Initial lookbook implementation

Pinterest-style visual bookmarking app with:
- URL metadata extraction (OG/Twitter meta, oEmbed fallback)
- Image caching in Postgres with 480px thumbnails
- Multi-tag filtering with Ctrl/Cmd for OR mode
- Fuzzy tag suggestions and inline tag editing
- Browser console auth() with first-use password setup
- Brutalist UI with Commit Mono font and Pico CSS
- Light/dark mode via browser preference

internal/handlers/templates.go

@@ -0,0 +1,23 @@
+package handlers
+
+import (
+	"encoding/json"
+	"html/template"
+	"strings"
+
+	"git.soup.land/soup/lookbook/internal/static"
+)
+
+var TemplateFuncs = template.FuncMap{
+	"staticURL": static.VersionedPath,
+	"json":      jsonTemplate,
+}
+
+func jsonTemplate(v any) template.JS {
+	payload, err := json.Marshal(v)
+	if err != nil {
+		return template.JS("null")
+	}
+	safe := strings.ReplaceAll(string(payload), "</", "<\\/")
+	return template.JS(safe)
+}