Initial commit: Lookbook personal collection app

Pinterest-like app for saving images, videos, quotes, and embeds.

Features:
- Go backend with PostgreSQL, SSR templates
- Console-based admin auth (login/logout via browser console)
- Item types: images, videos (ffmpeg transcoding), quotes, embeds
- Media stored as BLOBs in PostgreSQL
- OpenGraph metadata extraction for links
- Embed detection for YouTube, Vimeo, Twitter/X
- Masonry grid layout, item detail pages
- Tag system with filtering
- Refresh metadata endpoint with change warnings
- Replace media endpoint for updating item images/videos

internal/handlers/context.go

@@ -0,0 +1,27 @@
+package handlers
+
+import (
+	"database/sql"
+	"log/slog"
+	"net/http"
+
+	"git.soup.land/soup/sxgo/ssr"
+)
+
+// RequestContext holds dependencies that are injected into every request handler.
+type RequestContext struct {
+	DB        *sql.DB
+	Logger    *slog.Logger
+	TmplCache *ssr.TmplCache
+	IsAdmin   bool // true if authenticated as admin
+}
+
+// RequireAdmin checks authentication and returns 401 if not admin.
+// Returns true if authenticated, false if 401 was sent.
+func (rc *RequestContext) RequireAdmin(w http.ResponseWriter) bool {
+	if !rc.IsAdmin {
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
+		return false
+	}
+	return true
+}