r *http.Request) {
 	if r.URL.Path != "/" {
@@ -103,7 +114,7 @@ func (h *Handler) Search(w http.ResponseWriter, r *http.Request) {
 	req, err := search.ParseSearchRequest(r)
 	if err != nil {
 		if format == "html" || format == "" {
-			pd := views.PageData{SourceURL: h.sourceURL, Query: q, Theme: h.getTheme(r)}
+			pd := views.PageData{SourceURL: h.sourceURL, Query: q, Theme: h.getTheme(r), FaviconService: h.getFaviconService(r)}
 			if views.IsHTMXRequest(r) {
 				views.RenderSearchFragment(w, pd)
 			} else {
@@ -118,7 +129,7 @@ func (h *Handler) Search(w http.ResponseWriter, r *http.Request) {
 	resp, err := h.searchSvc.Search(r.Context(), req)
 	if err != nil {
 		if req.Format == contracts.FormatHTML {
-			pd := views.PageData{SourceURL: h.sourceURL, Query: req.Query, Theme: h.getTheme(r)}
+			pd := views.PageData{SourceURL: h.sourceURL, Query: req.Query, Theme: h.getTheme(r), FaviconService: h.getFaviconService(r)}
 			if views.IsHTMXRequest(r) {
 				views.RenderSearchFragment(w, pd)
 			} else {
@@ -132,7 +143,7 @@ func (h *Handler) Search(w http.ResponseWriter, r *http.Request) {
 
 	if req.Format == contracts.FormatHTML {
 		pd := views.FromResponse(resp, req.Query, req.Pageno,
-		r.FormValue("category"), r.FormValue("time"), r.FormValue("type"))
+			r.FormValue("category"), r.FormValue("time"), r.FormValue("type"), h.getFaviconService(r))
 		pd.Theme = h.getTheme(r)
 		if err := views.RenderSearchAuto(w, r, pd); err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
@@ -182,6 +193,19 @@ func (h *Handler) Preferences(w http.ResponseWriter, r *http.Request) {
 				SameSite: http.SameSiteLaxMode,
 			})
 		}
+		// Persist favicon provider preference.
+		favicon := strings.TrimSpace(r.FormValue("favicon"))
+		switch favicon {
+		case "none", "google", "duckduckgo", "self":
+			http.SetCookie(w, &http.Cookie{
+				Name:     "favicon",
+				Value:    favicon,
+				Path:     "/",
+				MaxAge:   86400 * 365,
+				HttpOnly: false,
+				SameSite: http.SameSiteLaxMode,
+			})
+		}
 		http.Redirect(w, r, "/preferences", http.StatusFound)
 		return
 	}
@@ -192,7 +216,7 @@ func (h *Handler) Preferences(w http.ResponseWriter, r *http.Request) {
 			theme = cookie.Value
 		}
 	}
-	if err := views.RenderPreferences(w, h.sourceURL, theme); err != nil {
+	if err := views.RenderPreferences(w, h.sourceURL, theme, h.getFaviconService(r)); err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 	}
 }

internal/httpapi/httpapi_test.go

@@ -74,6 +74,7 @@ func newTestServer(t *testing.T) (*httptest.Server, *httpapi.Handler) {
 	mux.HandleFunc("/", h.Index)
 	mux.HandleFunc("/search", h.Search)
 	mux.HandleFunc("/autocompleter", h.Autocompleter)
+	mux.HandleFunc("/preferences", h.Preferences)
 
 	server := httptest.NewServer(mux)
 	t.Cleanup(server.Close)
@@ -228,3 +229,50 @@ func TestSearch_SourceURLInFooter(t *testing.T) {
 		t.Error("expected AGPLv3 link in footer")
 	}
 }
+
+func TestPreferences_PostSetsFaviconCookie(t *testing.T) {
+	server, _ := newTestServer(t)
+	client := &http.Client{CheckRedirect: func(*http.Request, []*http.Request) error {
+		return http.ErrUseLastResponse
+	}}
+	req, _ := http.NewRequest(http.MethodPost, server.URL+"/preferences", strings.NewReader("favicon=google&theme=dark"))
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	resp, err := client.Do(req)
+	if err != nil {
+		t.Fatalf("request failed: %v", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusFound {
+		t.Fatalf("expected redirect 302, got %d", resp.StatusCode)
+	}
+	found := false
+	for _, c := range resp.Cookies() {
+		if c.Name == "favicon" {
+			found = true
+			if c.Value != "google" {
+				t.Fatalf("expected favicon cookie google, got %q", c.Value)
+			}
+		}
+	}
+	if !found {
+		t.Fatal("expected favicon cookie to be set")
+	}
+}
+
+func TestPreferences_GetReflectsFaviconCookie(t *testing.T) {
+	server, _ := newTestServer(t)
+	req, _ := http.NewRequest(http.MethodGet, server.URL+"/preferences", nil)
+	req.AddCookie(&http.Cookie{Name: "favicon", Value: "duckduckgo"})
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		t.Fatalf("request failed: %v", err)
+	}
+	defer resp.Body.Close()
+
+	body, _ := io.ReadAll(resp.Body)
+	html := string(body)
+	if !strings.Contains(html, `option value="duckduckgo" selected`) {
+		t.Fatalf("expected duckduckgo option selected, body: %s", html)
+	}
+}

internal/views/templates/preferences.html

@@ -74,10 +74,10 @@
           <p class="pref-desc">Fetch favicons for result URLs. "None" is most private.</p>
         </div>
         <select name="favicon" id="pref-favicon">
-          <option value="none" selected>None</option>
-          <option value="google">Google</option>
-          <option value="duckduckgo">DuckDuckGo</option>
-          <option value="self">Self (Kafka)</option>
+          <option value="none" {{if eq .FaviconService "none"}}selected{{end}}>None</option>
+          <option value="google" {{if eq .FaviconService "google"}}selected{{end}}>Google</option>
+          <option value="duckduckgo" {{if eq .FaviconService "duckduckgo"}}selected{{end}}>DuckDuckGo</option>
+          <option value="self" {{if eq .FaviconService "self"}}selected{{end}}>Self (Kafka)</option>
         </select>
       </div>
     </section>

internal/views/templates/result_item.html

@@ -4,8 +4,8 @@
     <a href="{{.URL}}" target="_blank" rel="noopener noreferrer">{{.SafeTitle}}</a>
   </div>
   <div class="result_url">
-    {{if .Domain}}
-    <img class="result-favicon" src="/favicon/{{.Domain}}" alt="" loading="lazy" width="14" height="14">
+    {{if .FaviconIconURL}}
+    <img class="result-favicon" src="{{.FaviconIconURL}}" alt="" loading="lazy" width="14" height="14">
     {{end}}
     <a href="{{.URL}}" target="_blank" rel="noopener noreferrer">{{.URL}}</a>
     <span class="engine-badge" data-engine="{{.Engine}}">{{.Engine}}</span>

internal/views/templates/video_item.html

@@ -12,6 +12,9 @@
       <a href="{{.URL}}" target="_blank" rel="noopener noreferrer">{{.SafeTitle}}</a>
     </div>
     <div class="result_url">
+      {{if .FaviconIconURL}}
+      <img class="result-favicon" src="{{.FaviconIconURL}}" alt="" loading="lazy" width="14" height="14">
+      {{end}}
       {{if .URL}}
       <a href="{{.URL}}" target="_blank" rel="noopener noreferrer">{{.URL}}</a>
       {{end}}

internal/views/views.go

@@ -57,6 +57,7 @@ type PageData struct {
 	IsImageSearch       bool
 	// Theme is the user's selected theme (light/dark) from cookie
 	Theme          string
+	FaviconService string
 	// New fields for three-column layout
 	Categories         []string
 	CategoryIcons      map[string]string
@@ -76,6 +77,8 @@ type ResultView struct {
 	TemplateName string
 	// Domain is the hostname extracted from the result URL, used for favicon proxying.
 	Domain string
+	// FaviconIconURL is the resolved favicon image URL for the user's favicon preference (empty = hide).
+	FaviconIconURL string
 	// SafeTitle and SafeContent are HTML-unescaped versions for rendering.
 	// The API returns HTML entities which Go templates escape by default.
 	SafeTitle   template.HTML
@@ -152,8 +155,26 @@ func OpenSearchXML(baseURL string) ([]byte, error) {
 	return []byte(result), nil
 }
 
+// faviconIconURL returns a safe img src for the given service and hostname, or "" for none/invalid.
+func faviconIconURL(service, domain string) string {
+	domain = strings.TrimSpace(domain)
+	if domain == "" {
+		return ""
+	}
+	switch service {
+	case "google":
+		return "https://www.google.com/s2/favicons?domain=" + url.QueryEscape(domain) + "&sz=32"
+	case "duckduckgo":
+		return "https://icons.duckduckgo.com/ip3/" + domain + ".ico"
+	case "self":
+		return "/favicon/" + domain
+	default:
+		return ""
+	}
+}
+
 // FromResponse builds PageData from a search response and request params.
-func FromResponse(resp contracts.SearchResponse, query string, pageno int, activeCategory, activeTime, activeType string) PageData {
+func FromResponse(resp contracts.SearchResponse, query string, pageno int, activeCategory, activeTime, activeType, faviconService string) PageData {
 	// Set defaults
 	if activeCategory == "" {
 		activeCategory = "all"
@@ -164,6 +185,7 @@ func FromResponse(resp contracts.SearchResponse, query string, pageno int, activ
 		Pageno:              pageno,
 		NumberOfResults:     resp.NumberOfResults,
 		UnresponsiveEngines: resp.UnresponsiveEngines,
+		FaviconService:      faviconService,
 
 		// New: categories with icons
 		Categories:         []string{"all", "news", "images", "videos", "maps"},
@@ -223,6 +245,7 @@ func FromResponse(resp contracts.SearchResponse, query string, pageno int, activ
 			MainResult:     r,
 			TemplateName:   tmplName,
 			Domain:         domain,
+			FaviconIconURL: faviconIconURL(faviconService, domain),
 			SafeTitle:      template.HTML(html.UnescapeString(r.Title)),
 			SafeContent:    template.HTML(html.UnescapeString(r.Content)),
 		}
@@ -328,8 +351,12 @@ func RenderSearchAuto(w http.ResponseWriter, r *http.Request, data PageData) err
 }
 
 // RenderPreferences renders the full preferences page.
-func RenderPreferences(w http.ResponseWriter, sourceURL, theme string) error {
+func RenderPreferences(w http.ResponseWriter, sourceURL, theme, faviconService string) error {
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-	return tmplPreferences.ExecuteTemplate(w, "base", PageData{ShowHeader: true, SourceURL: sourceURL, Theme: theme})
+	return tmplPreferences.ExecuteTemplate(w, "base", PageData{
+		ShowHeader:     true,
+		SourceURL:      sourceURL,
+		Theme:          theme,
+		FaviconService: faviconService,
+	})
 }
-

internal/views/views_test.go

@@ -1,6 +1,7 @@
 package views
 
 import (
+	"strings"
 	"testing"
 
 	"github.com/metamorphosis-dev/samsa/internal/contracts"
@@ -37,7 +38,7 @@ func mockEmptyResponse() contracts.SearchResponse {
 
 func TestFromResponse_Basic(t *testing.T) {
 	resp := mockSearchResponse("samsa trial", 42)
-	data := FromResponse(resp, "samsa trial", 1, "", "", "")
+	data := FromResponse(resp, "samsa trial", 1, "", "", "", "none")
 
 	if data.Query != "samsa trial" {
 		t.Errorf("expected query 'samsa trial', got %q", data.Query)
@@ -55,7 +56,7 @@ func TestFromResponse_Basic(t *testing.T) {
 
 func TestFromResponse_Pagination(t *testing.T) {
 	resp := mockSearchResponse("test", 100)
-	data := FromResponse(resp, "test", 3, "", "", "")
+	data := FromResponse(resp, "test", 3, "", "", "", "none")
 
 	if data.PrevPage != 2 {
 		t.Errorf("expected PrevPage 2, got %d", data.PrevPage)
@@ -80,7 +81,7 @@ func TestFromResponse_Pagination(t *testing.T) {
 }
 
 func TestFromResponse_Empty(t *testing.T) {
-	data := FromResponse(mockEmptyResponse(), "", 1, "", "", "")
+	data := FromResponse(mockEmptyResponse(), "", 1, "", "", "", "none")
 
 	if data.NumberOfResults != 0 {
 		t.Errorf("expected 0 results, got %d", data.NumberOfResults)
@@ -90,6 +91,31 @@ func TestFromResponse_Empty(t *testing.T) {
 	}
 }
 
+func TestFromResponse_FaviconIconURL(t *testing.T) {
+	u := "https://example.com/path"
+	resp := contracts.SearchResponse{
+		Query:               "q",
+		NumberOfResults:     1,
+		Results:             []contracts.MainResult{{Title: "t", URL: &u, Engine: "bing"}},
+		Answers:             []map[string]any{},
+		Corrections:         []string{},
+		Infoboxes:           []map[string]any{},
+		Suggestions:         []string{},
+		UnresponsiveEngines:   [][2]string{},
+	}
+	data := FromResponse(resp, "q", 1, "", "", "", "google")
+	if len(data.Results) != 1 {
+		t.Fatalf("expected 1 result, got %d", len(data.Results))
+	}
+	got := data.Results[0].FaviconIconURL
+	if got == "" || !strings.Contains(got, "google.com/s2/favicons") {
+		t.Fatalf("expected google favicon URL, got %q", got)
+	}
+	if !strings.Contains(got, "example.com") {
+		t.Fatalf("expected domain in favicon URL, got %q", got)
+	}
+}
+
 func TestIsHTMXRequest(t *testing.T) {
 	tests := []struct {
 		name    string