Fix generated palette code

- Only include my scales for custom palettes
- Do not include bogus role declarations

docs/docs/palettes/app/color/get-palette-code.js

@@ -51,6 +51,11 @@ export function getPaletteCode({ base, slug = base, colors, tweaked, roles, ...o
   if (roles) {
     for (let role in roles) {
       let hue = roles[role];
+
+      if (!hue) {
+        continue;
+      }
+
       for (let suffix of [...tints.map(t => '-' + t), '', '-key']) {
         declarations.push(`--${prefix}-${role}${suffix}: var(--${prefix}-${hue}${suffix});`);
       }

docs/docs/palettes/app/tweak.js

@@ -409,7 +409,7 @@ let paletteAppSpec = {
         let code = getPaletteCode({
           base: this.paletteId,
           slug: this.isCustom ? this.slug : undefined,
-          colors: this.colors,
+          colors: this.paletteScales,
           tweaked: this.tweaked,
           roles: this.isCustom ? this.computedRoles : this.roles,
           language,