Fix blank page: URL types and inline style issues in templates

- Use template.URL for all URLs passed to templates (RSSURL, ImageURL)
- Pre-compute episode image URLs in handler as safe types
- Remove all inline style attributes, use CSS classes instead
- Add template error logging to catch silent failures
- HTML/template rejects raw strings in URL and CSS+URL contexts

handler/episode.go

@@ -2,6 +2,7 @@ package handler
 
 import (
 	"fmt"
+	"html/template"
 	"io"
 	"net/http"
 	"os"
@@ -40,20 +41,47 @@ func (h *EpisodeHandler) ServeDashboard(w http.ResponseWriter, r *http.Request)
 	if title == "" {
 		title = "Podstalk"
 	}
+	type epView struct {
+		ID          int64
+		Title       string
+		Description string
+		AudioPath   string
+		ImageURL    template.URL
+		PublishedAt time.Time
+	}
+	var epViews []epView
+	for _, ep := range episodes {
+		ev := epView{
+			ID:          ep.ID,
+			Title:       ep.Title,
+			Description: ep.Description,
+			AudioPath:   ep.AudioPath,
+			PublishedAt: ep.PublishedAt,
+		}
+		if ep.ImagePath != "" {
+			ev.ImageURL = template.URL("/uploads/" + ep.ImagePath)
+		} else if user.PodcastImage != "" {
+			ev.ImageURL = template.URL("/uploads/" + user.PodcastImage)
+		}
+		epViews = append(epViews, ev)
+	}
+
+	podcastImageURL := template.URL("")
+	if user.PodcastImage != "" {
+		podcastImageURL = template.URL("/uploads/" + user.PodcastImage)
+	}
+
 	h.Tpl.Render(w, "dashboard", map[string]any{
-		"Episodes":      episodes,
-		"PodcastTitle":  title,
-		"PodcastSlug":   user.PodcastSlug,
-		"PodcastImage":  user.PodcastImage,
-		"PodcastAuthor": user.PodcastAuthor,
-		"BaseURL":       h.BaseURL,
-		"UserID":        user.ID,
+		"Episodes":        epViews,
+		"PodcastTitle":    title,
+		"PodcastSlug":     user.PodcastSlug,
+		"PodcastImageURL": podcastImageURL,
+		"PodcastAuthor":   user.PodcastAuthor,
+		"RSSURL":          template.URL(h.BaseURL + "/rss/" + user.PodcastSlug),
 	})
 }
-
 func (h *EpisodeHandler) ServeNew(w http.ResponseWriter, r *http.Request) {
 	userID := UserIDFromContext(r)
-
 	if r.Method == http.MethodGet {
 		h.Tpl.Render(w, "episode_form", map[string]any{"Editing": false})
 		return

handler/template.go

@@ -3,6 +3,7 @@ package handler
 import (
 	"html/template"
 	"io"
+	"log"
 )
 
 type Templates struct {
@@ -12,7 +13,8 @@ type Templates struct {
 func NewTemplates(tmpl *template.Template) *Templates {
 	return &Templates{tmpl: tmpl}
 }
-
 func (t *Templates) Render(w io.Writer, name string, data any) {
-	_ = t.tmpl.ExecuteTemplate(w, name+".html", data)
+	if err := t.tmpl.ExecuteTemplate(w, name+".html", data); err != nil {
+		log.Printf("template error: %s: %v", name, err)
+	}
 }