Feat v0.2.5 ui polish dead code (#9)

Co-authored-by: Jeffrey Smith <jasafpro@gmail.com>
Co-committed-by: Jeffrey Smith <jasafpro@gmail.com>

server/middleware/auth.go

@@ -142,6 +142,21 @@ func parseAndValidateJWT(tokenString string, jwtSecret string) (*Claims, bool) {
 	return claims, true
 }
 
+// UserIDFromCookie extracts the user ID from the sb_token cookie without
+// requiring authentication. Returns "" if no valid token is found.
+// Used by unauthenticated routes that want optional user context.
+func UserIDFromCookie(c *gin.Context, jwtSecret string) string {
+	cookie, err := c.Cookie("sb_token")
+	if err != nil || cookie == "" {
+		return ""
+	}
+	claims, ok := parseAndValidateJWT(cookie, jwtSecret)
+	if !ok {
+		return ""
+	}
+	return claims.UserID
+}
+
 // ─── Auth middleware ─────────────────────────────────────────
 
 // Auth returns a Gin middleware that validates JWT bearer tokens and